선로정수 추정 결과 기반 상대단 전압/전류 페이저 추정을 활용한 IEC 61850 기반 변전소 간 상대 시각 오차 추정에 관한 연구

Abstract

Time synchronization error between adjacent substations may cause the mal-operation on IEDs. To solve this problem, this paper assumes a situation where time synchronization error occurs between substations due to GPS errors, etc., and estimates the changing transmission line constants due to weather, and uses them to estimate the voltage/current phasor of adjacent substations. The estimated voltage/current phasor of adjacent substation are compared with the IEC 61850-based received voltage/current phasor of adjacent substation to estimate the time synchronization error between substations.