谐波对单芯电缆的影响研究  

Study of the Effects of Harmonics on Single-core Cables

作　　者：王玉珺 闫家里 WANG Yujun;YAN Jiali(State Grid Jiangsu Electric Power Co.,Ltd.,Maintenance Branch Company,Nanjing 211102,China)

机构地区：[1]国网江苏省电力有限公司超高压分公司,南京211102

出　　处：《吉林电力》2025年第1期43-47,共5页Jilin Electric Power

摘　　要：针对谐波对电缆的影响,以单芯电缆为例,介绍单芯电缆结构,分析电缆谐波阻抗模型,建立等效热路模型,利用数学方法和仿真分析对谐波干扰电缆损耗、交流电阻、温度等进行分析,考虑不同因素对电缆损耗和温度的影响。结果表明,当截面积为1000 mm^(2)、谐波次数为50次时,金属护套损耗接近0.8;谐波含量为30%、谐波次数为13次时,缆芯温度最高达106.5℃。Regarding the impact of harmonics on cables,taking single-core cable as an example,this paper introduces the single-core cable structure,analyzes the cable harmonic impedance model,establishes the equivalent thermal circuit model,and uses mathematical methods and simulation to analyze harmonic interference cable losses,AC resistance and temperature,considering the effects of different factors on cable losses and temperature.The results show that when the cross-sectional area of 1000 mm^(2),the harmonic number of 50 times,the metal sheath loss is close to 0.8,harmonic content of 30%,the harmonic number of 13 times,the cable core temperature up to 106.5℃.

关 键 词：谐波 单芯电缆 电磁-热耦合 损耗 

分 类 号：TM247[一般工业技术—材料科学与工程] TM751[电气工程—电工理论与新技术]