中文摘要：

实际运行中电机参数的变化及电网电压波动等外部扰动的出现,会严重影响系统并网性能。为了实现双馈风力发电机平滑接入电网,将滑模变结构控制与矢量控制相结合,提出了一种负载并网控制策略。仿真和实验结果表明：在负载并网滑模控制下,双馈风力发电机并网时冲击电流较小,控制策略是可行的;与传统PI控制相比,本控制策略稳态误差近似为零,能有效抑制电机参数扰动及外部扰动对双馈风力发电系统的影响,具有较强的鲁棒性。

英文摘要：

Actual operation of motor parameters change and external disturbances such as voltage fluctuations appear,will seriously affect the system performance of grid connection. In order to realize the doubly fed wind power generator smooth cutting-in grid,a load cutting-in control strategy was presented with combination of sliding mode control and vector control technique. The simulation and experimental results show that impact current of doubly fed wind power generation system is little under the load and sliding mode control,the control strategy is feasible; Compared with the traditional PI control,the control strategy of steady state error is approximately zero,which can provide stronger robustness against motor parameters uncertainty and external disturbances.