五电平级联H桥STATCOM改进模型预测电流控制

Five-level Cascade H-bridge STATCOM Improved Model Predictive Current Control

在此提出一种基于扇区判断的五电平级联H桥静止同步补偿器(STATCOM)改进多目标模型预测电流控制(MPCC)策略,利用无差拍模型获得参考电压矢量并判定其所在的扇区,缩小了滚动优化的开关状态子集,同时在价值函数中引入相间电压均衡辅助函数实现直流侧相间电压均衡控制。所提控制策略不仅能够缩短程序运行时间,而且有良好的电流补偿与相间电压均衡控制性能。最后通过仿真与实验样机验证了改进多目标MPCC策略的有效性。

A five-level cascaded H-bridge static synchronous compensator( STATCOM) based on sector decision is proposed to improve the multi-objective model predictive current control ( MPCC) strategy.The dead-beat model is used to obtain the reference voltage vector and determine the sector in which it is located, which reduces the rolling-optimized switch state subset.At the same tim e,the phase-to-phase voltage equalization auxiliary function is introduced into the value function to realize DC-phase phase-to-phase voltage equalization control. The proposed strategy not only shortens the program running tim e, but also has good current compensation and phase-to-phase voltage equalization control performance.Finally, the effectiveness of the improved multi-objective MPCC strategy is verified by simulation and experimental prototype.