摘要
基于对峰值电流型Boost功率因数校正(PFC)变换器的离散建模,得到变换器电感电流的频闪映射图,并利用相轨迹更好地揭示了输入电压和电感电流稳定性的关系。为了避免分岔,使变换器稳定工作在单周期态,分别采用参数微扰法和双积分滑模法进行分岔控制。仿真结果表明,与参数微扰法相比,双积分滑模法不需要施加外部扰动,具有更好的鲁棒性,能有效地避免因输入电压变化所产生的分岔现象,还弥补了参数微扰法在快时标分岔控制效果中的不足,并获得更高的功率因数值。
A discrete model of Boost PFC converter is built,the stroboscopic map of its inductor current is obtained and its phase-plane trajectory is applied to reveal the relationship between input voltage and inductor current stability. The small parametric perturbation method and the double integral sliding mode method are respectively adopted to avoid bifurcations. Simulative results show that,the later,with better robustness and higher power factor,does not need to exert external disturbance,effectively avoids the bifurcations caused by input voltage variation and has better fast-scale bifurcation control effect.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第10期68-73,共6页
Electric Power Automation Equipment
基金
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711205)~~
关键词
变换器
功率因数校正
快时标
分岔
参数微扰
双积分滑模
electric converters
power factor correction
fast-scale
bifurcation
small parametricperturbation
double integral sliding mode
