Research on Technology of Lightning Disaster Risk Assessment for Power System
Xiaolan Li · Gao dianya jishu · 2011
Lightning flashover rate is the baisc evaluation index of lightning disaster risk for power system,in addition,strike automatic reclosing success rate,manual reclosing success rate,time of line operation,line priority level,power supply reliability and equipment damages also should be considered.In order to evaluate the lightning disaster risk of power system effectively,new assessment technique which takes comprehensive consideration of the whole procedure of lightning disaster risk is proposed.We build up lightning disaster risk assessment hierarchical structure model,which can be applied for comprehensive assessment according to the factors above.A whole-level power system lightning disaster risk assessment system,namely power network → lines → tower section → tower,is initiated based on the evaluation of tower section and tower.The assessment system is adopted in this paper for whole-level lightning disaster risk assessment of typical 500 kV power network,and it proves to be effective in determining lightning improvement priority and establishing lightning protection technology and strategy of power system.