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.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第11期30-33,共4页
Electric Power Automation Equipment
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
active power filter
triangle - wave pulse-width modulation
current error
dynamic simulation
