CURRENT DIFFERENTIAL PROTECTIVE APPARATUS AND METHOD FOR PROTECTING BUS-LINE IN SUBSTATION SYSTEM

摘要

Disclosed is a current differential bus line protection technology in a substation system enabling to determine a more precise failure by correcting a sampling rate and a phase angle difference which are provided in multiple merging units respectively in a different way. According to the present invention, the current differential bus line protection technology in the substation system is configured to include a discriminating unit, a timing signal generating unit, an effective set generating unit, a protection set generating unit, a phase angle compensating unit, and a protection motion operating unit. [Reference numerals] (AA) Start; (BB) End; (S100) Prepare protection motion; (S200) Generate a valid timing signal set and a protection timing signal set; (S300) Correct the phase angle of the valid timing signal set; (S400) Perform the protection motion using the protection timing signal set