基于多物理场耦合的高压电缆温度监控及仿真技术研究

Research on High-Voltage Cable Temperature Monitoring and Simulation Technology Based on Multi-physical Field Coupling

随着电力行业的不断发展,电缆在其中扮演着越来越重要的角色。而电缆常常由于温度过高造成运行故障,引发经济损失,因此电缆运行过程的温度变化值得我们深入研究。在城市电力建设中,电缆隧道敷设因其负载能力高、便于管理和巡检等优点而越来越被广泛使用,但目前鲜有关于隧道敷设多回高压电缆线路布置优化的研究。为了充分利用隧道内的电缆的负载能力,本文针对电缆隧道内高压电缆测温装置单一、无法有效利用其它传感器的数据进行电缆绝缘温度监测的问题,提出用多物理场耦合仿真软件及有限元分析法对高压电缆内部绝缘层温度进行仿真计算。成果预期能够通过仿真计算,能够真实有效地反映在高压电缆运行过程中绝缘层所承受的长期工作温度,对预防电缆绝缘热老化具有积极作用。

With the ongoing development of the electric power industry,cable plays an increasingly important role.The cable often fails due to high temperature,resulting in economic losses,so the temperature change of cable operation process is worth our in-depth study.In urban power construction,cable tunnel laying is more and more widely used because of its advantages such as high load capacity,easy management and inspection.Currently,there are few studies on optimizing the layout of multi-loop high-voltage cable laying in tunnels.In order to make full use of the load capacity of the cable in the tunnel,this paper aims to address the problem that the temperature measurement device of the high-voltage cable in the cable tunnel is single,and the data of other sensors cannot be effectively used to monitor the cable insulation temperature,and proposes to use the multi-physical field coupling simulation software and finite element analysis method to simulate the temperature of the internal insulation layer of the high-voltage cable.The results are expected to truly and effectively reflect the long-term working temperature of the insulation layer in the running process of the high-voltage cable through the simulation calculation,which has a positive role in preventing the thermal aging of the cable insulation.