低电压法现场测量GIS隔离开关操作VFTO
Low-Voltage Field Measurement for GIS DS Switching VFTO
邢连中 1钱忠 1吕兆俊 1徐晔1
作者信息
- 1. 上海电力股份有限公司,上海200010
- 折叠
摘要
介绍在GIS现场采用低电压法测量550 kV GIS隔离开关操作VFTO(特别快速暂态过电压)的试验过程,测试结果用于验证EMTP数值计算参数的选取并修正,使550 kV GIS隔离开关操作VFTO波形和幅值的预测更为精确,指导和验证隔离开关重击穿燃弧时对地放电防治的设计.提出了推广在GIS现场安装后采用低电压法测量VFTO的建议,用于校验隔离开关设计、GIS及变压器等绝缘配合.
Abstract
This paper introduces the testing process of low-voltage measurement method for 550kV GIS disconnector switch (DS) switching VFTO(very fast transient overvoltage) on site.The test results are adopted for checking and modifying the parameters used in EMTP calculation,in order to ensure the more accurate estimation of the VFTO waveform and peak value during 550 kV GIS DS switching operation,and provide the guidance and validation of the discharge control design in the case of DS restriking ground flashover fault.Then it is suggested to apply the low-voltage measurement for VFTO after the on-site GIS installation for checking the insulation coordination among DS design,GIS,tansformer,etc.
关键词
气体绝缘开关设备/隔离开关/VFTO/低电压/测量Key words
gas insulated switchgear/disconnector switch/VFTO/low-voltage/measurement引用本文复制引用
出版年
2014
NETL
NSTL
维普
万方数据