An Optimization Approach for Smoothing Output Power of Variable Speed Wind Turbines

With the increasing penetration level of wind power, issues caused by this intermittent energy arouses extensive attention these years. How to mitigate the fluctuation of wind turbine output power is one of them. Variable speed operation of wind turbines, on the one hand, introduces electronic converters which can decouple the wind generator system with power system response and further bring many stability problems. On the other hand, wide rotor operation range makes it possible to flexibly adjust the rotor speed to meet with control objective. This paper introduced a detailed control method to smooth the power output of variable speed wind turbine with the strategy to optimize rotor speed. It was proved to be effective by the case study.