Power frequency magnetic field immunity capability detection system and method of relay protection device

The invention relates to the technical field of power system relay protection electromagnetic compatibility tests, and provides a power frequency magnetic field immunity capability detection system and method for a relay protection device, and the system comprises the relay protection device, a relay protection tester, a power frequency magnetic field tester, a switch, and a PC. The relay protection device is arranged in a magnetic field coil of the power frequency magnetic field tester, the relay protection tester and the switch are arranged outside the magnetic field coil, the PC is connected with the relay protection device through an Ethernet twisted pair via the switch, and the PC receives sampling data of the relay protection device and calculates and analyzes the sampling data. An automatic test-analysis environment is established by using the relay protection device and the PC, the relay protection device sends out sampling values point by point through the internet access, the PC receives the samplin