电网技术2016，Vol.40Issue(9)：2910-2916,7.DOI:10.13335/j.1000-3673.pst.2016.09.046
应用正向传输系数的GIS局部放电UHF传感器布置方式现场校核方法
A Field Calibration Method for UHF Partial Discharge Detection Sensor Arrangement in GIS Based on Forward Propagation Coefficient
舒胜文 1陈金祥 1陈彬 1叶兆平 1游浩 1黄海鲲1
作者信息
- 1. 国网福建省电力有限公司电力科学研究院，福建省福州市 350007
- 折叠
摘要
Abstract
In order to ensure effectiveness of ultra-high frequency (UHF) method in on-line monitoring of partial discharge for gas-insulated metal-enclosed switchgear (GIS), this paper proposes a field calibration method for UHF partial discharge detection sensors in GIS based on forward propagation coefficient in microwave network theory, often known asS21 parameter. Firstly, on a full- scale test platform based on 252 kV GIS equipment,S21 parameters between two UHF sensors were measured, and transfer functions between two UHF sensors were calculated indirectly with pulse injecting method. The results show that a good agreement between their frequency spectrum characteristics was obtained. On this basis, similarity betweenS21 parameter and frequency spectrum characteristics of partial discharge with different defect types was studied. The results show thatS21 parameter can effectively reflect receiving performance of UHF sensors for partial discharge signals. Then, criterion of the proposed method corresponding to 5 pC detection sensitivity was measured, meeting requirement ofS21 parameter mean value (Sav) more than−75 dB. Finally, the proposed method was applied to field calibration for arrangement of partial discharge online monitoring UHF sensors in an 1100 kV GIS with satisfactory results. Research results provide suggestions for differentiated UHF sensor layout used in on-line monitoring and live-inspecting of partial discharge for GIS.关键词
气体绝缘金属封闭开关设备/局部放电/特高频/传感器/正向传输系数/现场校核Key words
GIS/partial discharge/UHF/sensor/forward propagation coefficient/field calibration分类
信息技术与安全科学引用本文复制引用
舒胜文,陈金祥,陈彬,叶兆平,游浩,黄海鲲..应用正向传输系数的GIS局部放电UHF传感器布置方式现场校核方法[J].电网技术,2016,40(9):2910-2916,7.
