单周双极性控制三相功率因数校正技术  

Three-phase power factor correction based on one cycle bipolar control

作　　者：郑连清[1] 何立新[1] 李鹍[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电力自动化设备》2009年第6期6-9,共4页Electric Power Automation Equipment

基　　金：重庆市科委自然科学基金计划资助项目(2006BB2218)~~

摘　　要：通过对单周双极性控制三相功率因数校正技术的工作原理、控制方法进行仿真研究,在单周双极性控制下输入电流能较好地跟踪输入电压,验证了采用该控制策略,功率因数校正系统具有动态响应快、易于平稳等优点。分析了单周双极性控制下,在每个开关周期、不同开关时段、不同开关组合情况的电感电压和电感电流的关系,经过对saber模型仿真结果的分析,推导出电感电流纹波的数学表达式,得出了电流纹波与电感值、开关频率和积分时间系数相关的结论。同时,系统参数一定时,当输出电压大于2倍的相电压与积分时间系数的比值,可以减小电感电流纹波;输入、输出电压一定时,电感电流纹波与电感值和开关频率成反比;系统稳定性范围与负载大小及积分时间系数有关。The three-phase PFC（Power Factor Correction） based on one cycle bipolar control technology is simulated and studied in its working principle and control method. The input current follows input voltage well,which proves that the PFC system with one cycle bipolar control has fast dynamic response and intends to be stable. The relations between inductor voltage and currentunder different switch periods,different switching times and different switch combinations are analyzed. Based on the analysis of the saber model simulative results,the mathematic expression of inductor current ripple is derived and the conclusion is got that the current ripple relates to inductor value,switching frequency and integral time coefficient. When the system parameters are fixed,the inductor current ripple can be reduced if the output voltage is greater than two times the ratio of phase voltage to integral time coefficient;when the input and output voltages are constant,the inductor current ripple is inversely proportional to the inductor value and switching frequency;the range of system stability relates to the load and integration time coefficient.

关 键 词：功率因数校正 单周控制 双极性控制 电感电流纹波 积分时间系数 

分 类 号：TN713[电子电信—电路与系统]