35kV不接地系统谐振事故及抑制措施仿真分析

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摘  要：该文对一起35 kV不接地系统谐振事故进行分析。通过在PSCAD中搭建仿真模型，模拟电容器组在各种退出方式下PT的电压、电流变化情况。通过事故全过程分析，得出断路器重燃是这次事故的主要原因。针对此次故障，还通过仿真选出合适的谐振抑制措施。

关键词：铁磁谐振;断路器重燃;过电压;PSCAD仿真;故障分析

中图分类号：TM935      文献标志码：A          文章编号：2095-2945（2022）24-0116-06

Abstract： In this paper， a resonant accident of 35 kV ungrounded system is analyzed. By building a simulation model in PSCAD， the voltage and current changes of PT under various exit modes of capacitor banks are simulated. Through the analysis of the whole process of the accident， it is concluded that the reignition of the circuit breaker is the main cause of the accident. In view of this fault， the appropriate resonance suppression measures are selected by simulation.

Keywords： ferromagnetic resonance; circuit breaker reburning; overvoltage; PSCAD simulation; fault analysis

电力系统包含许多电感和电容元件，电感元件有电力变压器、互感器、发电机、消弧线圈及线路导线等，电容元件有线路导线对地电容、相间电容、补偿用的串联和并联电容器及各种高压设备的寄生电容等。（剩余5010字）