Power Flow Model for Medium-voltage Distribution Systems Considering Measurement and Structure Characteristics
Journal of Modern Power Systems and Clean Energy, vol. 12, pp. 571–583
Abstract
Medium-voltage distribution systems (MVDSs) mainly consist of a feeder head, lines, distribution transformers, and the equivalent load or power supply interfaced with the distribution transformers. The information of such load or power supply can be measured via the three-wattmeter method (THM) and the two-wattmeter method (TWM). The measurements can be used to perform the control of the power supply and simulate the characteristics of the load, so the models of the load and the power supply need to consider the measurement characteristics. Existing research works on three-phase power flow (PF) just consider the measurement characteristics of THM. Hence, the PF equation of the bus measured via TWM is firstly built. Based on conventional measurements, an accurate and general model of the grounded and ungrounded slack bus is proposed. Furthermore, the influence arising from the connection type and angle shift of distribution transformers on the admittance matrix is considered, and thus a general three-phase transformer model is summarized, which is applicable for all the transformers mentioned herein. Finally, Newton's method is adopted to solve the PF calculation, and the performance of the proposed PF model is demonstrated through designed tests.
Authors 6
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Zhengmei Lu Aachen Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center
Chongqing University · Fraunhofer Institute for Applied Information Technology · State Grid Zhejiang Electric Power Company (China) · RWTH Aachen University
Affiliation as printed
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China
Digital Energy Fraun-hofer FIT, Aachen, 52072, Germany
Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, 52074, Germany, and A
Transmission Equipment & System Security and New Technolo-gy, Chongqing University, Chongqing 400044, China
Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu 322001, China
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Wei Yan Aachen Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center
Chongqing University · Fraunhofer Institute for Applied Information Technology · State Grid Zhejiang Electric Power Company (China) · RWTH Aachen University
Affiliation as printed
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China
Digital Energy Fraun-hofer FIT, Aachen, 52072, Germany
Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, 52074, Germany, and A
Transmission Equipment & System Security and New Technolo-gy, Chongqing University, Chongqing 400044, China
Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu 322001, China
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Dezhi Huang Aachen Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center
Chongqing University · State Grid Corporation of China (China) · Fraunhofer Institute for Applied Information Technology · State Grid Zhejiang Electric Power Company (China) · RWTH Aachen University
Affiliation as printed
State Grid Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu, China
Digital Energy Fraun-hofer FIT, Aachen, 52072, Germany
Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, 52074, Germany, and A
Transmission Equipment & System Security and New Technolo-gy, Chongqing University, Chongqing 400044, China
Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu 322001, China
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Junjie Tang Aachen Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center
Chongqing University · Fraunhofer Institute for Applied Information Technology · State Grid Zhejiang Electric Power Company (China) · RWTH Aachen University
Affiliation as printed
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing, China
Digital Energy Fraun-hofer FIT, Aachen, 52072, Germany
Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, 52074, Germany, and A
Transmission Equipment & System Security and New Technolo-gy, Chongqing University, Chongqing 400044, China
Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu 322001, China
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Ferdinanda Ponci Aachen Institute for Automation of Complex Power Systems of the E.ON Energy Research Center Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center
Chongqing University · Fraunhofer Institute for Applied Information Technology · State Grid Zhejiang Electric Power Company (China) · RWTH Aachen University
Affiliation as printed
Institute for Automation of Complex Power Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, Germany
Digital Energy Fraun-hofer FIT, Aachen, 52072, Germany
Institute for Automation of Complex Pow-er Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, 52074, Germany, and A
Transmission Equipment & System Security and New Technolo-gy, Chongqing University, Chongqing 400044, China
Zhejiang Yiwu Power Supply Company, State Grid Zhejiang Electric Power Company, Yiwu 322001, China
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Antonello Monti Aachen Institute for Automation of Complex Power Systems of the E.ON Energy Research Center
Fraunhofer Institute for Applied Information Technology · RWTH Aachen University
Affiliation as printed
Digital Energy Fraun-hofer FIT, Aachen, Germany
Institute for Automation of Complex Power Systems of the E.ON Energy Research Center at RWTH Aachen University, Aachen, Germany
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