UPS flux compensation techniques for transformer inrush reduction

Author

Yeh, Ming-Yang ; Chen, Yu-Hsing ; Cheng, Po-Tai ; Liao, Steven ; Tsai, Charles

Author_Institution

Center for Adv. Power Technol., Nat. Tsing Hua Univ., Hsinchu, Taiwan

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

1060

Lastpage

1065

Abstract

This paper presents two flux compensation designs for the uninterruptible power supply system. The objective of the flux compensation is to reduce the potential inrush current of the uninterruptible power supply-fed load transformer in the event of grid disturbances and load transformer engagement. The proposed methods utilize the existing voltage and current sensors, and voltage and current control loops of the uninterruptible power supply system for easy implementation. The application scenario is explained, and details of the flux compensation techniques are presented Laboratory test results are provided for validation.

Keywords

electric current control; power supply quality; transformers; uninterruptible power supplies; voltage control; UPS flux compensation technique; current closed-loop control; current sensor; grid disturbance; transformer inrush reduction; uninterruptible power supply system; voltage control; voltage sensor; Circuit faults; Couplings; Inverters; Surge protection; Surges; Uninterruptible power systems; Voltage control; flux compensation; inrush current; power quality; uninterruptible power supplies; voltage sags;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944706

Filename

5944706