电力系统保护与控制2017，Vol.45Issue(12)：121-127,7.DOI:10.7667/PSPC160840
基于数值天气预报的输电线路风偏闪络预警方法
Method for windage yaw flashover warning of transmission lines based on numerical weather prediction
摘要
Abstract
Current windage yaw warning methods of transmission lines are generally implemented by on-line monitoring devices,and these methods rarely involve effective evaluation on flashover risk of the air gap between line and tower after windage yaw,which leads to weak applicability and unsatisfactory warning effect in engineering.This paper takes the traditional windage yaw research achievements into account,and proposes a method for windage yaw flashover warning of transmission lines based on numerical weather prediction.Firstly,wind speed predicted in grid is mapped into the tower by using inverse distance weighted interpolation algorithm.Wind speed vertical to line is calculated by using the angle between wind direction and line trend.Then,cup type tower is taken to solve the minimum air gap by rigid rod method as an example.Finally,the flashover voltage of the minimum air gap under standard atmospheric conditions is amended by air density,humidity and rainfall to obtain the flashover voltage under the forecast weather conditions,which is utilized to realize windage yaw flashover warning by compared with the system operating voltage.This method provides a viable and effective risk control measure for windage yaw flashover on transmission lines which are in strong wind area but the on-line monitoring devices are difficult to install on,and it has the vital practical significance on power grid disaster prevention and mitigation caused by windage yaw.关键词
数值天气预报/反距离加权插值/风偏闪络/预警Key words
numerical weather prediction/inverse distance weighted interpolation/windage yaw flashover/warning引用本文复制引用
王海涛,谷山强,吴大伟,卢恩泽,郭钧天,陶汉涛,钟俊文..基于数值天气预报的输电线路风偏闪络预警方法[J].电力系统保护与控制,2017,45(12):121-127,7.基金项目
This work is supported by Science and Technology Project of State Grid Corporation of China (Real-time Evaluation and Warning of Electrical Reliability for UHV Transmission Line Based on Meteorological Parameters).国家电网公司总部科技指南项目“基于气象参数的特高压输电线路电气可靠性实时评估与预警” （Real-time Evaluation and Warning of Electrical Reliability for UHV Transmission Line Based on Meteorological Parameters）
