秦冰阳,司 雯,李斯盟,李岩,梁园斌,亓占华.局部放电检测用D-dot探头的可行性研究[J].电测与仪表,2016,53(6):. QIN Bingyang,SI Wen,LI Simeng,LI Yan,Liang Yuanbin,Qi Zhanhua.Feasibility Study of D-dot Probe Used for the Detection of Partial Discharge[J].Electrical Measurement & Instrumentation,2016,53(6):.
局部放电检测用D-dot探头的可行性研究
Feasibility Study of D-dot Probe Used for the Detection of Partial Discharge
In order to do online monitoring and pattern recognition for partial discharge generated in electrical equipments such as switchgear and so on, a kind of D-dot probe for monitoring the PD signal is designed in this paper. ThreeStypical modelsSofSpartialSdischarge are set up and the PD signal is measured by the probe and impulseScurrentSmethod at the same time. The probe’s reliabilitySis verified by comparing the PD signal with impulseScurrentSmethod. The relationship between signal attenuation of high-low frequencyScomponent and the radiation distance is researched. The conclusions are as follows: 1) The phaseSdistribution of PD pulse can be well reflected by the D-dot probe. 2) There is a linearSrelationshipSbetween the amplitude of D-dot signal and the peak-to-peak value (VPP) of impulse voltage. Meantime, there is a square relationship of VPP of impulse voltage and the cumulative energy of D-dot signal. The scale factors vary from one PD model to the others, so the PD types can be differentiated. 3) The high frequency components of D-dot PD signals attenuate quickly as the radiation distance increases, while the low frequency components attenuate slowly.
