Coordination Strategy of Large-Scale DFIG-Based Wind Farm for Voltage Support With High Converter Capacity Utilization

Due to the long-distance transmission, external grid cannot effectively support access point voltage (APV) of large-scale wind farm (WF), which thus entails DFIG-based WF provide its ancillary services on reactive power generation. Considering factors limited down-sized converter capacity, various operating modes turbines (WTs), and large pressure communication central governor, this paper proposes a distributed active coordination scheme for APV support. A self-allocation is developed operated in each WT dispatch. Based mechanism consensus control aligning with principle preferential proportional utilization spare capacity (RPC), proposed method collaborates rotor side converters all WTs but without necessity knowing total RPC. Further, case that RPC insufficient demand, coordinating factor extension generated weaken power. Through current-enforced PQ loop, it guarantees high as well an exact compensation imbalance, thereby reduces curtailment release. Several studies verify effectiveness method.