|
|
|
| Numerical Method to Calculate the Transient Temperature Field and Short-Term Ampacity of Underground Cable System |
| Liang Yongchun1, 2, Li Yanming1, Li Yanmu1, Wang Zhenggang3, Li Zhongkui3 |
| 1. Xi'an Jiaotong University Xi'an 710049 China 2. Hebei University of Science and Technology Shijiazhuang 050054 China 3. Zhengzhou Electric Power Company Zhengzhou 450006 China |
|
|
|
|
Abstract Finite difference method (FDM) is used to divide the transient temperature calculation process of underground cable systems into discrete groups of transient time step, and finite element method (FEM) is used to calculate each time step-temperature distribution of underground cable systems, and the transient temperature distribution of underground cable systems is calculated. Based on the calculation of the transient temperature distribution, short-term ampacity of underground cable systems is calculated by Newton iteration method. The result of test and calculation show that the method with FEM and FDM is an effective method to calculate the transient temperature field and short-term ampacity of underground cables in engineering.
|
|
Received: 08 October 2007
Published: 17 February 2014
|
|
|
|
|
|
[1] IEC 60287—1. Calculation of the current rating—part 1: current rating equations (100% load factor) and calculation of losses[S]. 2001.
[2] IEC 60287—2. Calculation of the current rating—part 2: thermal resistance[S]. 2001.
[3] IEC 60287—3. Calculation of the current rating—part 3: sections on operating conditions[S]. 1999.
[4] George J Anders. Rating of electric power cables-ampacity computations for transmission, distribution, and industrial applications[M]. IEEE Power Engineering Society, 1997.
[5] 曹惠玲, 王增强, 李雯靖, 等. 坐标组合法对直埋电缆与土壤界面温度场的数值计算[J]. 电工技术学报, 2003, 18(3): 59-63.
[6] Pascal Vaucheret, Hartlein R A, et al. Ampacity derating factors for cables in short segment of conduit[J]. IEEE Transactions on Power Delivery, 2005: 1-6.
[7] 梁永春, 李彦明, 柴进爱, 等. 地下电缆群稳态温度场和载流量计算新方法[J]. 电工技术学报, 2007, 22(8): 185-190.
[8] IEC949. Calculation of thermally permissible short- circuit currents, taking into account non-adiabatic heating effects[S]. 1998.
[9] 马国栋.电线电缆载流量[M]. 北京：中国电力出版社, 2003.
[10] 孔祥谦. 有限单元法在传热学中的应用[M]. 3版. 北京：科学技术出版社, 1998.
[11] 陶文铨. 数值传热学[M]. 2版. 西安：西安交通大学出版社, 2001.
[12] Ferkal K, Poloujadoff M. Proximity effect and eddy currency losses in insulated cables[J]. IEEE Transactions on Power Delivery, 1996, 11(3).
[13] 吴命利, 范瑜. 圆导线内阻抗的数值计算[J]. 电工技术学报, 2004, 19(3):52-58. |
|
|
|
2009, Vol. 24 
