DC Short Circuit Current-limiting Method Based on MMC Submodule Two-stage Active Control

被引：0
|
作者：
Wang Z. [1 ]
Zhao X. [1 ]
Wang C. [1 ]
Sun Y. [1 ]
Wang W. [1 ]
Li G. [1 ]
机构：
[1] Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Northeast Electric Power University, Ministry of Education, Jilin
来源：
Gaodianya Jishu/High Voltage Engineering | 2023年 / 49卷 / 02期
关键词：
current-limiting; DC fault; fault detection; MMC; sub-module control;
D O I：
10.13336/j.1003-6520.hve.20211470
中图分类号：
学科分类号：
摘要：
The short circuit current rises sharply after the DC-link fault of the modular multilevel converter (MMC), which seriously affects the safety of the DC grid. In this paper, a submodule two-stage active control (STAC) is proposed for this issue. According to the two-stage fault detection criterion and the preset maximum short-circuit current, the piecewise function K of the direct current is constructed, which output decides to reduce the proportional coefficient of the cast sub-mode to reduce the DC voltage and suppress the short-circuit current. In addition, the control parameters of MMC converter which under various conditions are designed for economize the cost of current limiting control strategy. The STAC does not affect the normal operation of the system and it can maintain power transmission during current limiting. Finally, the current limiting effect and performance of STAC are simulated and analyzed in the four-terminal DC grid. The results show that the current limiting method proposed in this paper effectively suppresses the fault current. The fault current flowing through the DC circuit breaker is reduced by 49.7%, the peak current of the bridge arm is reduced by 23.15%, and the DC voltage is restored 100ms after the fault. © 2023 Science Press. All rights reserved.
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页码：691 / 701
页数：10
相关论文
共 23 条
  • [1] XU Zheng, LIU Gaoren, ZHANG Zheren, Research on fault protection principle of DC grids, High Voltage Engineering, 43, 1, pp. 1-8, (2017)
  • [2] YANG Saizhao, XIANG Wang, WEN Jinyu, Review of DC fault protection methods for the MMC based DC grid, Proceedings of the CSEE, 39, 22, pp. 6600-6616, (2019)
  • [3] HE Zhiyuan, LU Jingjing, LIU Tianqi, Et al., Key technologies and prospect of fault current suppression in flexible DC power grid, Automation of Electric Power Systems, 45, 2, pp. 173-183, (2021)
  • [4] PEREZ M A, CEBALLOS S, KONSTANTINOU G, Et al., Modular multilevel converters: recent achievements and challenges, IEEE Open Journal of the Industrial Electronics Society, 2, pp. 224-239, (2021)
  • [5] PAN Yuan, CHEN Lixue, YUAN Zhao, Et al., Research on current limiting and energy limiting technology for DC power grid fault, Proceedings of the CSEE, 40, 6, pp. 2006-2015, (2020)
  • [6] DU Xiaolei, GUO Qinglei, WU Yankun, Et al., Research on control system structure and coordination control strategy for Zhangbei demonstration project of MMC-HVDC grid, Power System Protection and Control, 48, 9, pp. 164-173, (2020)
  • [7] LI Guoqing, SONG Zhenzi, WANG Guoyou, Asymmetric full bridge sub-module topology of MMC with DC fault blocking capability, High Voltage Engineering, 45, 1, pp. 12-20, (2019)
  • [8] WANG Yuhong, FU Yuntao, ZENG Qi, Et al., Review on key techniques for fault protection of flexible DC grids, High Voltage Engineering, 45, 8, pp. 2362-2374, (2019)
  • [9] YAN Sheng, LUO Xiang, HE Zhiyuan, Prospect of core equipment and key technology for DC power grid, Automation of Electric Power Systems, 43, 3, pp. 205-215, (2019)
  • [10] YANG Yuemin, XU Chaoqun, LIU Yuchang, Et al., Principle and development of 400 kV DC energy dissipation device based on IGCT composite module directly connected to concentrated resistance, High Voltage Engineering, 48, 4, pp. 1510-1517, (2022)
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