Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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A Design of a High Performance UPS with Capacitor Current Feedback for Nonlinear Loads

비선형 부하에서 커패시터 전류 궤환을 통한 고성능 UPS 설계

  • 이우철 (한경대학교 전기공학과) ;
  • 이택기 (한경대학교 전기공학과, IT융합기술연구소)
  • Received : 2012.03.29
  • Accepted : 2012.04.23
  • Published : 2012.05.31
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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.

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References

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