Performance Testing of Device for Single-phase-to-ground Fault in Power Distribution System with Neutral Non-effectively Grounded Based on Real-time Digital Simulation

Single-phase-to-ground fault is the most common type of fault in power distribution system with neutral non-effectively grounded, but the on-site operation of grounding line selection devices often fails to meet application requirements, affecting the fast and accurate handling of single-phase-to-ground faults. Considering the numerous manufacturers and diverse device types of low current grounding wire selection, it is difficult to visually evaluate the lines selection performance of different devices and make horizontal comparisons. The selection and application of on-site line selection devices lack supporting basis. To this end, a testing platform for grounding line selection devices was built based on real-time digital simulation systems (RTDS), and testing work on line selection devices from a certain manufacturer was carried out. Through comprehensive testing in fault scenarios, some support was provided for the line selection and application of grounding selection devices.