摘要
为了解决较高电压等级直流负荷(如电动汽车)前端整流装置对电网造成的谐波污染问题,笔者根据三电平结构的发展和boost PFC电路的应用,阐述了一种适用于高电压等级、基于三电平拓扑结构的PFC AC-DC变换器的控制策略,分析了其在应用载波移相调制技术下模块化结构,以及其输入、输出电压特点、电感二倍频电流的电气特征,搭建了三电平Boost电路控制及电路模型,得到了较高电压等级PFC变换的方案。仿真结果表明,基于三电平Boost的PFC变换器电流环灵敏度高,能有效实现PFC变换,解决了电感电流波纹过大的问题。
In order to solve the harmonic pollution in grid caused by front- end rectifier high- grade voltage dc load（ electric vehicle for instance）,this paper expounds,based on the development of three- level structure and the application of boost PFC circuit,the control strategy applies to high- grade voltage PFC AC- DC converter with three- level structure,analyzes the modularized structure with the application of CPS and the characteristics of input,output voltage and the electric characteristics of inductance frequency- doubled current,and establishes the control and circuit model of three- level boost circuit,and works out the complete plan for PFC convertion for relatively high- grade voltage. The simulation result shows that the PFC converter based on three- level boost enjoys high- sensitivity current loop,which realizes PFC convertion and solves excess current ripple.
出处
《黑龙江电力》
CAS
2015年第3期264-267,共4页
Heilongjiang Electric Power
