Distributed power generation

摘要

Distributed power generation systems generally include a number of power sources and electrical power loads interconnected by a distribution network. Electrical switches and fuses are provided such that local groups of power sources and power loads can be established. Should there be a degradation in the distribution network in terms of a set of criteria such as electrical frequency, current or voltage then the switch or fuse may be thrown to establish each local group as an island. By monitoring divergence from a set of criteria a method and controller may be utilised whereby the distribution network as a whole is considered and configured to establish virtual islands which operate prior to the establishment whether inadvertently or deliberately of actual islands within the distribution network. In such circumstances the transition from normal operation for the distribution network to islanded operation for the distribution network is less severe.

主权项

1. A method of operating a distributed power generation system comprising a plurality of electrical power sources and a plurality of electrical loads, interconnected by a main distribution network, one or more switches for forming one or more local group distribution networks, each local distribution network comprising at least one electrical power source and at least one electrical load, the method comprising:
(i) monitoring the main distribution network by comparing the electrical power flow with a set of criteria, the criteria being indicative of an impending disconnection of the local distribution network from the main distribution network, (ii) determining if the electrical power flow on the main distribution network diverges from the set of criteria, (iii) maintaining the switch between at least one of the local group distribution networks and the main distribution network closed, (iv) preemptively configuring the at least one of the local group distribution networks in preparation of the local group distribution network being disconnected from the main distribution network whereby the electrical power from the or each electrical power source within the at least one of the local group distribution networks substantially matches the electrical power requirements of the electrical loads in the at least one of the local group distribution networks if the electrical power flow in the main distribution network diverges from the set of criteria, and (v) shedding electrical loads within the at least one of the local group distribution networks.