一种NPC型三电平变流器虚拟空间矢量调制策略的快速算法研究  

Research on Fast Algorithm of Virtual Space Vector Modulation Strategy Used in NPC Three-Level Converter

作　　者：李宁[1] 王跃[1] 蒋应伟[1] 王兆安[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电源学报》2013年第6期1-8,共8页Journal of Power Supply

基　　金：国家科技支撑项目(2007BAA12B04)

摘　　要：在NPC型三电平变流器的调制策略中,虚拟空间矢量调制策略(Virtual Space Vector PWM,VSVPWM)是一种全调制度系数和全功率因数中点电压无波动的调制策略,但该调制策略的具体实现过程较为繁琐。分析了VSVPWM策略的基本原理,在此基础上提出了一种三电平VSVPWM策略的快速等效算法-各相电平作用时间计算法,这种快速算法不需进行传统三电平VSVPWM的复杂运算,更易于数字化实现。仿真和实验验证了文中理论分析的正确性。In the modulation strategies of three-level NPC converter, virtual space vector pulse width modulation （VSVPWM） strategy can achieve neutral point voltage control under the entire modulation index and full power factor. The basic principle of VSVPWM was analyzed and a equivalent fast algorithm of three-level VSVPWM was presented, which is called each phase switch time calculation method. This fast algorithm does not require complex calculations of the traditional three-level VSV-PWM and it is more easily implemented with a microprocessor. Simulation and experiment results verify the correctness of the analysis.

关 键 词：三电平NPC变流器 虚拟空间矢量调制 中点电压波动 快速等效算法 各相电平作用时间计算法 

分 类 号：TM46[电气工程—电器]