6GELA G,DAI J J. Calculation of thermal fields of underground cables using the boundary element method[J].IEEE Transactions on Power Delivery,1998,(03):1341-1347.
7ANDERS G J,CHAABAN M,BEDARD N. New approach to ampacity evaluation of cables in ducts using finite element technique[J].IEEE Transactions on Power Delivery,1987,(03):969-975.
10International Electrotechnical Commission. Calculation of the current rating-part 1:current rating equations(100% load factor) and calculation of losses[S].Geneva,Switzerland:IEC,2006.