架空导线短时过负荷能力理论及试验研究

The Theoretical and Experimental Study of Short-Time Overload Capacity of Overhead Conductors

提出一种架空导线短时过负荷计算模型,并通过试验对计算模型进行验证,结果表明理论计算值与实测值相差不多。架空导线负荷的变化和温度的上升存在滞后效应,因此在不超过导线允许温度范围内,可进行架空导线的短时过负荷运行。短时运行的过负荷量和时间可由计算模型给出,由此为架空导线短时过负荷运行控制提供决策依据。

The mathematical model of short-time overload about overhead conductors is presented,and this model was proved by test. The results showed that the calculated values and measured values are very similar. There is a lag effect between the load change and the temperature rising of the overhead conductors,the overhead conductors can run at short-time overload in the allowable temperature range. The overload volume and time can be given by the mathematical model and provide a basis for decision in short-time overload operation of the overhead conductors.