【摘要】 随着大长度大截面的电力电缆在隧道的普及,电缆支架因涡流损耗造成的线损、以及发热产生温升形变等问题也日益严重。文中采用有限元数值计算方法,以110 kV单相电缆及其钢支架为研究对象,进行了电磁场—流场—温度场耦合计算。将电磁场计算得到的涡流损耗作为温度场计算的热源载荷,同时考虑空气自然对流的散热方式,从而计算出电缆支架的温度分布。最后进行电缆支架温升实验,将仿真得到数据和实验数据进行对比,验证电缆支架温升计算的准确性和有效性。更多还原

【Abstract】 The application of large-length and large-section power cable in cable tunnel leads to the serious line loss caused by eddy current in cable support and the thermal deformation of cable support.Taking 110 kV single-phase cable and its cable support as research objects and adopting the finite element numerical calculation method to calculate its electromagnetic-fluid-thermal coupling field.The eddy current loss calculated by the electromagnetic field is taken as the heat source load in fluid-thermal field,and the heat dissipation mode of the natural convection of the air is considered,thereby calculating the temperature distribution of the cable support.Finally,temperature rise experiment of cable support is conducted,and the simulation data are compared with the experimental one to verify the accuracy and effectiveness of the temperature rise calculation of cable support.更多还原