Research on Grid-Generation Coordination Control of Tibet Power Grid after the Central Tibet Interconnection Project

This paper analyzes the characteristics of the Southwest Power Grid after the operation of the Central Tibet interconnection project. Considering the characteristics of the small scale of grid, the long-chain power transmission and the strong effect between generation and grid, the coordinated optimizing control scheme is used to improve the grid-generation coordination. It establishes a hierarchical Grid-Generation Coordinated Optimizing Control (GCOC) system based on the event-driven mechanism to realize multi-objective optimization, and the cross-iterative method is applied to solve the problem of mutual effect between AGC and AVC systems. The scheme improves the economy, security and quality of the grid operation. It solves the problem of the large-scale DC transmission system with the small-scale grid and the long-chain power transmission in Tibet Grid. The simulation results prove that the method can significantly improve the grid-generation coordination and reduce the operation risk during the development period of Southwest Power Grid.