单芯电缆实时载流量计算方法研究  

Research on Real-time Calculation Method of Carrying Capacity of Single-core Cable

作　　者：李伟[1] 曾宏[2] 杨琳[2] 朱轲[2] 

机构地区：[1]四川省电力公司,四川成都610054 [2]四川电力科学研究院,四川成都610072

出　　处：《四川电力技术》2011年第4期61-64,共4页Sichuan Electric Power Technology

摘　　要：以电缆温度在线监测为基础,结合实时负荷数据和温度信息,采用有限元方法,对单芯电缆温度场进行分析,实时计算地下电缆的温度场和载流量。该计算方法考虑了外部土壤热阻的实时计算和更新,用环境温度、表面温度和实时负荷来间接计算。实验表明:该方法能准确获取电缆温度场和实时载流量,对提高电缆运行可靠性和输送能力具有重要意义。Based on on-line monitoring of cable temperature,and combined with real-time load data and temperature information,the temperature field of single-core cable is analyzed by using finite element method,which calculates the temperature field and carrying capacity of underground cable.The method takes the thermal resistance of the soil into account,which is calculated indirectly with ambient temperature,surface temperature and real-time load.The experiments show that cable temperature field and real-time carrying capacity can be obtained by the proposed method,which is of great significance in improving the operation reliability and transmission capacity of the cable.

关 键 词：载流量实时计算 表面温度 温度场 有限元法 

分 类 号：TM751[电气工程—电力系统及自动化]