Control method for APF hysteresis-band current tracking based on digital over-sampling

被引：0

作者：

Cao, Wu ^{[1
]}

Liu, Kangli ^{[1
]}

Jiang, Nan ^{[1
]}

Zhao, Jianfeng ^{[1
]}

机构：

[1] School of Electrical Engineering, Southeast University

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2014年 / 38卷 / 06期

关键词：

Active power filter (APF); Digital implementation; Digital processor; Hysteresis-band current control; Over-sampling;

D O I：

10.7500/AEPS20130613013

中图分类号：

学科分类号：

摘要：

An implementation method for hysteresis-band current tracking for active power filter (APF) based on digital over-sampling is proposed, which enables precise compensation of harmonic current and stabilizes the switching-frequency. This method can meet different dynamic response demands of control and operation modules by utilizing different extraction factors of digital chip over-sampling. And it fully coordinates two kinds of operations in the digital signal processor (DSP), the sampling interrupt operation and main loop operation, which ensures real-time harmonic current detection and synchronous tracking for the compensating current. The same reference will be tracked N times and the change of power switching device status depends only on the parameters of the preceding switching-period, resulting in high precision tracking for current. Compared with the traditional hysteresis-band current control method, the proposed method has the advantage of not only stabilized switching-frequency but precise harmonic compensation as well, proving its applicability and reliability. A 65 kVA experiment system for three-phase three-wire APF is built for verification and the validity of the proposed method is confirmed by experimental results. © 2014 State Grid Electric Power Research Institute Press.

引用

页码：85 / 90

页数：5

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