基于时基的恒频自适应电流控制技术  

An Adaptive Current Control Technique with Constant Frequency Based on Clocked Signal

作　　者：刘文业[1] 罗隆福[1] 张志文[1] 许加柱[1] 黄肇[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《电力系统自动化》2014年第1期109-114,120,共7页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(51077044);2012年湖南省研究生科研创新项目(CX2012B127)~~

摘　　要：针对电流发生器在电流跟踪过程中开关状态切换的行为特性,采用数学解析建模的方式,构建了恒频自适应控制算法。该算法利用相邻周期内两次开关切换点处的电流跟踪误差,根据误差均摊的原则,预定下个控制周期开关切换时刻,产生开关频率恒定的自适应脉宽调制信号,实现对指令电流的快速精确跟踪。通过建立仿真模型,研究了该算法在各种暂态条件下的动态响应性能,作为有效性验证手段,最后给出了新算法应用于单相电流发生器的仿真和实验研究结果。According to the behavior characteristics of switching of the current generator during command current tracking,a constant frequency adaptive current control algorithm is developed using mathematical modeling.By recording the current tracking errors at the switch points in two adjacent cycles and on the principle of error sharing,the switch time of the next control cycle will be scheduled,and the adaptive pulse width modulation（PWM）signals of constant switch frequency generated,realizing rapid and accurate tracking of the command current.In order to examine the methods dynamic response performance under different transient conditions,a simulation model and prototype are built,the simulation and experimental results show the validity of the proposed algorithm in current tracking and control.

关 键 词：电流控制 脉宽调制 恒频调制 电压源型变换器 

分 类 号：TM46[电气工程—电器]