Abstract: In recent years multiple power grid outages are resulted from improper operation mode arrangement between province network and city network. In order to improve power grid operation safety and reliability, in-depth analysis is performed on defects existing in provincial and city power grid dispatching. The real-time operation data on different voltage levels scattered in provincial and city dispatch centers are integrated to realize automatic splicing of multiple sequence network topology model. The bottleneck points of network connection are searched automatically based on traversal algorithm. The loss of load is evaluated precisely in order to identify high-risk customer delivery quickly. Joint analysis is also performed on power grid real time operation control strategy. A collaborative grid model is built to identify unreasonable overlapping maintenance schedule. The realization of joint decision making of provincial and city power grid is crucial for construction of inter-provincial power network collaborative decision making platform. The practical application in provincial grid system shows that the proposed strategy can effectively avoid operating mode conflict between provincial and city grid. It also implements the collaborative decision-making on the whole grid.

Key words: cooperative analysis, joint calculation, data splicing, automatic stitching, computation model, real-time section, collaborative decision-making