Breaker control scheme for rebuilding networks containing distributed generation following system disturbances

Following a system disturbance when there is a loss of grid, under current UK practice, all distributed generators have to be disconnected automatically from the network in less than 500 msecs and remain disconnected until the normal grid supply is restored. They can then be resynchronised and reconnected to the grid supply. However, these distributed generators offer the potential to maintain supplies to consumers during loss of grid, an opportunity which is currently being lost. This paper explores new techniques to enable distributed generators in distributed networks to provide continuity of supply during power system disturbances which result in loss of grid, and thereby enhances the quality of supply to consumers.