【摘要】 针对不平衡电网中负序分量对双馈式风力发电机组输出电压产生二倍频扰动的影响,该文提出了比例积分谐振控制和变结构滑模变结构控制策略相结合的网侧变流器控制策略。将比例积分谐振控制器作为主控制器,抑制电网电流中的负序分量。滑模变结构作为辅助控制器,通过对实时功率控制,实现输出功率稳定输出。并在Matlab/Simulink平台进行仿真验证,结果表明可有效抑制负序分量对风力发电机组的影响。更多还原

【Abstract】 The influence of the negative sequence component in the unbalanced power grid on the double-frequency disturbance of the output voltage of the doubly-fed wind turbine is presented. The proportional integral resonant controller is used as the main controller to suppress the negative sequence component in the grid current. The sliding mode variable structure is used as an auxiliary controller to realize direct power control through real-time power calculation. The 2 MW wind power grid side converter model is built on the Matlab/Simulink environment,and the correctness of the control strategy is verified by simulation.更多还原