The research for establishment of judgment matrices for the fault type of distribution network based on fuzzy comprehensive evaluation

In respect of the research on the strategy of fault types diagnostic problem, because of the randomness and uncertainty of the fault sign in the distribution network, and the question of many fault types are hard to judge, putting forward building the hierarchical indices system of fault classification for distribution network fault, and discussing a direct method that judgment matrices of AHP convert to fuzzy judgment matrices. This method could be used to simplify establishment of fuzzy matrices and then fix weight of all kinds of faults of different equipment that may affect entire grid. Adopting the method of fuzzy comprehensive evaluation to evaluate the fault happened in distribution network, which could do tradeoff analysis for each affected factors, solving the problem of serious distortion or multiple peak values result from many factors then small weight for each factors. In this way, the evaluation criteria will satisfy the practice demand of the project. Thus, the effectiveness of the proposed method in diagnosing fault types of distribution network was verified by experimental results.