An Improved MPC Control of Grid-Connected Inverter - Application to PV System

Q2 Energy

International Journal on Energy Conversion Pub Date : 2018-11-30 DOI:10.15866/IRECON.V6I6.16588

M. Habib, A. A. Ladjici, M. Benbouzid

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引用次数: 2

Abstract

Model predictive control (MPC) of power converters is an efficient technique that has given recently very suitable performance. MPC can give effective tracking and regulation with fast dynamic response and robustness. The technique is based on a simple model to select which optimal voltage vector has to be applied in the next time interval without the need for a modular. The main drawback is that the switching frequency is variable and depends on the inverter operational point in terms of active and reactive power which is a typical case in photovoltaic (PV) applications. High switching frequency increases active losses in the converter and may have the risk of exceeding the allowable threshold of semiconductors. However, the very low switching frequency can degrade the produced power quality. This work proposes an improved MPC algorithm by taking into consideration the switching frequency evolution. The proposed controller looks for a trade-off between power quality and switching frequency when performing control. The proposed technique is implemented in MATLAB/SimPowerSystems, the good scenario is achieved with THD of 3.75% with a maximum switching frequency of 1200 Hz optimizing almost 90% from the maximum switching frequency when using standard MPC.

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并网逆变器的改进MPC控制——在光伏系统中的应用

模型预测控制(MPC)是一种有效的功率变换器控制技术，近年来已取得了很好的效果。MPC具有动态响应快、鲁棒性好等特点，能够进行有效的跟踪和调节。该技术是基于一个简单的模型来选择在下一个时间间隔内必须应用的最佳电压矢量，而不需要模块化。主要的缺点是开关频率是可变的，并且取决于逆变器的有功和无功运行点，这在光伏(PV)应用中是典型的情况。高开关频率增加了变换器的有源损耗，并且可能有超过半导体允许阈值的风险。然而，极低的开关频率会降低产生的电能质量。本文提出了一种考虑开关频率演化的改进MPC算法。所提出的控制器在执行控制时寻找电能质量和开关频率之间的权衡。该技术在MATLAB/SimPowerSystems中实现，THD为3.75%，最大开关频率为1200 Hz，比使用标准MPC时的最大开关频率优化近90%，达到了良好的场景。

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

International Journal on Energy Conversion Energy-Nuclear Energy and Engineering

CiteScore

3.30

自引率

0.00%

发文量

期刊介绍： The International Journal on Energy Conversion (IRECON) is a peer-reviewed journal that publishes original theoretical and applied papers on all aspects regarding energy conversion. It is intended to be a cross disciplinary and internationally journal aimed at disseminating results of research on energy conversion. The topics to be covered include but are not limited to: generation of electrical energy for general industrial, commercial, public, and domestic consumption and electromechanical energy conversion for the use of electrical energy, renewable energy conversion, thermoelectricity, thermionic, photoelectric, thermal-photovoltaic, magneto-hydrodynamic, chemical, Brayton, Diesel, Rankine and combined cycles, and Stirling engines, hydrogen and other advanced fuel cells, all sources forms and storage and uses and all conversion phenomena of energy, static or dynamic conversion systems and processes and energy storage (for example solar, nuclear, fossil, geothermal, wind, hydro, and biomass, process heat, electrolysis, heating and cooling, electrical, mechanical and thermal storage units), energy efficiency and management, sustainable energy, heat pipes and capillary pumped loops, thermal management of spacecraft, space and terrestrial power systems, hydrogen production and storage, nuclear power, single and combined cycles, miniaturized energy conversion and power systems, fuel cells and advanced batteries, industrial, civil, automotive, airspace and naval applications on energy conversion. The Editorial policy is to maintain a reasonable balance between papers regarding different research areas so that the Journal will be useful to all interested scientific groups.