The invention provides a
relay protection device constant value state validity automatic checking
system and method, and relates to the technical field of
relay protection. Fixed value information of a protection device and input / exit state information of a
tripping outlet pressing plate are collected through a data collection module,
data processing is carried out, then in a two-way checking engine, a forward character comparison unit carries out character comparison item by item, a reverse logic derivation unit carries out logic relation
verification on state data associated with each fixed value, and finally, the protection device and the
tripping outlet pressing plate are checked. The comprehensive judgment module verifies whether all the association conditions meet the
AND gate relation or not according to the result of the bidirectional check engine, and a final check result is obtained; according to the method, the qualification of the current logic protection circuit to be detected is accurately judged, the detection accuracy is improved,
verification interference caused by misoperation of other circuits is avoided, the accuracy of a
verification result is improved, the misjudgment risk is reduced, and the reliability of
relay protection is improved.