新型双馈风力发电机有功功率平滑控制策略研究

摘要

In order to solve fluctuation problem of outputting active power of wind turbine generator in certain range caused by uncertainty of wind energy, a large inertia of wind turbine generator and response delay of wind turbine generating system, the paper proposed a novel active power smoothing control strategy for double-fed wind turbine generator. The control strategy adopts coordinated control strategy of variable propeller and variable speed in total wind speed range and on the basis adds a control link of active power error, which takes auxiliary controll dictates of rotor voltage as feedback variable to join into primary controlling dictates of rotor voltage to control SPWM pulse generator, so as to realize smoothing control of outputting active power of stator of wind turbine generator. Matlab/Simulink simulation results indicated that the control strategy effectively suppress fluctuations of outputting active power of double-fed wind turbine generator compared with traditional control strategies.%针对由于风能的不确定性、风力发电机的大惯性以及风力发电系统的响应延迟性等造成的风力发电机输出有功功率在一定范围内有波动的问题,提出了一种新型双馈风力发电机有功功率平滑控制策略.该控制策略在全风速范围内采用变浆与变速协调控制策略,并在其基础上增加了一个有功功率误差控制环节,将转子电压辅助控制指令值作为反馈量加入原来的转子电压控制指令值,通过控制SPWM脉冲发生器来实现风力发电机定子输出有功功率的平滑控制.Matlab/Simulink仿真结果表明,与传统有功功率控制策略相比,该新型有功功率平滑控制策略有效抑制了双馈风力发电机输出有功功率的波动.