直流组网电力推进系统选择性保护设计与验证

Design and Verification of Selective Protection for DC Power Station Electric Propulsion System

随着国际海事组织和各国政府对船舶排放的要求越来越高,使用综合电力推进系统的船舶越来越受到市场的青睐,对于采用电力推进系统的船舶,需要对其进行进行选择性保护。它使用电流和电压信号进行监测,并以可调节的方式来检测系统故障。文章结合某新造船实例,简述选择性保护原则,从选择性保护方案开始,分析了不同短路类型的保护机理与选择性实现原理,对关键保护元件的选择,对与保护计算相关的设备分别进行了建模,并建立系统短路故障分析模型对各类型短路进行了仿真分析与保护策略验证。

With the increasing requirements of the International Maritime Organization and governments on ship emissions,ships using integrated electric propulsion systems are increasingly favored by the market.For ships using electric propulsion systems,selective protection is required.It uses current and voltage signals to monitor and detect system faults in an adjustable manner.Based on a new shipbuilding example,the principle of selective protection is briefly described.Starting from the selective protection scheme,it analyzes the protection mechanism and selective realization principle of different short circuit types,selects the key protection elements,models the equipment related to the protection calculation,and establishes the system short circuit fault analysis model to carry out simulation analysis and protection strategy verification for each type of short circuit.