混合钳位式三电平逆变器新型调制策略研究  

Research on a Novel Modulation Strategy of the Hybrid Clamped Three-Level Inverter

作　　者：冯思硕[1] 王金花[1] 杨欢[1] 刘稳[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221000

出　　处：《电工技术学报》2016年第13期46-54,共9页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51307174);中国矿业大学科研专项基金(20124255223)资助

摘　　要：对高压、大功率混合钳位式三电平逆变器的结构、工作原理及相应的电压空间矢量进行了分析。并分析了4种电平状态下电流的流通路径,得到了开关状态切换应当遵循的原则。详细研究了电压空间矢量分别在能量馈出和馈入状态下对钳位电容电压和中点电位的影响特性,得出了相应的钳位电容电压平衡调制策略和空间矢量脉宽调制(SVPWM)策略。仿真和实验证明了所提调制策略的正确性和有效性。The structure, working principle, and the corresponding space voltage vectors of high-voltageand high-power hybrid-clamped three-level inverters are analyzed. The switching principles of the switching statesare obtained through the analysis of the current flow paths of the four level states. The influence characteristics ofthe space voltage vectors on the clamping capacitor voltage and the neutral-point potential under the states ofenergy fed out and fed in are analyzed in detail to obtain the balance modulation strategy of the clamping capacitorvoltage and the space vector pulse width modulation （ SVPWM） strategy. The correctness and effectiveness of theproposed modulation strategies are verified by the simulation and experiment.

关 键 词：混合钳位 中点电位 钳位电容 空间矢量脉宽调制 

分 类 号：TM464[电气工程—电器]