Research on Access Mode of the Flexible DC Power Distribution System into AC System

Yao Liu, Jianfu Chen, Lu Qu, Zhanqing Yu, Zipan Nie and Rong Zeng
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Yao Liu: School of Electric Power, South China University of Technology, Guangzhou 510640, China
Jianfu Chen: Zhuhai Power Supply Bureau, Guangdong Power Grid Co., Ltd., Zhuhai 519000, China
Lu Qu: State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
Zhanqing Yu: State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
Zipan Nie: State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China
Rong Zeng: State Key Lab of Power Systems (Department of Electrical Engineering), Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 20, 1-15

Abstract: The connection mode of the direct current (DC) power distribution system and the alternating current (AC) system is the foundation of system design, and it is also one of key technologies of the DC power distribution network. Based on the topology structure, grounding method, main equipment parameters, load parameters and system control protection strategy of the DC power distribution system, this paper establishes the system simulation model in the case of configuring the connection transformer and not configuring the connection transformer. Simulation results show that, when no connecting transformer is installed, the interaction between AC and DC systems will be great when faults occur, and the cost of converter valves and DC reactors will be increased. When connecting transformers are installed, the interaction between AC and DC systems can be effectively isolated, and the operation reliability of the system will be greatly improved while the cost is saved. Therefore, it is recommended to configure an independent connection transformer in the DC distribution system.

Keywords: flexible DC power distribution; access mode; connection transformer; fault current (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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