一种加载短路针的小型化气体绝缘组合电器内置特高频传感器

发布时间：2018-02-27 11:36

本文关键词： 局部放电短路针特高频气体绝缘组合电器内置传感器　出处：《电工技术学报》2017年06期 　论文类型：期刊论文

【摘要】：基于安全考虑及内置特高频传感器小型化、回波损耗小、灵敏度高的要求,设计了一种带短路针的气体绝缘组合电器(GIS),内置特高频传感器。通过仿真计算研究短路针数量、短路针位置对传感器的影响,结合GIS法兰尺寸确定最优设计。通过仿真及试验研究,对影响传感器的各项性能参数进行了探讨,结果表明:对于110k V GIS短路针数量为4、且短路针距离圆心距离为40mm时,回波损耗和灵敏度达到最优。在实验室对传感器高低温耐受、气密性检测及局部放电检测效果进行了验证,结果表明:本文研制的传感器高低温耐受循环、气密性检测效果好,对GIS内部典型局部放电具有良好的响应特性和较高的检测灵敏度,能够检测到清晰的特高频局部放电波形,且检测信噪比均大于10。
[Abstract]:Based on the requirements of safety considerations, miniaturization of built-in UHF sensors, low return loss and high sensitivity, a gas insulated composite electrical apparatus with short circuit pin is designed, which is equipped with UHF sensors. The number of short-circuit needles is studied by simulation. The influence of the short circuit pin position on the sensor, combined with the GIS flange dimension to determine the optimal design. Through simulation and experimental study, the effects of sensor performance parameters are discussed. The results show that when the number of 110kV GIS short circuit needles is 4, and the distance from the center of the short circuit pin is 40mm, the echo loss and sensitivity are optimized. The effect of gas tightness detection and partial discharge detection is verified. The results show that the high and low temperature tolerance cycle of the sensor developed in this paper is good, and the gas tightness detection effect is good. It has good response characteristics and high detection sensitivity to typical partial discharges in GIS. The UHF PD waveforms can be detected clearly and the signal-to-noise ratio (SNR) is higher than 10.
【作者单位】：武汉大学电气工程学院;国网北京电科院;
【分类号】：TM595

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