Journal of Information Processing Systems

Korea Information Processing Society (한국정보처리학회)
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Power Cable Ampacity and Influential Factors Analysis under Operation

  • Tong, Qiang (School of Mechanical, Electrical and Information Engineering, Shandong University) ;
  • Qi, Jianping (School of Mechanical, Electrical and Information Engineering, Shandong University) ;
  • Wang, Yanling (School of Mechanical, Electrical and Information Engineering, Shandong University) ;
  • Liang, Likai (School of Mechanical, Electrical and Information Engineering, Shandong University) ;
  • Meng, Xiangxing (State Grid Heilongjiang Electric Power Company Ltd) ;
  • Zhang, Qiang (Shandong Electric Power Dispatching Control Center)
  • Received : 2017.04.25
  • Accepted : 2018.05.10
  • Published : 2018.10.31
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Abstract

With the increasing of urban electricity demand, making the most use of the power cable carrying capacity has become an important task in power grid system. Contrary to the rated ampacity obtained under extremely conservative conditions, this paper presents the various steady value of cable ampacity by using the changing surrounding parameters under operation, which is based on cable ampacity calculation equation under the IEC-60287 standard. To some degree, the cable ampacity analysis of actual surroundings improves the transmission capacity of cables. This paper reveals the factors that influence cable ampacity such as insulating layer thickness, allowable long-term conductor temperature, the ambient temperature, soil thermal resistance coefficient, and so on, then gives the class of the influence of these parameters on the ampacity, which plays a great role in accurately calculating the real-time ampacity and improving the utilization rate of cable in the complex external environment condition. Furthermore, the transient thermal rating of the cable is analyzed in this paper, and temperature variation of the conductor under different overload conditions is discussed, which provides effective information for the operation and control of the system.

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References

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