Browse > Article

The Comparison Study for Voltage, Current and Load Unbalance Factor  

Kim, Jong-Gyeum (국립 원주대 전기과)
Park, Young-Jeen (국립 원주대 전기과)
Lee, Eun-Woong (충남대 공대)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers P / v.54, no.2, 2005 , pp. 88-93 More about this Journal
Abstract
Most of the LV customer have been applied the distribution system of 3-phase four wire system because of its advantage of supplying both of 1-phase & 3-phase loads simultaneously. Due to its structural simplicity, it is more convenient for use rather than the conventional separated scheme. But uneven load distribution or unclean voltage quality has occurred various problems such as de-rating, losses increase and vibration, etc. In this paper, voltage, current and power waveform in the actual fields have measured and analyzed in relation with internationally allowable voltage unbalance limits and compared the current unbalance factor with the load unbalance factor.
Keywords
Voltage Unbalance Factor; Load Unbalance Factor; 3phase 4wire system; Power Quality;
Citations & Related Records
연도 인용수 순위
  • Reference
1 김종겸, 박영진, 정종호, 이은웅, '불평형 전압 운전시 유도전 동기의 동작 특성 해석' 대한전기학회 논문지(B), 제 53권,6 호, pp.372-379, 2004.6
2 전기설비기술기준 제 291조(전압불평형에 의한 장해방지)
3 P. Pillay and M. Manyange, 'Definitions of voltage unbalance', IEEE Power Eng, Rev. Mag., vol.5, pp.50-51, May 2001
4 IEEE std 1159-1995, 'IEEE Recommended practice for monitoring electric power quality'
5 김종겸, 이은웅, 박영진, '3상 4선식 부하설비의 전압불평형율 허용기준(안) 제정' 중간보고서, 2004. 9
6 내선규정 제 115절 1항, '불평형부하의 제한'
7 NEMA MG-1-2003, 'Motors and Generators'