基于舰船电力系统的磁饱和型限流器的研究

Analysis of magnetic saturation FCL based on systems of naval ships

舰船电力系统容量的不断增大使得短路电流水平大幅度提高。现有开关的分断能力已经无法满足短路保护的要求,必须对短路电流峰值加以限制。研究了磁饱和型限流器的工作原理,根据经典电机暂态分析理论,得到了电感合适值的计算公式。建立了基于simulink下SimPowerSystems模块库的仿真模型,对系统加FCL前后的短路过程进行了仿真研究,仿真结果与理论计算吻合良好,证明理论结果是可信的。

With the accretion of naval ships power system capacity, the amplitude of short circuit current increases greatly, consequently the disjuncting capacity of the present switch can not fulfill the demand of short circuit protection. Therefore, the amplitude of short circuit current must be limited. The working principle of magnetic saturation FCL is discussed, and based on the theory of typical machine transient analysis, the formula of calculating suitable inductance is obtained. The simulation model using SimPowerSystems module of simulink is established and the simulation analysis is carried out during short circuit when the system equipped with or without FCL. Simulation results accord with the theoretical calculation ones, which proves the theoretical analysis is believable.