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1
Sabishchenko, Oleksandr, Rafał Rębilas, Norbert Sczygiol, and Mariusz Urbański. "Ukraine Energy Sector Management Using Hybrid Renewable Energy Systems." Energies 13, no. 7 (April 7, 2020): 1776. http://dx.doi.org/10.3390/en13071776.
Повний текст джерелаАнотація:
The Ukrainian energy sector is one of the most inflexible energy sectors in the world as a result of the almost complete depreciation of the equipment of the main sources of power supply: nuclear, thermal, and hydropower. In connection with existing problems, there is a need to develop and use new energy-saving technologies based on renewable energy sources. In this proposed research, a regression model of renewable energy growth in the energy sector of Ukraine was developed. The studied literature reveals that the independent use of individual functioning elements of renewable energy sources function as the primary power source that is not an optimal solution for stable energy supply. This study proposes the use of hybrid renewable energy systems, namely a combination of two or more renewable energy sources that will help each other to achieve higher energy efficiency, accelerate the growth of renewable energy in the share of the Ukrainian energy sector and/or improve functioning with battery energy storages. Moreover, the use of hybrid renewable energy systems in Ukraine will reduce the human impact on the environment, realize the potential of local renewable energy resources and also increase the share of electricity generation from renewable energy sources. Therefore, mechanisms for managing state regulation of stimulating the development of hybrid renewable energy systems have been developed.
2
Pekur, D. V., Yu V. Kolomzarov, V. P. Kostilov, V. M. Sorokin, V. I. Kornaga, R. M. Korkishko, and Yu E. Nikolaenko. "Supercapacitor energy storage systems for lighting systems with combined power supply." Технология и конструирование в электронной аппаратуре, no. 1-2 (2021): 3–9. http://dx.doi.org/10.15222/tkea2021.1-2.03.
Повний текст джерелаАнотація:
Modern continuous lighting systems use powerful high-performance LEDs as light sources and an important task is to begin using alternative renewable energy sources for their power supply (including during the day). The simplest of the renewable energy sources is photovoltaic solar energy converter. However, solar photovoltaic generation depends significantly on many factors - geographical location, time of day, state of the atmosphere, time of year and the like. In addition, photovoltaic generation depends on the weather conditions and cloudiness, which makes it unstable and prone to change drastically (by an order of magnitude) during daylight hours. Therefore, an important element of the power system based on renewable energy sources is the system of accumulation of generated energy. The method of power stabilization using supercapacitors for systems with a significant change in power generation in the electrical power system is analyzed. The paper offers design principles of the power supply systems for powerful LEDs with supercapacitor energy storage devices intended to make the use of energy from sources with variable generation more efficient. The systems with supercapacitor-based drives, which allow to ensure stable operation of the lighting system when the power supply from an alternative source is absent or reduced, provide high safety and reliability, and have a significantly longer service life than battery-based energy storage systems.
3
Krupenev, Dmitry. "Assessment of Power System Adequacy with Renewable Energy Sources and Energy Storage Systems." E3S Web of Conferences 58 (2018): 01012. http://dx.doi.org/10.1051/e3sconf/20185801012.
Повний текст джерелаАнотація:
The paper deals with the problem of the accounting of renewable energy sources and energy storage systems in assessment of power system adequacy. Development of renewable energy sources and energy storage systems in the present day power systems is one of the main focuses. In power systems of some countries the share of electric energy generated by renewable energy sources is above 50 % in the energy balance. Therefore, the plans on development of the present day power systems must be elaborated with the proper accounting of operation of renewable energy sources and energy storage systems and the sound capacity reserves in terms of these facilities. The paper presents the algorithms for the accounting of renewable energy sources and energy storage systems. The experimental studies performed illustrate feasibility of the suggested algorithms.
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Simões, Marcelo G., Felix A. Farret, Hosna Khajeh, Mahdi Shahparasti, and Hannu Laaksonen. "Future Renewable Energy Communities Based Flexible Power Systems." Applied Sciences 12, no. 1 (December 23, 2021): 121. http://dx.doi.org/10.3390/app12010121.
Повний текст джерелаАнотація:
This paper presents a new holistic approach that combines solutions for the future power systems. It describes clearly how solar energy is definitely the best outlet for a clean and sustainable planet, either due to their use in both vertical (V) or horizontal (H) forms such as: hydroelectric V&H, wind V&H, thermo-oceanic V&H, water movement sea V&H (tides and waves), solar thermoelectric, PV, and surface geothermal energy. New points of view and simple formulas are suggested to calculate the best characteristic intensity, storage means and frequency for specific places and how to manage the most well-known renewable sources of energy. Future renewables-based power system requires a huge amount of flexibility from different type and size of controllable energy resources. These flexible energy resources can be used in an aggregated manner to provide different ancillary services for the distribution and transmission network. In addition, flexible energy resources and renewable generation can be utilized in different kinds of energy communities and smart cities to benefit all stakeholders and society at the same time with future-proof market structures, new business models and management schemes enabling increased utilization of flexible energy resources. Many of the flexible energy resources and renewable-based generation units are also inverter-interfaced and therefore the authors present future power converter systems for energy sources as well as the latest age of multilevel converters.
5
Amutha, W. Margaret, H. Caleb Andrew, A. Debie Shajie, and J. Praveen Immanuel Paulraj. "Renewable power interface based rural telecom." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (June 1, 2019): 917. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp917-927.
Повний текст джерелаАнотація:
<span>To power remote area telecom where grid supplied electricity is unreliable, an alternative exists in the form of renewable energy sources. These sources mainly rely on the weather condition of a particular area for their source of power. To overcome such problem, hybridization of energy sources are prefered. Hybridization of solar-wind systems use a separate converter for each source thus leading to a complex, bulky and less efficient system. This paper presents a single renewable power interface which allows solar and wind sources to supply the load separately or simultaneously depending on the availability of the energy sources. It uses cuk and sepic converter topologies to form cuk-seic interfece. These systems also use battery backup to store excess energy and to make best use of their operating characteristics. Performance comparison between a cuk-sepic renewable power interface with and without MPPT using MATLAB/SIMULINK is presented. A detailed componentwise analysis is also done to calculate best efficient interface. It is found that the cuk-sepic interface with MPPT is efficient. A lab level model for cuk-sepic interface is developed and tested. The experimental results proved the effective operation of a single renewable power cuk-sepic interface with MPPT. </span>
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Vasil’ev, I. A., G. I. Kol’nichenko, Y. V. Tarlakov, and A. V. Sirotov. "Renewable energy sources in independent systems of power supply." FORESTRY BULLETIN 24, no. 4 (August 2020): 91–97. http://dx.doi.org/10.18698/2542-1468-2020-4-91-97.
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Jaszczur, Marek, Qusay Hassan, Haidar N. Al-Anbagi, and Patryk Palej. "A numerical analysis of a HYBRID PV+WT power system." E3S Web of Conferences 128 (2019): 05001. http://dx.doi.org/10.1051/e3sconf/201912805001.
Повний текст джерелаАнотація:
The increase in global energy consumption and the expected exhaustion of traditional energy sources, especially in the last century, led to an increased search for alternative sources of energy.The use of renewable energy sources has become extremely important to reduce dependence on fossil fuels. Due to the stochastic nature of the renewable energy sources such as the wind speed fluctuation and the intensity of solar radiation the stable operation of the systems base single renewable source can be problematic. But the using two or more of these sources results in higher stability than relying on a single source. For this reason, hybrid renewable energy systems have become an attractive solution in thefield of renewable energy. A hybrid energy system is a combination of two or more renewable energy sources that can enhance each another to increase the reliability of the supplied energy. The objective of this paper is investigation about the energy supplying improvement and the energy efficiency utilisation by hybridisation using two renewable energy resources: wind energy and solar energy with respect two different optimisation objectives: economical to reduce the net present cost and ecological to reduce CO2 emissions. Presented system has been implemented to supply a single household with an electric load.
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Hernández, Jesus C. "Grid-Connected Renewable Energy Sources." Electronics 10, no. 5 (March 3, 2021): 588. http://dx.doi.org/10.3390/electronics10050588.
Повний текст джерелаАнотація:
The use of renewable energy sources (RESs) is a need of global society. This editorial, and its associated Special Issue “Grid-Connected Renewable Energy Sources”, offer a compilation of some of the recent advances in the analysis of current power systems composed after the high penetration of distributed generation (DG) with different RESs. The focus is on both new control configurations and novel methodologies for the optimal placement and sizing of DG. The eleven accepted papers certainly provide a good contribution to control deployments and methodologies for the allocation and sizing of DG.
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Dragomir, Florin, and Otilia Elena Dragomir. "Improvement of Energy Consume from Hybrid Systems Integrating Renewable Energy Sources." Advanced Materials Research 512-515 (May 2012): 1147–50. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.1147.
Повний текст джерелаАнотація:
This article proposes a solution for smart grid technologies using renewable energy and has as main result the optimisation of energy generation and consum in a power system with distributed power generation from renewable resources, by designing and implementation an system platform for monitoring and transmission the message (phone via SMS) by consumers. This application make available to consumers real-time information about energy, giving them the opportunity to make smart choices, allowing them to reduce their monthly bills and carbon emissions, reducing also the demand during peak periods and allows a more efficient use of renewable energy resources.
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D`Arco, S., R. Rizzo, D. Coll-Mayor, and P. Tricoli. "Energy management of stand-alone power systems with renewable energy sources." Renewable Energy and Power Quality Journal 1, no. 04 (April 2006): 372–78. http://dx.doi.org/10.24084/repqj04.469.
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Obukhov, S. G., G. N. Klimova, and A. Ibrahim. "Methodology of optimum unit commitment of energy systems with renewable energy sources." Vestnik IGEU, no. 6 (December 28, 2020): 25–38. http://dx.doi.org/10.17588/2072-2672.2020.6.025-038.
Повний текст джерелаАнотація:
One of the promising ways to improve the reliability and efficiency of power supply for customers in the areas remote from central electrical grid is the use of hybrid power systems with renewable energy sources. The primary task of designing such systems is the unit commitment of the generating equipment that provides the optimal technical and economic indexes of the electric power system. The stochastic nature of generation and nonlinearity of the characteristics of power plants cause a high complexity of solving this problem, which, from a mathematical point of view, is formulated as an optimization problem. An accurate and reliable solution of this optimization problem increases the efficiency of design and operation of hybrid electric power systems with renewable energy sources. And it is a vital task of modern power industry. A probabilistic-statistical methods and models for the analysis of experimental data are used to construct climatic time series and graphs of electrical loads. In addition, to study the operating modes of the electric power system the MatLab system is used for the simulation and modeling, and an evolutionary particle swarm algorithm is used to solve the optimization problem. The original model of solar radiation is used as a part of this methodology. This model provides forecasting the key characteristics of solar radiation in any geographical point of Russia including the areas that have no results of routine actinometric observation. Weibull distribution function is used to forecast daily variations of wind speed. It enhances the validity of forecasting of electricity generation of wind-driven power plant at daily time interval. As a result of the research, a method of optimum unit commitment has been developed for the equipment of electric power systems based on renewable energy sources. The use of the particle swarm algorithm as a part of the methodology provides reliable and accurate determination of the extremum of the objective function, which increases the efficiency of design and operation of hybrid electric power systems with renewable energy sources. The method has been tested on practical examples of optimum unit commitment for the equipment of electric power systems of various configurations and has proven its effectiveness. The technique is implemented as a software application, which ensures the convenience of its practical application. The obtained results can be used by companies involved in the design and operation of electric power systems using renewable energy generating units.
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Lorincz, Josip, and Ivana Bule. "Renewable Energy Sources for Power Supply of Base Station Sites." International Journal of Business Data Communications and Networking 9, no. 3 (July 2013): 53–74. http://dx.doi.org/10.4018/jbdcn.2013070104.
Повний текст джерелаАнотація:
An overview of research activity in the area of powering base station sites by means of renewable energy sources is given. It is shown that mobile network operators express significant interest for powering remote base stations using renewable energy sources. This is because a significant percentage of remote base station sites on the global level are still diesel powered due to lack of connections to the electricity grid. Besides huge expenses that mobile operators pay for diesel fuel and its transport to base station sites, it is pointed out that such base station sites represent major pollutants due to enormous green-house gas emissions. Since base stations are major consumers of cellular networks energy with significant contribution to operational expenditures, powering base stations sites using the energy of wind, sun, fuel cells or a combination gain mobile operators’ attention. It is shown that powering base station sites with such renewable energy sources can significantly reduce energy costs and improve the energy efficiency of the base station sites in rural areas. In addition, technical descriptions of the different power supply systems based on renewable sources with corresponding energy controllers for scheduling the flow of energy to power base station sites are discussed. According to the presented, hybrid systems which combine different renewable energy sources outperform those with only one energy source, and depend on the configuration of base stations installed on a particular site, such systems can offer autonomous functionality throughout the year.
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Khlyupin, P. A. "Electric energy storage units for distributed energy systems." Power and Autonomous equipment 2, no. 4 (January 24, 2020): 219–30. http://dx.doi.org/10.32464/2618-8716-2019-2-4-219-230.
Повний текст джерелаАнотація:
Introduction: there is much concern about power supply to small and remote villages and industrial facilities, such as crude oil and gas fields, in the present-day power industry. Systems using renewable energy sources are the most innovative solutions to this problem. The need for electric energy storage units complicates the use of renewable energy sources. Versatile types of storage units, working on different principles, are in use now. Flywheels, working on the principle of mechanical accumulation of energy, are of particular interest.Methods: both traditional and advanced designs of electric energy accumulation systems are analyzed in the article. Recent advancements in machine building, power engineering and structural materials are contributed into structural elements of an electric energy accumulation system.Results and discussion: basic strengths and weaknesses of electric energy storage units were identified in the course of the analysis. The author substantiated the need for new effective electric energy storage units working on the principle of mechanical accumulation of potential and kinetic energy. The conclusion is that advanced engineering solutions, such as flywheels and energy efficient reversible electric machines, can boost the efficiency of electric power storage systems. The solution underlying the design of an energy efficient storage unit is offered to electric power industry players.Conclusion: the storage unit under development has flywheels and energy efficient reversible electric machines. It improves the energy efficiency of both classical power generation systems and those using renewable energy sources.
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Shayesteh, E., J. Yu, and P. Hilber. "Maintenance optimization of power systems with renewable energy sources integrated." Energy 149 (April 2018): 577–86. http://dx.doi.org/10.1016/j.energy.2018.02.066.
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Liivik, Elizaveta, Yongheng Yang, Ariya Sangwongwanich, and Frede Blaabjerg. "Advancing Grid-Connected Renewable Generation Systems." Applied Sciences 11, no. 7 (March 29, 2021): 3058. http://dx.doi.org/10.3390/app11073058.
Повний текст джерелаАнотація:
If we look at the history of renewable energy sources (RESs), how it all began, and how rapidly they continue to develop, it can be argued that one of the main reasons is due to the rapid improvements in power electronics technology in interfacing the renewable source to the grid [...]
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Vasconcelos, L. J. C., and V. S. da Silva. "Energy Model Applied to Renewable Energy in Housing Systems." Defect and Diffusion Forum 369 (July 2016): 135–41. http://dx.doi.org/10.4028/www.scientific.net/ddf.369.135.
Повний текст джерелаАнотація:
In recent decades, global events and extreme changes make sustainable development and renewable energy a frequent subject of discussion in numerous global meetings. To analyze the energy matrix of a region in order to optimize it sustainably, is a way to reduce the impacts of these changes. Currently, the world energy matrix is made up of 81.0 % of non-renewable sources (78.4% oil and oil products, natural gas and coal, and 2.6 % uranium) and 19.0 % from renewable sources, (traditional biomass 9.0 %, bio-heat 2.6 %, 3.8% hydropower and 3.6% others renewable energies such as solar, wind, geothermal, biodiesel, ethanol, ocean power, etc.). In this sense, the aim of this work is to establish a sustainable model of energy planning in a region taking into account local characteristics and the efficiency in the power generation for residential systems. Energy demand data was collected from different Brazilian companies. From the data obtained, it was found that the method/model used is very efficient for the case study related to the energy efficiency of housing systems using renewable energy.
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Syvenko, Mykhailo, and Oleksandr Miroshnyk. "CALCULATION OF OPTIMAL PARAMETERS FOR STORAGE AND RENEWABLE ENERGY SOURCES IN ISOLATED ENERGY SYSTEMS." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (2) (July 2, 2021): 91–95. http://dx.doi.org/10.20998/2224-0349.2021.01.13.
Повний текст джерелаАнотація:
A detailed substantiation of the use of electric energy storage devices in the presence of generators on renewable energy sources in the power supply system is given. The dependence of the storage parameters on the composition and priority of generation in the system is investigated. The solution of the problem of determining the parameters of electricity storage devices by means of purposeful simulation of generation parameters is considered. The results of the choice of power and capacity of the energy storage using technical and economic indicators are shown. Optimal parameters of electric energy storage devices as one of the most important means of ensuring the activity of isolated power supply systems together with selection of generating devices are determined. The results of calculations of capacity of renewable energy sources in isolated power supply systems in combination with classical energy sources are given. The necessity of using the principle of activity of the distribution electric network and the possibility of its realization is demonstrated. The optimal storage capacity as a function of the share of renewable generation, the non-integrated energy produced by renewable sources and the total storage capacity are plotted for several isolated systems. The main points of the used model of the power supply system of isolated networks are given. In the studied isolated power supply systems, wind power plants and solar power plants, which have significant unpredictability of generation, are used as generation based on renewable energy sources. The problem of undersupply of electricity to the grid by stepwise increase of generation is analysed. The results of the multi-step selection of power and energy consumption of electricity storage are determined by technical criteria.
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Tabassum, Zahira, and Dr Chandrashekhar Shastry. "Renewable energy Sector in Gujarat, India." Journal of University of Shanghai for Science and Technology 23, no. 06 (June 18, 2021): 1128–40. http://dx.doi.org/10.51201/jusst/21/05401.
Повний текст джерелаАнотація:
Excessive use of traditional energy sources such as fossil fuels has resulted in significant environmental deterioration. India is one of the world’s fastest-growing energy consumers, and it is making continual efforts to increase renewable energy generation. The use of renewable energy sources to generate electricity is expanding every day. Renewable energy integration with existing power systems is a difficult endeavor that necessitates strategy and development. Climate-friendly energy systems will result from the use of renewable energy sources in power generation, as they lower CO2 emissions caused by fossil fuels used in conventional power generation. This research looks at a renewable energy scenario using Gujarat as a case study, which is a leader in renewable energy generation. The policies taken by the Gujarat government to increase renewable energy’s participation in the energy mix, as well as the challenges and potential solutions for boosting the deployment of renewable energy sources across Gujarat, are discussed. This study can be used as a guide for policymakers and researchers in other states and around the world who want to boost renewable energy share.
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Mahajan, Pooja, and Urmila Soni. "A Survey on Effective Grid Connected Power Flows in Renewable Energy System." SMART MOVES JOURNAL IJOSCIENCE 6, no. 11 (November 20, 2020): 9–13. http://dx.doi.org/10.24113/ijoscience.v6i11.323.
Повний текст джерелаАнотація:
The demand for electricity is increasing day by day and canNot be satisfactorily met without Non-renewable energy sources. Renewable energy sources such as wind and sun are universal and environmentally friendly. These renewable energy sources are the best options for meeting global energy needs, but they are unpredictable due to natural conditions. Using solar and wind hybrid renewable energy systems is the best option to take advantage of these available resources. This article introduces wind energy conversion systems, solar energy conversion systems, and multistage inverters.
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Ahmad, Manam, and Md Mizanur Rahman. "Augmented Kalina Cycle Using Renewable Energy as Input for Power Generation." International Journal of Chemical Engineering and Applications 13, no. 2 (June 2022): 10–13. http://dx.doi.org/10.18178/ijcea.2022.13.2.794.
Повний текст джерелаАнотація:
Kalina cycle is an idealized thermodynamic cycle that generates power using a binary mixture as a working substance. Depending on the application, the Kalina Cycle increase power plant efficiency by 10% to 50% over the Organic Rankine Cycle. The relative advantage of the Kalina cycle rises when operating temperatures are reduced and Kalina cycle is generating by mixture. Kalina cycle is identified as a bottoming cycle that demonstrates improved efficiency. Ammonia-water mixture is high-energy than a single component. Producing electricity of the inlet turbine and the temperature of the separator increase the performance of the cycle. It may be more effective to use the Kalina cycle for concentrating renewable energy sources such as solar power plants that use direct steam production to enhance heat exchange efficiency, and therefore, increase total system performance. This research attempts to build a Kalina cycle system, which will help to transform the natural source from sunlight to energy. Python open-source software has been used to design and implement the Kalina cycle. The suggested cycles include various types of solar collectors and extra heat recovery technologies. Systems uses a medium temperature heat source to analyze the Kalina cycle for different system characteristics and to conduct parametric research to determine which input temperature, ammonia concentrations, separator temperatures yield the optimal energy production. The Kalina cycle of binary plants generates 30% to 50 % more power for a provided heat source. With the Kalina cycle as a bottoming cycle for a cogeneration plant, the exhaust gas temperature has been reduced from 427 K to 350 K, which reduces the environmental impact.
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Karp, I. M., Y. Y. Nikitin, and K. Y. Pyanykh. "RENEWABLE SOURCES IN THE ENERGY SUPPLY SYSTEMS OF UKRAINIAN CITIES." Tekhnichna Elektrodynamika 2021, no. 1 (January 14, 2021): 40–49. http://dx.doi.org/10.15407/techned2021.01.040.
Повний текст джерелаАнотація:
70% of the population of Ukraine lives in cities. Electric energy supply of cities with dense buildings is provided mainly from centralized generation sources: TPPs, CHPs, NPPs, RES, and heat energy - from CHPs and gas boilers. Possibilities of energy self-sufficiency of Ukrainian cities based on use of alternative and local energy sources are analyzed. There is a global trend of increasing share of RES in cities energy supply, especially in cities and districts with cottage development. Providing cities with their own energy resources can be achieved through integrated use of renewable and local sources. Production of electricity from renewable sources in terms of return on investment EROI and normalized energy cost over life cycle of LCOE generation source is close to traditional sources indicators. Examples of RES usage to meet energy needs of houses and settlements in Europe are given. High cost of renewable energy stimulates development of this area in Ukraine. Efficiency of renewable and local sources usage in buildings is achieved only with simultaneous introduction of energy saving measures - insulation of buildings, introduction of energy control systems. References 14.
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Meegahapola, Lasantha, and Siqi Bu. "Special Issue: “Wind Power Integration into Power Systems: Stability and Control Aspects”." Energies 14, no. 12 (June 21, 2021): 3680. http://dx.doi.org/10.3390/en14123680.
Повний текст джерелаАнотація:
Power network operators are rapidly incorporating wind power generation into their power grids to meet the widely accepted carbon neutrality targets and facilitate the transition from conventional fossil-fuel energy sources to the clean and low-carbon renewable energy sources [...]
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Kuznietsov, Mykola, Olha Lysenko, and Oleksandr Melnyk. "OPTIMAL REGULATION OF LOCAL ENERGY SYSTEM WITH RENEWABLE ENERGY SOURCES." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (2) (July 2, 2021): 52–61. http://dx.doi.org/10.20998/2224-0349.2021.01.08.
Повний текст джерелаАнотація:
The paper is devoted to solving the balancing problem in local power systems with renewable energy sources. For a power system optimization problem, whose operation depends on random weather factors, a convex parameter optimization or optimal control problem was solved using controlled generation, for each individual realization of a random process as a deterministic function, and then statistical processing of results over a set of random realizations was performed and distribution density functions of the desired target function were constructed, followed by estimation of expected values and their confidence intervals. The process describing current deviations of generated power from mean value is modelled as discrete stray model and has properties of Ornstein-Uhlenbeck process, which allowed varying the duration of unit interval, in particular to select data bases of operating objects with inherent temporal discreteness of their monitoring systems. Random components are investigated and modelled, while the average values are considered to be deterministic and are provided within a predictable schedule using also traditional energy sources (centralised power grid). A mathematical model of the combined operation of renewable energy sources in a system with variable load, electric storage device and auxiliary regulating generator is implemented as a scheme of sequential generation and consumption models and random processes describing the current state of the power system. The operation of the electricity accumulators is dependent on the processes mentioned, but in the full balance, it appears together with generation or load losses, which are cumulative sums of unbalanced power and may have a different distribution from the normal one. However, these processes are internal, relating to the redistribution of energy within a generation system whose capacity is generally described satisfactorily, given the relevant criteria, by a normal law. Under this condition, it is possible to estimate the probability of different circumstances - over- or under-generation, that is, to give a numerical estimate of the reliability of energy supply.
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Kuleshov, V. N., N. V. Kuleshov, S. V. Kurochkin, A. A. Fedotov, E. E. Sleptsova, D. V. Blinov, A. A. Gavriluk, and I. E. Zhmurko. "Water electrolyzer for renewable energy systems." E3S Web of Conferences 289 (2021): 05004. http://dx.doi.org/10.1051/e3sconf/202128905004.
Повний текст джерелаАнотація:
The article is devoted to the features of the alkaline water electrolyzers use in power plants with a hydrogen energy storage systems based on renewable energy sources. The technology of nickel–cobalt electrodes electrochemical formation according to a printed 2–dimensional sketch is proposed. A new technique for the synthesis of diaphragms with a zirconium hydroxide hydrogel as a hydrophilic filler is considered. The current–voltage characteristics of an electrolytic cell located inside outer containment shell, designed for pressures up to 160 atm, are investigated.
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Mujanović, Azrina, Tatjana Konjić, and Adisa Dedić. "Electricity efficiency of auxiliary power systems in coal thermal power plant." International journal of electrical and computer engineering systems 11, no. 2 (July 15, 2020): 101–10. http://dx.doi.org/10.32985/ijeces.11.2.5.
Повний текст джерелаАнотація:
Renewable energy sources such as hydro, wind and solar energy are taking an increasing share in the electricity mix. However, electricity production from thermal power plants is independent of the weather conditions and is still important as a back-up power source to renewable energy sources. Given the fact that the electricity market is open, it is clear that each MWh is important. Therefore, auxiliary power systems as a part of thermal power plants should be also energy efficient. The main aim of the presented research was to investigate the efficient operation of different consumers in the auxiliary power system in the old-dated thermal power plant ‘’Tuzla’’ depending on different power at generator output. The performed analysis identified consumers suitable for electricity efficiency improvement giving results of power savings obtained on modestly available measurements and old-date technical documentation. Following obtained results, some recommendations for improving electricity efficiency were proposed with a rough calculation of possible savings. Measurements of auxiliary power system consumption depending on power at generator output in new thermal power plant ‘’Stanari’’ was presented. Future trends and directions in thermal power plant automation were also discussed.
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Mengi, Onur Ozdal, and Ismail Hakki Altas. "A New Energy Management Technique for PV/Wind/Grid Renewable Energy System." International Journal of Photoenergy 2015 (2015): 1–19. http://dx.doi.org/10.1155/2015/356930.
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An intelligent energy management system (IEMS) for maintaining the energy sustainability in renewable energy systems (RES) is introduced here. It consists of wind and photovoltaic (PV) solar panels are established and used to test the proposed IEMS. Since the wind and solar sources are not reliable in terms of sustainability and power quality, a management system is required for supplying the load power demand. The power generated by RES is collected on a common DC bus as a renewable green power pool to be used for supplying power to loads. The renewable DC power bus is operated in a way that there is always a base power available for permanent loads. Then the additional power requirement is supplied from either wind or PV or both depending upon the availability of these power sources. The decision about operating these systems is given by an IEMS with fuzzy logic decision maker proposed in this study. Using the generated and required power information from the wind/PV and load sides, the fuzzy reasoning based IEMS determines the amount of power to be supplied from each or both sources. Besides, the IEMS tracks the maximum power operating point of the wind energy system.
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Huynh, Van, Van Ngo, Dinh Le, and Nhi Nguyen. "Probabilistic Power Flow Methodology for Large-Scale Power Systems Incorporating Renewable Energy Sources." Energies 11, no. 10 (October 1, 2018): 2624. http://dx.doi.org/10.3390/en11102624.
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In this paper, we propose a new scheme for probabilistic power flow in networks with renewable power generation by making use of a data clustering technique. The proposed clustering technique is based on the combination of Principal Component Analysis and Differential Evolution clustering algorithm to deal with input random variables in probabilistic power flow. Extensive testing on the modified IEEE-118 bus test system shows good performance of the proposed approach in terms of significant reduction of computation time compared to the traditional Monte Carlo simulation, while maintaining an appropriate level of accuracy.
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Rahman, Md Mijanur, Mohammad Shakeri, Sieh Kiong Tiong, Fatema Khatun, Nowshad Amin, Jagadeesh Pasupuleti, and Mohammad Kamrul Hasan. "Prospective Methodologies in Hybrid Renewable Energy Systems for Energy Prediction Using Artificial Neural Networks." Sustainability 13, no. 4 (February 23, 2021): 2393. http://dx.doi.org/10.3390/su13042393.
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This paper presents a comprehensive review of machine learning (ML) based approaches, especially artificial neural networks (ANNs) in time series data prediction problems. According to literature, around 80% of the world’s total energy demand is supplied either through fuel-based sources such as oil, gas, and coal or through nuclear-based sources. Literature also shows that a shortage of fossil fuels is inevitable and the world will face this problem sooner or later. Moreover, the remote and rural areas that suffer from not being able to reach traditional grid power electricity need alternative sources of energy. A “hybrid-renewable-energy system” (HRES) involving different renewable resources can be used to supply sustainable power in these areas. The uncertain nature of renewable energy resources and the intelligent ability of the neural network approach to process complex time series inputs have inspired the use of ANN methods in renewable energy forecasting. Thus, this study aims to study the different data driven models of ANN approaches that can provide accurate predictions of renewable energy, like solar, wind, or hydro-power generation. Various refinement architectures of neural networks, such as “multi-layer perception” (MLP), “recurrent-neural network” (RNN), and “convolutional-neural network” (CNN), as well as “long-short-term memory” (LSTM) models, have been offered in the applications of renewable energy forecasting. These models are able to perform short-term time-series prediction in renewable energy sources and to use prior information that influences its value in future prediction.
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Buła, Dawid, Dariusz Grabowski, Andrzej Lange, Marcin Maciążek, and Marian Pasko. "Long- and Short-Term Comparative Analysis of Renewable Energy Sources." Energies 13, no. 14 (July 13, 2020): 3610. http://dx.doi.org/10.3390/en13143610.
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Network working conditions are influenced noticeably by the connection of renewable energy sources to distribution networks. This becomes more and more important due to the increase in renewable energy source penetration over the last few years. This in turn can lead to a mass effect. As a result, the classical open network model with simple unidirectional direction of energy flow has been replaced with an active model that includes many local energy sources. This paper deals with the analysis of long- and short-term changes in power and energy generated by three types of renewable energy sources with similar rated power and which operate in the same region (i.e., located no more than tens of kilometers away). The obtained results can be a starting point for a broader evaluation of the influence of renewable energy sources on power quality in power systems, which can be both positive (supply reliability) and negative (voltage fluctuations and higher harmonics in current and voltage waveforms). It is important not only to correctly place but also to assure the diversity of such sources as it has been confirmed by the source variability coefficient. The long-term analysis allows us also to estimate the annual repeatability of energy production and, furthermore, the profitability of investment in renewable sources in a given region.
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Frączek, Mariusz, Krzysztof Górski, and Leszek Wolaniuk. "Possibilities of Powering Military Equipment Based on Renewable Energy Sources." Applied Sciences 12, no. 2 (January 14, 2022): 843. http://dx.doi.org/10.3390/app12020843.
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Nowadays, the land forces of the Republic of Poland use mainly two forms of powering their equipment and military devices: by connecting various devices to the national power grid and by diesel-electric generators of individual vehicles. With the first solution, power cuts have to be taken into account. In the latter case, it is necessary to ensure large fuel deliveries on a timely manner. It entails a search for new solutions able to effectively meet the needs of an individual soldier and command posts. It has inspired engineers to work on renewable energy sources. This review paper presents a concept for photovoltaic cells usage and a concept for air turbines used to charge electric power sources of different powers for the individual needs of soldiers and command posts. Examples of solutions for mobile energy systems are presented in the research work. They were verified in terms of their suitability for military applications. The concept of using a personal device to supply power for charging batteries and elements of individual soldier equipment, including low-power radio stations, has been presented as well.
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Dr. S. Jeyanthi, Shilaja C,. "MULTI-OBJECTIVE OPTIMIZATION FOR OPTIMAL HYBRID RENEWABLE ENERGY SOURCE SELECTION IN HYBRID RENEWABLE ENERGY SYSTEMS." Psychology and Education Journal 58, no. 1 (January 15, 2021): 4283–88. http://dx.doi.org/10.17762/pae.v58i1.1496.
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Power generation is more important to fulfill power demand throughout the world. Population and their electric power demand are increasing day by day. Achieve the energy demand from end-users, and recent research works have concentrated on designing a hybrid energy system. This paper proposed a multi-objective optimized model of a hybrid renewable energy system for a grid. The optimal model can choose a suitable design model of solar, wind, diesel, and batteries interconnected in the hybrid energy system. Optimization is applied for minimizing the system cost, fuel cost and diminish the fuel emission. It also aimed to improve the reliability of renewable sources. Initially, the problem is defined as a multi-objective problem and solved by a multi-objective evolutionary algorithm. From the simulation results, it is identified that the proposed multi-objective evolutionary algorithm performs better.
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Dekhtiar, O. O. "ALTERNATIVE ENERGY SOURCES FOR INCREASING ENERGY EFFICIENCY OF IRRIGATION SYSTEMS." Міжвідомчий тематичний науковий збірник "Меліорація і водне господарство", no. 2 (December 12, 2019): 105–12. http://dx.doi.org/10.31073/mivg201902-182.
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Actuality of the problem. The article discusses the current level of use of alternative sources of electrical power in the world. The main areas of the global power development were determined, the statistical data of leading energy companies, analytical international organizations and financial institutions were analysed. For today, all civilized countries successfully switch to alternative energy sources: wind, solar energy, biofuels, etc. In addition, the use of solar energy is one of the most promising inexhaustible, renewable energy sources. The use of renewable energy sources replaces the traditional one, based on extractive technologies polluting the atmosphere with harmful emissions, and enhances the greenhouse effect, reduces the burden on the resource base and energy systems of countries and improves the environment. Sustainable development of the agricultural sector of the economy of Ukraine and, in particular, irrigated agriculture requires a reduction in energy dependence. In the structure of the cost of irrigation water, a significant share accounts for electrical power. That is why to increase the efficiency of irrigated agriculture, to ensure high and sustainable yields in the context of climate change, it is extremely important to reduce the cost of power consumption. The need to use alternative energy sources in the drainage complex of Ukraine as part of the implementation of the energy strategy of Ukraine, aimed at the transition to fficient use and consumption of energy resources is highlighted. The Institute of Water Problems and Land Reclamation deals with the investigations of measures and technologies to improve power efficiency to reduce the specific energy consumption for pumping water by pumping stations and to reduce the rate of power losses for water intake and water transportation by water supply paths. One of the effective measures to reduce power cost is the use of alternative energy sources, in particular solar energy. The economic potential of the measures for improving energy efficiency in irrigation systems wass estimated. Conclusions. The estimation showed that the use of modules of solar power plants installed above the surface of open irrigation canals will lead to lower energy costs in the face of a constant increase in tariffs, that is, it will help to increase the economic efficiency of irrigation, reduce the share of water resources in national energy consumption and have a positive environmental effect. The sale of surplus power to the energy system at “green” tariffs can significantly reduce the payback period for the modernization of the engineering infrastructure of irrigation systems.
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Ramos-Paja, Carlos A., Daniel González-Montoya, Adriana Trejos-Grisales, and Sergio I. Serna-Garcés. "Advances in Power and Energy Systems." TecnoLógicas 21, no. 42 (May 14, 2018): 9–11. http://dx.doi.org/10.22430/22565337.772.
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Processing electrical energy is one of the most important research fields in our society. So far, tremendous efforts have been made to improve the efficiency of each step in electrical systems: generation systems have been enhanced by introducing renewable energy sources and new control systems for conventional generators, losses have been reduced, the power quality of distribution and transmission systems has been increased, the life-time and state-of-health of energy storage devices have been extended, and sections of the power grid have been isolated for intelligent energy management.
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Qudaih, Yaser Soliman, and Takashi Hiyama. "Utilization of Energy Capacitor Systems in Power Distribution Networks with Renewable Energy Sources." Journal of Electromagnetic Analysis and Applications 02, no. 04 (2010): 244–51. http://dx.doi.org/10.4236/jemaa.2010.24030.
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Myronenko, V. G., and N. V. Veremeychyk. "Prospects for the implementation of autonomous power supply systems of agro-industrial production." Mehanization and electrification of agricultural, no. 13(112) (2021): 167–72. http://dx.doi.org/10.37204/0131-2189-2021-13-18.
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Annotation Purpose. Improving the efficiency of agricultural production by creating a reliable autonomous power supply system based on natural and own renewable energy sources. Methods. Methods of system analysis and design of technical systems. Results. Principles of building an effective system for the use of natural and own renewable energy sources in agriculture. The general structure and parameters of the energy supply system of agricultural production. Conclusions 1. According to the energy strategy, Ukraine by 2030 should increase the share of renewable energy in its overall energy balance by almost 3 times – from 8 to 25%. 2. One of the real ways to increase the reliability and efficiency of electricity supply of agricultural facilities is the transition to autonomous energy supply systems based on the use of their own renewable energy sources with a relative production cost within 0.43–0.98 of the cost of centralized electricity production. 3. The structure of a specific power supply system of the agro-industrial sector should be formed on the basis of the characteristics of production and household needs, assessment of the potential and characteristics of renewable energy sources and conditions of safe, cost-effective operation. Keywords: agricultural production, renewable energy, ecology, efficiency.
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TIAN, ZHIGANG, and AMIR AHMAD SEIFI. "RELIABILITY ANALYSIS OF HYBRID ENERGY SYSTEM." International Journal of Reliability, Quality and Safety Engineering 21, no. 03 (June 2014): 1450011. http://dx.doi.org/10.1142/s0218539314500119.
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A hybrid energy system integrates renewable energy sources like wind, solar, micro-hydro and biomass, fossil fuel power generators such as diesel generators and energy storage. Hybrid energy system is an excellent option for providing electricity for remote and rural locations where access to grid is not feasible or economical. Reliability and cost-effectiveness are the two most important objectives when designing a hybrid energy system. One challenge is that the existing methods do not consider the time-varying characteristics of the renewable sources and the energy demand over a year, while the distributions of a power source or demand are different over the period, and multiple power sources can often times complement one another. In this paper, a reliability analysis method is developed to address this challenge, where wind and solar are the two renewable energy sources that are considered. The cost evaluation of hybrid energy systems is presented. A numerical example is used to demonstrate the proposed method.
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Javakhishvili, Gela, and Giorgi Jabishvili. "The Importance of Energy Storage Systems in Modern Energy Systems." Works of Georgian Technical University, no. 1(523) (March 25, 2022): 163–72. http://dx.doi.org/10.36073/1512-0996-2022-1-163-172.
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The process of changing the overall structure of the power system is gradually shifting from fossil fuels to renewable energy sources that are more environmentally friendly and sustainable. The traditional electricity value chain consists of five links: fuel/energy source, generation, transmission, distribution and customer service. Energy storage systems are on the verge of becoming the "sixth link". They can store energy at low demand, low cost of generation, or from intermittent sources of energy, and to use it at high demand, high cost, or when there is no other means of generation. The potential services of energy storage systems are numerous and diverse and can cover a wide range, from larger, generation and transmission systems to relatively small distribution network systems and "beyond the meter" customers. The volume, nature, and quality of different services depend mainly on the power/capacity of the storage, versatility, technology, and automation, as well as location, user requirements, and regulatory constraints. Existing trends also indicate that the need for energy storage will increase amid high production and demand, which will require energy storage for several days, weeks or months in the future.
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Golovko, Sergey Vladimirovich, and Sergey Vladimirovich Kononenko. "Problems of designing stand-alone power supply systems using renewable energy sources." Vestnik of Astrakhan State Technical University 2021, no. 2 (November 30, 2021): 30–34. http://dx.doi.org/10.24143/1812-9498-2021-2-30-34.
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The paper considers the problems of designing autonomous power supply systems using the renewable energy resources. The efficiency of using energy resources in conditions of growing prices for electricity brings significant saving of both energy and financial factors. The analyses show that the main losses of energy resources are the result of inefficient use, distribution and consumption of electrical energy. There has been stated one of the most important problems of energy saving: many existing consumers are located at a significant distance from centralized power supply systems. Today connecting such consumers to large power grids is economically inexpedient. These facilities are supplied from the stand-alone power plants. According to the program of energy saving and energy efficiency improvement of FGC UES, PJSC, reducing electricity consumption for auxiliary needs of transformer substations is one of the main mechanisms for the program implementation.
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Prasun, Satyam Kumar, and Sanjeev Jararia. "Study On Hybrid Systems, Grid Integrated Based On Renewable Energy Systems Driving Local Loads." SMART MOVES JOURNAL IJOSCIENCE 5, no. 7 (July 12, 2019): 5. http://dx.doi.org/10.24113/ijoscience.v5i7.212.
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The demand for electricity power is increasing day by day, which cannot be met with the satisfied level without non-renewable energy resource. Renewable energy sources such as wind, solar are universal and ecological. These renewable energy sources are best options to fulfill the world energy demand, but unpredictable due to natural conditions. The use of the hybrid solar and wind renewable energy system like will be the best option forthe utilization these available resources. The objective of this paper is to study the various aspects of hybrid solar and wind system. The application and different theories related to the development of hybrid also discussed in this paper.
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Chetoshnikova, L. M., N. I. Smolentsev, S. A. Chetoshnikov, and G. V. Gusarov. "AUTONOMOUS POWER SUPPLY SYSTEMS WITH RENEWABLE SOURCES OF ENERGY AND SMART GRID." Proceedings of the higher educational institutions. ENERGY SECTOR PROBLEMS 20, no. 5-6 (August 5, 2018): 3–12. http://dx.doi.org/10.30724/1998-9903-2018-20-5-6-3-10.
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The use of modern devices and technologies in power supply systems will provide consumers with high-quality energy. Especially effective in this direction will be the construction of autonomous systems using renewable energy sources and local smart grids. The coordinated work of all elements of systems and optimal control of energy flows is solved by mathematical modeling methods.
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Sechilariu, Manuela. "Intelligent Energy Management of Electrical Power Systems." Applied Sciences 10, no. 8 (April 24, 2020): 2951. http://dx.doi.org/10.3390/app10082951.
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Smart grid implementation is facilitated by multi-source energy systems development, i.e., microgrids, which are considered the key smart grid building blocks. Whether they are alternative current (AC) or direct current (DC), high voltage or low voltage, high power or small power, integrated into the distribution system or the transmission network, multi-source systems always require an intelligent energy management that is integrated into the power system. A comprehensive intelligent energy system aims at providing overall energy efficiency with regard to the following: increased power generation flexibility, increased renewable generation systems, improved energy consumption, reduced CO2 emission, improved stability, and minimized energy cost. This Special Issue presents recent key theoretical and practical developments that concern the models, technologies, and flexible solutions to facilitate the following optimal energy and power flow strategies: the techno-economic model for optimal sources dispatching (mono and multi-objective energy optimization), real-time optimal scheduling, and real time optimization with model predictive control.
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Łukaszewski, Artur, Łukasz Nogal, and Marcin Januszewski. "The Application of the Modified Prim’s Algorithm to Restore the Power System Using Renewable Energy Sources." Symmetry 14, no. 5 (May 16, 2022): 1012. http://dx.doi.org/10.3390/sym14051012.
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The recent trends in the development of power systems are focused on the Self-Healing Grid technology fusing renewable energy sources. In the event of a failure of the power system, automated distribution grids should continue to supply energy to consumers. Unfortunately, there are currently a limited number of algorithms for rebuilding a power system with renewable energy sources. This problem is possible to solve by implementing restoration algorithms based on graph theory. This article presents the new modification of Prim’s algorithm, which has been adapted to operate on a power grid containing several power sources, including renewable energy sources. This solution is unique because Prim’s algorithm is ultimately dedicated to single-source graph topologies, while the proposed solution is adapted to multi-source topologies. In the algorithm, the power system is modeled by the adjacency matrices. The adjacency matrixes for the considered undirected graphs are symmetric. The novel logic is based on the original method of determining weights depending on active power, reactive power and active power losses. The developed solution was verified by performing a simulation on a test model of the distribution grid powered by a renewable energy source. The control logic concept was compared with the reference algorithms, which were chosen from the ideas representing available approaches based on graph theory present in the scientific publications. The conducted research confirmed the effectiveness and validity of the novel restoration strategy. The presented algorithm may be applied as a restoration logic dedicated to power distribution systems.
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Coiante, Domenico. "Limiti e prospettive delle fonti rinnovabili in Italia." ECONOMICS AND POLICY OF ENERGY AND THE ENVIRONMENT, no. 2 (May 2009): 163–79. http://dx.doi.org/10.3280/efe2008-002011.
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- The Italian energy balance for year 2005 is discussed with particular attention on renewable energy production. The potentials of renewable sources are evaluated in terms of energy density that can be obtained from occupied plant area. About 20000 km2 of sunny barren lands are present in South of Italy, particularly suitable for photovoltaic plants and that corresponds to a potential production of 144 Mtep of primary energy. Therefore, in theory, the photovoltaic energy potential is comparable with energy balance. The grid connection limit due to intermittent power generation of photovoltaic and wind energy systems is considered in relation with the stability of grid power level. Assuming a 25% maximum grid penetration of intermittent power with respect to capacity of active thermoelectric generators, the renewable energy contribution amounts to about 2% of annual energy balance. In front of expectations for a larger contribution, the practical result is the renewable energy production of present systems is marginal, unsuitable for counteracting the global climate crisis. The conclusion is that, for exploiting the large renewable energy potential, is necessary to implement the plants with an energy storage system able to overcome the source intermittency. Without this improvement, the expectations on renewable energy sources could be disappointed.Key words: intermittent renewable sources, energy production limit, grid connection
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Roshchin, Oleg A. "The Prospect of Using Renewable Energy in Russia." Elektrotekhnologii i elektrooborudovanie v APK 2, no. 43 (2021): 41–47. http://dx.doi.org/10.22314/2658-4859-2021-68-2-41-47.
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The features of Russia is the low population density on huge, poorly developed lands in terms of production. About 20 million people live in the territory where there is no centralized power supply, power supply is organized on generating systems running on imported fuel. (Research purpose) The research purpose is in studying the prospects for the development of microgrids based on the use of alternative energy generating systems of renewable energy sources using a micro-gas turbine plant as the base generator, which is the source of the reference voltage of microgrid based on single-wire resonant distribution networks of a new generation in Russia. (Materials and methods) The article presents the prospects for the development of microgrids based on material taken from open sources. Authors applied the methods of scientific analysis of events, facts, materials, and conclusions. (Results and discussions) The article shows that the world energy system evolutionarily enters a new fourth stage of fundamental transformation, called the "Energy Transition". The creation of microgrids based on renewable energy sources with a basic micro-gas turbine unit and single-wire resonant distribution networks of a new generation is an indisputable proof of this energy transition. (Conclusions) In many countries of the world, there is an increase in the share of distributed generation based on renewable energy sources, the introduction of new centralized generation capacities is reduced, investments in the construction of large power plants and new high-voltage transmission lines are reduced due to the development of distributed generation. Distributed generation contributes to the rapid expansion of electricity production without the need for additional development of the power grid infrastructure.
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Luo, Jianqiang, Yiqing Zou, Siqi Bu, and Ulas Karaagac. "Converter-Driven Stability Analysis of Power Systems Integrated with Hybrid Renewable Energy Sources." Energies 14, no. 14 (July 16, 2021): 4290. http://dx.doi.org/10.3390/en14144290.
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Renewable energy sources such as wind power and photovoltaics (PVs) have been increasingly integrated into the power system through power electronic converters in recent years. However, power electronic converter-driven stability has issues under specific circumstances, for instance, modal resonances might deteriorate the dynamic performance of the power systems or even threaten the overall stability. In this work, the integration impact of a hybrid renewable energy source (HRES) system on modal interaction and converter-driven stability was investigated in an IEEE 16-machine 68-bus power system. In this paper, firstly, an HRES system is introduced, which consists of full converter-based wind power generation (FCWG) and full converter-based photovoltaic generation (FCPV). The equivalent dynamic models of FCWG and FCPV are then established, followed by linearized state-space modeling. On this basis, converter-driven stability analysis was performed to reveal the modal resonance mechanisms between different renewable energy sources (RESs) and weak grids in the interconnected power systems and the multi-modal interaction phenomenon. Additionally, time-domain simulations were conducted to verify the effectiveness of dynamic models and support the converter-driven stability analysis results. To avoid detrimental modal resonances, a multi-modal and multi-parametric optimization strategy is further proposed by retuning the controller parameters of the multi-RESs in the HRES system. The overall results demonstrate the modal interaction effect between the external AC power system and the HRES system and its various impacts on converter-driven stability.
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Salkuti, Surender Reddy. "Optimal Operation of Microgrid considering Renewable Energy Sources, Electric Vehicles and Demand Response." E3S Web of Conferences 87 (2019): 01007. http://dx.doi.org/10.1051/e3sconf/20198701007.
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This paper proposes a new optimal operation of Microgrids (MGs) in a distribution system with wind energy generators (WEGs), solar photovoltaic (PV) energy systems, battery energy storage (BES) systems, electric vehicles (EVs) and demand response (DR). To reduce the fluctuations of wind, solar PV powers and load demands, the BES systems and DR are utilized in the proposed hybrid system. The detailed modeling of WEGs, solar PV units, load demands, BES systems and EVs has been presented in this paper. The objective considered here is the minimization of total operating cost of microgrid, and it is formulated by considering the cost of power exchange between the main power grid and microgrid, cost of wind and solar PV energy systems, cost of BES systems, EVs and the cost due to the DR in the system. Simulations are performed on a test microgrid, and they are implemented using GAMS software. Various case studies are performed with and without considering the proposed hybrid system.
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Ramirez Camargo, L., R. Zink, and W. Dorner. "SPATIOTEMPORAL MODELING FOR ASSESSING COMPLEMENTARITY OF RENEWABLE ENERGY SOURCES IN DISTRIBUTED ENERGY SYSTEMS." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences II-4/W2 (July 10, 2015): 147–54. http://dx.doi.org/10.5194/isprsannals-ii-4-w2-147-2015.
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Spatial assessments of the potential of renewable energy sources (RES) have become a valuable information basis for policy and decision-making. These studies, however, do not explicitly consider the variability in time of RES such as solar energy or wind. Until now, the focus is usually given to economic profitability based on yearly balances, which do not allow a comprehensive examination of RES-technologies complementarity. Incrementing temporal resolution of energy output estimation will permit to plan the aggregation of a diverse pool of RES plants i.e., to conceive a system as a virtual power plant (VPP). This paper presents a spatiotemporal analysis methodology to estimate RES potential of municipalities. The methodology relies on a combination of open source geographic information systems (GIS) processing tools and the in-memory array processing environment of Python and NumPy. Beyond the typical identification of suitable locations to build power plants, it is possible to define which of them are the best for a balanced local energy supply. A case study of a municipality, using spatial data with one square meter resolution and one hour temporal resolution, shows strong complementarity of photovoltaic and wind power. Furthermore, it is shown that a detailed deployment strategy of potential suitable locations for RES, calculated with modest computational requirements, can support municipalities to develop VPPs and improve security of supply.
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Martinez, Nicolas, Youssef Benchaabane, Rosa Elvira Silva, Adrian Ilinca, Hussein Ibrahim, Ambrish Chandra, and Daniel R. Rousse. "Computer Model for a Wind–Diesel Hybrid System with Compressed Air Energy Storage." Energies 12, no. 18 (September 16, 2019): 3542. http://dx.doi.org/10.3390/en12183542.
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A hybrid system combines two or more energy sources as an integrated unit to generate electricity. The nature of the sources associated varies between renewable and/or non-renewable energies. Such systems are becoming popular as stand-alone power systems to provide electricity, especially in off grid remote areas where diesel generators act as primary energy source. Wind–diesel systems are among the preferred solutions for new installations, as well as the upgrade of existing ones. However, efforts to address technical challenges towards energy transformation for sustainable development are multiple. The use of energy storage systems is a solution to reduce energy costs and environmental impacts. Indeed, efficient and distributed storage not only allows the electricity grid greater flexibility in the face of demand variations and greater robustness thanks to the decentralization of energy sources, it also offers a solution to increase the use of intermittent renewables in the energy mix. Among different technologies for electrical energy storage, compressed air energy storage is proven to achieve high wind energy penetration and optimal operation of diesel generators. This paper presents a computer model for performance evaluation of a wind–diesel hybrid system with compressed air energy storage. The model has been validated by comparing the results of a wind–diesel case study against those obtained using HOMER software (National Renewable Energy Laboratory, Golden, CO, United States). Different operation modes of the hybrid system are then explored. The impact of hybridization on time and frequency of operation for each power source, fuel consumption and energy dissipation has been determined. Recommendations are made on the choice of key parameters for system optimization.
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Zacharias, Peter. "Perspectives of SiC Power Devices in Highly Efficient Renewable Energy Conversion Systems." Materials Science Forum 615-617 (March 2009): 889–94. http://dx.doi.org/10.4028/www.scientific.net/msf.615-617.889.
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In the long run, regenerative energy sources represent the most important alternatives to fossil fuels. In general, they are characterized by decentralized logistics and supply capabilities due to ihnerent lower energetic densitiy per are, when compared with the fossil counterparts. As a result, the increased use of regenerative energy sources will require decentralized structures for energy supply, consumption optimisation and regional balancing between supply and demand. Both, the more efficient utilization of fossil energy sources and the utilization of regenerative energy sources, lead to increasingly decentralized supply structures and can be understood as being both complementary and convergent in relation to each other. Most of the converter units for utilization of decentralized energy resources (DER) use power electronics for the AC power conditioning with grid quality. The current paper shows market perspectives of DER applications and the impact of SiC on these application.
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Hanak, Dawid P., and Vasilije Manovic. "Linking renewables and fossil fuels with carbon capture via energy storage for a sustainable energy future." Frontiers of Chemical Science and Engineering 14, no. 3 (December 19, 2019): 453–59. http://dx.doi.org/10.1007/s11705-019-1892-2.
Повний текст джерелаАнотація:
AbstractRenewable energy sources and low-carbon power generation systems with carbon capture and storage (CCS) are expected to be key contributors towards the decarbonisation of the energy sector and to ensure sustainable energy supply in the future. However, the variable nature of wind and solar power generation systems may affect the operation of the electricity system grid. Deployment of energy storage is expected to increase grid stability and renewable energy utilisation. The power sector of the future, therefore, needs to seek a synergy between renewable energy sources and low-carbon fossil fuel power generation. This can be achieved via wide deployment of CCS linked with energy storage. Interestingly, recent progress in both the CCS and energy storage fields reveals that technologies such as calcium looping are technically viable and promising options in both cases. Novel integrated systems can be achieved by integrating these applications into CCS with inherent energy storage capacity, as well as linking other CCS technologies with renewable energy sources via energy storage technologies, which will maximise the profit from electricity production, mitigate efficiency and economic penalties related to CCS, and improve renewable energy utilisation.