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.
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