Island

as an important platform for the development of marine resources

is hard to be fully developed since it is far away from mainland and the resource supply is limited with the supply of energy in particular. At present

the electricity to offshore island mainly relies on the transmission line of submarine cable and standby diesel generator

which not only has such shortcomings as high investment in equipment

long troule shooting and repair time as well as high operation and maintenance cost etc

but also causes serious influence on the environment. Therefore

it is urgently necessary to need environmentally efficient and reliable power supply mode to support the economic and social development of the island.Moreover

the new strategy of national energy transformation and development also requires the construction of a clean

low-carbon

safe and efficient energy system. In this situation

the Dachen Island in Taizhou of Zhejiang is taken as an example so to carry out the research and practice of green energy internet planning based on the integrated development of smart grid and power internet of things and deeply analyze its planning ideas and methods. In view of resources and grid status in the island

the the planning design of energy internet of Dachen Island is carried out with consideration of the energy storage configuration and access of distributed energy and with combination of grid planning and electric internet of things planning as well as with the 100% green power supply as target. The study result can provide reference for the development of electric energy in island areas of China.