光电流互感器在舟山多端柔性直流输电工程中的应用问题分析

摘要

介绍了舟山±200 kV多端柔性直流输电工程换流站光TA(电流互感器)配置和应用情况。通过对换流站内不控充电启动试验的波形分析，找出了光TA电流异常原因，给出了整改方案。进行了一次注流试验验证并最终通过站系统的OLT试验和STATCOM试验验证了方案的正确性。指出在柔性直流输电工程中对于光TA的测试，除了传统的精度试验外，必须增加有针对性的一次注流试验。%The paper introduces configuration and application of optical TA(current transformer) in converter station of Zhoushan ±200 kV multi-terminal flexible DC (direct current) transmission project. By waveform analysis of the non-controlled charging and startup test, the reason of abnormal TA current is detected and the rectification scheme is presented. A current injection test is conducted for verification, and the effective-ness of the scheme is verified by OLT (open line test) test and STATCOM (static synchronous compensator) test substation system. The paper indicates that t in addition to traditional precision test there must be an ad-ditional current injection test for optical TA test.