电测与仪表2024，Vol.61Issue(1)：52-58,7.DOI:10.19753/j.issn1001-1390.2024.01.008
基于有限元法的谐波作用对电缆及其接头的影响研究
Research on the influence of harmonic action on cable and its joint based on FEM
摘要
Abstract
Most of the existing researches on cable and its joint temperature are based on the fundamental wave.With the wide application of nonlinear load in power grid,the harmonic content of transmission lines increases significantly.The in-fluence of harmonics on the additional loss and temperature rise of cable and its joint cannot be ignored.In this paper,taking 64/110 kV single-core cable and its joint as examples,the finite element analysis models(FEM)are established.Based on electromagnetic-thermal field coupling method,the influences of harmonic content and harmonic times on the ca-ble and its joint are analyzed.Equivalent current factor is introduced to calculate the cable temperature rapidly under co-existence of multiple harmonics environment.The simulation results show that the loss and temperature of cable are related to both harmonic contents and harmonic times.Moreover,harmonics may cause overheat points at crimping clamp,which would accelerate the insulation aging.The introduction method of equivalent current factor has high accuracy in the esti-mation of cable temperature under co-existence of multiple harmonics environment.This paper provides a basis for the de-sign,the prediction of operating temperature and the evaluation of thermal aging life of cables and their joints under har-monic environment.关键词
电力电缆/电缆接头/谐波作用/有限元分析/损耗/温度Key words
power cable/cable joint/harmonic action/FEM/loss/temperature分类
信息技术与安全科学引用本文复制引用
黄艺英,曾江..基于有限元法的谐波作用对电缆及其接头的影响研究[J].电测与仪表,2024,61(1):52-58,7.
