对比分析了采用LQR和PID控制器的SEPIC变换器的性能

2017 21st International Conference on System Theory, Control and Computing (ICSTCC) Pub Date : 2017-10-01 DOI:10.1109/ICSTCC.2017.8107141

Artun Sel, Uygar Güneş, Övünç Elbir, C. Kasnakoğlu

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引用次数: 8

摘要

本研究的目的是为SEPIC(单端初级电感转换器)转换器设计一个LQR控制器，SEPIC转换器广泛应用于工业DC-DC电源转换，也开始广泛应用于光伏应用。采用电路平均法获得给定系统的数学模型。基于小信号模型设计了控制器。采用LQR控制器和PID控制器对SEPIC进行控制，并对其性能进行了分析。采用卡尔曼滤波器作为观测器获取LQR控制所需的系统状态。在MATLAB/SIMULINK中对给定控制器下的系统性能进行了仿真分析。可以看出，LQR方法在各种标准方面都优于PID。

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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Comparative analysis of performance of the SEPIC converter using LQR and PID controllers

The purpose of this study is to design a LQR controller for the SEPIC (Single-Ended Primary-Inductor Converter) converter which is widely employed in industrial DC-DC power conversion and is also starting to see widespread use in PV applications. Circuit-Averaging-Method is used to acquire the mathematical model of the given system. Controllers are designed based on the Small-Signal model. LQR and PID controllers are used to control SEPIC and their performances are analyzed. A Kalman Filter is used as an observer to acquire the system states which are necessary in LQR control. The performances of the system with given controllers are analyzed with simulations in MATLAB/SIMULINK. It is seen that the LQR approach outperforms PID in terms of various criteria.

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2017 21st International Conference on System Theory, Control and Computing (ICSTCC)

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