摘要
本文借助一道《电力系统分析》中的典型例题,对两种常见的实用化短路计算方法进行了深入探讨。文中首先给出了两种实用短路计算方法的解题思路,一种直接利用电源支路电流进行计算,另一种则利用系统的转移阻抗来求解。文中进一步分析了两种方法计算结果差异产生的原因,研究表明,当系统中各电源性质接近时,两种解法差异较小。反之当同时考虑发电机和综合负荷的等效电势时(两者存在很大不同),将产生较大的差别,这是因为后一种方法忽略了电源之间的转移阻抗所造成的。该研究对于选择更合理的方法来求解短路电流具有一定的借鉴意义。
In this paper, two practical methods for fault current calculation in the course of power system analysis are deeply discussed using a simple system. Method 1 calculates the fault current by using the faulton current in the source circuit, while method 2 is based on the transfer impedances between the electrical source and the fault location. However, there is some difference between the results of these two methods. Based on our analysis, it is found that the dif{erence is caused by ignoring the transfer impedance between the electrical sources. It is concluded that the electrical sources are more similar, the difference is more smaller and vice versa. Studies in this paper are helpful to appropriately use the practical methods for fault current calculation in power system operation.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2006年第4期108-112,共5页
Proceedings of the CSU-EPSA
关键词
短路计算
冲击电流
实用化方法
fault calculation
impulse current
practical method
