中国电机工程学报2017，Vol.37Issue(15)：4538-4547,10.DOI:10.13334/j.0258-8013.pcsee.161574
操作冲击电压下GIS绝缘子表面电荷的积聚特性
The Accumulation Characteristic for Surface Charge on GIS Insulator Under Switching Impulse Voltage
摘要
Abstract
Under the actual operating conditions of Gas Insulated Substation (GIS),the insulator might withstand switching impulse voltage,leading the charge accumulating on the surface of insulators.The accumulated surface charge can not only distort the distribution of electric field but also provide charge for further discharge along the surface,which is the key factor for the flashover of GIS insulator.Based on an actual 252kV GIS insulator,a set of surface charge measurement system utilizing the static capacitive probe was set up in this paper.According to which,the accumulation characteristic of surface charge under switching pulse voltage and their variation conditions by the influence of amplitude and applied times of voltage were obtained in this paper.The experimental results show that:there are both positive and negative charges accumulating on the surface of insulator,no matter under positive or negative voltage and the amplitude of accumulated negative charge is much larger than that of positive ones,especially under positive voltage;however,the distribution of surface charge under negative voltage showed more uniformity.With the amplitude of applied voltage increasing,the accumulated surface charge had an obvious increase under positive voltage,and the maximum is-0.52.tC/m2,but under negative voltage,the trend of accumulated surface charge is to increase at first then decrease,under which the maximum can reach-0.16tC/m2.The surface charge increases obviously as the applied time of voltage increases under positive voltage,while there is little increase for the surface charge under negative voltage.The conclusion reached in this paper could provide a further emphasis on importance of the insulating issues caused by the surface charge accumulation and a reference for the optimal design of GIS insulators.关键词
气体绝缘金属封闭开关设备/盆式绝缘子/表面电荷/操作冲击电压/积聚特性Key words
gas insulated substation (GIS)/basin insulator/surface charge/switching impulse voltage/accumulation characteristic分类
信息技术与安全科学引用本文复制引用
齐波,高春嘉,邢照亮,李成榕..操作冲击电压下GIS绝缘子表面电荷的积聚特性[J].中国电机工程学报,2017,37(15):4538-4547,10.基金项目
国家重点基础研究发展计划项目(973项目)(2014CB239502).The National Basic Research Program of China (973 Program) (2014CB239502). （973项目）
