Adaptive protection and control strategy for interfacing wind generators to distribution grids

Distributed generation (DG) from wind power becomes increasingly popular worldwide. However, the connection of large wind DGs onto existing radial distribution feeders cause challenges on proper operations of both DGs and their connected feeders. This paper proposes a new Network-enabled Adaptive Protection and Control (NAPC) strategy for properly interfacing wind DGs into distribution grids. The requirements of NAPC are defined according to IEEE 1547 Std. This paper presents the design of a NAPC system for interfacing three common types of wind DGs (doubly-fed induction generators, permanent-magnet synchronous generators, and squirrel-cage induction generators) to utility feeders, utilizing state-of-the-art digital signal processing and modern networking technologies. This paper also proposes a new two-layer network architecture for real-time monitoring of DG operations and their impacts on utility grids. This architecture is fault tolerant designed for monitoring a distribution system with lots of (over hundred) feeder nodes and multiple DG connections.