Implementation of an active fault level monitoring system for distributed generation integration

This paper describes the practical implementation of an active fault level monitoring system to facilitate the integration of distributed generation (DG) within 11kV distribution networks. The system is being tested in the UK by a consortium comprising Western Power Distribution, Parsons Brinckerhoff, S&C Electric Company and Outram Research Limited. Laboratory tests were conducted for a variety of system fault levels and network running arrangements. Results from the laboratory tests showed that the fault level was consistently predicted to be within 4.5% of measured three-phase faults applied to the system.