基于单相逆变器的比例谐振控制设计  

Proportional resonant control design based on single phase inverter

作　　者：李坤[1] 郑文帅 马超[1] 刘春喜[1] Li Kun;Zheng Wenshuai;Ma Chao;Liu Chunxi(Liaoning Technical University,Huludao,Liaoning 125105)

机构地区：[1]辽宁工程技术大学

出　　处：《电气技术》2019年第12期23-27,45,共6页Electrical Engineering

基　　金：辽宁省教育厅重点实验室基础研究项目（LZ2015045）

摘　　要：在单相并网逆变器的应用中,电流控制器的参数对系统输出电流的质量起着至关重要的作用。在负载电流突变时对逆变器输出电流进行有效控制是检验其并网能力的有效方法。本文提出了一种使系统达到最佳性能的比例谐振控制器参数设计方法。通过对系统建模分析推导出系统传递函数,利用系统开环幅频特性来确定比例谐振控制器参数以获得更好的动态性能,在系统带宽内达到理想的系统增益,充分发挥了比例谐振控制器在静止坐标系下对基频电流无静差跟踪的优势。最终通过仿真和实验验证了该分析方法的有效性。In the application of single-phase grid-connected inverter, the parameters of current controller play an important role in the quality of system output current. It is an effective method to control the output current of inverter when load current is abrupt. In this paper, a parameter design method of proportional resonant(PR) controller is proposed to achieve the best performance of the system. By modeling and analyzing the system, the transfer function of the system is derived, and the parameters of the PR controller are determined by using the open-loop amplitudes and frequencies of the system. Through analyzing system modeling system transfer function is deduced, using the amplitude frequency characteristics to determine the PR system open loop controller pa rameters to obtain better dynamic performance, gain within the system bandwidth to achieve the ideal system, giv ing full play to the PR controller under stationary coordinate system to the advantage of the fundamental frequency current astatic tracking. Finally, the feasibility and effectiveness of the method are verified by simulation and experiment.

关 键 词：逆变器 比例谐振控制 幅频特性 零稳态误差 

分 类 号：TM464[电气工程—电器]