中国电机工程学报Issue(27)：4621-4628,8.DOI:10.13334/j.0258-8013.pcsee.2014.27.009
一种级联H桥型静止无功发生器电容电压平衡控制策略
A Direct Current Capacitor Voltage Balancing Control Strategy for H-bridge Cascaded Static Var Generator
摘要
Abstract
To the issue of H-bridge cascaded static var generator (SVG) direct current (DC) capacitor voltage balancing, this paper analyzed the relation between modulation wave magnitude and DC capacitor voltage variation based on phase shifted carrier pulse width modulation (PSCPWM), and proposed the Modulation Wave Supplementary method. On the basis of maintaining the total modulation wave constant and keeping the H-bridge modulation degree less than 1, the appropriate supplementary was introduced to modulation waves of each cascaded H-bridge respectively according to the error between the voltage of each bridge and the mean voltage of the DC capacitors at same phase. The simulation and experimental results prove that the Modulation Wave Supplementary method has the ability to control the balance of DC capacitor voltage and does not have obvious influence on output current of the SVG system. Moreover, the proposed method has less control parameters, and can be realized easily without any complex sorting operations, and has good practical application value.关键词
级联 H 桥/静止无功发生器/电容电压平衡/载波移相脉宽调制/调制波Key words
H-bridge cascaded/static var generator (SVG)/capacitor voltage balancing/phase shifted carrier pulse width modulation (PSCPWM)/modulation wave分类
信息技术与安全科学引用本文复制引用
张勇军,姚智聪,王京,李华德..一种级联H桥型静止无功发生器电容电压平衡控制策略[J].中国电机工程学报,2014,(27):4621-4628,8.基金项目
“十二五”国家科技支撑计划重大项目(2012BAF 09B02)。Key Project of the National Twelve-Five Year Research Program of China (2012BAF09B02) （2012BAF 09B02）
