• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

ELECTRIC POWER CONSTRUCTION ›› 2022, Vol. 43 ›› Issue (10): 26-36.doi: 10.12204/j.issn.1000-7229.2022.10.003

• Core Equipment of DC Power Grid•Hosted by Associate Professor SONG Qiang, Associate Professor YU Zhanqing and Associate Professor ZHAO Biao• • Previous Articles     Next Articles

DC Fault Ride-Through Coordinated Control Strategies for Bipolar MMC-MTDC System with Wind Power Connected

WANG Zhenhao(), LI Jinlun(), WANG Xinduo(), WANG Wei(), LI Guoqing()   

  1. Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology, Ministry of Education (Northeast Electric Power University), Jilin 132012, Jilin Province, China
  • Received:2022-03-23 Online:2022-10-01 Published:2022-09-29
  • Contact: LI Jinlun E-mail:zhenhaowang@126.com;lijlun@126.com;W15943816700@163.com;wangw_501@qq.com;LGQ@mail.neepu.edu.cn
  • Supported by:
    The National Key Research and Development Program of China(2018YFB0904600)


Because DC system usually adopts overhead line for DC transmission, its failure rate is high. When a single-pole short-circuit grounding fault occurs in the system, the unbalanced power of the fault pole can be transferred to the non-fault pole through the real-bipolar wiring mode. The unbalanced power can be divided into self-absorption and collaborative absorption according to the power margin of the converter station. For the self-absorption situation, fault ride-through can be realized by power transfer between sending end bipolar converter stations. For the situation of collaborative absorption, the coordinated control strategies between converter station and energy dissipation resistance are designed. Considering the limited input time of energy dissipation resistance, unbalanced power in DC System is reduced by sub-sequent generator cutting. Finally, the effectiveness of the proposed control strategy is verified in PSCAD. The simulation results show that the strategy can effectively avoid the expansion of fault range and ensure the safe operation of the system.

Key words: flexible high voltage direct current, real-bipolar wiring mode, fault ride-through, coordinated control strategy, unbalanced power

CLC Number: