Recent years, intelligent grid attracted broad attention. A base system structure to realize intelligent grid functions was indicated. Distributed selfstateestimating was adopted to estimate grid realtime working condition. Based on the structure, fault detection, load balance, minimizing grid loss, power supply reliability and other applications of intelligent grid were detailed discussed. This intelligent grid structure has broad application prospect, can be referred for intelligent grid construction.

intelligent grid, system structure, state estimation, failure detection, load balance, grid loss