Journal of South China University of Technology (Natural Science Edition) ›› 2016, Vol. 44 ›› Issue (2): 81-88.doi: 10.3969/j.issn.1000-565X.2016.02.013

• Power & Electrical Engineering • Previous Articles     Next Articles

Calculation Model and its Verification for Cable Emergency Time of 10 kV Three-Core Cable

LIU Gang1 WANG Peng1 LI Wen-xiang2   

  1. 1.School of Electric Power,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Guangzhou Power Supply Bureau Co.,Ltd.,Guangzhou 510620,Guangdong,China
  • Received:2015-01-07 Revised:2015-08-16 Online:2016-02-25 Published:2016-01-04
  • Contact: 刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究． E-mail:liugang@scut.edu.cn
  • About author:刘刚(1969-) ，男，副教授，主要从事智能高压电网、过电压及其防护、电力设备外缘等的研究．
  • Supported by:
    Supported by the National High-Tech R&D Program of China( 863 Program) ( 2015AA050201)

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Abstract: transient thermal circuit model of 10kV three-core cables directly laid in soil is established and simplified into an equivalent first-order RC thermal circuit.Then,the relationship between the emergency time and the core temperature is deduced by using the established model,and the temperature rising experiments of the cable are designed and carried out to measure the emergency time under different emergency loads.Finally,the measured values are compared with the calculated ones to verify the correctness of the theoretical calculation,discover the causes of error and reveal the variation of cable's emergency time under different emergency loads.The present study provides a theoretical foundation for the operation of power cables in power sectors.

Key words: three-core cable, direct burial laying, transient thermal circuit model, core temperature, emergency time, emergency load