一种阻感型电容换相混合式限流器  

A Resistor and Reactor Type Capacitor Commutated Hybrid Fault Current Limiter

作　　者：赵西贝 许建中 苑津莎 赵成勇 ZHAO Xibei;XU Jianzhong;YUAN Jinsha;ZHAO Chengyong(State Key Laboratory of Altemate Electrical Power System With Renewable Energy Sources (North China Electric Power University),Changping District,Beijing 102206,China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206

出　　处：《中国电机工程学报》2019年第1期236-244,共9页Proceedings of the CSEE

基　　金：国家重点研发计划资助项目(2018YFB0904600);国家自然科学基金项目(51777072)~~

摘　　要：采用半桥子模块的直流电网难以清除直流侧故障,直接采用直流断路器切断故障电流对于检测和断路设备都提出了严苛的要求。为此,该文提出一种适用于故障电流抑制的混合式故障限流器。该限流器利用限流电阻和限流电抗通过由晶闸管和换相电容组成的H桥电路实现限流过程。对所提限流器的工作原理、控制模式、电气应力和能量转移过程进行研究,并在4端直流电网中仿真验证。研究表明,所提限流器能够有效抑制电流增长,并具有较好的经济性,适用于高压直流输电的保护需求。The traditional DC grid based on half-bridge modular multilevel converter(MMC) has difficulties in fault current clearance on DC side, thus it requires advanced technology of fault detection and dc circuit breakers(DCCB). In this paper, a novel topology of hybrid fault current limiter(hybrid FCL) suitable for current limiting was put forward. The proposed FCL use resistors and current limiting reactors to realize the current limiting process through a H-bridge circuit consisting of thyristors and commutation capacitor. The principle, control method, electrical stress and energy transformation process of the proposed FCL were studied and the FCL was verified in a 4 terminal DC grid. It is shown that the proposed FCL can satisfy the protection demand in HVDC with effective current limiting result and economic efficiency.

关 键 词：故障限流器 直流电网 晶闸管 高压直流输电 

分 类 号：TM46[电气工程—电器]