QU Lu1, YU Zhanqing1, SONG Qiang1, YUAN Zhichang1, ZHAO Biao1, YAO Dawei1, CHEN Jianfu2, LIU Yao2, ZENG Rong1()
1. State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University; Advanced DC Power Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China 2. Zhuhai Power Supply Bureau, Zhuhai 519000, China
Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai
Lu QU1, Zhanqing YU1, Qiang SONG1, Zhichang YUAN1, Biao ZHAO1, Dawei YAO1, Jianfu CHEN2, Yao LIU2, Rong ZENG1()
1. State Key Lab of Power Systems, Department of Electrical Engineering, Tsinghua University; Advanced DC Power Center, Energy Internet Institute, Tsinghua University, Beijing 100084, China 2. Zhuhai Power Supply Bureau, Zhuhai 519000, China
The DC distribution system is an important development direction of the distribution system, which can improve the reliability and the quality of the power supply, and support the new energy, the energy storage, the electric vehicles, and the flexible access of AC and DC loads to grid. To realize the demonstration application of the DC distribution technology, China’s first demonstration project of the medium voltage DC distribution network will be built in Zhuhai, Guangdong Province to support the construction of the city energy internet. First, this paper analyzes the demand of the DC distribution network project, and puts forward the construction content and construction target. Then, it designs and analyzes the electrical connection mode, system operation mode, and startup and shutdown mode of the DC distribution network, and proposes the overall project construction plan. Finally, it conducts the specific project design and analysis, which mainly include the selection of equipment such as inverters, DC transformers and DC circuit breakers, the design and analysis of the DC control and protection system, the design and analysis of the over-voltage protection and the configuration scheme of the lightning arrester, and analysis of the system transient characteristics. The design and analysis of the engineering program is a combination of China’s distribution network engineering practice and technical characteristics, which lays a solid foundation for the advancement of the DC power distribution technology in China, and has reference value and demonstration effect for the design and construction of other projects.
Abstract：
The DC distribution system is an important development direction of the distribution system, which can improve the reliability and the quality of the power supply, and support the new energy, the energy storage, the electric vehicles, and the flexible access of AC and DC loads to grid. To realize the demonstration application of the DC distribution technology, China’s first demonstration project of the medium voltage DC distribution network will be built in Zhuhai, Guangdong Province to support the construction of the city energy internet. First, this paper analyzes the demand of the DC distribution network project, and puts forward the construction content and construction target. Then, it designs and analyzes the electrical connection mode, system operation mode, and startup and shutdown mode of the DC distribution network, and proposes the overall project construction plan. Finally, it conducts the specific project design and analysis, which mainly include the selection of equipment such as inverters, DC transformers and DC circuit breakers, the design and analysis of the DC control and protection system, the design and analysis of the over-voltage protection and the configuration scheme of the lightning arrester, and analysis of the system transient characteristics. The design and analysis of the engineering program is a combination of China’s distribution network engineering practice and technical characteristics, which lays a solid foundation for the advancement of the DC power distribution technology in China, and has reference value and demonstration effect for the design and construction of other projects.
QU Lu, YU Zhanqing, SONG Qiang, YUAN Zhichang, ZHAO Biao, YAO Dawei, CHEN Jianfu, LIU Yao, ZENG Rong. 珠海市MVDC配电网示范工程规划分析[J]. Frontiers in Energy, 2019, 13(1): 120-130.
Lu QU, Zhanqing YU, Qiang SONG, Zhichang YUAN, Biao ZHAO, Dawei YAO, Jianfu CHEN, Yao LIU, Rong ZENG. Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai. Front. Energy, 2019, 13(1): 120-130.
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