Exception Handling of Electronic Current and Voltage Transformer in Luding Intelligent Substation
In Luding intelligent substation,the first intelligent substation in Shanghai power grid,there occurred the voltage jump of its electronic current and voltage transformer (ECVT) during the operation.By analyzing the MMS backend voltage curves,combining with the data collected by fault recorder and considering the operation mode,this research compared with single-feeder line voltage,and ruled out preliminarily the possibility of system voltage disturbance.Considering the stepwise fault recording and Gaussian low-pass filter method applied in distributors,the construction personnel found that resonance occurred between the secondary distributor and merging units.By adjusting the parameters,the abnormal voltage jump has been solved.
electronic current and voltage transformervoltage jumpGaussian low pass
NETL
NSTL
万方数据
维普
