The configuration, network, emergency shutdown (ESD) level, the interface and output of technical documents of the ESD system are presented according to the specific requirements of ESD systems on a DP-3 drillship and the corresponding rules and standards. The basic methods and the characteristics of the ESD design are summarized to give an independent design method for the ESD system of the DP-3 drillship.

The key points of power system design for 4 000 t crane vessels are reviewed and summarized based on a self-propelled crane vessel. According to the configuration and layout of the propulsion system, the design scheme of independent propulsion grid is firstly determined in order to meet the design requirements of DP-2 ships. The configuration and characteristics of the key facilities in the power system are then introduced, including the application of the common DC bus and motor generator set in this project. Finally, the power distribution mode under the various working conditions are explained with the distribution network of the 4 000 t crane vessel, and the application and main functions of the power management system are described.