高电压技术2023，Vol.49Issue(12)：5002-5010,9.DOI:10.13336/j.1003-6520.hve.20220940
基于暂态热流耦合仿真的沟内密集堆积配电电缆群载流能力预测及新增负荷优化配置
Ampacity Prediction of Densely Stacked Distribution Cables in Trench and Optimal Alloca-tion of New Load Based on Transient Thermal-fluid Coupling Simulation
摘要
Abstract
Distribution cables accumulation in trench is common,which intensifies the thermal impact among cables and reduces their ampacity.In this paper,according to the actual situation of a substation outgoing cables in trench,a ther-mal-fluid coupling simulation model is established,and the simulation accuracy is verified by its measured temperature.Load current is applied to the model,and their operating status is simulated.COSMOL with MATLAB co-simulation and differential evolution algorithm are used to predict their ampacity of no-load,heavy-load and section cables,and to opti-mize the configuration of the given new load on the light-load cables and all cables.The results show that,remaining the other conditions,the position and the load around the cable affect its heat dissipation and then affect its ampacity.The difference between the maximum and minimum ampacity predicted of the four no-load cables is about 8.8％.The higher the initial load is and the higher the temperature of cables is,the smaller the ampacity increase coefficient will be.Transi-ent heat flow coupling simulation combined with differential evolution algorithm can maximize the predicted ampacity of cables,make the new load distribution more reasonable,and reduce their temperature.关键词
沟内电缆群/暂态温度/载流能力/负荷配置/差分进化法Key words
cables in trench/transient temperature/current carrying capacity/load allocation/differential evolution引用本文复制引用
范华,翁利国,平伟军,练德强,李小潇,牛海清..基于暂态热流耦合仿真的沟内密集堆积配电电缆群载流能力预测及新增负荷优化配置[J].高电压技术,2023,49(12):5002-5010,9.基金项目
浙江中新电力工程建设有限公司科技项目(HDXS3-2110037).Project supported by Science and Technology Project of Zhejiang Zhongxin Power Engineering Construction Corporation(HDXS3-2110037). （HDXS3-2110037）
