摘要
为了提高双馈电机功率解耦控制的动态性能,提出了一种高阶滑模控制策略.首先分析了双馈异步电机数学模型以及基于电压定向矢量控制原理,然后针对传统控制方法在实现功率解耦存在动态性能不佳现象以及风机模型的非线性,构造一种基于幂次函数趋近律的高阶滑模控制器,最终实现了变速恒频双馈风力发电机有功、无功功率动态解耦控制.仿真结果表明,所提出的控制策略的精度、鲁棒性、动静态性能均优于传统PI控制器.
In order to improve the dynamic performance of decoupling control in the doubly-fed induction generator(DFIG),a high-order sliding mode control strategy was proposed.In the study the mathematical model and the principle of stator voltage orientation vector control was firstly analyzed.Secondly,aiming at the poor dynamic performance of traditional control scheme and the nonlinearity of wind turbine,a high-order sliding mode control strategy based on power function was proposed.The dynamic decoupling of active power and reactive power of variable-speed constant-frequency DFIG was realized.The simulation results show that the strategy has high control precision,strong robustness and excellent dynamic and static performance compared with the traditional PI controller.
引文
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