Journal of KIEE

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

An Equivalent Load Sharing by Wireless Parallel Operation Control in UPS

  • Byun, Young-Bok (Power Electronics Group at Korea Electrotechnology Research Institute(KERI) 28-1, Seongju dong, Changwon, 641-120) ;
  • Koo, Tae-Geun (School of Electrical and Electronic Engineering at Teungnam university, Dae dong, Kyungsan, Kyung buk, 712-749) ;
  • Joe, Ki-Yeon (Power Electronics Group at Korea Electrotechnology Research Institute(KERI) 28-1, Seongju dong, Changwon, 641-120) ;
  • Kim, Dong-Hee (School of Electrical and Electronic Engineering at Teungnam university, Dae dong, Kyungsan, Kyung buk, 712-749) ;
  • Kim, Chul-U (School of Electrical and Electronic Engineering at Pusan National University, 30 Changjeon dong, Keumjeong-Ku, Pusan, 609-735)
  • 발행 : 2000.09.01
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초록

An equivalent load sharing control based on the frequency and voltage droop concept for parallel operation of two three-phase Uninterruptible Power Supply (UPS) systems with no control interconnection lines is presented in this paper. First of all, due to the use of active power and reactive power as control variables, the characteristics of output powers according to amplitude and phase differences between output voltages of two UPS systems are analyzed. Secondly, simulation results under different line impedance demonstrate the feasibility of the wireless parallel operation control. Finally, experiments are presented to verify the theoretical discussion with two three-phase 20kVA UPS systems employed TMS320C32, a kind of real time digital signal processor (DSP).

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