Abstract: For the better application of the index system in the operation practice of power grid, the implementation method of online operational analysis and aided-decision system （OOAADS） was introduced in detail from three aspects: index selection, hardware architecture and software architecture, based on the index system for the transmission operational evaluation proposed by the authors and the actual condition of Fujian power grid. Firstly, combined with the actual requirements of Fujian power grid, the index that should be used in the OOAADS was chosen from aspects of results evaluation and reasons evaluation. Secondly, the hardware composition of system server and its function allocation, the software architecture and its key technologies were introduced. Lastly, this paper described the process of eliminating event of the OOAADS in two typical out-of-limit cases occurred in the practical operation of the transmission grid. The results show that the OOAADS is feasible and effective for evaluating the running state of power grid and providing aided-decision, which is helpful to guide the operation practice of power system.

Key words: operation evaluation of power grid, index system, results evaluation, reasons evaluation