可再生能源并网变流器控制策略的仿真研究

Simulaton on Study Control Strategy of Renewable Energy Grid-connected Inverter

介绍了两电平可再生能源并网变流器主电路的拓扑结构和工作原理,采用SPWM调制方式,设计了外环电压内环电流的双环PI控制器.使用MATLAB/SIMULINK工具搭建了整个系统的仿真模型,仿真结果表明,系统能够实现电流解耦、单位功率因数并网以及能量的双向流动,同时验证了控制策略的正确性.

The topology and work principlehe of the grid-connected inverter are introduced in the paper. The control strategy is identified and the double loop controller which is based on current inner loop and voltage outer loop is designed. Based on theoretical analysis, the system model is set up by Matlab／Simulink software. The system can realize current decoupling and unit power factor control through the result of simulation. Meanwhile, the correctness of control strategy is verified.