基于UHF/SHF与X光激励联合的GIS局部放电定位方法及工程应用

GIS Partial Discharge Location Method Based on the Combination of UHF/SHF and X-ray Excitation and Its Engineering Application

研究SF_6组合电器局部放电检测与精确定位方法对提高设备检修效率具有重要意义。文中针对某些特殊情况下GIS局部放电的精确定位难题,首先研制了宽频带UHF(0.7~4 GHz)等角螺旋天线新型传感器,提出了基于多次加权平均的局部放电波形综合处理与时延定位算法,并建立了基于X光激励的局部放电缺陷辅助确认方法。以220 kV某站2号变高GIS间隔局部放电缺陷现场定位为例,相比于现有常用特高频定位方法,实践证明,文中提出的综合诊断方法对某些特殊情况的局部放电精确定位更加有效。

Study on SF6 combination of electrical partial discharge detection and precise location is of great significanceto improve equipment maintenance efficiency. In this paper,some special cases GIS partial discharge pinpoint prob-lems,first,a new type of wideband UHF（0.7-4 GHz）equiangular spiral antenna sensor is developed,and compre-hensive treatment and delay times based on the weighted average of the positioning of the partial discharge waveformalgorithm are proposed,and a method for auxiliary confirmation of partial discharge defects based on X-ray excita-tion is established. Taking the spot location of GIS partial discharge defect in the 220 kV station No. 2 transformer asan example,compared with the existing UHF location method,it has been proved that the integrated diagnosis meth-od proposed in this paper is more effective for the precise location of partial discharge in some special cases.