Journal articles on the topic 'Electric power transmission network'
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1
Rahmouni, Abdelkader. "Impact of static reactive power compensator (SVC) on the power grid." WSEAS TRANSACTIONS ON ELECTRONICS 11 (June 11, 2020): 96–104. http://dx.doi.org/10.37394/232017.2020.11.12.
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The work presented in this paper is a contribution to the problem of controlling the reactive powers and the voltages in an electrical network. Among these control tools, the static reactive power compensator (SVC) has been chosen because of its simplicity of control. The SVC is among the FACTS 'Alternative Flexible Current Transmission Systems' devices that help to deal with problems encountered in the operation of electrical networks either in the distribution side or in the transport side. In this work, the SVC is used to control the reactive power and the voltage in an electric power transmission network. In order to improve its efficiency, three voltage regulation systems have been chosen in the control system of this compensator.
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Naumov, I. V., S. V. Podyachikh, D. A. Ivanov, A. N. Tretyakov, M. A. Yakupova, and E. S. Fedorinova. "The 0.38 kV electrical networks unbalancing operating modes optimization." IOP Conference Series: Earth and Environmental Science 990, no. 1 (February 1, 2022): 012069. http://dx.doi.org/10.1088/1755-1315/990/1/012069.
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Abstract The equipment 0.38 kV low-voltage electrical networks is not a satisfactory level. Such electric networks operating modes management is carrying out save energy measures and electricity supply improve efficiency in general largely allows. As a result, the electric energy supplied parameters obtaining actual nature information about to consumers through these electric networks is the developing the power transmission requirements measures basis comply. The article presents results current unbalancing modes objective studies in 0.38 kV an electrical network that feeds Irkutsk multi-storey residential building electric consumers. The analysis electric energy parameters, power quality indicators changes as well as electricity lo sses caused by the currents unbalance in the studied electric network are presented. The calculate parameters and using results of balancing device efficiency as well as its influence on the quality indicators studied and electrical energy loss in the studied electrical network are presented.
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Varentsov, V. M., A. I. Bur’Yanovatyy, and M. A. Ivanov. "Energy accounting in AC substations in case of transit currents flowing through the contact network." Vestnik of the Railway Research Institute 76, no. 5 (October 28, 2017): 294–300. http://dx.doi.org/10.21780/2223-9731-2017-76-5-294-300.
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The purpose of the work is to clarify the methodology for determining the electric power consumption of traction substations of AC electric power for the transit of external power supply. The conditions for the emergence of significant transit through traction networks of external power supply are revealed. Using the example of the Ushaped scheme for the replacement of power transmission lines, it is shown that the intersystem power fluxes along the electric power transmission lines of the external power supply exert the greatest influence on the transit currents along the traction networks. For analysis, the local and transit components of the power flow are identified and a typical section of the electrical network is considered, containing three electrical connections at voltages of 330, 110 and 27.5 kV. In this case, the most significant factor affecting transit through the traction network is the transverse component of voltage drop, since its compensation in this network is difficult. Methods for estimating the transit current of a traction network are given. An engineering technique for estimating the electric power consumption for transit by software is proposed. Authors show the necessity and possibility of using the KORTES package for estimating transit currents of the traction network caused by external power supply. The results of calculations for two sections of different railways based on the data of the Regional Dispatch Office are presented. The influence of regional and traction loads on the path of transit currents is considered. Obtained relationships and developed methodology allow estimating the electric power consumption of traction substations for the transit of the power of external power supply.
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Dolega, Waldemar. "Development of electric power network infrastructure in aspect of electric energy supply security – case study Poland." E3S Web of Conferences 84 (2019): 02002. http://dx.doi.org/10.1051/e3sconf/20198402002.
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In this paper, an analysis of issues related to development of national electric power network infrastructure in aspect of electric energy security is performed. Profile of network infrastructure in area of transmission and distribution is performed. Threats for electric energy supply security connected with transmission and distribution infrastructure are discussed. Both transmission and distribution electric power network are adapted for presently occurred typical conditions of electric energy demand and realization of internal tasks in normal conditions, but can create potential threat for electric energy supply security. In the context of forecasted increase of electric energy demand, inadequate power in National Electric Power System (NEPS) in domestic sources and available through intersystem connections, uneven location of sources and consumers at shortage of proper network transmission capacities, necessity of improvement of quality and electric energy supply reliability to final consumers and intensive development of renewable energy sources, present network infrastructure in area of transmission and distribution will be insufficient. Development of 400 and 220 kV transmission network, 110 kV distribution network especially in area of cities, MV distribution network especially in rural areas and realization of investments for improvement of export-import possibilities of NEPS will be necessary. Challenges for transmission and distribution system operators in area of network development are performed. They concern mainly investment sphere and area connected with preparation and construction of network investments.
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Chountasis, Spiros. "Communication Challenges for Electric Power Transmission Systems." International Journal of Engineering and Technologies 21 (October 25, 2021): 1–15. http://dx.doi.org/10.18052/www.scipress.com/ijet.21.1.
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Uninterrupted electric power supply and transmission is a part of critical infrastructure for any nation’s security, economy and healthcare systems. Essential requirements for operating and managing an industrial control system is the secure and instant data transfer between control centers and generation stations or substations. This paper review the general Energy Management System architecture implemented for the Hellenic Power Transmission System. It gives a possible direction to best suited SCADA system network communication by emphasizing on the security. A brief study of the communication protocols is also presented. This work focuses on the key role of telecommunication provision for critical distributed control infrastructures. Based on the relative analysis presented in this paper directions towards a secure critical infrastructures network communications are provided. Subject Classification Numbers: 68M01, 68M10, 94A05.
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Chountasis, Spiros. "Communication Challenges for Electric Power Transmission Systems." International Journal of Engineering and Technologies 21 (October 25, 2021): 1–15. http://dx.doi.org/10.56431/p-5ayzg2.
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Uninterrupted electric power supply and transmission is a part of critical infrastructure for any nation’s security, economy and healthcare systems. Essential requirements for operating and managing an industrial control system is the secure and instant data transfer between control centers and generation stations or substations. This paper review the general Energy Management System architecture implemented for the Hellenic Power Transmission System. It gives a possible direction to best suited SCADA system network communication by emphasizing on the security. A brief study of the communication protocols is also presented. This work focuses on the key role of telecommunication provision for critical distributed control infrastructures. Based on the relative analysis presented in this paper directions towards a secure critical infrastructures network communications are provided. Subject Classification Numbers: 68M01, 68M10, 94A05.
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Xia, Fei, Zong Ze Xia, and Xiao Bo Huang. "Research on Electric Power Communication Optical Fiber Transmission Network Evaluation and Optimization Method." Advanced Materials Research 1044-1045 (October 2014): 1459–62. http://dx.doi.org/10.4028/www.scientific.net/amr.1044-1045.1459.
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With the improvement of power industry modernization, electric power communication service object is no longer confined to the electric power dispatching, and the scope of services business also won the development, which requires the power system communication network is stable, reliable and efficient. The reliability of the power system optical fiber transmission network operation is an important guarantee of electric power system`s production safety and efficiency. In order to facilitate the planning and design of optical fiber transmission network management and maintenance, this paper proposed an optimization strategy based on the analysis and research of electric power communication optical fiber transmission network evaluation methods.
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Tympas, Aristotle. "Perpetually Laborious: Computing Electric Power Transmission Before The Electronic Computer." International Review of Social History 48, S11 (October 24, 2003): 73–95. http://dx.doi.org/10.1017/s0020859003001275.
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Placing Thomas Edison at the beginning of a history on electric power transmission hardly needs justification. Thomas Edison's abundant supply of pictures of himself as an inventive genius – and America's pressing demand for a myth of an ingenious inventor – combined to bestow a “Eureka” moment upon Edison's pioneering Pearl Street (New York) Station electric lighting network. But the history of the laborious computations that took place at Menlo Park and the division-of-computing labor of which Edison took advantage suggests a different view of inventive genius. The story of the computational pyramid formed by the labors of Francis R. Upton, Charles L. Clarke, and Samuel D. Mott (1879–1880) can be reconstructed from the existing literature. In his reminiscences from Menlo Park, Edison's employee, Francis Jehl, detailed how Edison thought of constructing a miniaturized network to be used as a computer of the actual network. Knowing that constructing, maintaining, and using the miniature network required a considerable amount of skilled labor, Edison decided to hire an employee for it, Dr Herman Claudius. Edison enthusiastically welcomed Claudius to perform a type of computing work “requiring nerve and super abundance of patience and knowledge”. Jehl remembered that the labor of constructing a miniature network of conductors, “all in proportion, to show Mr Edison what he would have to install in New York City in connection with the Pearl Street Station” was “gigantic”. Following the pattern of the Pearl Street Station electric lighting network, several similar networks were built in the early 1880s. In response, Edison's labor pyramid was enlarged by giving Claudius an assistant, Hermann Lemp, who performed the monotonous task of constructing the new miniature networks, which Edison needed for computation. Inconvenient as it might be for those who assume that technological change is the product of inventive genius, electrification was, from the beginning, laboriously computed; it was not, like Athena, a deity that leapt from a godly head.
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Bent, Russell, Alan Berscheid, and G. Loren Toole. "Transmission Network Expansion Planning with Simulation Optimization." Proceedings of the AAAI Conference on Artificial Intelligence 24, no. 1 (July 3, 2010): 21–26. http://dx.doi.org/10.1609/aaai.v24i1.7540.
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Within the electric power literature the transmission expansion planning problem (TNEP) refers to the problem of how to upgrade an electric power network to meet future demands. As this problem is a complex, non-linear, and non-convex optimization problem, researchers have traditionally focused on approximate models of power flows. Existing approaches are often tightly coupled to the approximation choice. Until recently, these approximations have produced results that are straight-forward to adapt to the more complex (real) problem. However, the power grid is evolving towards a state where the adaptations are no longer easy (e.g. large amounts of limited control, renewable generation) that necessitates new optimization techniques. In this paper, we propose a local search variation of the powerful Limited Discrepancy Search (LDLS) that encapsulates the complexity of power flows in a black box that may be queried for information about the quality of a proposed expansion. This allows the development of a new optimization algorithm that is independent of the underlying power model.
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Naumov, Igor, Sergey Podyachikh, Marina Polkovskaya, and Aleksandr Tretyakov. "Green technologies use in the smart grid construction in rural power supply systems." BIO Web of Conferences 42 (2022): 03006. http://dx.doi.org/10.1051/bioconf/20224203006.
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The article considers the using intelligent controls possibility in low-voltage rural electric networks to minimize the unbalance modes consequences. The proposed technology includes the digital data transmission compilation on the electrical energy parameters with a new balancing technical means the electrical network operating mode. Digital feedback is provided for changes the balancing device (BD) parameters by the unbalancing power consumption changing level. Based on the developed methods compilation, software for calculating unbalancing modes has been created, which makes it possible to assess the currents and voltages unbalancing effect on the power quality and its additional losses change. The “green” technology proposed version, which increases the economic and the electric energy environmental safety use in the rural electric power industry, contains a new constructive solution for the balancing device implementation. The proposed technology was tested on the measurement data basis in existing electrical networks. Based on the MALAB technologies use, changes studied indicators visualization in the before and after BD integration in the electrical network was carried out and its analysis was makes. Used on the “neural networks” MALAB technology, a preventive assessment of the unbalancing power consumption events development in the investigated operating electrical network is presented, as well as the proposed technology effectiveness assessment was carried out.
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Ferrer, Miguel, Manuela De Lucas, Elena Hinojosa, and Virginia Morandini. "Transporting Biodiversity Using Transmission Power Lines as Stepping-Stones?" Diversity 12, no. 11 (November 23, 2020): 439. http://dx.doi.org/10.3390/d12110439.
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The most common ecological response to climate change is the shifts in species distribution ranges. Nevertheless, landscape fragmentation compromises the ability of limited dispersal species to move following these climate changes. Building connected environments that enable species to track climate changes is an ultimate goal for biodiversity conservation. Here, we conducted an experiment to determine if electric power transmission lines could be transformed in a continental network of biodiversity reserves for small animals. We analysed if the management of the habitat located inside the base of the transmission electric towers (providing refuge and planting seedlings of native shrub) allowed to increase local richness of target species (i.e., small mammals and some invertebrates’ groups). Our results confirmed that by modifying the base of the electric transmission towers we were able to increase density and diversity of several species of invertebrates and small mammals as well as number of birds and bird species, increasing local biodiversity. We suggest that modifying the base of the electric towers would potentially facilitate the connection of fragmented populations. This idea would be easily applicable in any transmission line network anywhere around the world, making it possible for the first time to build up continental scale networks of connectivity.
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Hogan, William W. "Contract networks for electric power transmission." Journal of Regulatory Economics 4, no. 3 (September 1992): 211–42. http://dx.doi.org/10.1007/bf00133621.
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Gracheva, E. I., and O. V. Naumov. "Application of fuzzy regression analysis method for determination of electric power losses in intrafactory power supply networks." Safety and Reliability of Power Industry 11, no. 4 (January 21, 2019): 325–31. http://dx.doi.org/10.24223/1999-5555-2018-11-4-325-331.
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One of the main objectives of the development of modern industry in Russia, along with an increase in the absolute volumes of electric power (EP) production, is to strengthen control over its more rational use. Saving EP and reducing the cost of its transmission along power distribution networks is of great importance for the country's energy sector. In terms of their physical nature, in terms of production, transmission and consumption, EP losses are no different from EP served to consumers. Therefore, the assessment of power losses in electrical networks is based on the same economic principles as the assessment of energy served to consumers. EP losses have a significant impact on the technical and economic parameters of the network, since the cost of losses is included in the estimated cost (reduced costs) and cost price (annual operating costs) of EP transmission. The cost component of losses in the cost of EP transmission has a large proportion. The article presents the results of research on the possibility of application of fuzzy regression analysis for problems of assessment and prediction of electric power losses in intrafactory networks. Initial information on the network is uncertain to some extent, which complicates application of traditional methods. The calculation is presented for conventional and fuzzy regression models, along with estimation of error of these models. The relevance of application of fuzzy regression analysis methods is determined by the difficulty of obtaining reliable information about the circuit and regime parameters of intrafactory networks, the probabilistic nature of change of the modes, as well as a whole complex of affecting factors, which are generally challenging for quantitative assessment. Advantages of application of fuzzy regression analysis consist in obtaining confidence intervals of required variables (value of electric power losses) for schemes of networks with uncertain initial information on their parameters, which is characteristic of intrafactory power supply systems, and enables to consider dynamics of their variation.
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Khlebnikov, Vladimir, Nicholay Tsygulev, Kirill Smagin, Razmik Galstyan, and Dmitriy Zhirovov. "Control of Digitalized Distribution Electric Network According to the Criterion of Minimum Loss of Electric Power Transmission." Известия высших учебных заведений. Электромеханика 64, no. 2 (2021): 71–77. http://dx.doi.org/10.17213/0136-3360-2021-2-71-77.
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At present, the world energy industry is focused on creating intelligent distribution electric networks with management on the energy Internet platform. To solve this problem, a model circuit of an intelligent distribution radial electric network was developed, for controlling parameters in normal and post-accident modes of which, it is proposed to use regulators of transformation coefficients of network transformers and fastacting compensating devices for smooth control of reactive load power. Mathematical model of proposed network and target function are formed, minimization of which ensures minimum losses of electric power transport. Algorithms for control of parameters of operating modes in normal and post-accident modes have been developed. The implementation of the proposed algorithms ensures the operation of the network with minimal losses of electricity transport
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Bolshev, V. E., A. V. Vinogradov, A. V. Vinogradova, A. V. Bukreev, and S. R. Khasanov. "Study of statistical data on the composition of electric distribution networks on the example of a Kaluga region district." E3S Web of Conferences 220 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202022001005.
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Sustainable operation of the power grid complex is impossible without reliable and high-quality operation of 10/0.4 kV electrical distribution networks, which are the final link in the system for providing consumers with electric energy and are in direct interaction with a specific consumer. The study of statistical information on the composition of distribution networks makes it possible to draw conclusions about electrical network state, to implement recommendations for their development and to compare distribution electrical networks in different regions. This information is especially relevant for analyzing the reliability of power supply to consumers connected to the considered electrical distribution networks. Such indicators of network structure as the length of electric transmission lines of different voltages and power transmission schemes are studied. It also analyzes the number of damages in networks, the causes of these damages, data on the time of planned and emergency outages. This paper considers the structure of 10/0.4 kV electrical distribution networks located on the territory of one of the districts of the Kaluga region. The sample for distribution networks was: 1190 overhead transmission lines and 536 transformer substations. Consumers in the district are 21671 subscribers of individuals and 1986 subscribers of legal entities, that is, a total of 23657 metering points. On the lines of 0.4 kV and 10 kV, the percentage of their isolated design was revealed. The share of single-transformer and two-transformer versions of transformer substations is analyzed.
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N. S., Okorie. "Optimization of Energy Efficiency for Electric Power Distribution System Losses." International Journal for Research in Applied Science and Engineering Technology 9, no. 12 (December 31, 2021): 934–40. http://dx.doi.org/10.22214/ijraset.2021.39074.
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Abstract: This study evaluated the existing electric power network of Mile 2 Diobu zone, Port Harcourt distribution network which consists of four (4) 11kV distribution feeders namely; Ojoto, Nsukka, Udi and Silverbird. This work considered Ojoto and Nsukka Street distribution network for improved power quality. The three (3) 33/11kv injection substations are fed from 165 MVA transmission station (PH Town) at Amadi junction by Nzimiro. Collection and analysis of data collected from the injection substations that supply electricity to mile 2 Diobu, Port Harcourt was the first consideration. The distribution network was modeled in Electrical Transient Analyzer Program (ETAP) using Newton-Raphson Load Flow equations. The simulation result of the existing condition network shows that the network has low voltage profile problem on Nsukka network and overloading of distribution transformers on Ojoto networks. The following optimization techniques are applied: up-gradation of distribution transformers, and transformer load tap changer to improve the distribution network for Mile 2 Diobu, Port Harcourt electrical power network. The simulation result of the improved distribution network for Mile 2 Diobu, Port Harcourt power network shows that the voltage profile Nsukka network has improved within the statutory limit which is between 95.0 -105.0% and the loading of the distribution transformers on Ojoto and Nsukka networks are all below 70% required capacity. Keywords: Optimization, Energy Efficiency Distribution
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Yuldoshev, Isroil, Sanjar Shoguchkarov, Tulqin Jamolov, and Shakhnoza Rustamova. "Features of operation of the grid connected photovoltaic power station with a capacity of 10 kW." E3S Web of Conferences 216 (2020): 01172. http://dx.doi.org/10.1051/e3sconf/202021601172.
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Photovoltaic power station (PPS) operating function (without redundancy) with a nominal capacity of 10 kW connected to the low voltage electrical network established by "Zhejiang Chint Electrics Co Ltd" (PRC) under Tashkent conditions is defined. Operation parameters and characteristics of the PPS and parameters at the output of the network inverter are given. The deviations of voltage of each phase from the standard nominal voltage at the point of electric network transmission are studied. The analysis of the results of the evaluation of the power generation of the PPS for the conditions of clear weather and clear cloudiness was carried out. According to the monitoring data for the winter period is 2211,5 kW·h. The problems of PPS connected to the low-voltage network, connected to the loss of electric power with the account of influence of external factors and reliability of stable voltage and frequency in a permissible range are revealed.
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Hao, Zi Han, and Hai Bao. "A Matrix Method for Describing the Power Transmission of Electric Network." Advanced Materials Research 614-615 (December 2012): 1651–55. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1651.
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Traditional power flow calculation can only supply the information of the conventional electric parameters, such as node voltage, branch current, power, etc. The transmission of power which is injected into the network by each power source, including power supply paths, power belongs, relationship among the power injected into each nodes, cannot be given. To solve this problem, this paper using the theory of the physical distribution of power network’s energy, proposes a matrix method for describing the power transmission, expresses the value and supply paths of the power from each single source in power network with the analytic method.
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Liu, L. H. "Design and Analysis of a Power Transmission Network Model of Electric Vehicle." Key Engineering Materials 693 (May 2016): 45–52. http://dx.doi.org/10.4028/www.scientific.net/kem.693.45.
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Fossil energy is increasing depletion, renewable energy sources plays an important role in our life and Vehicle-to-Grid (V2G) is proved to be feasible. Electric Vehicles (EVs) can not only store energy, but also can be used as a medium between the battery energy stored in EVs and the power grid through Vehicle-to-Grid (V2G). And then, the energy in the batteries of electric vehicles can move with EVs. This paper introduces an energy distribution network, which is consisting of EVs, charge stations and renewable energy sources. After analyzing the characteristics of energy distribution network, we introduce a new commercial operation mode called mobile electrical grid, which is compared with the integrated grids. To calculate the life cycle energy loss for this novel operation mode, a mathematical model is developed, and then what we have deduced is demonstrated to be a lasso optimization problem with linear constraints, which is convex.
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Naumov, I. V., and D. N. Karamov. "On damage rate of overhead power transmission lines in power supply systems." Safety and Reliability of Power Industry 14, no. 2 (July 28, 2021): 92–99. http://dx.doi.org/10.24223/1999-5555-2021-14-2-92-99.
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The purpose of the article is to analyze the damage rate of overhead power transmission lines (OPL) in medium-voltage electrical distribution networks of the Irkutsk region. The established International Indices that determine the level of reliability of the functioning of electric networks are considered, and information on the compliance of the condition of electric networks in Russia with these indices is analyzed. Analytical information on the damage rate of elements of these networks and their causes in Europe, America, and Russia is presented. The emphasis is placed on the fact that the most common damage is characteristic of overhead power lines, especially 6–10 kV lines. As an object of research, two branches of the Irkutsk electric grid company (IEC) were taken, one of which provides electricity to rural consumers, the other — mainly to consumers residing in the territory of the city Irkutsk. The characteristics of these electric networks, their territorial location and basic technical data are presented. To conduct analytical monitoring of the level of reliability of overhead power transmission lines, logs of disconnection of the Eastern and Southern electric networks of the IEC over a long-term period were used. On the basis of this information, tables of failures and their consequences in the studied electrical networks were compiled for monthly average data over the period under examination for various causes of damage. To plot time diagrams of the parameters under examination, computer programs were compiled in the Matlab system, the use of which made it possible to obtain visualization of changes in failures for various reasons for the electrical networks under consideration. The information on the time of power supply interruptions in these networks, as well as the amount of electricity underutilized by consumers during these interruptions and its cost are analyzed. It is shown that in the electric networks under consideration, most of the power failures are related to the territorial dispersion of these networks, and the low level of equipment controls and insufficient qualification of operating personnel, as evidenced by the significant number of failures for unknown reasons. Besides, a significant part of the failures is due to damage to the overhead line wires, switching equipment and the effect of wind load. Recommendations for improving the condition of power transmission lines and a number of measures aimed at improving the level of reliability of power supply are presented.
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Hui, Li. "Optimum Design Algorithms and Simulation Analysis of Power Transmission Network Based on EPOCHS." Applied Mechanics and Materials 716-717 (December 2014): 1288–92. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1288.
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This paper studies a new type of power transmission network and power communication transmission technology. First, the working principle and network topology form of power optical transmission network have been presented in this paper, the power budget of the optical transmission model has been given through the loss of optical system and dispersion limit theory. Then the power transmission network and power communication transmission have been simulated through EPOCHS software simulation software, which based on the design aspects of CP transport port, transport protocol and transmission signal, the simulation parameters has been set according to the transmission mathematical model, and the security and efficiency of power transmission network has been proved through the fault signal diagnosis and signal characteristics of delay and jitter. The result of simulation shows that power transmission network power transmission have shorter delay and less jitter, which provides the reliable theory basis for the development of electric power communication network and complex network.
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Huang, Yue Hua. "Power Transmission and Transformation Project Using Analytic Network Process." Applied Mechanics and Materials 214 (November 2012): 430–35. http://dx.doi.org/10.4028/www.scientific.net/amm.214.430.
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Transmission and transformation is an important part of National Electric Power building, Based on the reality of our country, this paper proposed a comprehensive evaluation model, refer to the entire lifecycle environmental friendly, sophisticated products, independent research, cost optimization of management, etc, in order to supply reference for the decision-makers of power transmission and transformation projects.
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Yang, Yi, Jing Xian Lv, Shi Wen Wang, Pei Lin Cai, and Wen Cui Li. "Applicability Analysis of PTN Technology in Henan Electric Power Transmission Network." Applied Mechanics and Materials 644-650 (September 2014): 3667–70. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.3667.
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Power communication network is an important part of an intelligent grid. This paper focuses on problems in Henan electric power transmission network, analyzes business requirements, technical routes and implementation of programmed areas, and summarizes the technical advantages of PTN technology in the standard process. Application of PTN technology in Henan electric power transmission network can solve the problem of surging data service. Fully taking into account the current and long term investment benefits, its comprehensive benefit is greater than a comprehensive upgrade of SDH equipment.
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Geng, Junqi, Xinghua Liu, Xianming Sun, Peng Sun, Yan Liu, and Xinye Gao. "Fast Screening Method for an Important Transmission Line in Electrical Power System Uniting Internet Thinking and Physical Features." Mobile Information Systems 2022 (March 29, 2022): 1–11. http://dx.doi.org/10.1155/2022/9670009.
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In the electrical power system, a few transmission lines may have cascading failures and even lead to severe blackout accidents. In order to further prevent the electrical power system from cascading failures and being enlightened by Internet thinking, based on the complex network theory, this paper proposes the TL-SALSA (transmission line-stochastic approach for link structure analysis) algorithm combining Internet thinking and physical characteristics of the electrical power system for screening the important transmission lines. The TL-SALSA algorithm not only retains the low-computational complexity advantage of the SALSA (stochastic approach for link structure analysis) algorithm but considers the impact relational among transmission lines and the electrical power system operation mode. The IEEE 39-bus power system and IEEE 118-bus power system are simulated and compared with the electric betweenness algorithm, and the results further evidence the effectiveness of the TL-SALSA algorithm. The results also show that the TL-SALSA algorithm can improve the screening efficiency by nearly three orders of magnitude compared with the electric betweenness algorithm, which proves the potential of the TL-SALSLA algorithm for screening important transmission lines in large-scale electrical power systems.
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Marei, Marwa M., and Manal H. Nawer. "Power losses reduction of power transmission network using optimal location of low-level generation." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 6 (December 1, 2020): 5586. http://dx.doi.org/10.11591/ijece.v10i6.pp5586-5591.
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Due to the growth of demand for electric power, electric power loss reduction takes great attention for the power utility. In this paper, a low-level generation or Distributed Generation (DG) has been used for transmission power losses reduction. Karbala city transmission network (which is the case study) has been represented by using MATLAB m-file to study the load flow and the power loss for it. The paper proposed the Particle Swarm Optimization (PSO) technique in order to find the optimal number and allocation of DG with the objective to decrease power losses as possible. The results show the effect of the optimal allocation of DG on power loss reduction.
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Umale, Virendra, and Sanjay Warkad. "Power quality based optimal nodal pricing in tradable electricity market." International Journal of Engineering & Technology 7, no. 2.8 (March 19, 2018): 692. http://dx.doi.org/10.14419/ijet.v7i2.8.10560.
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Optimal Power Flow method described the nodal transmission pricing into different related factors, such as congestion,generation, power and electric load limitations. These detailsof each bus transmission prices can be used for to improve the proper usage of transmission congestion and power grid and to get reasonable transmission pricing for power structure. The proposed methodology is demonstrated on IEEE57 bus system and Maharashtra utility electric 400/765kv network.
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Khan, M. Y. A., U. Khalil, H. Khan, A. Uddin, and S. Ahmed. "Power Flow Control by Unified Power Flow Controller." Engineering, Technology & Applied Science Research 9, no. 2 (April 10, 2019): 3900–3904. http://dx.doi.org/10.48084/etasr.2587.
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The demand for electricity is increasing day by day and we have to produce more electrical energy to meet the load demands. Most of the experts prefer to extend the existing electrical networks over building the new network with greater costs. In this paper, the implementation of the flexible AC transmission systems (FACTS) devices in a simple electrical network is described. FACTS devices enhance power transfer capacity of the line without laying out new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. Moreover, this paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.
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Gonzalez-Castellanos, Alvaro, Priyanko Guha Thakurta, and Aldo Bischi. "Congestion management via increasing integration of electric and thermal energy infrastructures." E3S Web of Conferences 238 (2021): 05005. http://dx.doi.org/10.1051/e3sconf/202123805005.
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Congestion caused in the electrical network due to renewable generation can be effectively managed by integrating electric and thermal infrastructures, the latter being represented by large scale District Heating (DH) networks, often fed by large combined heat and power (CHP) plants. The CHP plants could further improve the profit margin of district heating multi-utilities by selling electricity in the power market by adjusting the ratio between generated heat and power. The latter is possible only for certain CHP plants, which allow decoupling the two commodities generation, namely the ones provided by two independent variables (degrees-of-freedom) or by integrating them with thermal energy storage and Power-to-Heat (P2H) units. CHP units can, therefore, help in the congestion management of the electricity network. A detailed mixed-integer linear programming (MILP) optimization model is introduced for solving the network-constrained unit commitment of integrated electric and thermal infrastructures. The developed model contains a detailed characterization of the useful effects of CHP units, i.e., heat and power, as a function of one and two independent variables. A lossless DC flow approximation models the electricity transmission network. The district heating model includes the use of gas boilers, electric boilers, and thermal energy storage. The conducted studies on IEEE 24 bus system highlight the importance of a comprehensive analysis of multi-energy systems to harness the flexibility derived from the joint operation of electric and heat sectors and managing congestion in the electrical network.
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Chen, Jia Yu, Jia Tao, Jia Tao, Limin Huo, and Limin Huo. "Study on Communication Methods for Electric Power High-voltage Equipment Monitoring System." International Journal of Online Engineering (iJOE) 14, no. 02 (February 28, 2018): 181. http://dx.doi.org/10.3991/ijoe.v14i02.8212.
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Real-time monitoring of high-voltage equipment in substations is beneficial for early detection of faults. The use of wireless sensor networks to build monitoring system is an effective way, but the data collection is a difficult task. The author introduces a real-time monitoring system based on ZIGBEE and mobile communication technology. The system includes multiple monitoring points and terminal platforms. Each monitoring point consists of a number of sensor nodes to form a ZIGBEE network, detecting relevant parameters, coordinator node data collected one by one, known as linear transmission, and finally to the monitoring platform through the mobile communication network. This paper presents a fusion algorithm for monitoring cell data acquisition to reduce the amount of data uploaded to the base station. In addition, multi-hop routing algorithm based on opportunistic routing is proposed to balance network energy and improve network transmission rate and efficiency.
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Li, Fang Yuan, Hui Xia Ding, and He Lang. "Power OTN Communications Transmission Performance Simulation Calculation." Applied Mechanics and Materials 543-547 (March 2014): 2488–91. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.2488.
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This paper briefly introduced the main linear damages in the network layer of electric power Optical Transmission Network which contains fiber loss, chromatic dispersion and polarization mode dispersion. Based on the engineering practice in the application of power system, this paper studied the loss in the optical fiber cable line. The paper also studied chromatic dispersion and polarization mode dispersion. The calculation models were concluded and used for simulation verification. Each model can be used to power OTN engineering design.
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Cai, Wen Bin, Kang Du, Xing Peng, and Hua Yang Liu. "Study on Pumping Units with Wind Power Generation Complementary Power Supply System." Advanced Materials Research 361-363 (October 2011): 479–82. http://dx.doi.org/10.4028/www.scientific.net/amr.361-363.479.
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The wind power generation pumping unit has environmental protection and the energy-saving function with wind power generation complementary power supply system. Based on the calculation of the pumping power consumption during the oil production, the essential wind-power generation electric quantity for pumping equipment runs stable was analyzed, wind-electricity and electric network complementary energy transmission and control circuit were designed, When the wind speed changes, by the energy transmission and control circuit related parameters and taking the historical meteorological statistics of the corresponding period as the comparison reference, the system can control wind power generation and the battery charge and discharge flexibly to ensure the equipment runs stable, which lays a firm foundation for the wide application of the off-grid wind power. The economic analysis shows that the wind-electricity and electric network complementary pumping machine has good economic efficiency and application prospect in oilfield.
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Savenko, A. E., and P. S. Savenko. "Use and improvement of automatic systems for control of reduced electric power sources in local electric networks." Power engineering: research, equipment, technology 24, no. 4 (August 17, 2022): 105–15. http://dx.doi.org/10.30724/1998-9903-2022-24-4-105-115.
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THE PURPOSE. Consider the use of automatic systems for controlling reduced sources of electricity in local electrical networks. Explore the possibilities of expanding the functions of such automatic control systems to improve the quality of electricity in terms of eliminating power exchange and common-mode oscillations. METHODS. Studies of diesel generator units operating in parallel in local electrical networks were carried out using mathematical modeling methods. The mathematical model takes into account the presence of the "backlash" phenomenon in the speed control loops. RESULTS. The expediency of using batteries, rectifier and inverter converters in local electrical networks is noted. Experimental studies in the local electrical network revealed the existence of power exchange and common-mode oscillations. Mathematical modeling also confirmed the occurrence of power exchange oscillations in the local electrical network due to the “backlash” in the frequency controller circuit, as well as power common-mode oscillations due to the difference in the frequency controller transmission coefficients for diesel generator units operating in parallel. A map of the dependence of the amplitude of power exchange oscillations on backlash gaps and a map of the dependence of the amplitude of power common-mode oscillations on the values of the gain of the frequency controller are obtained. CONCLUSION. The possibility of eliminating power exchange and common-mode oscillations by reducing and ensuring equality of the transmission coefficients of frequency controllers has been established. Adding the function of eliminating power exchange and common-mode oscillations to automatic control systems for reduced sources of electricity in local electrical networks ensures that the required quality of electricity is maintained in quasi-steady operating modes.
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Joskow, Paul L., and Jean Tirole. "Transmission Rights and Market Power on Electric Power Networks." RAND Journal of Economics 31, no. 3 (2000): 450. http://dx.doi.org/10.2307/2600996.
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Prosser, J., J. Selinsky, H. Kwatny, and M. Kam. "Supervisory control of electric power transmission networks." IEEE Transactions on Power Systems 10, no. 2 (May 1995): 1104–10. http://dx.doi.org/10.1109/59.387957.
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S., SHEVCHENKO, DANYLCHENKO D.O., and KUZNETSOV D.S. "USE OF SOFTWARE FOR IMPROVING THE EFFICIENCY OF MODELING ENERGY NETWORKS." Journal of Electrical and power engineering 26, no. 4 (May 24, 2022): 17–28. http://dx.doi.org/10.31474/2074-2630-2022-1-17-28.
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The article is devoted to the topical issue of power grid modeling. The article discusses positive and negative features of simulation programs. Particular attention is paid to the principles of the programs. Such programs as PSS®SINCAL from Siemens; ETAP from Operation Technology and PowerFactory from DIgSILENT GmbH are considered in the article. The PSS®SINCAL software specializes in designing networks from low to ultra-high voltage classes, in symmetrical and non-symmetrical modes of operation, takes into account the installation possibilities of compensating devices and gives recommendations for their installation locations. Basic models enabling mode calculations and shortcircuit calculations as well as simulation of electromagnetic transients are used as the basis of the PSS®SINCAL software. The basic modules include steady state calculations, calculations of short circuit currents, harmonics, system stability and electromagnetic transients. Particular attention is paid to the optimization and planning module, namely reactive power optimization. The module of reactive power optimization in PSS®SINCAL offers methods of optimizing existing equipment by finding the best switching points for reactive power compensation. ETAP software specializes in electrical network and power transmission design. ETAP Grid™ connects network design with detailed substation models, SCADA systems, and real-time transmission network management. This paper covers only 2 modules of ETAP software, namely transmission and distribution modules. PowerFactory captures the full range of functionality from standard features to highly sophisticated and advanced applications, including wind power, distributed generation, real-time modeling, and performance monitoring for testing of surveillance systems. This article reviews only 2 modules of the PowerFactory software, namely the electrical power transmission and distribution modules. The paper reviews the programs and concludes that Siemens' PSS®SINCAL software would be the most successful solution for modeling electric grids and accounting for the effects of compensating devices on voltage levels in electric grids.
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Panfilov, Alexander, Alexander Vinogradov, Alina Vinogradova, Vadim Bolshev, Zumeira Shakurova, and Elena Zaugolnikova. "Challenges and methods of monitoring the occurrence of unsanctioned voltage in the power grid." E3S Web of Conferences 288 (2021): 01111. http://dx.doi.org/10.1051/e3sconf/202128801111.
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The review of sources dedicated to the issues of monitoring in electric networks made in the article showed that the works of many scientists are aimed at developing methods, technical means, systems for monitoring current and voltage in various operation modes of power grids. The main objectives of monitoring are identified, it is shown that monitoring of parameters in the network operation modes provides observability of the network, which, in turn, allows to make timely decisions about switching in the network, regulating the parameters of the network operation modes. The relevance of monitoring for detecting cases of unauthorized voltage in the 0.4 kV power networks is shown. Similar cases lead to the risk of electric shock to people, increasing the risk of operating electrical networks. Identification of the occurrence of unauthorized voltage in the 0.4 kV network provides ways to prevent its transformation at substations of 10/0. 4 kV to a voltage of 10 kV. Therefore, it is relevant to develop methods for detecting unauthorized voltage in the 0.4 kV electric system. The methodological principles and one of the developed methods for monitoring the occurrence of unauthorized voltage in power transmission lines of 0.4 kV and blocking the reverse transformation on substations 10/0.4 kV, as well as the device for its implementation, are shown.
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Privalov, Andrey, Igor Kotenko, Igor Saenko, Natalya Evglevskaya, and Daniil Titov. "Evaluating the Functioning Quality of Data Transmission Networks in the Context of Cyberattacks." Energies 14, no. 16 (August 5, 2021): 4755. http://dx.doi.org/10.3390/en14164755.
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Cyberattacks against the elements of technological data transmission networks represent a rather significant threat of disrupting the management of regional electric power complexes. Therefore, evaluating the functioning quality of data transmission networks in the context of cyberattacks is an important task that helps to make the right decisions on the telecommunication support of electric power systems. The known models and methods for solving this problem have limited application areas determined by the admissible packet distribution laws. The paper proposes a new method for evaluating the quality of the functioning of data transmission networks, based on modeling the process of functioning of data transmission networks in the form of a stochastic network. The proposed method removes restrictions on the form of the initial distributions and makes the assumptions about the exponential distribution of the expected time and packet servicing in modern technological data transmission networks unnecessary. The method gives the possibility to evaluate the quality of the network functioning in the context of cyberattacks for stationary Poisson transmission and self-similar traffic, represented by Pareto and Weibul flows models. The obtained evaluation results are in good agreement with the data represented in previously published papers.
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Akpojedje, France Onoabedje, and E. C. Mormah. "Transmission System and Rural Electrification Scheme in Nigeria: Issues, Challenges, Constraints and Way forward." Journal of Advances in Science and Engineering 2, no. 2 (December 2, 2019): 9–28. http://dx.doi.org/10.37121/jase.v2i2.60.
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This paper x-rayed the transmission system and rural electrification scheme in Nigeria. The electric power transmission network and rural electrification scheme were critically reviewed in terms of issues, challenges, constraints, roles and current state of the power systems to identify their areas of strength and shortcomings in the Nigeria power sector. The paper further proposes the way forward to enhance the performance of the Nigeria’s electric power transmission system and rural electrification scheme.
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Pirjola, Risto J. "On the flow of geomagnetically induced currents in an electric power transmission network." Canadian Journal of Physics 88, no. 5 (May 2010): 357–63. http://dx.doi.org/10.1139/p10-028.
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Geomagnetically induced currents (GICs) in conductor networks are among the ground-level effects of space weather. GICs are a possible source of problems to the system. Today, electric power transmission grids are the most important concern regarding GICs, which may in the worst cases lead to blackouts in large areas and permanent damage to transformers. The evaluation of GIC risks and the design of possible countermeasures require estimation of expected GIC magnitudes in transformers. This can be achieved by model calculations supplemented by GIC recordings at some sites. Although in principle GICs can flow all over a large galvanically-connected power grid, which should thus be included as a whole in a GIC calculation, the network must usually be restricted somehow in practical computations of GICs. By using a power grid test model, this paper provides a systematic numerical investigation showing that GICs do not flow over very long distances in a power grid, which is a good result and justifies the neglect of the parts of the network that lie far away from the area of primary interest. Besides practical significance in electric power engineering, studies of GICs can be used for space physics and geophysical research as well. It is also important to understand the features of the flow pattern of GICs in a network.
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Li, Bocheng, Jie Niu, Zhiqiang He, Lanlan Liu, Zhenyu Wang, Shasha Peng, and Guiling Dong. "Development of line abnormal diagnosis system for overhead transmission lines." Journal of Physics: Conference Series 2351, no. 1 (October 1, 2022): 012038. http://dx.doi.org/10.1088/1742-6596/2351/1/012038.
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Overhead transmission line is the main way of power transmission, and its safe and stable operation is particularly important. Due to the complex network, transmission distance, large voltage grade serious problems such as frequent failure, this paper breaks through the transmission line fault location of traditional single, set induction electric wires, fault location, line insulation monitoring technology at an organic whole, developed of the transmission line abnormal diagnosis system, and realized the electrical characteristics of overhead transmission line multidimensional awareness. In this way, it can provide accurate information for maintenance personnel and ensure the safe and stable operation of the transmission network.
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Khalil, Umair, Muhammad Yousaf Ali Khan, Umer Amir Khan, and Shahid Atiq. "Power Flow Control by Unified Power Flow Controller." April 2020 39, no. 2 (April 1, 2020): 257–66. http://dx.doi.org/10.22581/muet1982.2002.04.
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The demand of energy usage is increasing rapidly and to meet the energy requirements, best possible transmission systems should be adopted to avoid energy losses in our transmission systems. In Pakistan’s WAPDA (Water & Power Development Authority) system, the rapid increase in load and less generation capacity has increased load shedding thought the country. The government has planned to increase the generation capacity but the supply companies are facing line load-ability, environmental constraints, power limitations problems etc. Most of the supply companies prefer to extend the existing electrical networks instead of building new network to reduce financial burdens. In this paper the implementation of the FACTS (Flexible AC Transmission Systems) Devices in an electrical network is described. The FACTS devices enhance power transfer capacity of the line without adding new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. The control of power flow, reactive power compensation and voltage control are the main capabilities of FACTS devices. This paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.
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Wu, Yu-Chi, Wen-Liang Huang, Yi-Fan Hsu, Sheng-Ching Wang, Jin-Yuan Lin, and Meng-Jen Chen. "Computational Framework for Optimal Carbon Taxes Based on Electric Supply Chain Considering Transmission Constraints and Losses." Mathematical Problems in Engineering 2015 (2015): 1–15. http://dx.doi.org/10.1155/2015/395973.
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A modeling and computational framework is presented for the determination of optimal carbon taxes that apply to electric power plants in the context of electric power supply chain with consideration of transmission constraints and losses. In order to achieve this goal, a generalized electric power supply chain network equilibrium model is used. Under deregulation, there are several players in electrical market: generation companies, power suppliers, transmission service providers, and consumers. Each player in this model tries to maximize its own profit and competes with others in a noncooperative manner. The Nash equilibrium conditions of these players in this model form a finite-dimensional variational inequality problem (VIP). By solving this VIP via an extragradient method based on an interior point algorithm, the optimal carbon taxes of power plants can be determined. Numerical examples are provided to analyze the results of the presented modeling.
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Kolosok, Irina, Elena Korkina, and Alexander Tikhonov. "Application of FACTS devices for flexibility control of transmission networks." E3S Web of Conferences 209 (2020): 02016. http://dx.doi.org/10.1051/e3sconf/202020902016.
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Maintenance of power balance at each time moment in every node and in the electric power system as a whole is a mandatory condition for supplying the electric power of required quality (frequency, voltage levels). Property of the system to be considered as its ability to control power balance is referred to as flexibility. Technologies for operating conditions control or systems services are an efficient means of regulating the flexibility of HV transmission networks in the cycle of on-line and anti-emergency control. Present-day FACTS of the second generation based on power electronics whose control systems ensure high efficiency of control and stabilization are the most perspective means of flexibility regulating and control. The paper considers potentials of using those devices for regulating the flexibility of 500/200 kV network that is a section of a real EPS. Calculations were performed in the simulation experiment and were based on real telemetry measurements using the State Estimation Software. The results of the studies have showed that substitution of the first-generation FACTS devices by the controlled second-generation FACTS devices and installation of new present-day FACTS allows notable enhancement of HV electric networks controllability and ensures the required level of networks flexibility.
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Li, Hong Jiang, and Hao Lan Zhang. "Power Line Carrier Communication Channel Model Applied to Shipboard Electric Network." Applied Mechanics and Materials 385-386 (August 2013): 1164–70. http://dx.doi.org/10.4028/www.scientific.net/amm.385-386.1164.
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It is necessary to build a particular communication channel model to investigate shipboard electric network power line carrier technology. And this model must live up to characteristics of ordinary power line as well as shipboard electric network. This paper confirms the lighting network as the PLC application network in the first place, on the basis of lumped parameter transmission model, analyzes shipboard cable AC resistance, describes pulse noises of shipboard loads, and builds the shipboard PLC channel model. Comparing with the PLC multipath model of large land electric network, this channel model also reflects characteristics of high frequency time-varying selective fading and low frequency smooth fading, at the same time, lives up to shipboard electric network characteristics.
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Lan, Yu, Xin Lu, Ye Shen He, and Yun Feng Li. "Micro-Power Wireless CSMA/CA Algorithm Improvement and Simulation Based on the Electric Power Business." Applied Mechanics and Materials 494-495 (February 2014): 1640–46. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1640.
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In the micro-power wireless transmission of the electric system, positions among modes are relatively fixed, power business data is reported at specific time points, and time distribution presents great differences. Key technologies of IEEE802.15.4 MAC layer protocol is expounded, shortages of collision detection and CSMA/CA on power business support, etc. are discussed, self-adaptive low-power consumption CSMA/CA algorithm which is more suitable for business of the electric system are designed and improved, and the algorithm goes through simulation experiment against the business characteristics of micro-power wireless network of the electric system. The simulation result demonstrates the algorithm may be greatly adapted to changes of network traffic under a relatively fixed environment of network topology on the premise of low power consumption.
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Sun, Xiaoguang, Jianyu Geng, Kai Liu, Yuanzhi Wang, and Zhipeng Wang. "Design of electric power emergency communication system based on multi-network integration." Journal of Physics: Conference Series 2083, no. 4 (November 1, 2021): 042071. http://dx.doi.org/10.1088/1742-6596/2083/4/042071.
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Abstract Natural disasters and emergencies generally pose serious threats to power facilities. Therefore, it is necessary to establish an efficient electric power emergency communication (EPEC) system. Existing systems based on a single network carrier (for example,4G, satellite, and Wi-Fi) may not meet the requirements of complex environments. We design a new EPEC system based on multi-network convergence technology by integrating the above three network carriers. It overcomes the limitations of single network carrier and improves the efficiency of power emergency communication. The test results show that the system can improve the transmission line bandwidth, automatically switch to the optimal signal network, and guarantee the security and stability of data transmission.
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Amin, Massoud, and John Stringer. "The Electric Power Grid: Today and Tomorrow." MRS Bulletin 33, no. 4 (April 2008): 399–407. http://dx.doi.org/10.1557/mrs2008.80.
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AbstractIn the coming decades, electricity's share of total global energy is expected to continue to grow, I and more intelligent processes will be introduced into the electric power delivery (transmission and distribution) networks. It is envisioned that the electric power grid will move from an electromechanically controlled system to an electronically controlled network in the next two decades. A key challenge is how to redesign, retrofit, and upgrade the existing electromechanically controlled system into a smart self-healing grid that is driven by a well-designed market approach. Revolutionary developments in both information technology and materials science and engineering promise significant improvements in the security, reliability, efficiency, and cost effectiveness of electric power delivery systems. Focus areas in materials and devices include sensors, smart materials and structures, microfabrication, nanotechnology, advanced materials, and smart devices.
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Cao, Jin Ping, Jian Ming Liu, Shao Min Zhu, and De Quan Gao. "A Modified Proportional Fair Scheduling Algorithm for the Electric Power Wireless Private Network." Advanced Materials Research 614-615 (December 2012): 1749–53. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1749.
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With the development of smart grid, the requirements of high speed, low delay and better coverage have motivated a electric power wireless network that bridge the communication gaps between the transmission system and the load. In this paper, we introduce a new electric power wireless communication network, and give a general overview of studies on the major characters of communication such as wide coverage, a lot of measurement points in distribution networks as well. In order to improve the communication performance, the paper proposes a modified proportional fair algorithm, which allocates the radio resources by introducing a Quality-of-Service (QoS) scale factor. By comparing with the proportional fair algorithm, we get the conclusion that the modified algorithm is more suitable for the electric power wireless private network.
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Zhang, Shu Hao, Gang Jun Gong, Xiang Ping Ni, Ya Di Zhang, and Xi Fang. "The Application of Heterogeneous Integrated Network and Security Mechanism Research in High Voltage Transmission Line Monitoring System." Advanced Materials Research 614-615 (December 2012): 1116–21. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.1116.
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In order to meet the requirement of high voltage transmission lines monitoring system, this paper presents a heterogeneous integrated network which contains Optical Ethernet, broadband wireless communication networks and wireless sensor networks in high voltage transmission line monitoring system. Moreover, considering the characteristics of the heterogeneous integrated communication network and analyzing the features of service security mechanism in communication network, this paper proposes an authentication and encryption security system, which has certain value in the authentication and encryption aspects to electric power system communication.
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Du, Shu, Ze Hui Xu, Hai Tao Wang, and Wei Fu Peng. "Power Efficient Port Assignment for Connection Provision in IP-over-WDM Optical Networks." Applied Mechanics and Materials 701-702 (December 2014): 1093–97. http://dx.doi.org/10.4028/www.scientific.net/amm.701-702.1093.
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In the IP-over-WDM networks, electric power is more consumed at IP layer. This letter proposes two power-saving dynamic connection provision algorithms, called Most Used First (MUF) and State Transmission Time Aware (STTA) respectively, which can direct the incoming connection request to already provisioned router line cards and chassis, and hence reduce the number of active IP devices so to save electric power. For a typical network, MUF and STTA can save over 3% and 7% power respectively comparing with conventional power-unaware approach.