串补隔离开关操作引起二次设备故障分析(3)

arc current and arc gap voltage by operation of isolating series compensation switches is greater respectively than those by operation of isolating no-load bus switches.The similarity between the frequency of VFTO and the coupling frequency of the carrier equipment leads to the abnormity and even damage of the carrier equipment by the VFTO coupling from the capacitor voltage transformer.A theoretical analysis model is established for series compensation switches,capacitor voltage transformer and carrier equipment to find out both the coupling path of the VFTO and the cause of the carrier equipment problems.Suggestions are proposed to improve the capacity of MOV for the overvoltage protection and to increase the lead terminals for design,operation and maintenance. Keywords:very fast transient overvoltage;isolating switch;carrier;high frequency cable;voltage transformer;series compensation 中图分类号：TM 文献标志码：A DOI：

10.11930/j.issn.1004-9649.20150167 收稿日期：2017-2-15 作者简介：谭锦鹏（1975—），男，广西梧州人，工程师，从事变电运行维护工作。

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