Performance Testing of Device for Single-phase-to-ground Fault in Power Distribution System with Neutral Non-effectively Grounded Based on True Test Platform

This paper introduces the 10 kV true test platform, which has the characteristics of polymorphic reconstruction of grid structure, flexible switching of grounding methods, one key sequential control of test scenarios, and flexible reproduction of polymorphic faults. It solves the problem of difficult reproduction of real faults in distribution networks. Through the true test platform, comprehensive true testing of new technologies and methods in the distribution network can be carried out. We replicated different transition resistance grounding and intermittent arc grounding faults in the distribution network using an true test platform, and conducted true testing on a certain model of distribution network grounding fault selection device. The correctness of the device's line selection was verified, and the reliability of the device's long-term operation was verified. Through the construction and operation of the true test platform, the problem of incomplete assessment of new equipment in the distribution network has been effectively solved, promoting the application of new technologies and methods in the distribution network, and supporting the comprehensive improvement of power supply reliability in the distribution network.