【摘要】 提出将带旁路电感的桥式短路故障限流器中的半控开关器件——可控硅,用大功率自关断器件——集成门极换流晶闸管(IGCT)代替,从而将整流桥的失控时间从半个周期缩短到电流信号检测时延,从而可以有效减小直流限流电感的电感量,将占据限流器体积、重量、成本主要部分的直流限流电感量缩小5/6以上。研究了在该特定电路条件下的基于IGCT的有源逆变控制方法,可以保证在采用IGCT后,桥路转入逆变工作方式和从限流器中退出时均不引起电感电流通路的阻断,因而不引起操作过电压。直流限流电感的电感量减小,有利于提高限流器动态特性,缩减由于充磁而导致波形畸变的时间。详细介绍了基于IGCT的短路故障限流器的控制策略,并进行了仿真和实验研究,结果证明了所提出的故障限流器及其控制策略的有效性和实用性。更多还原

【Abstract】 This paper proposes to substitute the half - controllable power devices SCR in the bridge type fault current limiter (FCL) with bypass inductor with integrated gate commutated thyristor (IGCT). The inductance of the DC inductor can be reduced greatly by cutting down the uncontrolled time of the bridge. As a result, the cost, weight and volume of the FCL can be reduced greatly. No over-voltage and oscillations is activated when bridge switches to inverter mode and exits from the systems, that improves the dynamic performance of the proposed FCL. The magnetization time of the DC inductor while some harmonics induced is reduced. Control strategies of the IGCT based FCL are described in detail. Simulation and experiment results Drove the practicability and validitv of the new FCL.更多还原