中国电力 ›› 2015, Vol. 48 ›› Issue (1): 127-130.DOI: 10.11930.2015.1.127

• 电网 • 上一篇    下一篇

基于电流变化率的准恒频滞环电流控制方法

顾振江1,卢毅2,胡应宏2,刘少宇3   

  1. 1. 国网冀北电力有限公司管理培训中心,北京 102401;
    2. 国网冀北电力有限公司电力科学研究院,北京 100045;
    3. 国网新源张家口风光储示范电站有限公司,河北 张家口 075000
  • 收稿日期:2014-09-29 出版日期:2015-11-25 发布日期:2015-11-24
  • 作者简介:顾振江(1971—),男,河北涿鹿人,高级讲师,从事继电保护、电网运行控制研究及专业培训工作。E-mail: guzhenjiang@163.com

Novel Control Method for Hysteresis-band Current with Quasi-constant Frequency based on Current Change Rate

GU Zhenjiang1, LU Yi2, HU Yinghong2, LIU Shaoyu3   

  1. 1. State Grid Jibei Electric Power Company Limited Management Training Center, Beijing 102401, China;
    2. State Grid Jibei Electric Power Co., Ltd Research Institute, Beijing 100045, China;
    3. Zhangjiakou Electric Power Research Institute, Zhangjiakou 075000, China
  • Received:2014-09-29 Online:2015-11-25 Published:2015-11-24

摘要: 针对滞环电流控制存在的开关频率不固定,设计输出滤波器困难的缺点,通过对开关频率与滞环环宽关系的分析,提出了一种根据电流变化率调节环宽的准恒频滞环电流控制方法。控制方法根据电流变化率来实时调节滞环控制的环宽,实现开关频率的恒定;具有响应速度快和稳定性好的优点,同时克服了滞环电流控制开关频率不固定的缺点;较已有方法计算量小,不依赖于系统参数,容易实现,并通过理论推导和仿真证实了方法的可行性和正确性。

关键词: 非线性控制, 可变环宽, 变流器, 滞环电流控制, 开关频率, 直接电流控制, 准恒频

Abstract: Switching frequency of hysteresis-band current control is inconstant, which leads to the difficulties of filter design and the problem of sampling rate. On the basis of analyzing the relationship between hysteresis-band and switching frequency, a novel hysteresis-band current control method with quasi-constant frequency based on current change rate is proposed to solve this problem. With rapid response and good stability, the proposed method can adjust the hysteresis band according to the current change rate so as to keep the switching frequency constant. As this method doesn’t require the information about the system’s parameters, it is simple and easy to be implemented. Simulation and experimental results have validated the method’s effectiveness.

Key words: non-linear control, variable band-width, converter, hysteresis-band current control, switching frequency, direct current control, quasi-constant frequency

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