The development of grand operation business such as integrated dispatching and integrated control makes higher requirements on integrated maintenance and sharing of all-service model and graphics inside a dispatching and control center. A brief description is made of the current application of integrated two-way sharing of models

graphics and calculation results between dispatching and control centers as well as the new application demand of the grand operation. An information sharing scheme of grid model and graphics applicable to the grand operation is proposed. And a thorough study is made on such aspects as integrated maintenance and sharing of all-service model and graphics inside a dispatching and control center

plus integrated two-way sharing of application models

graphics and calculation results between control centers

unified verification of model and graphics

and model information publishing. Practice shows that the scheme is able to meet the demand of the grand operation development by laying a good foundation for close coordination

unified deployment

and integrated operation within a control center and between control centers.