高压开关柜局放检测技术的现场应用

Field Application of Detection Technology for High Voltage Switchgear

高压开关柜对其开展局放检测,及早发现绝缘缺陷,意义重大。介绍了暂态对地电压(TEV)及超声波(AE)检测方法,结合现场经验,从声电结合、趋势分析等方面总结了这两种方法在现场的应用;分析了开关柜产生局部放电的原因,给出了广东电网某10 kV开关柜的局放案例分析,案例表明基于TEV和AE原理的检测技术在现场的应用效果较好,为后续的现场检测工作提供参考。

it is very important for high voltage switchgears to carry out partial discharge test so as to find the insulation defects early. Introduction was made to the transient earth voltage（TEV） and acoustic emission（AE） detection methods. Combining with the field experience, this paper summarized the application of two methods from the aspects of the combination of sound and electricity and trend analysis, and analyzed the reasons for the partial discharge of the switchgear, giving the case analysis of 10 kV switchgear partial discharge in certain Guangdong power grid. The case shows that the detection technology based on TEV and AE principles has good application effect on the field, which provides important references for subsequent field detection.