基于集结策略预测控制的逆变器控制方法

The Aggregation Based Model Predictive Control Approach for Inverter

逆变器作为当今电源系统设备的重要组成部分,其控制效果对设备稳定运行、电源质量等有重要影响.提出了一种基于集结策略的三相三线电压型逆变器的模型预测控制方法,该方法可以大大降低控制器计算复杂性,实现快速模型预测控制.控制策略中使用d-q旋转坐标系下构建的三相三线制电压型逆变器的累积增量模型,将问题转变为恒值控制系统,并达到消除稳态误差、提升控制精度的目的.仿真结果表明,所述的控制策略可以很好的消除稳态误差,控制器计算复杂度与PID控制相同,并具有良好的动态特性.

Inverters are the important devices for the modern power systems. The control performance of the inverters has influence on the efficiency and quality of the power systems. In this paper, an aggregation based model predictive control method (AMPC) is presented in three-phase three-wire voltage source inverter control. The AMPC can decrease computational complexity significantly, which makes the online computation fast and feasible. The cumulate incremental state space model (CISS-Model) is set on the d-q rotation coordinate, which is able to transfer the control as a constant reference tracking problem, eliminate the steady state error and improve the control accuracy. Simulation results demonstrate that the proposed strategy can eliminate the steady state error and has good dynamic characteristics. The calculation amount is as much as PID control.