Energy Interconnection and Energy Microcirculation System of Terminal Power Grid Based on Low-voltage Flexible DC

被引：0
|
作者：
Liu H. [1 ,2 ]
Dong X. [1 ]
Xiong X. [2 ]
Xu Y. [2 ]
机构：
[1] Department of Electrical Engineering, Tsinghua University, Beijing
[2] State Grid Shanghai Energy Interconnection Research Institute Co., Ltd., Shanghai
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2023年 / 47卷 / 06期
关键词：
distribution network; distribution substation area; energy microcirculation; flexible interconnection; low-voltage DC;
D O I：
10.7500/AEPS20220909002
中图分类号：
学科分类号：
摘要：
Under the goal of "carbon emission peak and carbon neutrality", large-scale distributed photovoltaic, electric vehicle charging piles and other zero-carbon and low-carbon elements are connected to the low-voltage distribution network, which brings challenges to the reliable, stable, and economic operation of the terminal power grid. Based on the low-voltage DC technology, the flexible interconnection and energy reciprocity between distribution substation areas are realized, the new topology of terminal power grid under the new power system is constructed, and the energy microcirculation is used to solve a series of prolems in the current terminal power grid. First, the primary topology and secondary networking mode of low-voltage flexible DC interconnection are introduced to meet the resource endowment and differentiated needs of different low-voltage distribution networks. Secondly, several functional morphologies of the terminal energy microcirculation are described to achieve the operation goals of load balancing and fast fault transfer in different distribution substation areas. Finally, the current project situation in China is summarized, and the first low-voltage flexible interconnection and energy microcirculation project in China is introduced in detail. The project operation situation verifies that the system can effectively improve the reliability and economy of the terminal power grid operation. © 2023 Automation of Electric Power Systems Press. All rights reserved.
引用
收藏
页码：40 / 47
页数：7
相关论文
共 17 条
  • [1] ZHANG Yongjun, YI Yingqi, LI Licheng, Et al., Prospect of new low-voltage distribution system technology driven by carbon emission peak and carbon neutrality targets［J］, Automation of Electric Power Systems, 46, 22, pp. 1-12, (2022)
  • [2] WANG Chengshan, LI Peng, YU Hao, Development and characteristic analysis of flexibility in smart distribution network ［J］, Automation of Electric Power Systems, 42, 10, pp. 13-21, (2018)
  • [3] DONG Xuzhu, HUA Zhuhu, SHANG Lei, Et al., Morphological characteristics and technology prospect of new distribution system ［J］, High Voltage Engineering, 47, 9, pp. 3021-3035, (2021)
  • [4] ZHANG Yongjun, LIU Ziwen, SONG Weiwei, Et al., Networking technology and its application of DC distribution system［J］, Automation of Electric Power Systems, 43, 23, pp. 39-49, (2019)
  • [5] XIONG Xiong, JI Yu, LI Rui, Et al., An overview of key technology and demonstration application of DC distribution and consumption system［J］, Proceedings of the CSEE, 38, 23, pp. 6802-6813, (2018)
  • [6] ZENG Rong, ZHAO Yuming, ZHAO Biao, Et al., A prospective look on research and application of DC power distribution technology［J］, Proceedings of the CSEE, 38, 23, pp. 6791-6801, (2018)
  • [7] ZHANG S H，, Et al., Observer-based DC voltage droop and current feed-forward control of a DC microgrid ［J］, IEEE Transactions on Smart Grid, 9, 5, pp. 5207-5216, (2018)
  • [8] ZHU Lin, ZHAO Xueshen, GUO Li, Et al., Control parameter design of medium-voltage DC distribution system considering dynamic interaction between converters ［J］, Automation of Electric Power Systems, 46, 3, pp. 121-128, (2022)
  • [9] PENG Ke, CHEN Jiajia, XU Bingyin, Et al., Key issues of stability and control in flexible DC distribution system ［J］, Automation of Electric Power Systems, 43, 23, pp. 90-98, (2019)
  • [10] LIU Chuang, ZHANG Yan, ZHU Di, Et al., Medium and low-voltage DC distribution system： impedance modeling and stability analysis of the key equipment［J］, High Voltage Engineering, 47, 11, pp. 3968-3983, (2021)
12