基于PSCAD的饱和铁心型超导限流器性能分析  

Performance analysis of saturated core-type superconducting current limiter based on PSCAD

作　　者：王通 姚磊 奚培锋 常路宇 李之豪 耿延 WANG Tong;YAO Lei;XI Peifeng;CHANG Luyu;LI Zhihao;GENG Yan(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Key Laboratory of Smart Grid Demand Response,Shanghai 200063,China)

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海市智能电网需求响应重点实验室,上海200063

出　　处：《电力系统保护与控制》2020年第5期72-80,共9页Power System Protection and Control

基　　金：国家自然科学基金项目资助(51707121);上海市科委计划项目资助(18DZ1203502)~~

摘　　要：为了准确分析饱和铁心型超导故障限流器性能,根据参数设计要求建立了限流器三段式数学模型。研究了其在不同工作区间的静态特性以及在短路限流过程中的阻抗变化。在单机系统无穷大系统中,针对限流器阻抗变化将故障过程细分为不同阶段分析其对暂态稳定造成的影响。通过PSCAD仿真发现,串入固定感抗模型与限流器模型后极限切除时间分别为0.31 s和0.21 s。结果表明限流器具有较好的限流作用,提高了系统的暂态稳定性,且该模型能得到更准确的极限切除时间。In order to accurately analyze the performance of the saturated iron core type superconducting fault current limiter,a three-stage mathematical model of the current limiter is established according to the requirements of parameter design.The static characteristics in different working areas and the impedance changes during short-circuit current limiting are studied.In the single machine infinite bus system,the fault process is subdivided into different stages for the change of the current limiter impedance to analyze its impact on transient stability.Through PSCAD simulation,it is found that the critical clearing time of the fixed inductance model and the current limiter model are 0.31s and 0.21s respectively.The results show that the current limiter has better current limiting effect and improves the transient stability of the system,and the model can obtain more accurate critical clearing time.

关 键 词：超导 饱和铁心 阻抗变化 暂态稳定 极限切除时间 

分 类 号：TM471[电气工程—电器]