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邹叶,陈嵘,沈正斌,李鹏,郭有贵.基于分数阶重复PI控制的并网逆变器设计[J].电源学报,2018,16(2):144-150
基于分数阶重复PI控制的并网逆变器设计
Design of Grid-connected Inverter Based on Fractional-order Repetitive PI Control
投稿时间:2016-01-05  修订日期:2016-03-28
DOI:10.13234/j.issn.2095-2805.2018.2.144
中文关键词:  并网逆变器  分数阶相位超前  虚拟电阻  重复PI控制
英文关键词:grid-connected inverter  fractional-order phase lead  virtual resistance  repetitive PI control
基金项目:国家自然科学基金资助面上项目(61174037,51277156);湖南省自然科学基金资助项目(2015JJ6105);湖南省教育厅优秀青年资助项目(14B167)。
作者单位E-mail
邹叶 湘潭大学控制工程研究所, 湘潭 411105 769525652@qq.com 
陈嵘 湘潭大学控制工程研究所, 湘潭 411105  
沈正斌 湘潭大学控制工程研究所, 湘潭 411105  
李鹏 湘潭大学控制工程研究所, 湘潭 411105  
郭有贵 湘潭大学控制工程研究所, 湘潭 411105  
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中文摘要:
      针对三相LCL型并网逆变器并网电流中存在周期性谐波以及滤波电路产生谐振尖峰的问题,提出一种基于分数阶相位超前法的重复PI复合控制方案。采用分数阶相位超前设计,克服整数阶相位超前法相位校正精确度不高的问题,保证系统的稳态输出特性;将LCL滤波器中电容并联的电阻进行等效,替代重复控制补偿器中的低通滤波器,简化重复控制器的参数设计;在重复控制器中叠加PI控制,克服了重复控制器动态响应差的问题。通过仿真分析和实验验证,结果表明该方法提高了系统的稳态性能和动态响应速度。
英文摘要:
      Considering the problems of periodic harmonic in grid current and resonance peak in the filter circuit, which both exist in the LCL-type three-phase grid-connected inverter, a repetitive PI compound control scheme based on fractional-order phase lead method is proposed. The design of fractional-order phase lead is adopted, which overcomes the low accuracy of phase correction in the integer-order phase lead method and ensures the system's steady-state output characteristics. The equivalence of the resistor, which is paralleled with the capacitance of LCL filter capacitors, replaces the low-pass filter of compensator with repetitive control, simplifying the parametric design of the repetitive controller. Moreover, the repetitive controller is combined with PI control to improve its poor dynamic response. Through simulation analysis and experimental verification, it was shown that this method improved the system's steady-state performance and dynamic response speed.
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