Analysis, design and control of a two stage improved power quality telecommunication power supply. (1st January 2012)

• Record Type: Journal Article
• Authors: Singh, Shikha; Bhuvaneswari, G.; Singh, Bhim
• Is Part Of: International journal of power electronics. Volume 4:Number 6(2012)
• Page Start: 523
• Page End: 540
• Publication Date: 2012-01-01
• Subjects: power quality -- boost rectifier -- total harmonic distortion -- THD -- switched mode power supply -- SMPS -- power factor -- PF -- boost dc-dc full bridge converter -- telecommunication power supply; Power electronics -- Periodicals; 621.31705
• Languages: English
• ISSNs: 1756-638X

Abstract

This paper deals with the power quality improvement at the utility interface of a telecommunication switched mode power supply (SMPS) of 12 kW rating. The first stage of this SMPS consists of a 6-pulse diode bridge converter that performs ac-dc conversion yielding an unregulated dc voltage. In the second stage, two boost rectifiers are connected together which feed to a boost dc-dc full bridge converter connected to the output load. By means of a closed loop control, appropriate value of third harmonic component of the current is injected using a zig-zag transformer to reduce the current harmonics distortion at the utility interface. A detailed design procedure is presented to select various components of the SMPS system.