中文摘要：

分析了国内外现有电缆谐波模型发展情况及其适用范围的局限性,进而提出利用热电拟合表征电缆有功损耗下的温升模型.为减少模型输入量,结合屏蔽层连接方式,引入谐波背景下电缆屏蔽层电流计算方法.综合考虑谐波情况下集肤效应、邻近效应对磁场分布的影响,考虑多相电缆敷设方式,提出了一种新型的谐波损耗相结合的多相电缆谐波温升模型,该模型具有良好的收敛速度.最后,利用该模型对电缆谐波温升进行计算仿真,证明了模型的有效性和实用性.

英文摘要：

Firstly,the development of the existing cable harmonic models at home and abroad and their scope limitations are analyzed.Then the use of thermoelectric temperature model to fit the characterization of cable power loss is put forward.To reduce the model input,the shielding layer connections are combined.The cable shielding current calculation method under harmonic backgrounds is introduced.Skin effect and the proximity effect on the magnetic field distribution are comprehensively considered under the harmonic case.Considering the multiphase cable laying modes,a new harmonic temperature model of combination multiphase cables is proposed combined with the harmonic loss,which has a good convergence rate.Finally,the cable harmonic temperature rise is simulated by using the model,which proves the validity and practicability of the model.