Mechanical monitoring and risk assessment under ice disaster based on wireless sensor network

Ice disaster has becoming a significant threat to power system security since recent years. Wireless sensor networks guarantee reliability of information communication under ice disasters, due to their self-organization and the advantage that master stations are not involved. It is recommended to be applied on power grid structure security monitoring and assessment. It is proposed that different type of sensor nodes should be settled on overhead transmission lines, to comprehensively monitor mechanical status of a certain area. A two-layer sensor network model is presented for overcoming the communication range limitations of sensor nodes. Using the data obtained, a novel power system financial risk assessment method is proposed to balance the probability and seriousness of icing caused supports break, which helps grid structure progress in a long term.