关键词: 动力定位, 闭环电网, 发电机高级保护

Abstract: The marine closed-loop power grid technology is gradually maturing along with the development of technology. The closed-loop operation of the power grid has the advantages of energy-saving and emission reduction, reduced operation costs and enhanced safety and reliability. It has become the preferred choice for the DP-3 dynamic positioning drilling rig and ships. However, the traditional design of the power protection system cannot meet the requirements of the closed-loop operation of the power grid under DP-3 mode. The faulty switchboard will affect its adjacent sections and the power station does not have the same redundancy and the fault tolerance capabilities as the section operation. Various issues of the closed-loop operation of the power station are analyzed to put forward the corresponding solutions. They can be used as references for the design and operation of the DP-3 closed-loop power system.

Key words: dynamic positioning, closed-loop power grid, generator advanced protection