作者：陈凯, 张杰
作者单位：电子科技大学自动化工程学院, 四川 成都 611731
关键词：比例积分控制;重复控制;总谐波失真(THD);并网逆变器
摘要：
针对在逆变电源系统中因模型的不精确及系统负载的非线性、以及常规方法中基于完美对消思想设计的重复控制器无法满足逆变电源的控制需求且设计复杂等问题,提出一种新的重复控制器设计方法,利用数字滤波器代替重复控制补偿器,并将内模系数和补偿器等效为同一个低通滤波器.将改进后的重复控制器与PI控制相结合,形成复合式控制系统,进一步提高电流跟踪速度,减小电流谐波含量.并通过运行Matlab仿真模型和具体实验平台测试,验证该方法的可行性和良好性能.
Research on the current control for grid-connected inverter using repetitive control method
CHEN Kai, ZHANG Jie
School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
Abstract: Aiming at the issues of inaccurate mode and nonlinear load in the inverter power supply system, repetitive controller designed based on the thought of perfect compensation in conventional methods cannot meet the control needs of inverted power supply. Moreover, the design is relatively complicated. The author proposed a new repetitive controller design method in this paper. To be specific, a digital filter is first used to replace a repetitive control compensator. Then, the internal model coefficient and the compensator are equivalent to the same low pass filter. The improved repetitive controller is then combined with PI control to form a compound control system, further improving the current tracking velocity and reducing the content of current harmonics. The results show that the method feasibility and performance through operating of Matlab simulation model and a specific experimental platform test.
Keywords: proportional-integral(PI) control;repetitive control;total harmonic distortion(THD);grid-connected inverter
2015, 41(3): 91-95 收稿日期: 2014-8-17;收到修改稿日期: 2014-10-11
基金项目: 中央高校基金科研业务费(ZYGX2012YB029)
作者简介: 陈凯(1984-),男,四川绵阳市人,博士研究生,主要从事测试计量技术及仪器和新能源应用等领域研究.
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