The traditional maintenance and sharing method for power grid model cannot meet the requirements of various types of analysis application to power grid model quality in current ultra-high-voltage(UHV)interconnected large grid situation. A service-oriented model center architecture for power grid dispatching and control is proposed

and a model maintenance process under the model center architecture is designed. On this basis

the source side transparent maintenance

consistency commitment

maintenance authority control

model on-demand synchronization and other key technologies are implemented. The proposed power grid control model center system has been applied to a number of provincial power grid control centers. The application results show that the proposed solution can improve the consistency and accuracy of model parameters and the realism of model interaction among multi-level dispatching and control centers.