偏流切换桥路型高温超导故障限流器的实验研究  

Experimental Research on a Novel Rectifier Type High Temperature Superconducting Fault Current Limiter Based on Bias DC Voltage Source Change Over

作　　者：张晚英[1] 周有庆[1] 赵伟明[2] 张绪红[3] 朱青[1] 黎福海[1] 王耀南[1] 李中发[1] 陈洪云[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082 [2]湖南省水利水电科学研究所,湖南省长沙市410007 [3]广东技术师范学院,广东省广州市510635

出　　处：《中国电机工程学报》2008年第6期116-122,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(60375001)~~

摘　　要：研究了应用于三相电力系统中偏流切换桥路型高温超导故障限流器实验室样机。正常工作情况,在电桥上引入直流偏置电流,不出现限流;短路故障情况,整流桥中的直流偏流影响限流效果,将直流偏置电压源切换到限流电阻,使故障电流限制到预定的范围。研究了该限流器的工作原理,分析限流参数的变化对其限流特性的影响。实验和仿真表明,该限流器有很好的限流和重合闸能力,能显著减少暂态及稳态的故障电流,有效提高系统的动态稳定性和电网的电能质量。A novel rectifier type high temperature superconducting fault current limiter for a three-phase power system is developed. When normal operating, no current limiting mode occurs through the application of DC bias current to the bridge, and at the time of fault, the fault current limiting capability decrease due to the bias DC current. An idea is to put a resistor in series with the superconducting coil for absorbing the incoming energy into the coil, and turn the switch on and off to disconnect the DC bias voltage source from the rectifier in order to control the fault current in a pre-set region. The operating theory of the new fault current limiter is discussed, and the effect of parameters variety of HTSCFCL is analyzed on limiting fault current. The simulation and experimental results show that the device is of good limiting and re-closing capability, and demonstrates that the device can reduce both the transient and the steady-state fault current significantly. The device is of great benefit to improve transient stability and enhance the electrical energy quality of power system.

关 键 词：高温超导限流器 直流偏置电压源 整流器 仿真 短路电流 

分 类 号：TM26[一般工业技术—材料科学与工程]