Use of a Series Voltage Compensator for Reduction of the DC-Link Capacitance in a Capacitor-Supported System

被引：192

作者：

Wang, Huai ^{[1
]}

Chung, Henry Shu-Hung ^{[2
]}

Liu, Wenchao ^{[2
]}

机构：

[1] Aalborg Univ, Dept Energy Technol, Ctr Reliable Power Elect CORPE, DK-9220 Aalborg, Denmark

[2] City Univ Hong Kong, Ctr Smart Energy Convers & Utilizat Res, Kowloon, Hong Kong, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2014年 / 29卷 / 03期

关键词：

Capacitance reduction; dc-link capacitor; power conversion system; voltage compensator; ACTIVE POWER FILTER;

D O I：

10.1109/TPEL.2013.2262057

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A technique for reduction of the dc-link capacitance in a capacitor-supported system is presented. The concept is based on connecting a voltage source in series with the dc bus line to compensate the ripple voltage on the dc-link capacitor, so as to make the output have a near zero ripple voltage. Since the voltage compensator processes small ripple voltage on the dc link and reactive power only, it can be implemented with low-voltage devices. The overall required energy storage of the dc-link, formed by a reduced value of dc-link capacitor and the voltage compensator, is reduced, allowing the replacement of popularly used electrolytic capacitors with alternatives of longer lifetime, like power film capacitors, or extending the system lifetime even if there is a significant reduction in the capacitance of electrolytic capacitors due to the aging effect. Comprehensive analysis on the static and dynamic characteristics of the system, and hold-up time requirement will be discussed. The proposed technique is exemplified on an ac-dc-dc power conversion system. Theoretical predictions are favorably verified by experimental results.

引用

页码：1163 / 1175

页数：13

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