GIS盆式绝缘子均压环特高频接收特性研究

摘要

With mass application of shielding ring basin-type insulator and constant miniaturization of equipment size,utiliza-tion of gas insulated metal-enclosed switchgear partial discharge ultra-high frequency sensor is greatly restricted and PD UHF detection is becoming difficult day by day. Aiming at above problems,regarding basin-type insulator grading ring as UHF aerial,relationship between loop aerial and factors such as PD apparent discharge magnitude,sensor position and grounding mode was tested. Meanwhile,frequency response characteristics of various UHF sensors were compared and analyzed. It was considered that GIS basin-type insulator grading ring was provided with good UHF receiving characteristic and was feasi-ble to be used for testing GIS PD as UHF aerial.%随着带屏蔽环式盆式绝缘子的大量应用以及设备尺寸的不断小型化,气体绝缘金属封闭开关设备(gas-in-sulated metal-enclosed switchgear,GIS)局部放电特高频法(ultra-high frequency method,UHF)传感器的使用受到了极大限制,局部放电UHF检测日渐困难。针对该问题,以盆式绝缘子均压环作为 UHF天线,测试环形天线(盆式绝缘子均压环)接收特性与局部放电视在放电量、传感器位置、传感器接地方式等因素的关系,并比较分析了各种UHF传感器的频率响应特性。结论认为,GIS 盆式绝缘子均压环具有良好的 UHF 接收性能,用其作为UHF天线进行 GIS内局部放电测试是可行的。