船舶直流电推系统选择特性的短路故障模拟

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

关键词:  船舶  直流电力推进系统  快速熔断器  短路故障  选择性保护

Key words:  Ship  DC electric propulsion system  Quick-fuse  Short circuit fault  Selective protection method

摘要:

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基本一致，仿真结果能有效地预测实际的短路结果及现象。本文提供了一种工程上可应用的仿真建模方法，能较准确地预测熔断器的动作情况。

Abstract:

In order to study the selective protection characteristics of ship DC thruster system after short-circuit， the main short-circuit sources， line conditions and key components after the short-circuit are analyzed. The selective protection analysis and modeling method based on equipment parameters is used to simulate the short-circuit fault of ship DC propulsion system. 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.