With the continuous improvement of the level of science and technology, the ship to the intelligent, large-scale direction of development, as well as a large number of equipment upgrading, the modern ship ship on the ship more and more power equipment, power quality requirements are also more and more high, so the ship power station to withstand the pressure is also more and more big. As the ship power system is an important guarantee of ship safety, the reliability of ship power system is particularly important. The reliability of ship power system depends largely on whether the grid structure is reasonable, so the design of ship power system structure is a very worthwhile research issue. In addition, a set of highly reliable ship power system not only needs to consider the grid structure when designing, but also should consider how to quickly and effectively locate the fault and restore power supply when the fault occurs. Therefore, the fault recovery of ship power system is also an important research direction. Meanwhile, with the rapid development of China's shipping industry, the requirements for network, information and intelligence of ship management are getting higher.