电力系统自动化2016，Vol.40Issue(15)：113-119,7.DOI:10.7500/AEPS20150613003
级联H桥变流器电容电压均衡约束条件
Constraints for Balancing Capacitor Voltage of Cascaded H-bridge Converters
摘要
Abstract
This paper establishes a mathematical model of cascaded H‐bridge converters and analyzes the factors which cause capacitor voltage unbalance . Further , the differential equation and transfer function are presented to describe the modulated wave adjustment balancing method . The analytical solution of the capacitor voltage steady value is obtained under balanced voltage control condition . In order to set appropriate controller parameters of many sub‐modules , phase and proportion coefficient constraints are studied and calculated . Likewise , when the converter switches between the inductive work mode and capacitive work mode , DC capacitor balanced voltage control must conform to the constraints . A model for a three ‐phase converter is developed via PSCAD/EM TDC . Simulation results have verified that the phase and proportion coefficient constraints are effective .关键词
级联H桥变流器/直流电压均衡/约束条件/多电平变流器Key words
cascaded H-bridge converter/DC voltage balance/constraints/multilevel converter引用本文复制引用
刘秋降,吴命利,吴丽然..级联H桥变流器电容电压均衡约束条件[J].电力系统自动化,2016,40(15):113-119,7.基金项目
中国铁路总公司科技研究开发计划重点课题资助项目（2015J008-F）。This work is supported by the Science and Technology Development Plan of China Railway Corporation （ No ．2015J008-F）． （）
