船舶直流电推系统选择特性的短路故障模拟

为了研究船舶直流电推系统发生短路后的选择性保护特性,对短路发生后的主要短路源、线路状况及关键器件进行分析,采用基于设备参数的选择性保护分析与建模方法,对船舶直流电推系统选择性进行短路故障模拟.针对工程船舶应用,搭建与实际系统对应的仿真模型,对比仿真结果及短路试验结果可以看出,熔断器熔断时间、电压变化趋势及电压跌落情况都...

Short Circuit Fault Simulation for Selection Characteristics of Ship DC Electric Propulsion System

In recent years, DC electric propulsion system has been used for ships more and more. In order to ensure the reliability of propulsion system, the scheme based on fast fuse is widely used in the market. However, how to accurately calculate the short circuit, predict the short circuit phenomenon and select the type of fast fuse based on this is always a hot topic in the ship industry. To solve this problem, the main short-circuit sources, line conditions and key components were analyzed when the ship DC electric propulsion system was short circuited. In order to apply to most engineering applications, the selective protection analysis and modeling method based on equipment parameters was used to build the selective protection model of ship DC system based on fuse. According to the application of a certain engineering ship, a simulation model corresponding to the actual system was built. By comparing the simulation results with the short-circuit test results, it was shown that the fuse fusing time, voltage change trend and voltage drop were basically the same. The simulation results could effectively predict the actual short-circuit results and phenomena. A simulation modeling method that can be applied in engineering has been provided, which can accurately predict the action of fuse, and provide strong support for the selection of fast fuse and system configuration in the system design stage.