基于三维调制的级联H桥整流器控制策略  

Research on the Control Strategy of Cascaded H-bridge Rectifier Based on Three-dimensional Modulation

作　　者：余发山[1] 毛克春 朱艺锋[1] YU Fa-shan;MAO Ke-chun;ZHU Yi-feng(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学电气工程与自动化学院

出　　处：《控制工程》2018年第9期1628-1633,共6页Control Engineering of China

基　　金：国家自然科学基金(U1504518);河南省高等学校控制工程重点学科开放实验室资助项目(KG2014-15);河南省教育厅科技研究重点项目(14A470005);河南理工大学博士基金(72103/001/021)

摘　　要：在无工频变压器式级联式功率变换器中,级联H桥整流器直流侧电容电压平衡是变换器控制的关键问题。本文提出一种基于三维调制的级联H桥整流器直流侧电容电压平衡控制策略,通过各桥在单位时间内吸收的有功能量调节,实现直流侧电容电压平衡控制。引入有功电流和无功电流双闭环的方法对输入电流进行解耦,实现系统的单位功率因数运行。仿真实验表明,该控制策略有效地提高了直流侧电容电压平衡的控制效果。For the cascaded power converters which belong to non-frequency transformer, the key issue of the converter control is the balance of the capacitor voltage in the cascade H-bridge rectifier（CHBR） DC-link. This thesis puts forward a balance control strategy of the capacitor voltage in the CHBR DC-link based on three-dimensional modulation, which realizes the balance control of DC-link capacitor voltage by adjusting the amount of the active power absorbed by each bridge in the unit period. Bringing in the method of double closed-loop of active current and reactive current to decouple for the input current, which realizes the control of its unit power factor. The result of simulation shows that this control strategy has improved the control effect of DC-link capacitor voltage balance effectively.

关 键 词：级联H桥整流 电压平衡 有功能量调节 三维调制 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]