中国电力 ›› 2021, Vol. 54 ›› Issue (8): 75-82.DOI: 10.11930/j.issn.1004-9649.202003188

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抑制特高压直流系统连续换相失败的非线性动态电流偏差控制

袁博1, 王颖1, 邵华1, 张倩茅1, 秦梁栋2, 刘宁宁3, 戴志辉3   

  1. 1. 国网河北省电力有限公司经济技术研究院,河北 石家庄 050021;
    2. 国网河北省电力有限公司,河北 石家庄 050021;
    3. 华北电力大学 电力工程系,河北 保定 071003
  • 收稿日期:2020-03-27 修回日期:2020-08-03 发布日期:2021-08-05
  • 作者简介:袁博(1989-),男,硕士,高级工程师,从事电力系统规划与控制、信号分析与处理研究,E-mail:2064923239@qq.com;王颖(1975-),女,硕士,高级工程师,从事电力系统规划、系统运行优化控制研究,E-mail:2112805760@qq.com;戴志辉(1980-),男,通信作者,博士,副教授,博士生导师,从事电力系统保护与安全防御研究,E-mail:zhdai@ncepu.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51877084),河北省自然科学基金资助项目(E2018502063),国家电网有限公司科技项目(SGHEJY00GHJS1900023)

A Nonlinear Dynamic Current Deviation Control Method for Suppressing Continuous Commutation Failures in UHVDC Systems

YUAN Bo1, WANG Ying1, SHAO Hua1, ZHANG Qianmao1, QIN Liangdong2, LIU Ningning3, DAI Zhihui3   

  1. 1. Economic and Technology Research Institute of State Grid Hebei Electric Power Company, Shijiazhuang 050021, China;
    2. State Grid Hebei Electric Power Company, Shijiazhuang 050021, China;
    3. Department of Electrical Engineering, North China Electric Power University, Baoding 071003, China
  • Received:2020-03-27 Revised:2020-08-03 Published:2021-08-05
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.51877084), Hebei Natural Science Foundation (No.E2018502063) and Science and Technology Project of SGCC (No.SGHEJY00GHJS1900023)

摘要: 针对特高压直流系统(LCC-HVDC)系统中易发生连续换相失败的问题,提出了一种非线性动态电流偏差控制方法。该方法依据交流故障严重程度动态调整电流偏差控制运行曲线,并利用非线性曲线代替原一次线性曲线,提高熄弧角增量对电流偏差的灵敏度,增大实际熄弧角裕度,进而有效抑制直流系统连续换相失败。PSCAD/EMTDC仿真表明,所提方法能有效抑制各种类型故障导致的连续换相失败,利于故障后直流系统的快速恢复。

关键词: 特高压直流, 连续换相失败, 电流偏差控制, 熄弧角, 故障恢复

Abstract: Aiming at the continuous commutation failures in LCC-HVDC systems, a nonlinear dynamic current deviation control method is proposed. The operation curve of current deviation controller is dynamically adjusted according to the severity of AC faults. Meanwhile, the nonlinear curve is used to replace the original linear curve to improve both the sensitivity of extinction angle increment to the current deviation, and the actual extinction angle margin, thus effectively suppressing the commutation failures of DC systems. The simulation results in PSCAD/EMTDC show that the proposed control method can effectively suppress the continuous commutation failures caused by various faults and can help the rapid recovery of DC system after faults.

Key words: ultra high voltage direct current(UHVDC), continuous commutation failure, current deviation control, extinction angle, fault recovery