船用低压直流智能配电控制策略

Ship-Applied Low-Voltage DC Smart Power Distribution Control Strategy

在船舶直流配电领域,传统配电器件的故障响应速度较慢,且不具备限流功能,故在启动大电流冲击性负载时,极易导致母线电压大幅跌落或配电支路误保护,短路故障亦会对整个配电网络造成巨大危害。针对该问题,提出一种适用于低压直流配电系统的智能配电技术。该技术能自动辨识不同负载类型及其工作状态,实现负载在遭受大电流冲击时的电流抑制和在短路时的快速分断保护,有效提升负载的智能化管理能力。研制1台24 V/2 kW的试验样机对该策略的有效性进行验证,结果表明该策略是有效且可行的。

In the field of marine DC power distribution,the fault response speed of traditional power distribution devices is slow,and they do not have the function of current limiting.Therefore,when starting a large current impact load,it is very easy to cause a significant drop in bus voltage or false protection of distribution branches.Short circuit fault will also cause great harm to the entire distribution network.To solve this problem,an intelligent power distribution technology suitable for low-voltage DC power distribution system is proposed.This technology can automatically identify different load types and their working states,realize current limiting when the load is subjected to large current impact and instantly cut off the branch when the load is short circuited,and effectively improve the intelligent management capability of the load network.A 24 V/2 k W test prototype is developed to verify the effectiveness of the strategy,and the results show that the strategy is effective and feasible.