特高压直流换流变压器局部放电的现场判定与定位

On-site Detection and Location of Partial Discharge in Ultra-High Voltage Convert Transformer

特高压换流变压器在现场安装完毕后局部放电超标时,需采用有效的方法对局部放电做出正确的判断和准确的定位。采用传统电气方法和新兴技术相结合的局部放电综合判断和定位方法,准确地定位了宜宾换流站极I低端YY-B相换流变压器的局部放电缺陷,有效地指导了缺陷处理。结果表明将传统的电气方法与超声波、紫外线等新兴技术有机地结合,可有效提高局部放电判断的正确性和定位的准确性。

An effective method to detect and locate partial discharge （PD） in convert transformer accurately is important when PD exceeds standard after installation. Using comprehensive method combined traditional method with emerging technology, the partial discharge in LYB convert transformer which installed in polar I of YIBIN convert station is located successfully. The online location gives an effective instruction to the default treatment. The result shows that combination of traditional electrical method and emerging technology such as ultrasonic and uhraviolet can enhance detection and location accuracy for PD in convert transformer.