基于故障波形特征的换流阀短路故障定位分析

基于实际在运特高压直流工程模型的实时数字系统仿真（real time digital simulator，RTDS）模拟整流侧和逆变侧换流阀不同区域故障点，分析阀区不同典型故障点产生故障波形特征并给出8种快速判据，同时重点分析单阀短路故障时三种故障时刻下故障波形特征，最后提出一种基于故障波形特征的换流阀短路故障点快速定位方法，在工程现场故障分析时能够快速分析定位故障阀，具有重要工程实际应用价值。

Analysis and localization of short-circuit faults in converter valves based on waveform characteristics

Utilizing the real-time digital simulator (RTDS) based on a practical ultra high voltage direct current (UHVDC) transmission project model,this study simulates different fault points in the converter valves on both the rectifier and inverter sides.The fault waveform characteristics associated with different typical fault points within the valve areas are analyzed,and eight criteria for rapid assessment are presented.Particular emphasis is placed on analyzing the fault waveform characteristics at three distinct moments during a single valve short-circuit fault.Finally,based on fault waveform characteristics,a quick localization method for converter valve short-circuit faults is proposed.This method can swiftly diagnose and pinpoint the fault valves during on-site engineering failure analysis,rendering it invaluable for practical engineering applications.