Analysis of voltage tolerance of AC adjustable-speed drives for three-phase balanced and unbalanced sags

被引:77
作者
Bollen, MHJ [1 ]
Zhang, LDD [1 ]
机构
[1] Chalmers Univ Technol, Dept Elect Power Engn, S-41296 Gothenburg, Sweden
关键词
adjustable-speed drives; power quality; power system reliability; voltage sags;
D O I
10.1109/28.845069
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Adjustable-speed drives are the type of equipment most sensitive to voltage sags. This paper analyzes the behavior of three-phase ac adjustable-speed drives during balanced and unbalanced sags. Emphasis is placed on the de-bus voltage and on the drop in speed, both assuming that the drive will not trip. By using a previously introduced classification of three-phase unbalanced sags, voltage-tolerance curves are obtained for ac adjustable-speed drives. The conclusion from the analysis is that voltage sags due to three-phase faults are a serious problem for adjustable-speed drives. However, single-phase and phase-to-phase faults, causing the majority of voltage sags, can be tolerated by adding a relatively small amount of de-bus capacitance.
引用
收藏
页码:904 / 910
页数:7
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