桥式固态短路限流器在电网中的应用研究  

APPLICATION RESEARCH OF BRIDGE TYPE SOLID STATE CURRENT LIMITER ON POWER SYSTEM

作　　者：谭凌云[1] 吴兆麟[1] 

机构地区：[1]浙江大学电力电子国家专业实验室,杭州310027

出　　处：《电力系统自动化》2000年第18期41-44,共4页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目!(5 97770 2 2 )

摘　　要：随着电网容量的不断扩大 ,短路电流的限制技术已成为故障保护的一个研究热点。文中结合电力电子技术的应用 ,介绍了一种新颖的桥式固态限流器拓扑。介绍了桥式限流器的基本工作原理 ,阐明了它对电力系统的正常运行无明显影响 ,而在短路故障发生时可以几乎无时延地自动插入一个阻抗以限制短路电流值 ,而且在断开短路电流时不会引起附加的振荡和过电压。利用桥式电路的特点 ,该限流器还能实现无电流冲击的软自动重合闸。As the expanding of power system capacity,the technologies of shortcircuit current limiting in power system s have been concerned greatly.This paper introduces a novel bridge type solid state current lim iter with power electronic technology.Itis shown that in normal operation condition the limiter has no obvious effect atloads.However itwill insert an im pedence autom atically without delay to lim it the short circuit current when fault happens.There is no oscillation as well as overvoltage excited by the limiter when the fault current is switched off.With the control strategy proposed,the soft reclosing without impact can be realized by the bridge type current lim iter. This project is supported by National Natural Science Foundation of China No.5 97770 2 2 .

关 键 词：电力系统 短路 故障限流器 桥式电路 

分 类 号：TM471[电气工程—电器]