隧道电缆载流量计算及其影响因素分析  

Ampacity Calculation for Cable in Cable Tunnel and Its Influencing Factors

作　　者：李巍巍[1] 侯振奇 吴科[2] 张星海[1] 甘德刚[1] 

机构地区：[1]国网四川省电力公司电力科学研究院,四川成都610072 [2]四川大学电气信息学院,四川成都610065

出　　处：《电力科学与工程》2017年第5期55-59,共5页Electric Power Science and Engineering

摘　　要：研究了某地区电缆隧道内110 kV电缆实际运行情况下,不同排列方式对电缆载流量的影响。通过有限元仿真软件建立了隧道内电缆温度场的三维有限元仿真模型,计算了水平和三角形两种不同排列方式下电缆的温度场分布,对比分析了不同排列方式下的电缆载流量大小,并通过电缆温升实验验证了仿真结果的可靠性。结果表明:两种不同排列方式下电缆载流量大小存在明显差异,水平排列三相电缆载流量明显大于三角形排列,其中水平排列时B相电缆载流量提高5.0%,AC两相电缆载流量提高9.5%。基于以上发现,电缆隧道内高压电缆采用水平排列方式更利于改善电缆的温度场分布和提高电缆的传输功率。In the case of the actual operation of a 110 kV tunnel cable in a certain area, the influence of the different arrangement modes on the ampacity of power cables was investigated. A simulation model is set up to calculate the tem- perature field distribution for the tunnel cable by the finite element simulation software, and the ampacity of the power cables with two kinds of arrangement modes is analyzed as well, and the reliability of the simulation model is also proved through the cable temperature rise experiment. The result shows that there are obvious differences between the ampacity of power cables under two different arrangement modes. The ampacity of B phase cables is 5.0% higher while the ampacity of AC phases cables is 9.5% higher than that of triangular arrangement. Based on the above findings, compared with the triangular arrangement, the horizontal arrangement of the high - voltage cable is of greater advantage to better the temperature field distribution and improve the transmission power of the cable.

关 键 词：电缆 排列方式 温度场 载流量 

分 类 号：TM73[电气工程—电力系统及自动化]