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http://dx.doi.org/10.5207/JIEIE.2012.26.5.071

A Design of a High Performance UPS with Capacitor Current Feedback for Nonlinear Loads  

Lee, Woo-Cheol (한경대학교 전기공학과)
Lee, Taeck-Kie (한경대학교 전기공학과, IT융합기술연구소)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.26, no.5, 2012 , pp. 71-78 More about this Journal
Abstract
This paper presents a digital control solution to process capacitor current feedback of high performance single-phase UPS for non-linear loads. In all UPS the goal is to maintain the desired output voltage waveform and RMS value over all unknown load conditions and transient response. The proposed UPS uses instantaneous load voltage and filter capacitor current feedback, which is based on the double regulation loop such as the outer voltage control loop and inner current control loop. The proposed DSP-based digital-controlled PWM inverter system has fast dynamic response and low total harmonic distortion (THD) for nonlinear load. The control system was implemented on a 32bit Floating-point DSP controller TMS320C32 and tested on a 5[KVA] IGBT based inverter switching at 11[Khz]. The validity of the proposed scheme is investigated through simulation and experimental results.
Keywords
Double Regulation Loop; Digital Control; Nonlinear Load; Capacitor Current Feedback;
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Times Cited By KSCI : 2  (Citation Analysis)
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