基于特高频传感器的GIS局放信号监测装置及定位方法

doi:10.11985/2022.01.030

摘要/Abstract

摘要：

GIS局部放电监测与局放源定位是预防绝缘事故的主要手段。针对目前定位方法存在的成本高、布线难等问题,提出一种基于特高频传感器的GIS局放监测装置与定位方法,通过在GIS本体和周围空间部署特高频传感器获取放电信号。利用特高频累积平均信号强度及特征相似度方法,排除空间放电信号的干扰,识别GIS内部局部放电信号。结合传感器与GIS的空间拓扑关系,根据特高频信号强度,实现放电源的定位。经现场应用,所提方法能够准确定位放电源位置,验证了该定位方法的可行性。

关键词: GIS, 局部放电, 特高频, 定位

Abstract:

Monitoring partial discharge of GIS and determining the location of partial discharge source are important means to prevent insulation accidents. Aiming at the problems of high cost and difficult wiring in current positioning methods, a GIS partial discharge signal monitoring device and localization method is proposed based on UHF sensor. The abnormal electromagnetic signals are sensed by the UHF sensors which are deployed in the GIS body and surrounding space. The UHF cumulative average signal strength and characteristic similarity are used to eliminate spatial interference signals and identify partial discharge signals in GIS. Combined with the spatial topological relationship between sensor and GIS, the position of PD source can be judged according to the signal intensity of UHF. Through field application, the location of PD source is accurately located, which proves the feasibility of the location method.

Key words: Gas insulated switchgear, partial discharge, ultra-high frequency, localization

中图分类号:

TM855

高扬, 沈毅, 夏峰, 蒋昊松, 周阳, 刘丹丹. 基于特高频传感器的GIS局放信号监测装置及定位方法[J]. 电气工程学报, 2022, 17(1): 244-250.

GAO Yang, SHEN Yi, XIA Feng, JIANG Haosong, ZHOU Yang, LIU Dandan. GIS Partial Discharge Signal Monitoring Device and Localization Method Based on UHF Sensor[J]. Journal of Electrical Engineering, 2022, 17(1): 244-250.

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编号	信号强度	累积平均信号强度
1	28.4	5.4
2	44.7	5.7
3	146.1	8.1
4	121.5	9.8
5	5.3	6.2
7	10.4	4.1
9	2 847.1	2 476.3

传感器编号	相似度均值	传感器编号	相似度均值
1-2	0.750 9	2-9	0.245 3
1-3	0.883 8	3-4	0.953 1
1-4	0.908 5	3-7	0.270 2
1-7	0.771 7	3-9	0.314 7
1-9	0.257 1	4-7	0.297 4
2-3	0.793 8	4-9	0.351 6
2-4	0.718 6	7-9	0.753 9
2-7	0.443 5