LCL滤波的电压型PWM整流器的有源阻尼控制  

Active Damping Control of Voltage Source PWM Rectififer with LCL Filter

作　　者：张宪平[1] 李亚西[1] 林资旭[1] 许洪华[1] 

机构地区：[1]中国科学院电工研究所

出　　处：《电气传动》2007年第11期22-25,60,共5页Electric Drive

基　　金：国家高技术研究发展计划(863计划)子项目(2003AA512022.2)

摘　　要：为抑制LCL滤波器的谐振,解决采取增加电阻方法带来的PWM整流器功率损耗问题,提出了基于虚拟电阻思想的新型有源阻尼控制策略。滤波电容电压经过比例处理后注入整流器输入电流,通过改变参考输入电流,滤波器的谐振得到了有效抑制。该控制策略不会带来功率损耗及效率降低问题,并且参数的选择非常简单。为了说明阻尼电阻的作用,并对LCL滤波的PWM整流器的数学模型做了分析。最后的仿真结果证明了所提出的控制策略是正确可行的。A novel active damping controlling strategy based on virtual resistor concept was presented to supress resonance of LCL filter and reduce power loss of three-phase pulse width modulation （PWM） rectifier by reactive damping method. Controlling arithmetic was used to replace function of damping resistor. Filter capacitor voltage was measured and multiplied an appropriate proportional parameter to inject input current of PWM rectifier, Reference current of PWM rectifier was modified to suppress resonance of filter, This strategy wouldn＇t cause power loss to reduce efficiency of system. It is also very easy to choose parameter. Moreover complete mathematical model of three-phase PWM rectifier were analyzed to show function of damping resistor. At last the results of simulation using Matlab show the validity of the proposed method.

关 键 词：PWM整流器 LCL滤波器 谐振 有源阻尼 虚拟电阻 

分 类 号：TM461[电气工程—电器]