The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
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Novel Switching Strategy of 1MVar STATCON using Cascade Multilevel Voltage Source Inverter for FACTS Application

FACTS 적용을 위한 직렬형 멀티레벨 전압형 인버터를 사용한 1MVar STATCON의 새로운 스위칭기법

  • Min, Wan-Gi (Dept.of Electric, Choson University Technology college) ;
  • Min, Jun-Gi ;
  • Choe, Jae-Ho (Dept. of Electric Electronic Engineering, Chungbuk National University)
  • Published : 1999.12.01
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Abstract

This paper proposes a novel switching strategy of 1Mvar STATCON using cascade multilevel H-bridge inverter(HBI) for FACTS application. To control the reactive power instantaneously, the d-q dynamic system model is described and analyzed. A single pulse pattern based on the SHEM(Selective Harmonic Elimination Method) technique is determined from the look-up table to reduce the line current harmonics and a rotating fundamental frequency switching scheme is presented to adjust the DC voltage of each inverter capacitor at the same value. So the voltage unbalance problem between separately DC bus voltage is improved by using the proposed switching scheme. As a result, the presented inverter configuration not only reduces the system complexity by eliminating the isolation at the AC input side transformer but also improves the dynamic response to the step change of reactive power.

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References

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