基于拉力和倾角的输电线路覆冰厚度预测模型

Prediction Model for Icing Thickness of Power Transmission Line Based on Dynamic Tension and Dip Angle

提出一种基于拉力和倾角的输电线路覆冰厚度预测模型,弥补了现有模型忽略风偏平面影响的不足。该模型虑及风吹所形成的风偏平面内综合荷载的影响,根据耐张段轴向导线张力、悬挂点倾角、悬垂绝缘子串张力和垂直偏斜角来计算导线的覆冰厚度。以湖南省雪峰山自然覆冰试验站2012年1月的数据验证该模型的合理性,模型计算值与在线监测系统采集数据、人工测试结果基本一致,说明该模型能反映覆冰的发生、发展过程和严重程度。

A kind of prediction model for icing thickness of power transmission line based on dynamic tension and dip angle was proposed which covered the shortage of existing model ignoring affect of wind deflection plane. This model considered affect of complex load in the wind deflection plane formed by wind blows and calculated icing thickness of the conductor ac-cording to axial conductor tension of strain section,dip angle of suspension point,tension of suspension insulator chain and vertical oblique angle. Taking data of January 2012 of natural icing experiment station of Hunan Xufeng mountain for exam-ple,reasonability of this model was verified. Calculation result of the model was basically consistent with acquisition data of the online monitoring system and artificial testing result which indicated that this model could reflect generating and develo-ping process of icing and its severity degree.