Remote inversion method of internal action logic of protection device

The invention provides a realization method in which intermediate node information correlated to an internal action logic of a relay protection device is uploaded and a visual logic diagram is combined to invert a protection process of the internal logic when there is a fault at a power grid. The provided method can be applied to a power grid fault information system. And the method comprises the following steps that: when there is a fault at a power grid, internal logic operation information of a relay protection device is processed to generate an intermediate node file that can describe the fault in detail; according to an IEC61850-8-1 protocol, the relay protection device uploads the intermediate node file and a fault wave-recording COMTRADE file to a remote fault information master station; and a visual application module loads the intermediate node file, the protection logic diagram file and the COMTRADE fault wave-recording file to demonstrate a protection logic operation situation in the whole fault process. According to the invention, a visual observation means is provided for inversion of an accident in a power system; and a rapid, accurate, and high efficient informational way is provided for accident localization and a fault analysis; therefore, an action process of a relay protection device is hyalinized and the visibility is realized.