新型GIS局放超高频传感器抑制干扰的研究  

Study on Anti-interference with New Type GIS PD Ultra-High Frequency Signal Sensor

作　　者：李信[1] 李成榕[1] 丁立健[1] 杨静[1] 赵清娇[1] 沈小军[1] 

机构地区：[1]华北电力大学电力工程系,北京102206

出　　处：《高电压技术》2004年第2期37-39,共3页High Voltage Engineering

摘　　要：利用一种新型的便携式超高频 (UHF)传感器对GIS局放在线监测可能遇到的干扰模型进行抗干扰试验 ,其中包括 :高压导体上的金属尖刺及接触不良、接地体之间的接触不良、沿面闪络及无线电通讯信号。利用UHF传感器对各个模型进行抗干扰实验 ,通过对放电的常规信号和UHF信号的比较表明 :新研制的UHF传感器可抑制空气中高压导体上的金属尖刺的电晕和沿面闪络的干扰 ,无法抑制无线通讯信号和空气中高压端悬浮电位产生的干扰 ,可通过相位信息给予解决。Utilizing new-type portable GIS partial discharge ultra-high frequency signal sensor, this paper presents the experimental research on anti-interference of the UHF sensor for on-line monitoring of partial discharge(PD) in gas-insulated-substation(GIS). The possible interference models are designed, which include the big and small protrusion on the high voltage conductor, the floating electrode of high voltage conductor and grounding conductor, creeping flashover and radio communication signals. With the interference models, comparing the conventional signals with UHF signals, the conclusion is that UHF method, whose low cutoff frequency is 500 MHz, can reject the interference caused by protrusion on the high voltage conductor, creeping flashover. Although radio communication signals as well as the interference come from the floating electrode of high voltage conductor in air cannot be rejected, they can be identified by the information of the phase-resolved patterns.

关 键 词：全封闭组合电器 GIS 局部放电 信号干扰 超高频传感器 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]