Discrete time quasi-sliding mode-based control of LCL grid inverters

IF 0.6 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Facta Universitatis-Series Electronics and Energetics Pub Date : 2023-01-01 DOI:10.2298/fuee2301133p

M. Petronijević, C. Milosavljevic, B. Veselić, S. Huseinbegović, B. Perunicic

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引用次数: 1

Abstract

Application of a discrete time (DT) sliding mode controller (SMC) in the control structure of the primary controller of a three-phase LCL grid inverter is presented. The design of the inverter side current control loop is performed using a DT linear model of the grid inverter with LCL filter at output terminals. The DT quasi-sliding mode control was used due to its robustness to external and parametric disturbances. Additionally, in order to improve disturbance compensation, a disturbance compensator is also implemented. Also, a specific anti-windup mechanism has been implemented in the structure of the controller to prevent large overshoots in the inverter response in case of random disturbances of grid voltages, or sudden changes in the commanded power. The control of the grid inverter is realized in the reference system synchronized with the voltage of the power grid. The development of the digitally realized control subsystem is presented in detail, starting from theoretical considerations, through computer simulations to experimental tests. The experimental results confirm good static and dynamic performance.

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基于离散时间准滑模的LCL电网逆变器控制

介绍了离散时间滑模控制器(DT)在三相LCL电网逆变器主控制器控制结构中的应用。利用输出端带有LCL滤波器的栅极逆变器的DT线性模型，设计了逆变器侧电流控制环。DT准滑模控制具有对外部和参数扰动的鲁棒性。此外，为了提高系统的扰动补偿能力，还设计了扰动补偿器。此外，在控制器的结构中实施了特定的抗绕组机制，以防止在电网电压随机干扰或命令功率突然变化的情况下逆变器响应的大幅超调。并网逆变器的控制是在与电网电压同步的参考系统中实现的。从理论考虑出发，通过计算机仿真和实验测试，详细介绍了数字实现控制子系统的开发。实验结果表明，该系统具有良好的静态和动态性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Facta Universitatis-Series Electronics and Energetics ENGINEERING, ELECTRICAL & ELECTRONIC-

自引率

16.70%

发文量

审稿时长

20 weeks