直流限流器中IGBT关断时过电压的研究

直流电力系统短路时电流很大，在限流器内部换流过程中，线路分布电感会产生峰值很大的尖峰电压。本文简单的介绍了限流器的内部换流过程，通过计算说明过电压的来源以及抑制措施，并且建立了限流器具体模型，说明电路中电感、电容、电阻对过电压的影响，对吸收电容的选择有一定的实际意义；此外能量转移到吸收电容中，会使电容电压增加，本文分析了这个电压的后果，提出了解决措施。

Research on Overvoltage in DC Fault Current Limiter

The current in short circuit is very large in DC power system.During the current commutation in fault current limiter,there is a very sharp over-voltage Ldi/dt by the distribute inductance of circuit.This paper presents the course of current commutating in FCL briefly,and explains the source of over-voltage and the suppression measures.At last,the paper analyses the relation of the overvoltage and other parameters.This investigation has important practical significance for the choose of suppression capacita...