Fault application system design for a 25kV distribution test feeder

A 25kV distribution test line has been developed at IREQ that includes four distributed generators, controllable loads, and a storage system. The test line has advanced protection equipment and a simple fault application system that can generate bolted SLG faults. However, to test advanced devices and new protection schemes, different non-bolted faults need to be emulated. This paper discusses the design of the fault application system that can produce controllable impedance faults at different points on the wave. The simulation results are presented, which illustrate the design.