暂态地电压法与特高频法在局放检测中的应用

为了解决开关柜局部放电问题,在35 kV开关柜局部放电检测中,联合应用暂态地电压法与特高频法确定开关柜内部缺陷性质,通过特高频平分面及时差法进行定位分析,确定开关柜内部缺陷位置,为解体分析提供充分依据。应用结果表明:暂态地电压法与特高频局放检测技术的联合应用,可以实现不同检测手段的互相补充,更有利于开关柜缺陷检测。

Application on transient earth voltage method integration with ultra high frequency method in partial discharge detection of switch cabinet

In order to solve the problem of partial discharge of switch cabinet, in partial dischargedetection of 35 kV switch cabinet, applies transient earth voltage (TEV) method and ultra highfrequency (UHF) method to confirm the internal defect characteristic of switch cabinet, further makesorientation analysis by UHF vertical- mid- plan method and time difference method to confirm theinternal defect position of switch cabinet, provides sufficient basis for disassembly analysis. Theapplication result shows that the combined application of TEV method and UHF method can realizethe mutual supplement for different detection methods, has more beneficial for internal defectdetection of switch cabinet.