排管敷设电缆通道有限元模型参数灵敏度研究  

Study on Parameter Sensitivity of Finite Element Model of Cable Duct Channel

作　　者：黄泽琦 罗喻扬 胡丹晖 刘瑞琪 林福昌[2] 李化[2] HUANG Zeqi;LUO Yuyang;HU Danhui;LIU Ruiqi;LIN Fuchang;LI Hua(Electric Power Research Institute,State Grid Hubei Electric Power Corporation Limited,Wuhan 430077,China;Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]国网湖北省电力有限公司电力科学研究院,武汉430077 [2]华中科技大学,武汉430074

出　　处：《高压电器》2022年第11期40-46,共7页High Voltage Apparatus

摘　　要：电缆排管敷设通道有限元数字模型的建立中,为选取敏感参数在实际环境中进行测量,基于Comsol有限元仿真软件对排管敷设电缆通道断面建模中的参数灵敏度进行研究,并结合IEC标准研究了敏感参数对电缆线芯温升的影响。结果表明建模的不确定参数中,地下水温度、深度和土壤导热系数为敏感参数。IEC标准计算电缆线芯温升时未考虑地下水的影响,当地下水深度为2 m,环境温度与地下水温度相差20℃时,IEC标准计算结果与有限元法差距可达18%。电缆排管敷设通道有限元数字模型的建立中需结合实际环境选取地下水温度、深度与土壤导热系数。In the setup of the finite element digital model of cable duct channel and in order to select sensitive param⁃eters for measurement in the actual environment,the parameter sensitivity in the section modeling of the laying cable duct channel is studied on the basis of Comsol finite element simulation software,and the influence of sensitive pa⁃rameters on the temperature rise of cable core is studied in combination with IEC standards.The results show that among the uncertain parameters of the modeling,the groundwater temperature,depth and soil thermal conductivity are sensitive parameters.In case of calculating temperature rise of cable core in accordance with IEC standards,the influence of underground water is not considered.While,when the depth of the underground water is 2 m and the difference between the ambient temperature and the temperature of the underground water is 20℃,the difference be⁃tween the calculation result by IEC standard and by the finite element method can be up to 18%.In the setup of finite element digital model of cable duct channel,the temperature and depth of underground water as well as soil thermal conductivity shall be selected in accordance with actual environment.

关 键 词：排管敷设 有限元模型 参数灵敏度 地下水 温度 载流量 

分 类 号：TM757[电气工程—电力系统及自动化]