TEV与超声波法在开关柜局部放电检测中的应用

Probe into Partial Discharge Detection and Location of Switchgear Based on TEV and Ultrasonic Wave Methods

高压开关柜的安全可靠运行直接影响整个变电站的供电可靠性,对开关柜进行局部放电检测尤为重要。设计了针板放电、内部放电、悬浮放电和沿面放电4种典型的局部放电模型,通过模拟实验,采用TEV与超声波相结合的方法实现了局部放电源的定位,经验证该方法精确度较高,对局部放电检测有一定的实用价值。

The safe and reliable operation of high voltage switchgear directly influenees the reliability of the whole substation＇s power supply, so the partial diseharge detection of HV switchgear is partieularly important. This paper gives 4 kinds of typical partial discharge models of needle plate discharge, interior diseharge, stable-nail discharge and surface discharge, establishes an experimental platform of partial discharge detection based on the combination of TEV and Ultrasonic method to local the orientation of the partial discharge source through sinmlation experiments. This method proposed in the paper is of high accuracy and has practical value.