基于FPGA的模块化多电平变换器控制策略研究  

Control Strategy for Modular Multilevel Converter Based on FPGA

作　　者：李小强[1] 戴鹏[1] 朱荣伍[1] 伍小杰[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,江苏徐州221008

出　　处：《电气传动》2012年第11期65-70,共6页Electric Drive

基　　金：江苏省"青蓝工程";徐州市科技项目(XJ11B008)

摘　　要：模块化多电平变换器(MMC)是一种新型的拓扑结构,其主要应用在中高压领域。在分析MMC拓扑结构及其工作原理的基础上,以5电平为例,采用基于参考电压分解的电压空间矢量(SVPWM)调制策略,合理选择冗余开关状态,降低了1/3的开关频率。通过动态选择投入桥臂的子模块,实现了直流侧电容电压的平衡控制。并针对FPGA难以实现三角函数运算的特点,提出了一种新的方法进行扇区选择。最后分别在Matlab/Simulink和Xilinx XC3S400型号FPGA中进行了仿真和实验验证,理论分析与实验结果均说明了该控制策略的优越性。Modular multilevel converter （MMC） which is mainly used in high voltage field is a new topolog- ical structure. The topological structure of MMC and its principle was introduced. Taking five levels converter as an example, the space vector PWM（SVPWM） was used based on reference voltage decomposition for modu- lation. By choosing redundancy vector, the switching frequency drops by a third. Through dynamic selection of the bridge arm＇s subsystem, the balance control of DC capacitor voltage is achieved. Aiming at the problem that FPGA is difficult to realize trigonometric calculation,a new method of sector selection was put forward. Finally, simulation and experiments were respectively conducted in Matlab/Simulink and Xilinx FPGA XC3S400 model, and both theoretical analysis and experimental results show the superiority of this control strategy.

关 键 词：模块化多电平变换器 参考电压分解SVPWM 电容电压平衡 5电平 现场可编程门阵列 

分 类 号：TM46[电气工程—电器]