The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Gird-interactive Current Controlled Voltage Source Inverter System with UPS

UPS를 고려한 계통연계 전류제어형 전압원 인버터

  • 고성훈 (전북대 고급인력 양성사업단) ;
  • 임성훈 (숭실대 공대 전기공학부) ;
  • 이수원 (연세대 TMS 정보기술사업단) ;
  • 이성룡 (군산대 공대 전자정보공학부)
  • Published : 2007.06.01
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Abstract

This paper presents a grid-interactive current controlled voltage source inverter (CCVSI) with uniterruptible power supply (UPS), which uses an inner current control loop (polarized ramp time (PRT)) and outer feedback control loops to improve grid power quality and UPS. To reduce the complexity, cost and number of power conversions, which results in higher efficiency, a single stage CCVSI is used. The operation of this system could be divided into the power quality control (PQC) state mode and the UPS state mode. In PQC mode, the system operated to compensate the reactive power demand by nonlinear load or variation in load. In UPS mode. the system is controlled to provide a sinusoidal voltage at the rated value for the load when the gird fail. To verify the proposed system, a comprehensive evaluation with theoretical analysis, simulation and experimental results for 1KVA load capacity is presented.

Keywords

References

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