The Analysis and Performance Results of Bidirectional DC-DC Converter Based Dynamic Voltage Restorer under Voltage Sag/Swell Conditions

2015 IEEE European Modelling Symposium (EMS) Pub Date : 2015-10-01 DOI:10.1109/EMS.2015.45

Mustafa Inci, T. Demirdelen, K. Bayındır, M. Tümay

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引用次数: 2

Abstract

This paper presents Dynamic Voltage Restorer (DVR) based on bidirectional full-bridge dc-dc converter to compensate severe voltage sag/swell problems in medium voltage system. Voltage swell causes the continuous rise at dc-link voltage of DVR which may damage the dc-link capacitors and solid-state devices, and increase the power losses. Unidirectional dc-dc converters based DVRs do not allow power flow from dc link of inverter to battery. This condition may damage the dc-link capacitors and solid-state devices, and increase the power losses. The main contribution of this study is that bidirectional dc-dc converter permits the DVR to prevent voltage rise at DC link capacitor under severe voltage swell conditions. In this topology, power can flow both from battery to multilevel inverter and vice versa. For this propose, a control algorithm based on Proportional-Integrator (PI) control is developed for bidirectional dc-dc converter. This algorithm can keep the DC link voltage constant during voltage sag/swell. The performance results of proposed topology and control method is verified with PSCAD/EMDTC.

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电压跌落/膨胀条件下基于双向DC-DC变换器的动态电压恢复器分析及性能结果

本文提出了一种基于双向全桥dc-dc变换器的动态电压恢复器(DVR)来补偿中压系统中严重的电压跌落/膨胀问题。电压膨胀导致DVR直流电压持续升高，可能损坏直流电容和固态器件，增大功率损耗。基于dvr的单向dc-dc转换器不允许功率从逆变器的直流链路流向电池。这种情况可能会损坏直流电容和固态器件，并增加功率损耗。本研究的主要贡献是双向DC - DC变换器允许DVR在严重电压膨胀条件下防止直流链路电容器的电压上升。在这种拓扑结构中，电能可以从电池流向多电平逆变器，反之亦然。为此，提出了一种基于比例积分器(PI)控制的双向dc-dc变换器控制算法。该算法能在电压起伏时保持直流链路电压恒定。通过PSCAD/EMDTC验证了所提出的拓扑和控制方法的性能结果。

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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2015 IEEE European Modelling Symposium (EMS)

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