Topology design of variable speed drive systems for enhancing power quality in industrial grids

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2024-09-30 DOI:10.1016/j.epsr.2024.111114

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Abstract

In the last two decades, a rapid increase in the utilization of non-linear loads within electrical grids has been observed. Consequently, elevated levels of harmonics are found in both voltage and current waves, and adverse effects on power quality are caused. In this context, the variable speed drive (VSD) systems are considered a significant non-linear contributor. To mitigate the harmonic content in VSD systems, various techniques are explored, such as electronic smoothing inductor incorporation in the DC-link, active filters utilization at the grid side, and passive filters integration. A technique centered on the reconfiguration of the DC-link in the VSD systems is proposed in this paper to improve the overall performance of the VSD systems. The configuration comprises two transistors and two diodes, along with smoothing inductors and a capacitor to enhance power quality in the VSD systems. The utilization of three-stage sine pulse width modulation (SPWM) control technology ensures accurate control of the switches, generating optimal control signals that enhance the power quality of the voltage and current waves at the grid side. The effectiveness of the proposed approach is tested via time-domain simulation in MATLAB/Simulink under both constant and variable loading conditions and is verified using a laboratory prototype. The obtained results demonstrate a notable improvement in power quality, showcasing reduced total harmonic distortion (THD) in AC voltage and current waveforms, as well as minimized ripple factor in the DC-link when compared to existing methods.

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提高工业电网电能质量的变速驱动系统拓扑设计

近二十年来，电网中非线性负载的使用率迅速上升。因此，电压波和电流波中的谐波水平升高，对电能质量造成不利影响。在这种情况下，变速驱动（VSD）系统被认为是一个重要的非线性因素。为了减轻 VSD 系统中的谐波含量，人们探索了各种技术，如在直流链路中加入电子平滑电感器、在电网侧使用有源滤波器和集成无源滤波器。本文提出了一种以 VSD 系统直流链路重新配置为中心的技术，以提高 VSD 系统的整体性能。该配置包括两个晶体管和两个二极管，以及一个平滑电感器和一个电容器，以提高 VSD 系统的电能质量。利用三级正弦脉宽调制（SPWM）控制技术可确保开关的精确控制，产生最佳控制信号，从而提高电网侧电压波和电流波的电能质量。在恒定和可变负载条件下，通过 MATLAB/Simulink 时域仿真测试了所提方法的有效性，并使用实验室原型进行了验证。结果表明，与现有方法相比，该方法显著改善了电能质量，降低了交流电压和电流波形中的总谐波失真（THD），并最大限度地降低了直流链路中的纹波系数。

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

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.