用于并联型有源电力滤波器的谐振调节器选择性特性比较分析  

Comparison Analysis on Selectivity of Resonant Controllers for Parallel Active Power Filters

作　　者：易皓[1] 卓放[1] 詹文达[1] 翟浩[1] 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049

出　　处：《中国电机工程学报》2014年第30期5320-5328,共9页Proceedings of the CSEE

摘　　要：为减小运算量,并联型有源电力滤波器的电流指令可以通过负载电流减去其中的基波成分获得。但该方法生成的指令包含各次谐波成分,为混合谐波指令。此时,为实现选择谐波补偿功能,电流环调节器需具有良好的选择性特性。该文以选择性特性为重要指标,详细比较分析比例谐振调节器和矢量谐振调节器的调节特性。文章从原理推导、电流调节性能、以及对系统稳定性的影响3个方面对两种谐振调节器进行对比研究。通过研究发现,比例谐振调节器未考虑被控对象影响,选择性特性较差,适用于电流指令已精确生成的场合;而矢量谐振调节器充分考虑了被控对象影响,具有良好的选择性特性,适合上述拥有混合谐波指令、又要求实现选择谐波补偿功能的场合。最后,通过一台10 kVA实验样机对上述结论进行详细验证。To reduce the computation burden, the current reference of the parallel active power filter could be obtained by subtracting the fundamental component from distorted load currents. However, this kind of mixed reference contains kinds of harmonic components. In this condition, the demand of selectivity should be fulfilled by the current controller, if the function of selective harmonic compensation is still required. In this paper, with regarding that the selectivity is a significant property, the proportional resonant controller and the vector resonant controller were compared. The comparison analysis includes their derivation, performances in the current control loop, and the influence to the system stability. Through the analysis, the features of each resonant controller were concluded： the proportional resonant controller shows poorer selectivity than vector resonant controller, and it should be used in conditions whose reference is accurately generated, while vector resonant controller has good selectivity and is more suitable for the aforementioned selective active power filter with mixed reference. Finally, all conclusions in this paper were validated through a 10 kVA laboratory prototype.

关 键 词：有源电力滤波器 谐振调节器 选择性特性 稳定性 

分 类 号：TM53[电气工程—电器]