• Title, Summary, Keyword: Deicing Current Estimation

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A Study on Deicing Current Estimation Technique and Configuration Process for Deicing System in the Conventional Line (기존선 해빙시스템을 위한 해빙전류 예측기법 및 구성 절차에 관한 연구)

  • Kwon, Sam-Young;Park, Young;Jung, Ho-Sung
    • Journal of the Korean Society for Railway
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    • v.9 no.2
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    • pp.237-243
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    • 2006
  • Deicing system is to melt frost or ice freezed in catenary line when the temperature is lower than $0^{\circ}C$ in winter. The principle of deicing system is to melt frost or ice by Joule heat of catenary impedance. The performance of deicing is dependant of deicing current determined by the length of deicing section, deicing impedance and current division ratio of catenary line and messenger line. So, we present technique for estimating deicing current and process for determination of deicing section in the conventional line. Deicing impedance is estimated using Carson-Pollaczek equation, and current division ratio of catenary line and messenger line is estimated using voltage drop, and deicing current is estimated using power system data of deicing system. For the determination of the final deicing section, we verified estimated value comparing with experiment value of deicing impedance and current division ratio of catenary line and messenger line using low voltage experiment. Finally, we verified the validity of estimation technique and process using a simulated test data of real deicing system operation in the Chungju Substation, Chungbuk line.

Estimation Technique of deicing current for configuration of deicing system in conventional line (기존선 해빙시스템 구성을 위한 해빙전류 예측기법)

  • Jung, Ho-Sung;Kwon, Sam-Young;Park, Young;Ahn, Byeong-Lib;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.288-290
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    • 2005
  • Deicing system operated in high speed line is to melt frost or ice freezed in catenary line when the temperature is lower than 0 in winter. The principle of deicing system is to m디t frost or ice by Joule heat of catenary impedance. The performance of deicing is dependant of deicing current determined by the length of deicing section, deicing impedance and current division ratio of catenary line and messenger line. So, We present technique for estimating deicing current in convention line. Deicing impedance is estimated using Carson - Pollaczek, current division ratio of catenary line and messenger line is estimated using voltage drop, and deicing current is estimated using power system data of operation secion for deicing system in this technique. To verify the validity of technique, we compare the estimated current using technique of this paper with deicng current of high speed line.

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Knowledge Engineering Method Ie Estimation of Snow Accretion on Power lines and Decision of Deicing Countermeasures (지식공학에 의한 전선 착설 예측 및 대책 결정 기법)

  • 최규형
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.17 no.3
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    • pp.95-102
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    • 2003
  • To Prevent the damage of power system facilities by snow accretion on transmission lines, a prototype expert system has been developed. The system has the basic functions of forecasting snow accretion on transmission lines and making a list of all feasible and effective deicing countermeasures to assist power system operators. As estimating of snow accretion on power lines and making countermeasure plans are very difficult to solve analytically, knowledge engineering can be an effective method for this problem. The heuristics about the effect of weather conditions on the snow accretion process on power lines and power system operation for the deicing constitutes main nile base. Simulation results based on past snow accretion accident data show that the proposed system is very premising.