华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (11): 76-82.

• 动力与电气工程 • 上一篇    下一篇

低开关损耗有源电力滤波器的滞环电流控制

曾江 叶小军 刘燕 欧阳森   

  1. 华南理工大学 电力学院, 广东 广州 510640
  • 收稿日期:2008-11-07 修回日期:2009-01-13 出版日期:2009-11-25 发布日期:2009-11-25
  • 通信作者: 曾江(1972-),男,讲师,博士,主要从事电能质量研究. E-mail:zengxy@scut.edu.cn.
  • 作者简介:曾江(1972-),男,讲师,博士,主要从事电能质量研究.
  • 基金资助:

    国家自然科学基金资助项目(50707010)


Hysteresis Current Control of Active Power Filter with Low Switching Loss

Zeng Jiang  Ye Xiao-jun  Liu Yan  OuYang Sen   

  1. School of Electric Power, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-11-07 Revised:2009-01-13 Online:2009-11-25 Published:2009-11-25
  • Contact: 曾江(1972-),男,讲师,博士,主要从事电能质量研究. E-mail:zengxy@scut.edu.cn.
  • About author:曾江(1972-),男,讲师,博士,主要从事电能质量研究.
  • Supported by:

    国家自然科学基金资助项目(50707010)

摘要: 提出了一种调节滞环宽度、减少有源电力滤波器(APF)的开关损耗的方法.通过比较有源电力滤波器的各相输出参考电流,来调整各相的滞环宽度,以降低开关损耗较大的相的开关动作次数,同时提高开关损耗较小的相的开关动作频率,从而在保持总的控制精度的同时,降低总的开关损耗.该方法只需加入一个调整电路,即可明显降低有源电力滤波器的开关损耗.用电磁暂态程序进行的计算机仿真结果表明,该方法可在控制精度和开关频率基本相同的情况下,将有源电力滤波器的开关损耗降低10%以上,而且各相开关的温升也更加平稳.

关键词: 有源电力滤波器, 滞环电流控制, 开关损耗, 滞环宽度

Abstract:

Proposed in this paper is a new method to reduce the switching loss of active power filter (APF) through adjusting the hysteresis band width. In this method, the hysteresis band width of each phase of APF is adjusted according to the output reference current, and the switching number of the phase with high switching loss is reduced while that of the phase with low loss is increased. Thus, the total switching loss is decreased without reducing the overall control precision. Only an adjusting circuit may significantly decrease the switching loss. Computer simulation with the electromagnetic transient program shows that, by using the proposed method, the switching loss of APF decreases by more than 10%, the temperature rise of each phase switch becomes smoother, while the control precision and switching frequency are almost unchanged.

Key words: active power filter, hysteresis current control, switching loss, hysteresis band width