摘要
采用有限元法对双回路排管敷设方式下的电缆线路进行计算,比较低频与工频传输时电缆的温度场;计算了不同型号电缆在2种典型敷设方式下的提升效率。以国内某变电站送出工程为例,对电缆中各项损耗进行分析,结果表明,低频输电对输送容量的提升作用以及对电缆工况的改善效果明显,电缆截面积越大,降低频率对传输容量的提升效果越明显。该分析结果可为低频工程中的电缆选型提供参考。
First,the finite element method(FEM)is used to calculate the cable lines under double-circuit mode,and the temperature fields of the cable in cases of low-frequency and power-frequency transmission are compared.Then,the efficiency improvement of different types of cables under the two typical laying modes is calculated.The paper analyzes losses in cables in a transmission project of a substation in China.The result indicates that low-frequency transmission can greatly improve the transmission capacity and working condition of cables.The greater the cross-sectional area of the cable,the more obvious the effect of low-frequency on the transmission capacity.These conclusions provide a reference for cable selection in low-frequency transmission project.
作者
孙永军
陈科技
陈赛慧
丁一凡
朱仁杰
SUN Yongjun;CHEN Keji;CHEN Saihui;DING Yifan;ZHU Renjie(State Grid Zhejiang Economic Research Institute,Hangzhou 310016,China;State Grid Jiaxing Power Supply Company,Jiaxing Zhejiang 314000,China)
出处
《浙江电力》
2021年第10期60-65,共6页
Zhejiang Electric Power
基金
国网浙江省电力有限公司经济技术研究院专项项目(JY02202124)。
关键词
低频输电
电力电缆
有限元分析
载流量
温度场
low-frequency AC transmission
power cable
finite element analysis
ampacity
temperature field
