直流输电系统交流PLC噪声滤波器原理、常见故障及运维策略

Principle,Common Faults and Operation and Maintenance Strategy of AC PLC Noise Filter for DC Transmission System

直流输电系统交流PLC噪声滤波器长期工作在换流阀产生的高频谐波谐振区域附近,滤波器某些部件因过热、老化等故障而损坏,导致直流非计划停运。以±500 kV桂中换流站为例,介绍了交流PLC噪声滤波器的基本原理、常见故障,从而提出针对性的运维策略,供其他直流工程运维工作参考。

The AC PLC noise filter of DC transmission system works near the high frequency harmonic resonance region produced by converter valve for a long time.Some parts of the filter are damaged due to overheating,aging and other faults,which will lead to unplanned DC outage.Taking±500 kV Guizhong converter station as an example,the basic principle and common faults of AC PLC noise filter are introduced.Thus,the targeted operation and maintenance strategy is put forward for reference of other DC project operation and maintenance work.