Upward leader development model of lightning strike wind turbine and its stable initial criterion
The study of the upward leader development process in the lightning strike model of wind turbines is an important foundation for the design of lightning protection systems for wind turbines.Building on the existing positive polarity upward leader development model,this paper introduces a model for the upward leader development of wind turbine blades.This model takes into account the changes in background potential near the blades and the impact of space charges in the streamer region on the background potential.The curve of the upward leader elongation is obtained through model calculation,and a criterion for the"inflection point"of this curve is proposed to determine the stable initiation of the upward leader.When the upward leader exceeds the inflection point,its elongation increases rapidly.Furthermore,the variation law of the upward leader velocity with time was obtained based on the elongation curve.At the same time,the model considers the impact of different tip curvature on the upward leader.Compared with existing upward leader initiation criteria and observed lightning conditions,the accuracy of the upward leader development model built in this paper is demonstrated.
万方数据
维普
