糯扎渡—广东特高压直流工程中性母线避雷器故障分析及仿真

Fault Analysis and Simulationon Neutral Bus Arrester in Nuozhadu-Guangdong UHVDC Project

对糯扎渡—广东特高压直流工程系统调试过程中发生的中性母线避雷器故障进行了分析,对试验过程中避雷器承受的能量应力进行了仿真计算,并与现场实测结果进行了对比分析。研究结果表明:试验过程中中性母线避雷器吸收的能量占其标称设计能量的11.9%,有较大裕度,电气能量过载不是导致避雷器损坏的原因,避雷器故障应该是个别阀片存在质量缺陷所造成的。

The arrester fault of neutral bus in Nuozhadu-Guangdong UHVDC project during debugging process was analyzed, the energy stress of the arrester was simulated and calculated, whose results were compared with the field measured results. The research results show that the maximum absorption energy of neutral bus＇s arrester during system test is the 11.9% of its nominal designed value and has a large margin, so the electrical energetic overload is not the cause of the arrester fault, but are quality defects of individual valve plates.