Localized Equipment Calibration Technology for Substation Relay Protection Considering Electromagnetic Interference

Abstract At present, the conventional localized equipment calibration technology mainly adopts manual way to check parameters, which leads low accuracy due lack of analysis error sources. In this regard, for substation relay protection considering electromagnetic interference is proposed. The value calculated by simulating a high-precision unit, designing pre-circuit fast voltage and current sampling, analyzing source. experimental results show that proposed technique can effectively reduce delay characteristic has high accuracy. average lower than 23%.