Dispersed generation and storage systems for providing ancillary services in distribution systems

In this paper, the problem of the use of dispersed generation (DG) for providing ancillary services in electrical distribution systems is addressed. Fuel cell-based, photovoltaic cell-based, and wind generation systems are connected to the distribution network through power electronic interfaces, each with a proper storage system for the optimal grid operation. Thanks also to the storage system, the DG units are able to provide ancillary services such as load following, back-up, peak shaving, reactive power support and power quality disturbance compensation. A centralized control system coordinates the DG units. Time domain simulations on an actual distribution system are reported and discussed.