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 Study on the Analysis and Limitations of the Same Phase Identification Under 3-Phase Unbalanced Constant Current Loads

3상 불평형 정전류 부하 조건에서의 동 위상 판별에 대한 분석 및 한계에 관한 연구

  • 변희정 (수원대학교 IT대학 정보통신공학과) ;
  • 손수국 (수원대학교 정보통신공학과)
  • Received : 2012.03.16
  • Accepted : 2012.05.15
  • Published : 2012.06.30
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Abstract

In this paper, the necessity for the identification of the absolute phase value is introduced and analyzed for a particular conductor line of a 3-phase type distribution network and the recent methods are also introduced. For the determination of the exact phase value for a specific point in the line, as compared with the phase reference point, the measured phase value must be within a range of ${\pm}60[^{\circ}]$. However, the phase of a particular point can fluctuate depending on the line constant, transformer wiring method, line length, line amperage, etc. A theoretical formulation such as Simulink modeling and analysis for a distribution network are conducted for the identification of phase at a specific point in the line. In particular, through evaluating the effects of unbalanced current loads at the time of determination of the phase value, the limitations of the present method for the determination of phases is described.

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References

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