전송로의 직렬리앤턴스 산정 시 Carson 모델의 적용범위 검토

Study of the Applicability of the Carson Line Model for the Series Reactance Calculation of the Power Feeding Lines with no Ground Return

  • 발행 : 2009.02.01

초록

In this paper, it is shown that Carson's equation can still be applied for the calculation of the series reactance of transmission lines with no ground return current as well as the one with ground return. It is proved in the following method. First two voltage drop equations for three-phase three wire transmission line are derived, one without considering ground return and the other using Carson's equation. The impedance matrix of the two equations are different from each other. But if we put the condition of zero ground current, $I_a+I_b+I_c=0$, those two equations becomes the identical equations. Therefore even a transmission line is not grounded, its line parameters can still be obtained using the Carson's equation. It has been confused whether or not Carson's equation can be used for an ungrounded system. It is because where ever Carson's equation is shown in the book, it also says that the system has ground return current paths as a premise. It is also verified with EMTP studies on the test circuit.

키워드

참고문헌

  1. Paul M Anderson, , Analysis of Faulted Power Systems', IEEE Press Power Systems Engineering Series, Chapter 4', Power Math Associates, Inc, 1995
  2. 한국고속철도건설공단, '고속철도 연구보고서(전기분야) pp 49', 1996
  3. Hadi Saadat, 'Power System Analysis 2nd Ed., Ch.4.6', International Edition, Mc Graw Hill, 2004