基于简化SVPWM调制的T型变换器解耦控制

Decoupling control of T-type converter based on simplified SVPWM modulation

针对传统三电平矢量调制策略区间划分繁琐、计算复杂等缺陷,分析给出了简化三电平SVPWM调制策略的数字化实现方法,并进一步提出了调制策略矢量时间的计算方法与扇区判断方案。为验证调制策略的可靠性,基于T型三电平变换器进行了必要的仿真与实验验证,结果表明,文中简化三电平SVPWM调制策略可靠性高,网侧电流输出波形质量良好,动静态性能优良。

In view of the traditional three-level space vector modulation（ SVM） requires a large calculation of partitioning and voltage vector,a simplified three-level vector modulation strategy is presented. The calculation method and judgment principle of vector judgment of the modulation strategy vector time are proposed. To test and verify the correctness of the validity of the simplified SVPWM modulation method,a necessary simulation and experimental verification are carried out based on T-type tri-level converter,the result shows that the proposed methods effectively simplifies the vector operation,the quality of grid current and dynamic static performance is good.