Two Layer Constant Power Control of DFIG Wind Turbines with Super Capacitor Energy Storage

Abstract

To dynamically match the intermittency of wind energy, energy storage devices will be required. In this project a two-layer constant power control scheme for a wind farm equipped with doubly fed induction generator (DFIG) wind turbine is considered. In the two layer control, there is a high layer controller known as Wind farm supervisory control (WFSC), which generates Active power (P), Stator power (Ps), Energy storage power (Pe), DC voltage (Vdc) etc. references for the low layer Wind turbine generator (WTG) controllers, according to the power demand from the grid operator. The low layer wind turbine generator(WTG) controller consist of Rotor side converter control and Grid side converter control to regulate each Double fed induction generator (DFIG) wind turbine, to generate desired amount of active power, Where the deviations between the available wind energy input and desired active power output are compensated by Super capacitor Energy storage system. Simulation is carried out in a MATLAB/SIMULATION to evaluate the performance of wind farm equipped with 15 DFIG wind turbines with and without energy storage system to provide a constant active power of 36MW.