湖南电力 ›› 2024, Vol. 44 ›› Issue (4): 93-99.doi: 10.3969/j.issn.1008-0198.2024.04.013

• 新技术及应用 • 上一篇    下一篇

换流站机械式直流断路器的无源化改造方法

文翌铖1, 李洪1, 陈刚1, 张超峰1, 文中华2   

  1. 1.国网湖南省电力有限公司超高压变电公司,湖南 长沙 410004;
    2.国网湖南省电力有限公司水电分公司,湖南 长沙 410007
  • 收稿日期:2024-04-22 修回日期:2024-06-17 出版日期:2024-08-25 发布日期:2024-09-09
  • 通信作者: 文翌铖(1998),男,硕士,助理工程师,主要从事高压开关研究工作。
  • 基金资助:
    国网湖南省电力有限公司科技项目(5216A3230011)

A Passive Retrofit Method for Mechanical DC Circuit Breakers in Converter Station

WEN Yicheng1, LI Hong1, CHEN Gang1, ZHANG Chaofeng1, WEN Zhonghua2   

  1. 1. State Grid Hunan Extra High Voltage Substation Company, Changsha 410004,China;
    2. State Grid Hunan Electric Power Company Limited Hydropower Company,Changsha 410007,China
  • Received:2024-04-22 Revised:2024-06-17 Online:2024-08-25 Published:2024-09-09

摘要: 针对机械式有源型直流断路器存在控制保护逻辑执行过程复杂、器件维护成本高的问题,提出一种换流站机械式直流断路器无源化改造方法,简化控制保护系统中与直流断路器相关的逻辑,取消辅助隔离开关和充电装置,不需要搭建电感器,由转移回路导线上的杂散电感提供所需的电感值,按照无源系统设计对电容器进行升级改造,不仅缩短了开关电流转化时间,减少了避雷器转换能量,同时提高了电容器的使用寿命,降低了直流断路器的故障率。最后,利用MATLAB/Simulink搭建了直流系统仿真平台,仿真结果与理论分析一致,进一步验证了所提直流断路器无源化改造方法的正确性和有效性。

关键词: 机械式直流断路器, 无源化改造, 控制保护系统, 辅助隔离开关, 充电装置

Abstract: To address the complexity of the control and protection logic execution process and the high cost of device maintenance in mechanical active DC circuit breakers, the paper proposes a design method for passive transformation of mechanical DC circuit breaker in converter stations, which simplifies the logic related to DC circuit breakers in the control and protection system, cancels auxiliary disconnecting switches and charging devices, eliminates the need to build a reactor, and provides the required inductance by the stray inductors on the transfer circuit conductor. The upgrading of capacitors in accordance with the passive system design not only shortens the switching current conversion time and reduces the surge arrester conversion energy, but also improves the service life of capacitors and greatly reduces the DC circuit breaker failure rate. Finally, a DC system simulation platform is built using MATLAB/Simulink, and the simulation results are consistent with the theoretical analysis, which further verifies the correctness and effectiveness of the proposed DC circuit breaker passive transformation scheme.

Key words: mechanical DC Circuit breaker, passive transformation, control and protection system, auxiliary disconnect switches, charging equipment

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