Fault diagnosis is an important application of the power grids monitoring system. Under the situation\nof continuous development of smart grid, it brings new challenges to the fault diagnosis technology.\nA fault diagnosis expert system based on model driven approach is proposed in this paper.\nAnd the corresponding fault modeling technology based on Fault Logic Description Language\n(FLDL) is described step by step. Practices show that this system could meet the requirements of\nprocessing fault alarm information rapidly and reliably by operator.
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