Abstract: Integrated and interconnected bulk power grid puts forward new challenges to the global and real-time data of the existing dispatching automation system. This paper puts forward the architecture and construction principle of the power grid dispatching an control real-time data platform. On this basis,some key technologies such as online synchronization of power grid model,distributed data collection and processing,large-scale parallel state estimation,unified service of real-time data are studied. And single-point acquisition and sharing of real-time data in the entire network are realized based on automatic model synchronization without maintenance. The power grid real-time dispatching and control data platform is piloted in the national electric power dispatching and control subcenter. The application results show that the proposed scheme improves the globality,real-time capability,operation and maintenance efficiency of real-time data aggregation,and it could provide comprehensive,real-time and accurate snapshots of real-time data and state estimation data in the entire power grid for power grid analysis and decision-making applications.