谷值V^2控制Boost变换器原理及稳定性分析  

Principle and stability analysis of valley V^2 controlled Boost converter

作　　者：何圣仲[1] 许建平[1] 周国华[1] 吴松荣[1] 张希[1] 

机构地区：[1]西南交通大学电气工程学院磁浮技术与磁浮列车教育部重点实验室,四川成都610031

出　　处：《电力自动化设备》2014年第7期21-27,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51177140;61371033);高等学校博士学科点专项科研基金资助项目(201301-84120011);四川省青年科技基金资助项目(2013JQ0033);中央高校基本科研业务费专项资金资助项目(SWJTU11BR33;2682013ZT20)~~

摘　　要：分析了Boost变换器的输出电压纹波,将谷值V2控制技术应用于Boost变换器。详细分析了谷值V2控制Boost变换器的工作原理,讨论了系统的稳定性,研究了斜坡补偿对其稳定性的影响。搭建了基于PSIM软件的仿真模型和实验平台,仿真及实验结果表明:工作于连续导电模式的谷值V2控制Boost变换器稳定工作范围为占空比大于0.5;在占空比小于0.5时会发生次谐波振荡,该次谐波振荡可以通过加入适当的斜坡补偿有效地消除。The output voltage ripple of Boost converter is analyzed and the valley V2 control technique is applied to it. The operational principle of valley V2 controlled Boost converter is analyzed and its system stability is investigated. The influence of slope compensation on its system stability is studied. A simulation model and an experimental platform are constructed based on PSIM software and the simulative and experimental results indicate that,the valley V2 controlled Boost converter operates stably in the continuous conduction mode when its duty ratio is bigger than 0.5,otherwise,subharmonic oscillation may occur,which can be effectively eliminated by proper slope compensation.

关 键 词：BOOST变换器 谷值V^2控制 次谐波振荡 斜坡补偿 稳定性 

分 类 号：TM46[电气工程—电器]