Station Protection Scheme Based on Logic Judgment

Using the protection action information uploaded by the interval layer protection device, a station domain protection scheme based on logic judgment is proposed is this paper, including transformer protection logic, high voltage bus protection logic, medium voltage bus protection logic and low voltage bus protection logic. Each protection logic uses the protection action signals on both sides of the protected component to identify the fault, and uses the remote backup protection action signal of the protected component to check the fault judgment result, and eliminate the influence of the individual protection component malfunction on the fault judgment result. Each protection logic does not depend on each other and can be executed separately to meet the actual engineering test and maintenance requirements.