Power Phase Based on PD Detection Method in the Three-Phase Cylindrical GIS

doi:10.11985/2018.04.007

Abstract

Abstract:

The power phase plays an important role in the partial discharge (PD) monitoring device for pattern recognition. The rate of recognition to discharge types in the current PD monitoring devices is low, especially in the three-phase barrel GIS. Based on the synchronization signal, a PD recognition method in the three-phase common GIS is presented for the above problem in this paper. Firstly, the existing synchronization signal is used, and then it is converted to be the other two-phase PD data by the phase-shift factors. Furthermore, it is compared with date base of PD features, the PD type of the highest recognition rate will be output. This scheme is very simple to implement and has the flexibility and high PD type determination in engineering applications.

Key words: PD monitoring, power frequency synchronization, pattern recognition, three-phase barrel GIS, high voltage equipment

CLC Number:

TM855

Guo Xu,Mu Jiqing,Wang Qingjun,Yong Mingchao,Wang Weijie,Mao Lina. Power Phase Based on PD Detection Method in the Three-Phase Cylindrical GIS[J]. Journal of Electrical Engineering, 2018, 13(4): 46-52.

Figures/Tables 13

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序号	特征名称
f₁	工频正半波局放图像二阶广义维数归一化值
f₂	工频负半波局放图像分维数归一化值
f₃	工频负半波局放图像二阶广义维数归一化值
f₄	工频正半波局放图像灰度重心横坐标
f₅	工频正半波局放图像灰度重心纵坐标
f₆	工频正半波局放图像主轴方向特征参数
f₇	工频负半波局放图像灰度重心横坐标
f₈	工频负半波局放图像灰度重心纵坐标
f₉	工频负半波局放图像主轴方向特征参数
f₁₀	工频正、负半波放电图像的相关系数
f₁₁	第Ⅰ象限的放电集中度
f₁₂	第Ⅰ、Ⅱ象限不对称度
f₁₃	负半周放电总次数峰度
f₁₄	负半周放电总次数偏度
f₁₅	相位区域平均值
f₁₆	正半周放电总次数峰度
f₁₇	正半周放电总次数偏度
f₁₈	第Ⅲ象限的放电集中度
f₁₉	负半周放电强度峰度
f₂₀	负半周放电强度偏度
f₂₁	正半周放电强度峰度
f₂₂	正半周放电强度偏度

等宽离散化程度	特征组合	识别率(%)
4	1,5,6,10,13,21	95.745
5	1,2,5,6,12,21	97.872
6	1,5,6,13,17,21	94.681

放电类型	识别率(%)
尖端放电	96
颗粒放电	94
气隙放电	91
悬浮放电	90

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