Output Power Coordination Control for Wind Farm in Small Power System

Nowadays, wind turbine generator (WTG) is increasingly required to provide control capabilities regarding output power. Under this scenario, this paper proposes an output power control of wind farm (WF) using pitch angle control connected to small power systems. In this control approach, WF output power control is achieved by two control levels: central and local. In central control, WF output power command is determined by fuzzy reasoning which has three inputs for average wind speed, variance of wind speed, and absolute average of frequency deviation. Then, local output power commands of each WTG are given by WF output power command and coordination control, and each WTG ensures WF output power command. The simulation results by using an actual detailed model for wind power system show the effectiveness of the proposed method.