对操作过电压高海拔修正简化计算公式的探讨

Discussion on High Altitude Correction Simplified Calculation Formula of Switching Overvoltage

为研究海拔对操作过电压放电电压的影响,根据现行输电线路设计规程、规范及IEC的计算原则和公式,通过数学推导,得到含LambertW函数的操作过电压海拔修正公式,进一步提出操作过电压海拔修正与海拔具有接近线性的关系,并推导出操作过电压海拔修正的线性近似公式,简化计算过程。经过验证表明,简化的线性修正公式可以满足一般工程设计需要,为电力科学试验提供参考。

In the design of transmission line,the effect of altitude on the discharge voltage of switching overvoltage can not be ignored.Based on the current technical code,the specification,and the IEC calculating principle and formula,an altitude correction formula of switching overvoltage contains the LambertW function was deduced by mathematical reasoning.A proximate linear relationship between switching overvoltage and altitude was further proposed, and a linear proximate calculation formula of switching overvoltage which could simplify the calculating process was concluded.The simplified linear modifier formula can meet the needs of the engineering design and provide reference to the power scientific experiments.