Analyze on the ice-covering recurrence Interval of power grid based on PSO optimization

摘要

Calculation of ice-covering recurrence interval for power grid is of great significance for anti-ice design of the transmission line. As a common probability distribution curve, the P-III distribution can be used to analyse the recurrence interval of power grid. To avoid the disadvantages of the P-III distribution, the curve fitting method based on particle swarm optimization (PSO) is proposed in this paper. Hunan distribution map of ice-covering days for recurrence period of 15 years is also presented.