基于综合法的含OPGW地线系统短路电流计算

Short-Circuit Current Calculation of Ground System with OPGW Based on Comprehensive Method

为了完成光纤复合架空地线(OPGW)的故障电流计算,并确保根据计算值选型的电力系统可靠和经济运行,要选择合适的计算方法。综合输电线路电磁环境、温度、湿度等自然环境和线路自身参数等因素,搭建了综合法计算模型。结合双回架空线路实例,用MATLAB编程仿真的方法对其进行分析计算,从计算速度和计算精度两方面进行评价,并验证综合法计算的可靠性和实际工程意义,为实际工程中采用合适的计算方法提供了一种新选择。

In order to calculate the fault current of an OPGW line ensuring that the selecting system based on the cal- culating result reliably and economically operates, it is necessary to choose a suitable calculation method. Considering some factors, such as electromagnetic fields of transmission lines, nature temperature and humidity environment, con- ductor parameters, ere, a comprehensive calculation model is put tbrward. The model is used in the calculating in- stance of a double-circuit overhead line adopting MATLAB and simulation method illustrating that the comprehensive calculation method is reliable, economic and suitable in both aspects of the calculation speed and accuracy in engi- neering application, and provide a new choose tbr the selection of appropriate methods in engineering.