DP3 deepwater drilling ship closed loop high voltage distribution system

Abstract

A DP3 deepwater drilling ship closed loop high voltage distribution system is a 11kV high voltage distribution system, including six 7370kWe / 11kV / 60Hz diesel generators, three 11kV high voltage distribution panels capable of being connected in a ring, six sets of electric power propelling systems, four drilling well variable frequency transformers, six ship auxiliary transformers, and three drilling well auxiliary transformers. The three high voltage distribution panels adopt A60 segmentation therebetween. The diesel generators G1 and G2, the diesel generators G3 and G4, the diesel generators G5 and G6 supply power to a busbar A or B of the three high voltage distribution panels respectively. In a DP3 mode, closed loop electric power supplying is achieved for different DP redundancy devices and the whole system load, the maintenance time is shortened, the operation flexibility and the fuel economy are improved, and the harmful gas emission is reduced. The oil consumption can be reduced by 11%, nitric oxide emission is reduced by 35% and carbon dioxide emission is reduced by 20%, and the host maintenance cost is reduced by 50%.

Description

technical field [0001] The invention relates to the structure improvement technology of the power distribution system of marine engineering equipment, and belongs to the technical field of circuit devices or systems for power supply or power distribution classified by IPC H02J, especially the closed-loop high-voltage power distribution system of DP3 deepwater drilling ship. Background technique [0002] At present, offshore deepwater drilling has gradually become the focus of oil resource exploration and development. For example, the South China Sea is the fourth largest oil and gas accumulation basin in the world. The proven oil geological reserves have exceeded 40 billion tons, accounting for more than one-third of China's oil resources. Deepwater drilling The platform has also developed to the sixth generation accordingly. The main technical standards, the maximum operating water depth has exceeded 3,000 meters, the maximum drilling depth has exceeded 10,000 meters, and th...

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Problems solved by technology

[0006] The knowledge required by the industry needs in the existing deep-sea oil development is not covered by the content of the prior art including the above documents. In particular, the closed-loop high-voltage power distribution system that meets the production needs of the DP3 deep-water drilling ship is still serious. lack of

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