改进谐波分次检测结合集中电流环的APF谐波独立控制实现

发布时间：2018-04-02 03:18

本文选题：有源电力滤波器　切入点：谐波独立控制　出处：《中国电机工程学报》2014年03期

【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。
[Abstract]:The essence of harmonic independent control of active power filter is to realize three aspects of function: 1) harmonic compensation frequency can be selected 2) each selected harmonic compensation degree can be independently set 3) each selected harmonic can be compensated without static error. The angle of system structure, Compared with the existing APF harmonic control strategy, the improved harmonic detection combined with the selective compensation and full compensation of the current loop is further proposed. Taking harmonic detection in multi-synchronous coordinate system combined with single Pi controller concentrated current loop as an example, qualitative and quantitative analysis of static error of centralized current loop is given, and the specific method of calibration is given. The proposed method utilizes the frequency domain characteristic of centralized current loop. After harmonic detection, the static error of concentrated current loop is calibrated, and the three functions of APF harmonic independent control are well realized. At the same time, the control system is simple, the parameters are easy to be adjusted, and the stability problem is not easy to occur. Verify the feasibility and superiority of the proposed method.
【作者单位】：东南大学电气工程学院;
【分类号】：TM464

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