Готові списки джерел за темами / GRID POWER

Добірка наукової літератури з теми "GRID POWER"

Автор: Grafiati
Опубліковано: 11 вересня 2023

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Статті в журналах з теми "GRID POWER"

1

Nakayama, Mikiyasu, Hirotaka Fujibayashi, and Daisuke Sasaki. "Connecting Jordan to GCC Power Grid: Creation of Geopolitical “Power” Grid." Journal of Asian Development 3, no. 2 (April 12, 2017): 10. http://dx.doi.org/10.5296/jad.v3i2.10966.

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Анотація:
Jordan agreed in May 2016 to join the existing Gulf countries’ power grid (GCC Power Grid). This planned connection with the GCC countries has some political importance, aside from simply promoting trade of electricity between Jordan and GCC countries. This article aims at finding out the “embedded agenda” behind the planned connection of power grids between Jordan and the GCC countries. It was found that Jordan’s participation in the GCC Power Grid is advantageous for Saudi Arabia and Jordan for trading electricity between two countries in the future. The planned connection of the power grid signifies the strengthened relation between two countries, without having troubles to be caused (among GCC’s member states) by Jordan’s official participation in the GCC as a new member. Jordan is so vulnerable to oil price surge, the development of alternative energies represented by renewable energies has a very significant meaning. Jordan could export electricity derived from renewable sources to neighboring countries in the future. Jordan historically serves as a buffer zone among countries with different interests and religions in the Middle East. Connection Jordan to the GCC Power Grid seems to have an utmost political importance for the GCC member states, particularly Saudi Arabia.
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2

An, Lei, Xinyi Lan, Mianbin Wang, and Jinchao Li. "Research on power grid effective assets input-output evaluation based on super-efficient DEA model." E3S Web of Conferences 118 (2019): 01054. http://dx.doi.org/10.1051/e3sconf/201911801054.

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Анотація:
With the deepening of power system reform, the precise investment and lean development of power grids have become the focus of power grid enterprises. It is of great significance to carry out evaluation research on the efficiency of input and output of effective assets of power grids. Based on the analysis of the status quo of effective asset evaluation in China’s power grid, this paper combines the model of super-efficient DEA with the analysis of effective asset output efficiency of power grid to construct an evaluation system of effective asset input and output efficiency of power grids, and takes the national power grid as an example for calculation and analysis. This paper objectively evaluates the internal and external factors affecting the efficiency of the effective assets of the grid, and provides quantitative analysis support for the effective asset investment decision of the grid.
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3

Liu, Jian, Ying Wei Song, Yan Liu, Hui Lan Jiang, and Shuang Qi Zheng. "Effect of Fluctuation of Wind Power Output on Power System Risk." Applied Mechanics and Materials 513-517 (February 2014): 2971–74. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.2971.

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Анотація:
With expansion of the scale of wind power used in grid, its impact on the power grid has become more and more apparent. Because of its characteristics of intermittency and randomness, it is necessary to study the effect of wind power fluctuation on power system risk. The large scale wind power farm is connected to the power grid, the influence of its output fluctuation on static security of power grids is studied in this paper, and corresponding evaluation risk index of the power grid security is built. A new type of power system analysis software (PSAT) is used for the simulation analysis, and the results show that output fluctuation of wind power has great influence on low voltage and overload risk of power system.
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4

Hou, Rui, Jian Wu, Huihui Song, Yanbin Qu, and Dianguo Xu. "Applying Directly Modified RDFT Method in Active Power Filter for the Power Quality Improvement of the Weak Power Grid." Energies 13, no. 18 (September 17, 2020): 4884. http://dx.doi.org/10.3390/en13184884.

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Анотація:
The recursive discrete Fourier transformation (RDFT) method can be used for grid voltage phase-locking and harmonic current detection in a shunt active power filter (SAPF). However, in weak power grids such as microgrids, significant errors might occur in the amplitude and phase detection due to grid frequency deviation. In this study, to resolve this problem, a directly modified RDFT (DMRDFT) method is proposed for SAPF weak grid application. Through theoretical analysis, the errors of phase and amplitude detection were found to consist of fixed error and fluctuating error. The fixed error is only determined by frequency deviation, whereas the fluctuating error is also related to the recursive pointer and the initial phase. The DMRDFT algorithm can obtain the real grid frequency through the calculation of the phase angle difference for two consecutive periods. Then it can employ the grid frequency deviation and the recursive pointer value to directly correct the detection results gathered by the conventional RDFT algorithm. As a result, DMRDFT can yield accurate amplitude and phase information of the grid voltage or current with a simple calculation. Simulation results verify the high precision of the proposed DMRDFT method in both steady and dynamic situations. Experimental results show that the DMRDFT method can significantly increase the SAPF compensation performance when grid frequency shifts.
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5

Huang, Liang, Chao Wu, Dao Zhou, and Frede Blaabjerg. "Impact of Grid Strength and Impedance Characteristics on the Maximum Power Transfer Capability of Grid-Connected Inverters." Applied Sciences 11, no. 9 (May 10, 2021): 4288. http://dx.doi.org/10.3390/app11094288.

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Анотація:
Continuously expanding deployments of distributed power generation systems are transforming conventional centralized power grids into mixed distributed electrical networks. The higher penetration and longer distance from the renewable energy source to the main power grid result in lower grid strength, which stimulates the power limitation problem. Aimed at this problem, case studies of inductive and resistive grid impedance with different grid strengths have been carried out to evaluate the maximum power transfer capability of grid-connected inverters. It is revealed that power grids with a higher short circuit ratio (SCR) or lower resistance-inductance ratio (R/X) provide higher power transfer capability. Moreover, under the resistive grid conditions, a higher voltage at the point of common coupling (PCC) is beneficial to increase the power transfer capability. Based on mathematical analysis, the maximum power curves in the inductive and resistive grids can be found. Moreover, a performance index is proposed in this paper to quantify the performance of the system with different parameter values. Finally, the effectiveness of the analysis is verified by simulation.
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6

Unruh, Peter, Maria Nuschke, Philipp Strauß, and Friedrich Welck. "Overview on Grid-Forming Inverter Control Methods." Energies 13, no. 10 (May 20, 2020): 2589. http://dx.doi.org/10.3390/en13102589.

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Анотація:
In this paper, different control approaches for grid-forming inverters are discussed and compared with the grid-forming properties of synchronous machines. Grid-forming inverters are able to operate AC grids with or without rotating machines. In the past, they have been successfully deployed in inverter dominated island grids or in uninterruptable power supply (UPS) systems. It is expected that with increasing shares of inverter-based electrical power generation, grid-forming inverters will also become relevant for interconnected power systems. In contrast to conventional current-controlled inverters, grid-forming inverters do not immediately follow the grid voltage. They form voltage phasors that have an inertial behavior. In consequence, they can inherently deliver momentary reserve and increase power grid resilience.
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7

Yu, Dong, Shan Gao, Xin Zhao, Yu Liu, Sicheng Wang, and Tiancheng E. Song. "Alternating Iterative Power-Flow Algorithm for Hybrid AC–DC Power Grids Incorporating LCCs and VSCs." Sustainability 15, no. 5 (March 3, 2023): 4573. http://dx.doi.org/10.3390/su15054573.

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Анотація:
AC–DC power-flow calculation is the basis for studying HVDC systems. Since traditional iterative methods need many alternative iterations and have convergence problems, this paper proposes an alternating iterative power-flow algorithm for hybrid AC–DC power grids incorporating line-commutated converters (LCCs) and voltage source converters (VSCs). Firstly, the algorithm incorporates the converter interface model into the AC side, considering the influence of the DC side on the AC side, and establishes an AC-augmented Jacobian matrix model with LCC/VSC interface equation variables. Then, according to the type of converter, control mode, and DC grid control strategy, a DC grid power-flow calculation model under various control modes is established for realizing the power-flow decoupling calculation of AC–DC power grids incorporating LCCs and VSCs. The accuracy and effectiveness of the improved algorithm are evaluated using modified IEEE 57 bus AC–DC networks and the CIGRE B4 DC grid test system. The improved algorithm is applicable to various DC grid control modes and considers the reasonable adjustment of the DC grid variable constraints and operating modes.
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8

Meinecke, Steffen, Džanan Sarajlić, Simon Ruben Drauz, Annika Klettke, Lars-Peter Lauven, Christian Rehtanz, Albert Moser, and Martin Braun. "SimBench—A Benchmark Dataset of Electric Power Systems to Compare Innovative Solutions Based on Power Flow Analysis." Energies 13, no. 12 (June 26, 2020): 3290. http://dx.doi.org/10.3390/en13123290.

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Анотація:
Publicly accessible, elaborated grid datasets, i.e., benchmark grids, are well suited to publish and compare methods or study results. Similarly, developing innovative tools and algorithms in the fields of grid planning and grid operation is based on grid datasets. Therefore, a general methodology to generate benchmark datasets and its voltage level dependent implementation is described in this paper. As a result, SimBench, a comprehensive dataset for the low, medium, high and extra-high voltage level, is presented. Besides grids that can be combined across several voltage levels, the dataset offers an added value by providing time series for a whole year as well as future scenarios. In this way, SimBench is applicable for many use cases and simplifies reproducing study results. As proof, different automated algorithms for grid planning are compared to show how to apply SimBench and make use of it as a simulation benchmark.
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9

Cao, Li, Zhengzong Wang, and Yinggao Yue. "Analysis and Prospect of the Application of Wireless Sensor Networks in Ubiquitous Power Internet of Things." Computational Intelligence and Neuroscience 2022 (June 15, 2022): 1–19. http://dx.doi.org/10.1155/2022/9004942.

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Анотація:
With the rapid development of the economy and society, the low efficiency and high loss of the traditional power grid can no longer meet the growing social demand, and the power grid market is facing a reform. Smart grid, as a next-generation power system, it can effectively improve the performance of traditional power grids. The ubiquitous power Internet of Things (UPIOT) replaces the traditional grids with efficient, safe, reliable, and flexible new grids, improves the utilization efficiency of the grid, reduces the loss of the power grid in the transmission process, and can meet the needs of different types of markets and users. As an advanced information acquisition and processing technology, wireless sensor networks have been widely used in medical, industrial, agricultural, commercial, and public management fields. It is an important means to promote future economic development and build a harmonious society. In the power system, wireless sensor network technology can be widely used in many fields such as line fault location, real-time monitoring, smart meter reading, and relay protection. In this paper, the basic concepts and overall architecture of ubiquitous power Internet of Things are summarized. Then, we summarize the research status of the wireless sensor network in smart grid, including power equipment, line monitoring, smart grid wireless automatic meter reading, distribution network relay protection, power assets life-cycle management, power grid fault location, and power grid fault diagnosis. In view of the technical characteristics of wireless sensor networks, combined with the production links of power systems, the application framework of wireless sensor network technology in the power systems is constructed. The application of wireless sensor networks is prospected from the aspects of network development of relay protection, application research of smart substation, application research of power grid catastrophe, security protection of power system, and deep-seated ubiquitous power Internet of Things.
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10

Meinecke, Steffen, Leon Thurner, and Martin Braun. "Review of Steady-State Electric Power Distribution System Datasets." Energies 13, no. 18 (September 15, 2020): 4826. http://dx.doi.org/10.3390/en13184826.

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Анотація:
Publicly available grid datasets with electric steady-state equivalent circuit models are crucial for the development and comparison of a variety of power system simulation tools and algorithms. Such algorithms are essential to analyze and improve the integration of distributed energy resources (DERs) in electrical power systems. Increased penetration of DERs, new technologies, and changing regulatory frameworks require the continuous development of the grid infrastructure. As a result, the number and versatility of grid datasets, which are required in power system research, increases. Furthermore, the used grids are created by different methods and intentions. This paper gives orientation within these developments: First, a concise overview of well-known, publicly available grid datasets is provided. Second, background information on the compilation of the grid datasets, including different methods, intentions and data origins, is reviewed and characterized. Third, common terms to describe electric steady-state distribution grids, such as representative grid or benchmark grid, are assembled and reviewed. Recommendations for the use of these grid terms are made.
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Більше джерел

Дисертації з теми "GRID POWER"

1

Hacker, Jonathan Bruce Rutledge David B. "Grid mixers and power grid oscillators /." Diss., Pasadena, Calif. : California Institute of Technology, 1994. http://resolver.caltech.edu/CaltechETD:etd-11302007-145419.

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2

Foo, Ming Qing. "Secure electric power grid operation." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/106964.

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Анотація:
Thesis: S.M., Massachusetts Institute of Technology, School of Engineering, Center for Computational Engineering, Computation for Design and Optimization Program, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 87-91).
This thesis examines two problems concerning the secure and reliable operation of the electric power grid. The first part studies the distributed operation of the electric power grid using the power flow problem, which is vital to the operation of the grid. The power flow problem is a feasibility problem for finding an assignment of complex bus voltages that satisfies the power flow equations and is within operational and safety limits. For reliability and privacy reasons, it is desirable to solve the power flow problem in a distributed manner. Two novel distributed algorithms are presented for solving convex feasibility problems for networks based on the Method of Alternating Projections (MAP) and the Projected Consensus algorithm. These algorithms distribute computation among the nodes of the network and do not require any form of central coordination. The original problem is equivalently split into small local sub-problems, which are coordinated locally via a thin communication protocol. Although the power flow problem is non-convex, the new algorithms are demonstrated to be powerful heuristics using IEEE test beds. Quadratically Constrained Quadratic Programs (QCQP), which occur in the projection sub-problems, are studied and methods for solving them efficiently are developed. The second part addresses the robustness and resiliency of state estimation algorithms for cyber-physical systems. The operation of the electric power grid is modeled as a dynamical system that is supported by numerous feedback control mechanisms, which depend heavily on state estimation algorithms. The electric power grid is constantly under attack and, if left unchecked, these attacks may corrupt state estimates and lead to severe consequences. This thesis proposes a novel dynamic state estimator that is resilient against data injection attacks and robust to modeling errors and additive noise signals. By leveraging principles of robust optimization, the estimator can be formulated as a convex optimization problem and its effectiveness is demonstrated in simulations of an IEEE 14-bus system.
by Ming Qing Foo.
S.M.
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3

Shams, Solary Arasto. "Wind power plants integration to the power grid." Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-200633.

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4

Zhang, Weiyi. "Control of grid connected power converters with grid support functionalities." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/456312.

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Анотація:
The installation of power generation systems based on renewable energy sources has been increasing exponentially over the last decades. However, in spite of the well-known merits of such energy sources, the expansion of renewable-based generation (RG) plants, which interface the grid through power converters, can produce also negative impacts on the electrical grid, due to its power processing mechanism, which is different from traditional generation plants. In fact, the regulation capability of the grid can decrease as much as the share of the RG increases. To avoid this, power conversion systems belonging to RG plants are requested to be more grid-friendly, and responsive to the electrical network conditions. In this way, they can contribute to the electrical network stability as other generation does, instead of behaving as simply grid-feeding systems focused on injecting as much power as possible.This PhD dissertation is focused on the control of grid-connected power converters with grid support functionalities based on the Synchronous Power Controller (SPC) concept. The SPC is an established solution for controlling grid connected power converters and equipping them with emulated and improved synchronous machine characteristics. In addition to the general goal of improving the grid interaction of the RG plants, grid support functionality stands as a main property among the characteristics given by the SPC. In this dissertation the virtual admittance structure, contained in the electrical block of the SPC, which emulates the stator output impedance of the synchronous machines, is analyzed. Moreover, it is extended to a study case where the admittance value can be different for positive- and negative-sequence components. The designed virtual admittance block contains three branches, which are responsible for positive-sequence current injection, negative-sequence current injection and other harmonic components, respectively. The converter¿s performance under asymmetrical grid fault is especially considered in this case.The analysis and arrangements in the design of the SPC¿s power loop controller is another contribution of this research. Other methods that consider synchronous machine emulation normally construct the controller by reproducing the synchronous generation swing equation. Based on the virtual implementation, which is free from mechanical constraints, one can set a proper damping factor achieving thus better dynamics compared to the traditional synchronous machines. However, the increase of the damping factor changes the inherent power-frequency (P-f) droop characteristics, which may lead to undesired deviations in the active power generation. In the framework of this PhD, a method that modifies the conventional swing equation emulation and lets the inherent P-f droop characteristics be configurable, independently of the inertia and damping characteristics, is proposed.The work presented in this dissertation is supported by mathematical and simulation analysis. Moreover, in order to endorse the conclusions achieved, a complete experimental validation has been conducted. As it will be shown, the performance of the SPC has been validated in tests once the main parts, namely virtual admittance and power loop controller, and other parts are settled. The simulation and experimental test scenarios include events like changes in the power operation point, frequency sweeps, voltage magnitude changes, start-up and parallel converters operation, which are given under different control configurations like the different structures for the power loop controller and different control parameters. This PhD research also compares the transient performance of the SPC-based power converters with the ones achieved with conventional control methods.
Los convertidores de potencia conectados a la red actúan comúnmente como interfaz entre plantas de generación basadas en energía renovable y la red eléctrica, permitiendo así el procesado de energía eólica y fotovoltaica y su inyección a red. El control de estos convertidores conectados a la red ha sido objeto de estudio en las últimas décadas, ya que su comportamiento y prestaciones influye de forma determinante tanto en la calidad de la red eléctrica, así como en el cumplimiento de los requisitos de conexión a la red fijados por los códigos de red. Junto con la expansión de las plantas de generación de energía renovable, su impacto en el sistema eléctrico ha crecido también, lo cual ha hecho que se lleven a cabo muchos trabajos de investigación orientados a armonizar la penetración de renovables con la estabilidad de la red. Con los sistemas de control actuales la capacidad de regulación de la red disminuye tanto como la proporción de la generación renovable aumenta. En las redes eléctricas del futuro, se espera que los convertidores de potencia, que actúan como interfaz, exploten sus posibilidades de cómputo y control permitiendo mejorar la interacción de la generación renovable con la red. En este contexto los controles de tipo “droop control”, los cuales son ampliamente utilizados en sistemas de generación tradicionales, se pueden aplicar a los convertidores conectados a red para habilitar funciones de soporte de red, ya que estos contribuyen al control de tensión y frecuencia primaria ajustando el intercambio de potencia activo y reactiva de forma proporcional a la desviación de la frecuencia y magnitud de la tensión en el punto de conexión. En el caso de regulación de frecuencia, y para que este sea bidireccional, el convertidor puede interactuar con la red con la ayuda de sistemas de almacenamiento de energía. Sin embargo, la inclusión del “droop control” no conlleva una solución global. Incluso si se ajusta de forma óptima y se dispone de reserva de energía, aún hay cuestiones como la respuesta inercial que no se pueden dar con este tipo de control. La generación en los sistemas tradicionales se lleva a cabo principalmente por generadores síncronos. Comparados con estos, los convertidores conectados a la red difieren principalmente en la falta de la característica electromecánica. En consecuencia, la estática y la dinámica de las unidades de generación de energía renovable son diferentes en comparación con los generadores síncronos. La dinámica de estos convertidores es altamente dependiente de los sistemas de sincronización (PLL), cuyo comportamiento se degrada en condiciones de red adversas o distorsionadas. Además, el control de potencia normalmente depende control de potencia instantáneo. Debido a las diferentes dinámicas, la inercia total en la red no aumenta junto con la integración de las energías renovables. Sin embargo, los códigos de red han incluido requerimientos tales como “inercia sintética" en los requisitos. Otras deficiencias del control del convertidor convencional incluyen el rendimiento inferior bajo condiciones de avería de red, en conexión de red débil y conexión de red de relación X / R baja. Esta tesis doctoral estudia y valida el control de los convertidores conectados a la red con funcionalidades de soporte de red. El objetivo general del trabajo es mejorar las características de interacción de la red de las plantas de generación de energía renovable mediante la especificación de los convertidores conectados a la red con características de la máquina síncrona emulada y mejorada. La tesis ha aportado contribuciones o ha mostrado originalidades en los siguientes aspectos: Un enfoque de ajuste de bucle de control de corriente interno generalizado; Diseño detallado y validación de la admisión virtual para convertidores conectados a la red; Diseño detallado y validación del circuito de control de potencia para la emulación de inercia y amortiguación.
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5

Lim, Pei Yi. "Power management strategies for off-grid hybrid power systems." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2503.

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Анотація:
At present, there are still a large number of people living in isolated areas, particularly in developing countries, who have no immediate access to the main electricity grid. Most of the energy demands of these remote communities are met by diesel-operated power systems, which are relatively affordable and available. With the ever increasing awareness of climate change, many local authorities have taken initiatives to reduce the carbon footprint of certain energy sectors. In some rural applications, diesel generator power systems are augmented by single or multiple renewable energy supply units to form an off-grid hybrid power system.Generally, the majority of off-grid hybrid power systems include a massive battery bank to store excess renewable energy to supply the user load demand during the period when renewable energy is deficient. In the charging and discharging processes, energy losses may occur due to the inefficiency of the charger and the battery cells. Also, inclusion of an energy storage element into a hybrid power system incurs additional investment costs and involves recycling issues. Therefore, it is necessary to minimise the size of storage, whenever possible, and operate the system under an appropriate power management strategy to ensure efficient system operation.The chosen power management strategy impacts long-term performance of a system as well as components’ longevity. The research presented in this thesis describes the development of an advanced power management concept for the operation of a photovoltaic-variable speed diesel generator hybrid power system.A general introduction regarding the research background to hybrid power system applications and fundamentals of solar energy is presented. A component sizing and control program is developed to facilitate hybrid power system design. Then, various off-grid power system configurations are further discussed with emphasis on the system performances and economic aspects.A prediction technique, namely the Hourly-based Prediction Model for solar irradiance and load demand forecasts is discussed. Forecast algorithms for the hourly solar irradiance and load demand predictions are presented. The proposed prediction models are implemented in the power management strategy for the off-grid photovoltaic-variable speed diesel generator hybrid power system. Assessments of the prediction models through comprehensive analyses of statistical measures are presented.HOMER simulation software has been adopted for time series generation and economic analyses for several off-grid power system configurations. Also, the HOMER simulation results for electrical aspects are used as a benchmark to evaluate the component models developed in this thesis. Due to the fact that HOMER offers limited choices of power management strategy and users do not have access to modify the control algorithms, it is impossible to determine the performance of a system under advanced power management strategy. Therefore, analytical performance models of system components have been developed using the MATLAB/Simulink software to allow the implementation of the proposed power management strategy.The concepts and flow charts of the predictive power management strategy are described. This power management strategy consists of predictive and adaptive dispatch. The time step of the predictive dispatch is fixed to one hour while the time step of the adaptive dispatch is one minute. Operation of the additional generator capacity of the hybrid power system is based on the predicted net load. The adaptive dispatch supports the predictive dispatch to handle fluctuations of net load that occur in between prediction intervals.Simulation results of the performance of hybrid power systems using different types of diesel generator and power management strategies are presented. Particular emphasis is on the comparisons of the system performances using non-predictive and predictive power management strategies. These simulations allow quantitative assessment of the system performances in terms of electrical output, fuel consumption and carbon dioxide emission.Last but not least, the entire research is summarised and concluded with suggestions for future research. In short, the photovoltaic-variable speed diesel generator hybrid power system topology and the proposed power management strategy offer an alternative to the off-grid hybrid power system design, with the aims of overcoming the complex technical issues associated with energy storage and of contributing to market extension of hybrid power systems, particularly in remote locations where financial and technical issues are the major concerns.
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6

Djerf, Magnus. "Power grid integration using Kalman filtering." Thesis, Uppsala universitet, Signaler och System, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-169195.

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Анотація:
Renewable power sources with a relatively uneven or constant DC power production require synchronization methods to work with the current utility power grid. The solution to this synchronization problem has been solved with semiconductor based converters and advanced switching algorithms. To enable switching algorithms that work well with the grids amplitude, phase-shift and frequency, the current waveform has to be measured and estimated.    There are many sources of noise that will add distortion of the current waveform, making its appearance less similar to the grids. The distorted measurement affects the accuracy of the converters negatively. Therefore, using a filter algorithm to attenuate the grid noise is required.  This project uses a Kalman filter with the aim to decrease the noise and estimate the current phase shift for a three phase power-grid.  To achieve reliable and fast calculation, implementing the Kalman filter within a FPGA were done.The project contains results from both simulated MATLAB data and the FPGAs real time data. The method was able to estimate the grid within a few Hz frequency deviation and enable some noise reduction. For larger degree of harmonic distortion during steady state operation, the Kalman filter could remove more of the harmonic distortion. Limits and differences with MATLAB are discussed for the FPGA implemented Kalman filter.
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7

Skivington, Graeme Ross. "Off grid applications for wind power." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426299.

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8

Azmi, Syahrul Ashikin. "Grid integration of renewable power generation." Thesis, University of Strathclyde, 2014. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=23161.

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This thesis considers the use of three-phase voltage and current source inverters as interfacing units for renewable power, specifically photovoltaic (PV) into the ac grid. This thesis presented two modulation strategies that offer the possibility of operating PV inverters in grid and islanding modes, with reduced switching losses. The first modulation strategy is for the voltage source inverter (VSI), and exploits 3rd harmonic injection with selective harmonic elimination (SHE) to improve performance at low and high modulation indices, where the traditional SHE implementation experiences difficulties due to pulse dropping. The simulations and experimentation presented show that the proposed SHE allows grid PV inverters to be operated with less than a 1kHz effective switching frequency per device. This is vital in power generation, especially in medium and high power applications. Pulse dropping is avoided as the proposed modified SHE spreads the switching angles over 90°, in add ition increasing the modulation index. The second proposed modulation strategy, called direct regular sampled pulse width modulation (DRSPWM), is for the current source inverter (CSI). It exploits a combination of forced and natural commutation imposed by the co-existence of an insulated gate bipolar transistor in series with a diode in a three phase current source inverter, to determine device dwell times and switching sequence selection. The DRSPWM strategy reduces switching frequency per device in a CSI by suspending each phase for 60°, similar to VSI dead-band, thus low switching losses are expected. Other benefits include simple digital platform implementation and more flexible switching sequence selection and pulse placement than with space vector modulation. The validity of the DRSPWM is confirmed using simulations and experimentation. This thesis also presents a new dc current offset compensation technique used to facilitate islanding or grid operation of inverter based distributed generation, with a reduced number of interfacing transformers. The proposed technique will enable transformerless operation of all inverters within the solar farm, and uses only one power transformer at the point of common coupling. The validity of the presented modulation strategies and dc current offset compensation technique are substantiated using simulations and experimentation.
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9

Hanson, Alex J. (Alex Jordan). "Enabling miniaturized grid-interface power conversion." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122735.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 271-281).
Many of the most critical challenges of the twenty-first century revolve around energy and its management. Improved performance (efficiency, density) in electrical energy management systems require advancements in a number of areas - semiconductor devices, passive energy storage components, and a variety of circuit- and system-level concerns. The sections of this thesis are somewhat distinct and may find application in a great variety of circumstances. Nevertheless, they can be understood as contributions to a single application system: a grid-interface power converter. These kinds of converters have several unique aspects that make them good targets for research, including a heavy reliance on magnetic components, relatively high voltages for application of emerging GaN transistors, wide range of operating voltages and powers, and a twice-line-frequency energy storage component that is difficult to miniaturize. This thesis will present a high-frequency inductor structure with greatly improved density, an exploration of the limits of magnetic-based current sensing, a method for characterizing GaN losses with large-signal excitations, a control approach for miniaturizing grid-interface energy buffers, and a grid-interface circuit with several advantages over the state of the art.
by Alex J. Hanson.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science
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10

Elyas, Seyyed Hamid 8045266. "Synthetic Modeling of Power Grids Based on Statistical Analysis." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4888.

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The development of new concepts and methods for improving the efficiency of power networks needs performance evaluation with realistic grid topology. However, much of the realistic grid data needed by researchers cannot be shared publicly due to the security and privacy challenges. With this in mind, power researchers studied statistical properties of power grids and introduced synthetic power grid topology as appropriate methodology to provide enough realistic power grid case studies. If the synthetic networks are truly representative and if the concepts or methods test well in this environment they would test well on any instance of such a network as the IEEE model systems or other existing grid models. In the past, power researchers proposed a synthetic grid model, called RT-nested-smallworld, based on the findings from a comprehensive study of the topology properties of a number of realistic grids. This model can be used to produce a sufficiently large number of power grid test cases with scalable network size featuring the same kind of small-world topology and electrical characteristics found in realistic grids. However, in the proposed RT-nested-smallworld model the approaches to address some electrical and topological settings such as (1) bus types assignment, (2) generation and load settings, and (3) transmission line capacity assignments, are not sufficient enough to apply to realistic simulations. In fact, such drawbacks may possibly cause deviation in the grid settings therefore give misleading results in the following evaluation and analysis. To address this challenges, the first part of this thesis proposes a statistical methodology to solve the bus type assignment problem. This method includes a novel measure, called the Bus Type Entropy, the derivation of scaling property, and the optimized search algorithm. The second part of this work includes a comprehensive study on generation/Load settings based on both topology metrics and electrical characteristics. In this section a set of approaches has been developed to generate a statistically correct random set of generation capacities and assign them to the generation buses in a grid. Then we determine the generation dispatch of each generation unit according to its capacity and the dispatch ratio statistics, which we collected and derived from a number of realistic grid test cases. The proposed approaches is readily applied to determining the load settings in a synthetic grid model and to studying the statistics of the flow distribution and to estimating the transmission constraint settings. Considering the results from the first two sections, the third part of this thesis will expand earlier works on the RT-nested-smallworld model and develop a new methodology to appropriately characterize the line capacity assignment and improve the synthetic power grid modeling.
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Книги з теми "GRID POWER"

1

Mei, Shengwei, Xuemin Zhang, and Ming Cao. Power Grid Complexity. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16211-4.

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2

Xuemin, Zhang, Cao Ming, and SpringerLink (Online service), eds. Power Grid Complexity. Berlin, Heidelberg: Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg, 2011.

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3

Alhelou, Hassan Haes, Nabil Mohammed, and Behrooz Bahrani. Grid-Forming Power Inverters. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003302520.

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4

Hynes, Patricia Freeland. The electric power grid. Ann Arbor: Cherry Lake, 2008.

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5

Bush, Stephen F. Smart grid - communication-enabled intelligence for the electric power grid. Chichester, West Sussex, [England]: John Wiley & Sons Inc., 2014.

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6

Grid security and management. New Delhi, India: Power Line Pub., 2009.

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7

Singh, Chanan, Panida Jirutitijaroen, and Joydeep Mitra. Electric Power Grid Reliability Evaluation. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119536772.

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8

Sarychev, Dmitriy S., Stanislav G. Slusarenko, Irina V. Krivykh, Victor V. Snezhko, and Leonid Yu Kostyuk. Power grid management software IndorInfo/Power: Users’s guide. Tomsk: Tomsk state university, 2008. http://dx.doi.org/10.17273/book.2008.6.

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9

Krivykh, Irina V., Dmitriy S. Sarychev, Victor V. Snezhko, and Natalia A. Polyakova. Power grid management software IndorInfo/Power: Reference guide. Tomsk: Tomsk state university, 2009. http://dx.doi.org/10.17273/book.2009.2.

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10

Sarychev, Dmitriy S., Stanislav G. Slusarenko, Irina V. Krivykh, Victor V. Snezhko, and Leonid Yu Kostyuk. Power grid management software IndorInfo/Power: Users’s guide. Tomsk: Tomsk state university, 2010. http://dx.doi.org/10.17273/book.2010.3.

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Частини книг з теми "GRID POWER"

1

Abe, Rikiya. "The Power Internet." In Digital Grid, 125–34. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4280-0_12.

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2

Abe, Rikiya. "Power Packets and Commercialization." In Digital Grid, 119–24. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4280-0_11.

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3

Daneshvar, Mohammadreza, Somayeh Asadi, and Behnam Mohammadi-Ivatloo. "Overview of the Grid Modernization and Smart Grids." In Power Systems, 1–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64099-6_1.

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4

Gerlach, P. "Power grid tubes." In The Microwave Engineering Handbook, 41–63. Boston, MA: Springer US, 1993. http://dx.doi.org/10.1007/978-1-4899-4552-5_3.

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5

Sapatnekar, Sachin S. "Power Grid Analysis." In Encyclopedia of Algorithms, 1598–601. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-2864-4_740.

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6

S.Sapatnekar, Sachin. "Power Grid Analysis." In Encyclopedia of Algorithms, 1–4. Boston, MA: Springer US, 2014. http://dx.doi.org/10.1007/978-3-642-27848-8_740-1.

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7

Abe, Rikiya. "The New Power Platform Begins." In Digital Grid, 189–92. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-4280-0_19.

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8

Wanser, Sven, and Frank Ehlers. "Grid Integration." In Understanding Wind Power Technology, 369–405. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118701492.ch10.

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9

Mei, Shengwei, Xuemin Zhang, and Ming Cao. "Introduction." In Power Grid Complexity, 1–28. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16211-4_1.

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10

Mei, Shengwei, Xuemin Zhang, and Ming Cao. "Blackout Model Based on AC Power Flow." In Power Grid Complexity, 291–317. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16211-4_10.

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Тези доповідей конференцій з теми "GRID POWER"

1

Das, Saurav, Farzam Aidelkhani, Somir Mustak, A. K. M. Baki, and M. A. Razzak. "Grid voltage stabilization for smart grid systems." In 2016 IEEE 7th Power India International Conference (PIICON). IEEE, 2016. http://dx.doi.org/10.1109/poweri.2016.8077343.

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2

Halder, T. "A smart grid." In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/poweri.2014.7117674.

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3

Yu, Shiwen, Shuaiang Rong, and Lina He. "Performance of Grid-forming Control of Grid-edge DERs in Distribution Grids." In 2022 IEEE Power & Energy Society General Meeting (PESGM). IEEE, 2022. http://dx.doi.org/10.1109/pesgm48719.2022.9916842.

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4

Colaiacovo, Enrico, and Ulrich Ottenburger. "Power Grid Protection." In Qatar Foundation Annual Research Conference Proceedings. Hamad bin Khalifa University Press (HBKU Press), 2014. http://dx.doi.org/10.5339/qfarc.2014.itpp0601.

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5

Dongmei, Zhao, Wei Juan, Cheng Xueting, and Liu Yanhua. "Power grid fault diagnosis considering on grid-connected wind power." In 2013 IEEE Grenoble PowerTech. IEEE, 2013. http://dx.doi.org/10.1109/ptc.2013.6652285.

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6

Yuan, L., Z. Liu, J. Huang, F. Qiao, H. Yu, and T. Wen. "COMPARATIVE STABILITY ASSESSMENT OF GRID-FOLLOWING AND GRID-FORMING VSCS IN WEAK GRIDS." In The 10th Renewable Power Generation Conference (RPG 2021). Institution of Engineering and Technology, 2021. http://dx.doi.org/10.1049/icp.2021.2288.

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7

Soonee, Sushil K., S. C. Saxena, KVS Baba, S. R. Narasimhan, KVN Pawan Kumar, and Subrata Mukhopadhyay. "Flexibility in Indian Grid Operation with High Penetration of Grid-Connected Renewable Energy." In 2018 IEEE 8th Power India International Conference (PIICON). IEEE, 2018. http://dx.doi.org/10.1109/poweri.2018.8704395.

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8

Dyachuk, Dmytro, and Michele Mazzucco. "On allocation policies for power and performance." In 2010 11th IEEE/ACM International Conference on Grid Computing (GRID). IEEE, 2010. http://dx.doi.org/10.1109/grid.2010.5697986.

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9

Soonee, Sushil K., S. C. Saxena, K. V. S. Baba, S. R. Narasimhan, K. V. N. Pawan Kumar, and Subrata Mukhopadhyay. "Grid Resilience in Indian Power System." In 2018 IEEE 8th Power India International Conference (PIICON). IEEE, 2018. http://dx.doi.org/10.1109/poweri.2018.8704397.

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10

Imada, Takayuki, Mitsuhisa Sato, and Hideaki Kimura. "Power and QoS performance characteristics of virtualized servers." In 2009 10th IEEE/ACM International Conference on Grid Computing (GRID). IEEE, 2009. http://dx.doi.org/10.1109/grid.2009.5353054.

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Звіти організацій з теми "GRID POWER"

1

Bose, Anjan, Vaithianathan Venkatasubramanian, Carl Hauser, David Bakken, David Anderson, Chuanlin Zhao, Dong Liu, et al. Power grid reliability and security. Office of Scientific and Technical Information (OSTI), January 2015. http://dx.doi.org/10.2172/1173069.

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2

Ndiaye, Ibrahima, Enrique Betancourt Ramírez, Jesus Avila Montes, Yazhou Jiang, and Ahmed Elasser. Grid Ready, Flexible Large Power Transformer. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1527031.

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3

MAITRA, ARINDAM, RAY LITWIN, Jason lai, and David Syracuse. Ultrafast Power Processor for Smart Grid Power Module Development. Office of Scientific and Technical Information (OSTI), December 2012. http://dx.doi.org/10.2172/1124624.

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4

Sholander, Peter E. Application Note: Power Grid Modeling With Xyce. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1191079.

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5

Chinthavali, Supriya, Aleksandar D. Dimitrovski, Steven J. Fernandez, Christopher S. Groer, James J. Nutaro, Mohammed M. Olama, Olufemi A. Omitaomu, Mallikarjun Shankar, Kyle L. Spafford, and Bogdan Vacaliuc. Real Time Simulation of Power Grid Disruptions. Office of Scientific and Technical Information (OSTI), November 2012. http://dx.doi.org/10.2172/1082004.

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6

Hodge, Brian S., Kara Clark, Nicholas W. Miller, and Slobodan Pajic. Concentrating Solar Power Impact on Grid Reliability. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1464923.

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7

Taft, Jeffrey D. Architectural Basis for Highly Distributed Transactive Power Grids: Frameworks, Networks, and Grid Codes. Office of Scientific and Technical Information (OSTI), June 2016. http://dx.doi.org/10.2172/1523381.

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8

Gray, Genetha Anne, Jean-Paul Watson, Cesar Augusto Silva Monroy, and Robert B. Gramacy. Quantifiably secure power grid operation, management, and evolution :. Office of Scientific and Technical Information (OSTI), September 2013. http://dx.doi.org/10.2172/1096519.

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9

Petri, Mark C. National power grid simulation capability : need and issues. Office of Scientific and Technical Information (OSTI), June 2009. http://dx.doi.org/10.2172/1347575.

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10

Kroposki, Benjamin. Grid Integration Science, NREL Power Systems Engineering Center. Office of Scientific and Technical Information (OSTI), April 2017. http://dx.doi.org/10.2172/1354239.

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