500kV line relay protection device detection method and system

The invention relates to a 500kV line relay protection device detection method and system. The method comprises the following steps: receiving a test order of to-be-detected relay protection devices and a test parameter and a standard fixed value of each preset logic protection test case, which are input by a user; acquiring sampling precision of the current to-be-detected relay protection device; generating a test sequence according to the logic protection test case and the test parameter corresponding to the current to-be-detected relay protection device when the sampling precision is greater than a preset precision threshold value; outputting the test sequence to the to-be-detected relay protection device, receiving an action message returned by the to-be-detected relay protection device, and generating detection result information in a preset format of the current to-be-detected relay protection device; generating a detection result of a next relay protection device according to the test order until the detection results of all the to-be-detected relay protection devices are generated. According to the method and the system, the detection accuracy can be effectively improved, the detection steps of testers can be saved, and the time required for detecting 500kV line relay protection devices is shortened.