Active Power Control of Wind Turbine Considering Variation Range of Electrical Power of Non-Pitch Regulation

Abstract

With the large-scale wind power connected to the power grid, wind turbine generators (WTG) are expected to provide active power control (APC) to respond to the dispatching commands. Faced with the fluctuation of power command, the existing APC strategies mainly activate the pitch angle regulation at the rotor speed boundary, whose purpose is only to limit the rotor speed within the speed range. However, the pitch angle setting is random and significantly affects the utilization of the rotor speed regulation to deal with the power fluctuations. Thus, the improved APC strategy is proposed considering the variation range of electrical power of non-pitch regulation. By actively setting the pitch angle corresponding to the power command range, the improved strategy overcomes the randomness of the pitch angle setting, and reduces the frequency of the rotor speed reaching the boundaries, and finally improves the APC performance.