Mitigation of Voltage Disturbances Using Dynamic Voltage Restorer Based on Direct Converters

被引:100
作者
Babaei, Ebrahim [1 ]
Kangarlu, Mohammad Farhadi [1 ]
Sabahi, Mehran [1 ]
机构
[1] Univ Tabriz, Fac Elect & Comp Engn, Tabriz 51664, Iran
关键词
Direct three-phase to single-phase converter; dynamic voltage restorer (DVR); flicker; harmonics elimination; voltage sag; voltage swell; COMPENSATION; TOPOLOGIES; DVR;
D O I
10.1109/TPWRD.2010.2054116
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
In this paper, two new topologies are proposed for three-phase dynamic voltage restorers (DVRs). These topologies are based on direct converters. The proposed topologies do not require dc-link energy storage elements. As a result, they have less volume, weight, and cost. They can also compensate long-time voltage sags and swells. The proposed DVRs can compensate several types of disturbances, such as voltage sags, swells, un-balances, harmonics, and flickers. Moreover, due to the fact that the compensation voltage for each phase is taken from all three phases, the proposed topologies can compensate one-phase outages. In the proposed topologies, three independent three-phase to single-phase direct converters are used. Each converter operates independently and, as a result, the proposed DVRs properly compensate unbalanced voltage sags and swells. The used converters can be constructed by four or six power switches. Depending on the structure of the used converters, the compensation ranges will be different. A new control method is also proposed for using direct ac/ac converters. The experimental and simulation results verify the capabilities of the proposed topologies in compensation of voltage distortions.
引用
收藏
页码:2676 / 2683
页数:8
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