基于dSPACE的单相并网逆变器控制策略研究  

Research on Control Strategy of Single-Phase Grid-Connected Inverter Based on dSPACE

作　　者：夏梓豪 李玉东[1] XIA Zihao;LI Yudong(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China)

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454003

出　　处：《电子科技》2023年第3期62-68,共7页Electronic Science and Technology

基　　金：河南省重点研发与推广专项(科技攻关)项目(20210220094);河南省自然科学基金(182300410480)。

摘　　要：针对电压畸变导致并网电流谐波含量较高的问题,文中提出准比例谐振控制与电压前馈相结合的控制策略。结合准比例谐振控制器在谐振频率处增益无穷大的特点,减小并网电流稳态误差,并引入电压前馈消除电压对系统影响,达到了改善并网电流质量的目的。文中分析了单相并网逆变器数学模型,通过闭环控制来抑制因电压畸变产生的并网电流谐波分量,同时采用控制变量法设定准比例谐振控制器参数,分析准比例谐振控制器参数对系统性能的影响。最后建立MATLAB/Simulink仿真模型并搭建dSPACE-DS1104半实物仿真平台,通过不同策略下的仿真与实验验证了所提策略的有效性。In view of the problem of high harmonic content of grid-connected current caused by voltage distortion, a control strategy combining quasi-proportional resonance control and voltage feed-forward is proposed in this study. Considering the infinite gain of the quasi-proportional resonance controller at the resonant frequency, the steady-state error of grid-connected current is reduced, and the voltage feed-forward is introduced to eliminate the influence of voltage on the system, so as to improve the quality of grid-connected current. The structure of single-phase grid-connected inverter is analyzed, the harmonic component of grid-connected current caused by voltage distortion is suppressed by closed-loop control, and the parameters of quasi-proportional resonance controller are set by control variable method, so as to analyze the influence of parameters of quasi-proportional resonance controller on system performance. Finally, the MATLAB/Simulink simulation model and the dSPACE-DS1104 hardware-in-the-loop simulation platform are established to verify the effectiveness of the proposed strategy under different strategies.

关 键 词：并网电流 电压前馈 闭环控制 谐波分量 准比例谐振 零稳态误差 MATLAB/Simulink 仿真分析 

分 类 号：TM464[电气工程—电器] TP273[自动化与计算机技术—检测技术与自动化装置]