本文针对国内首制DP-3闭环电力系统的船舶设计要求，分析了推进器配置、电力负荷及单线图，结合DP动力能力校核，对上海打捞局新型深潜水工作母船进行了优化设计。然后，将本船“三机舱四DP分区”式闭环电站的整体结构及设备冗余分组，探讨了配电板双路供电设计及电网闭环运行时的保护设计。

In response to a leading vessel design requirement that cooperating DP-3 closed ring power system, this paper introduce an optimize design of a new deep-water diving support vessel of Shanghai Salvage Bureau from the analysis of the thruster configuration, electric load balance and single line diagram, combined with the DP capability assessment. Then, we divide the overall structure and equipment redundancy grouping of the vessel’s closed ring power station on account of “three-engine rooms, four-DP zones” design. Meanwhile, this paper discusses the design of dual feeding power supply for a special separated switchboard and the protection logic during closed ring operation.