电力系统不对称短路电流计算程序研究

Study on the program of asymmetrical short-circuit current calculation in power system

通过MATLAB编制了电力系统短路电流计算的程序,为了提高计算的精确度,涉及的系统元件不仅考虑了电抗,而且考虑了电阻。基于对称分量法,针对不同的短路故障类型,形成相应的复合序网,求出所需的短路电流。针对IEEE-5和IEEE-14节点的算例分析,分别使用人工手算法和计算机算法对于同一节点发生短路时求解不同情况下的短路电流,对比分析表明计算机算法得到的结果是有效的,准确的。

This paper compiled the program of short-circuit current calculation in power system based on the MATLAB. In order to im- prove the accuracy of the calculation, involving system components considered not only the reactance but also the resistance. Based on symmetrical component method, in view of the different short-circuit fault types, formed the corresponding composite sequence net- work, and found out the short circuit current. According to the IEEE-5 and IEEE-14 nodes example analysis, solved short-circuit cur- rent by using artificial algorithm and computer algorithm for the same node when short circuit occurs under different conditions. Contrast analysis showed that the result of computer algorithm is effective and accurate.