双馈风电机组网侧变流器优化PR控制策略

建立双馈风力发电系统网侧变流器的数学模型和基于电压电流双闭环控制策略系统.基于PI控制器的电压定向矢量控制策略虽然可以实现定子有功功率和无功功率的解耦控制,但是易受周围环境和线路参数变化的影响,在谐波抑制方面效果差.提出了优化的PR控制器,在该控制器和矢量控制结合的策略下,可省去电路中的耦合项和前馈补偿项,能够很好地实现定子功率的独立控制并保证系统的控制精度.仿真结果验证了所建立数学模型和控制方式的正确性.

PR Control Strategy for Network-side Converter Optimization of Doubly-fed Wind Turbine Set

The mathematical model for doubly-fed wind turbine network-side converter and the system chart based on voltage and current double closed loop control strategy were established.The voltage-oriented vector control strategy based on PI controller and affected by ambient environment and line parameters has poor harmonic suppression though it can achieve decoupling control of stator active and reactive power.The optimized PR controller was proposed,and with the combination of controller and vector control strategy,having both circuit coupling term and feed-forward compensation term omitted can achieve better independent control of the stator power and assurance system control accuracy.Simulation results verify the correctness of the mathematical model and the control established.