中文摘要：

提出一种适用于二极管箝位多电平变换器的均压多电平SVPWM快速算法,该算法在α’β＇坐标系下将多电平SVPWM算法中的参考矢量变换、顶点坐标计算、矢量判区和作用时间计算等分解为快速简单的计算,继而通过遍历所有冗余开关矢量,预测下一开关周期内冗余开关矢量对直流电容电压的影响,选择输出可使直流电容电压回归均衡值能力最强的最优开关矢量.仿真结果比较了传统PWM算法和所提均压多电平SVPWM算法,验证了所提算法的有效性.最后设计了基于可编程逻辑器件的SVPWM算法的控制核心,通过小容量实验系统研究验证了所提算法良好的动静态性能.

英文摘要：

A fast SVPWM（Space Vector Pulse Width Modulation） algorithm with DC voltage equalization is proposed for multilevel diode-clamped converter,which decomposes the reference vector transformation,vertex calculation,vector location determination and dwelling time calculation into simple and fast calculations in α＇β＇ coordinates,forecasts the influence of all redundant switching vectors on the DC-link capacitor voltages for the next switching period,and selects the optimal switching vector to realize DC-tink capacitor voltage equalization.The simulative results are compared between the traditional PWM algorithm and the proposed SVPWM algorithm,which validates the effectiveness of the proposed algorithm.Its control core is designed based on FPGA（Field Programmable Gate Array） and its excellent static and dynamic performances are validated by the experimental results of a small-scale test system.