改进的有源电力滤波器三角波脉宽调制电流控制方法  

Improved triangle-wave pulse-width modulation current control method for active power filter

作　　者：马惠[1] 刘静芳[2] 刘斌帅[3] 

机构地区：[1]中国电子科技集团公司第十四研究所,江苏南京210013 [2]国电南京自动化股份有限公司,江苏南京210003 [3]南瑞继保电气有限公司,江苏南京211100

出　　处：《电力自动化设备》2004年第11期30-33,共4页Electric Power Automation Equipment

摘　　要：在分析有源电力滤波器APF(Active Power Filter)数学模型的基础上,提出了改进的三角波脉宽调制电流控制方法。与传统方法相比,通过在输出指令电压中增加一个与电源电压瞬时值成正比的量,抵消了电源电压对输出指令电压的干扰作用,提高了APF输出电压的准确性,使APF的实际输出电流能够更加精确地跟踪指令电流的变化,从而有效地减小了输出电流误差的脉动范围,这也有利于减小有源电力滤波器的工作损耗和整机容量。仿真结果对比验证了采用改进控制方法的APF比采用传统控制方法的APF的输出电流误差范围小。An improved triangle - wave pulse - width modulation current control method is presented, based on the mathematic model of parallel APF (Active Power Filter). Compared with traditional methods,a value proportional to source voltage is added to the reference voltage,which counteracts the influence of the source voltage, improves the precision of APF output voltage, makes the output current follow the reference current more precisely,and reduce the range of output current error,in favor of reducing the power loss and capacity of APF. The simulative result shows that the range of APF output current error with the improved current control method is smaller than that with the traditional method.

关 键 词：有源电力滤波器 三角波脉宽调制 电流误差 动态仿真 

分 类 号：TM761[电气工程—电力系统及自动化]