The invention discloses a fault inversion-based extra-
high voltage direct-current protection device and
system. The method includes the following steps that: S1, the historical fault information of adirect-current
transmission system is acquired and synchronized; S2, corresponding fault inversion configuration information is determined: a protection
measurement point table, a control and protection information point table and a protection constant value table are established; S3, a protection
function type to be tested is selected; S4, test quantity data under a corresponding fault operationstate and direct-current
control system control
information data are generated based on the fault inversion configuration information according to the protection
function type to be tested, and the test quantity data and direct-current
control system control
information data are transmitted to an extra-
high voltage direct-current protection device to be tested; S5, protection logic operation and pre-judgment are performed to obtain the theoretical action behavior data of the direct-current protection device to be tested; S6, the actual action behavior data of the protection device to be testedare obtained; and S7, the actual action behavior data are compared with the theoretical action behavior data, so that the whether the corresponding protection function of the direct-current protection device to be test meets requirements can be judged. With the fault inversion-based extra-
high voltage direct-current protection device and
system of the invention adopted, the extra-high
voltage direct-current protection device can be independently and effectively tested, and a guarantee can be provided for the long-term safe and stable operation of the direct-current
protection system.