韶山换流站站用电备自投逻辑分析及改进建议

Analysis and Improvements of the Spare Power Source Self-inputting Logic at Shaoshan Converter Station

站用电系统作为换流站辅助系统的重要组成部分,其可靠性直接影响直流系统的安全稳定运行。本文介绍了韶山换流站站用电系统组成和运行方式,详细分析了备自投系统的切换逻辑、投切判据及其联锁条件。结合韶山换流站10 k V站用电备自投试验过程中出现的问题,深入分析了备自投电气联锁与软件联锁存在的配合问题,提出了实际有效的解决方案,为其它工程提供借鉴。

As an important part of auxiliary system at converter station,the reliability of station power supply system directly affects the safe and stable operation of HVDC.This paper introduces the composition and operation of station power supply system at Shaoshan converter station,analyzes the spare power source self-inputting logic and its switching criterion and the interlocking condition in detail.Combined with Shaoshan converter station 10 kV station power supply system from the test process problems,the paper analyzes the coordinate problem with the electrical interlocking and software interlock in the spare power source self-inputting logic in depth,puts forward practical and effective solutions,and provides reference for other projects.