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Research of regional power grid running state evaluation based on projection pursuit and ranking interval number

On the base of considering the safety, reliability, economy, power quality in the power grid running and so on, the paper established a set of comprehensive evaluation indexes system for the regional power grid running state. Then it determined the evaluation indexes weight by the projection pursuit method, and defined the priority order for the evaluation objects by the theory of possibility degree and ranking in the ranking interval number method. Therefore, it constructed a comprehensive evaluation model for the regional power grid running state. After a comprehensive evaluation analysis for the power grid running state in five regions, it showed that the comprehensive evaluation indexes system and model for regional power grid running state proposed in the paper was feasible.