The design of compound pitch controller for wind turbines

Abstract

As an important renewable energy source, wind energy has been highly valued by countries. In recent years, the mainstream of wind turbines in the world is the pitch control units. Based on the joint simulation of 1.5 MW doubly-fed wind turbine, a feed-forward and an adaptive PI pitch controller are combined, they are both designed by fuzzy theory. Through the simulation, it can be seen that the power of the unit can be controlled constant when the wind speed is higher than the rated value. The fuzzy compound pitch controller proposed in this paper can timely compensate the power fluctuation caused by the wind speed disturbance, it has better control effect than traditional PI and fuzzy PI controller with shorter adjustment time and less power overshoot.