一种超高压输电线路动态增容方法

A method of dynamic rating of ultra high voltage transmission line

为充分挖掘超高压线路的输电潜能,在保持现有输电线路不变,同时保证线路安全运行的前提之下,提出了一种融合静态提温增容和动态监测增容的综合方法。对计算导体载流量的摩尔根公式进行了修正,并通过计算导线弧垂来验证综合增容后的安全性。以Visual C#为平台开发了输电线路动态增容分析软件,并通过实例分析了不同情况下增容方法对导体载流量的影响。算例分析的结果表明,动态增容方法比静态增容方法的增容空间大,而将二者结合起来的增容效果更为明显。

To fully exploit the potential capacity of EHV transmission lines, an integrated rating approach which combines the static temperature raising method and dynamic monitoring method is proposed which can keep secure operation without changing existing transmission line facilities. The Morgan ampacity formula is revised, and the security of dynamic rating is verified by calculating the sag of transmission line. A dynamic rating tool is developed based on Visual C＋＋. The impact of dynamic rating method upon line ampacity is illustrated by numerical examples in different scenarios. The results demonstrate that dynamic rating of power transmission lines can usually provide a significant increase of transmission capacity compared to the static rating method, and the effect is more obvious when combining the two methods.