基于三扇区电压矢量几何优化的模型预测控制

Model Predictive Control Based on Geometric Optimization of Three Sector Voltage Vector

传统的低复杂度模型预测控制(MPC),通过复杂的微分方程从向量集中选取最优矢量。为降低计算负担,这里提出了一种基于三扇区适用于直接功率控制(DPC)的矢量预测方案T-DPC。借助平行四边形的几何特性,通过迭代过程,在变换器的电压空间中形成了一组规律分布的矢量。通过简单的代数方程即可检测最佳扇区及最优电压矢量的构成。该方法在保证功率跟踪良好的基础上,具有更简洁的计算过程及快速精确的运算。此外,实验结果验证了该方法的可行性。

Conventional low-complexity model predictive control(MPC)uses complex differential equations to select the optimal vector from the vector set.A vector optimization scheme T-DPC suitable for direct power control(DPC)is proposed to reduce the computational burden.By virtue of the geometric characteristics of parallelogram,a group of regular distribution vectors are formed in the voltage space of the converter through the iterative process.The optimal sector and voltage vector are detected by simple algebraic equation.This method has more concise calculation process and fast and accurate calculation on the basis of ensuring the good performance of power tracking.In addition,the experimental results verify the feasibility of this method.