摘要
有源电力滤波器(active power filter,APF)谐波独立控制的本质是实现3方面功能:1)谐波补偿频次可选;2)各选择次谐波补偿程度可独立设定;3)各选择次谐波可无静差补偿。从谐波控制系统结构的角度,分类对比现有APF谐波控制策略,进一步提出改进谐波分次检测结合集中电流环的选择次补偿和全补偿两种运行模式下结构,并以多同步坐标系谐波分次检测结合采用单PI控制器集中电流环为例,定性和定量分析集中电流环静差,给出校准的具体方法。所提方法利用集中电流环频域特性,通过谐波分次检测后再分次校准集中电流环静差,很好地实现了APF谐波独立控制三方面功能,同时控制系统简单,参数易整定、不易出现稳定性问题。最后通过仿真和实验,验证所提方法的可行性和优越性。
The essential for harmonic independent control of active power filters （APF） contains three functions as follows： 1） selective harmonic compensation; 2） setting compensation factor for the selective harmonic; 3） zero steady state error compensation for the selective harmonic. This paper presents an improved control structure consisting of selective harmonic detection and centralized current loop. The structure includes two modes： selective harmonic compensation and all harmonic compensation, which is based on comparison of four traditional schemes in terms of the control structure. In addition, taking the control structure consisting of selective harmonic detection under the multiple rotating reference frame and the single PI current loop for example, this papers gives the method for steady state error correction qualitatively and quantificationally, which employs frequency response characteristics. The proposed method has some advantages, such as the simple control structure, easy parameter adjustments and superior stability, Theoretical analysis is supported by comparative simulation and experimental results.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2014年第3期387-396,共10页
Proceedings of the CSEE
关键词
有源电力滤波器
谐波独立控制
谐波分次检测
集中电流环
静差校准
active power filter （APF）
independentharmonic control
selective harmonic detection
centralizedcurrent loop
steady state error correction
