Temperature Simulation of a 20 m HTS Power Model Cable System in a Fault Current for 275 kV Transmission Lines
Temperature Simulation of a 20 m HTS Power Model Cable System in a Fault Current for 275 kV Transmission Lines
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275 kV 输电线路故障电流下 20 m HTS 电力模型电缆系统的温度仿真
DOI：
10.1109/tasc.2017.2656621
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发表时间：
2017
影响因子：
1.8
通讯作者：
T. Takagi
中科院分区：
文献类型：
--
作者：
Yusuke Yokoo;T. Yasui;N. Takeda;K. Agatsuma;A. Ishiyama;Xudong Wang;M. Yagi;T. Takagi
开发了一种模拟方法，用于估计发生故障电流事故并通过过冷液氮 (LN2) 强制流动进行冷却的高温超导 (HTS) 电力电缆中的瞬态温度和压力分布。该模拟是实现实际高温超导电力电缆以评估短路事故影响的重要工具。日本275kV级输电系统发生故障时，电缆中可能流过0.6s的63kA的过大电流。当故障发生时，估计由过冷液氮强制流动冷却的电缆中的温度和压力分布非常重要。通过使用有限差分法求解热传导传热现象的非线性偏微分方程，分析了液氮冷却剂和电缆芯的温度分布。 GASPAK 软件包（Cryodata）用于评估流体特性。 275 kV级20 m模型电缆的仿真结果与福河电气获得的实验结果非常吻合。
A simulation has been developed for estimating the transient temperature and pressure distributions in a high-temperature superconducting (HTS) power cable with a fault current accident cooled by a forced flow of subcooled liquid nitrogen (LN2). This simulation is an essential tool for realizing a practical HTS power cable in order to assess the effects of short-circuit accidents. When a fault occurs in a 275 kV class power transmission system in Japan, an excessive current of 63 kA may flow in the cable for 0.6 s. When faults occur, it is important to estimate the temperature and pressure profiles in a cable cooled by the forced flow of subcooled LN2. The temperature profiles of the LN2 coolant and the cable cores were analyzed by solving nonlinear partial differential equations of the heat transfer phenomenon through heat conduction using finite-difference method. The GASPAK software package (Cryodata) was used to evaluate the fluid properties. The simulation results for 275 kV class 20 m model cable show fairly good agreement with the experimental results obtained by Fukukawa Electric.