DOI QR코드

DOI QR Code

3상 4선식 저압 배전선로에서 선형 및 비선형 부하의 사용시 전압 불평형률 비교 분석

Comparative Analysis of Voltage Unbalance Factor on the use of Linear and Non-linear loads in Three-phase Four-wire Low Voltage Distribution Line

  • Kim, Jong-Gyeum (Dept. of Electrical Engineering, Gangneung-wonju National University) ;
  • Kim, Ji-Myeong (Dept. of Electrical Engineering, Gangneung-wonju National University)
  • 투고 : 2016.10.31
  • 심사 : 2017.01.23
  • 발행 : 2017.03.01

초록

In the three-phase four-wire low-voltage power distribution equipment, single-phase and three-phase load have been used mainly mixed. Also linear and nonlinear loads have been used together in the same conditions. In a three-phase four-wire distribution line, the current distribution of three-phase linear load is almost constant in each phase during driving or stopping, but the single-phase load is different from each other for each phase in accordance with the operation and stop. So that the voltage unbalance is caused by the current difference of each phase. In the three-phase four-wire distribution system, non-linear load is used with linear load. The presence of single-phase nonlinear loads can produce an increase in harmonic currents in three-phase and neutral line. It can also cause voltage unbalance. In the present study, we analyzed for the voltage unbalance fluctuations by the operation pattern of the single and three-phase linear and non-linear load in three-phase four-wire low voltage distribution system.

키워드

참고문헌

  1. Jong-Gyeum Kim, Eun-Woong Lee., "Analysis and Measurement of Current Harmonics Due to Non-linear Load in Low Voltage System", KIEE, Vol. 50B, No. 12, pp. 601-608, 2001.12
  2. Roger C. Dugan et al., "Electrical Power Systems Quality", McGraw-Hill, 2002
  3. Jong-Gyeum Kim, Young-Jeen Park., "A Study on the Characteristics of Capacitor by Asymmetrical Voltage Unbalance", KIEE, Vol. 59P, No. 1, pp. 18-23, 2010.03
  4. P. Pillay and M, Manyange, "Definitions of Voltage Unbalance", IEEE Power Eng, Rev. Mag., Vol. 5, pp. 50-51, May 2001
  5. Jong-Gyeum Kim, et al., "A Study on the Harmonic Characteristics of Nonlinear Load operated by Unbalance Voltage", KIEE, Vol. 52B, No. 10, pp. 491-500, 2003. 10
  6. Jong-Gyeum Kim, et al., "The Comparison Study for Voltage, Current and Load Unbalance Factor", KIEE, Vol. 54P, No. 2, pp. 88-93, 2005. 06
  7. Jong-Gyeum Kim, et al., "Comparison of Voltage Unbalance Factor for Line and Phase Voltage", KIEE, Vol. 54B, No. 9, pp. 403-407, 2005. 09
  8. Jong-Gyeum Kim, et al., "Analysis on the Characteristics of Voltage Load Unbalance Factor by Load Variances", KIEE, Vol. 54P, No. 1, pp. 47-52, 2005. 03
  9. H.W. Dommel, "Electromagnetic Transients Program. Reference Manual (EMTP Theory Book)", BPA 1986.