混合箝位式三电平整流器控制策略研究  

Research on Control Strategy of the Hybrid Clamp Three-level Rectifier

作　　者：刘稳[1] 邓庆伟[1] 刘毅[1] 曹海洋[1] 

机构地区：[1]中国矿业大学,信电学院,江苏徐州221008

出　　处：《电力电子技术》2013年第10期1-3,共3页Power Electronics

摘　　要：针对高压、大功率混合箝位式三电平脉宽调制(PWM)整流器,分析了其功率开关器件控制规则并建立了数学模型,提出基于参考电压分解的三电平优化空间矢量脉宽调制(SVPWM)算法和电网电压定向直接电流控制策略,实现了混合箝位式三电平整流器的高动态性能控制。通过分析64种电压空间矢量对整流器直流侧中点电位的影响特性,首次提出混合箝位式三电平整流器冗余"七段式"空间矢量组合选择策略,实现了直流侧中点电位的自平衡控制。实验结果表明所提出的控制策略实用、可行。Based on the high voltage and high power considerations, the power switch device control rules of the hy- brid clamp three-level pulse width modulation（PWM） rectifier is analyzed and mathematical model is constructed.Ba- sed on reference voltage decomposition and the grid voltage orientation, an optimized space vector pulse width modu- lation （SVPWM） algorithm and direct current control of the hybrid clamp three-level rectifier are proposed to achieve high dynamic performance control.By analyzing the effect of the sixty-four voltage space vector exerting on the neu- tral-point in DC side of the PWM rectifier,an optimized seven section combination choice strategy of its redundant voltage space vectors is firstly proposed.It can balance the DC voltage automatically.The experimental results prove the efficiency and practicability of the algorithm.

关 键 词：整流器 混合箝位 电压空间矢量 直接电流控制 

分 类 号：TM461[电气工程—电器]