Vulnerability Analysis Of Interconnected Power Grid Based On Climate - Weighted Small World Network

Electric power system is the most complex and biggest artificial network in the world by far. It comprises power generation part, transformer substation and electric customers, and all parts are interconnected by lines of different voltage grade. As development economics arisen, interconnected power system is an inexorable trend to further meet the need of people’s production and life. The wide use of electrical energy raised the human life to an unprecedented height. Yet now electric power system blackout accidents occur frequently to cause commercial business, industrial production and transportation inconvenience and bring about a sizable economic loss. Therefore, the biggest and complex electric power system’s frailties, fault propagation mechanism and fault suppression strategy are just the major problems for researchers.Meteorological factors, operation parameters of power network and the topology of system are influence on the large-scale electric power system frailties. The electrical network control factors of the external factors and internal factors are analyzed comprehensively can assess the electric power system frailties more real, exact and reliable.In view of the complex weather condition, this article presents the algorithm of weighted small-world network based on meteorological factors. Combined with extreme climate conditions and power of electric power system, we can get the weighted of every line. Then author consider the topological change of electric power system to calculate indexes and analyze electric power system frailties under extreme climate conditions. In order to validate the effectiveness of this method, this paper builds a fault simulation model of the IEEE-118 nodes power system. The result indicates that this method can comprehensive consideration all factors to assess large electric network more credible and provide reliable basis for short-term operation and long-term planning.