基于ANSYS的高压交流电缆接头载流量确定方法  

Determination Method of Current-Carrying Capacity of HVAC Cable Joint Based on ANSYS

作　　者：刘刚[1] 王鹏宇[1] 王振华[1] 徐涛 刘毅刚 韩卓展 

机构地区：[1]华南理工大学电力学院,广东广州510640 [2]广州供电局有限公司输电管理所,广东广州510310 [3]广东电机工程学会电缆专委会,广东广州510080

出　　处：《华南理工大学学报（自然科学版）》2017年第4期22-29,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划(863计划)项目(2015AA050201)~~

摘　　要：为了实现接头载流量的准确计算,提出了一种基于ANSYS的高压交流电缆接头载流量确定方法.该方法以绝缘长期耐受温度为限制条件,利用接头轴向二维有限元仿真模型计算载流量.仿真结果表明,当对流散热环境和负荷都相同时,相同导体截面的电缆接头导体温度高于电缆本体的导体温度,接头的载流能力低于同导体截面电缆的载流能力.为验证仿真模型精度,设计了接头载流量实验平台,对不同负荷下110 k V电缆接头稳态温度分布进行了实测.仿真与实验结果的对比表明,当接头导体温度超过绝缘长期耐受温度时,应用接头轴向二维有限元仿真模型计算压接管处导体温度的误差不超过1.0%,仿真计算的准确度能够满足工程应用的需求.最后,采用二分法算得110 k V 630 mm^2电缆接头载流量为1220A,比相同导体截面电缆本体在相同环境条件下的载流量减少了17.79%.研究结果表明:采用接头轴向二维有限元仿真模型计算载流量是可行的.In order to accurately calculate the current-carrying capacity of HVAC （ High-Voltage AC） cable joints, a method based on ANSYS, which employs the two-dimension finite element simulation model of the joint in axial direction and takes the insulation’s long-term tolerating temperature as the constraint condition, is presented, and, a simulation is performed, finding that, under the same natural convection and load conditions, the temperature of the joint conductor is higher than that of the cable conductor with equal sectional area, while the current-carrying capacity of the cable is better than that of the joint. Then, in order to verify the precision of the simulation model, an experimental platform to measure the joint’s current-carrying capacity is established, and the practical steady- state temperature distribution of the 110kV cable joint under different loads is measured. Moreover, a comparative analysis is carried out between the simulated and the experimental results, finding a 1. 0% error of the cable joint conductor’s temperature calculated with the finite element simulation model when the temperature exceeds the insulation’s long-term tolerating temperature, which means that the accuracy of the calculation results may satisfy the demand of engineering application. Finally, a current-carrying capacity of 1220A is obtained for the 10kV 630 mm2 cable joint by using the dichotomy, which is 17. 79% less than that of the cable body with the same conductor cross section under the same environmental conditions. Thus, it is concluded that the proposed two-dimension finite element simulation model of the joint in axial direction is feasible in calculating the current-carrying capacity.

关 键 词：高压电缆接头 载流量 二维有限元仿真 轴向传热 稳态实验 

分 类 号：TM726.4[电气工程—电力系统及自动化]