高温超导电缆在故障状态下的温升计算  

Temperature rise calculation of high temperature superconducting cable under fault conditions

作　　者：李亚西[1] 张慧媛[1] 范霄汉[1] 王银顺[1] 薛驰 滕仪 

机构地区：[1]华北电力大学高电压技术与电磁兼容北京市重点实验室新能源电力系统国家重点实验室,北京102206 [2]中天科技集团股份有限公司,上海200025

出　　处：《低温与超导》2013年第9期37-41,64,共6页Cryogenics and Superconductivity

基　　金：国家自然科学基金资助项目(51077051)资助

摘　　要：为了更好地研究高温超导电缆在电力系统中的暂态过程,有必要研究高温超导电缆温升情况。从高温超导电缆的结构出发,分析了高温超导电缆的温度特性,建立了故障状态下高温超导电缆温度分布的数学计算模型,并通过MATLAB仿真软件对220kV高温超导电缆模型进行了仿真计算。结果表明高温超导电缆超导层与屏蔽层温度在系统发生三相短路时瞬间增大,但随着故障的解除而减小;超导层与屏蔽层电阻在瞬间增大之后会随温度的增大而增大。结果验证了所提出的电缆温度数学模型的可行性。In order to analyze the transient process of the HTS cable in electric power system, it is necessary to study the temperature of HTS cable. From the perspective of the structure of HTS cable, this paper analyzed temperature characteristics of the HTS cable and established the mathematical model of the HTS cable temperature distribution under fault condition. And it simulated and analyzed 220kV HTS cable model by MATLAB. Results show that the temperatures of the superconducting layer and the shield layer of the HTS cable increased instantly when the three - phase short - circuit occurs in the system, but decrea- ses as the fault is released; and then the resistances of the superconducting layer and the shielding layer will increase with in- creasing temperature. The results verify the feasibility of the mathematical model of temperature of the cable in this paper.

关 键 词：高温超导电缆 暂态 温度分布 数学模型 电阻 

分 类 号：TM249.7[一般工业技术—材料科学与工程]