电气设备局部放电检测技术述评

Review on Partial Discharge Measurement Technology of Electrical Equipment

局部放电检测被认为是电气设备最为重要和有效的绝缘状态评估方法,在电气设备绝缘状态的诊断和评估中得到了大量的研究和应用。从局部放电的检测方法、缺陷类型的模式识别及局部放电源的定位等几个方面进行归纳,综述了这些方面近年来的重要研究成果。讨论了带电检测和在线监测、不同检测方法的局限性、局部放电源的危险程度评估方法及不同类型电压作用下局部放电的检测等目前局部放电研究及实践中存在的问题,提出了今后研究和应用中可能的发展方向。认为应加强在线监测系统的可靠性和准确性,研究不同检测方法对不同缺陷检出的有效性,研究对局部放电检测结果更为合理和科学的评估方法,并进一步深入研究不同类型电压作用下的局部放电特性和检测方法。

Partial discharge （PD） detection is recognized as one of the most effective and most important methods of in- sulation condition assessment. It is widely studied and applied in the insulation diagnosis and evaluation of power equipment. From the aspects of PD detection methods, defect pattern recognition and PD source location, the recent de- velopments of PD detection are reviewed and summarized. Moreover, some popular concerns in current researches and applications of PD detection are discussed, including on-line monitoring and live detection, limitations of different detec- tion methods, risk assessment of PD sources, and PD detection for equipment under different types of voltage. Suggestions are proposed for guiding possible future research and applications： it is necessary to enhance the reliability and accuracy of online monitoring systems, evaluate the effectiveness of different methods in detecting different defects, develop evaluation methods of PD detection results that are more reasonable, and further research the PD characteristics and PD detection method according to situations of different voltage waveforms.