电力系统短路电流计算的算法设计与研究

Design and Study on the Arithmetic of Short Circuit Current Calculation in Power Systems

根据酒钢集团公司发电厂和电网的实际需要,开发了一套短路电流计算软件。详细介绍了各序节点导纳矩阵的形成、考虑各种运行方式及短路信息下节点导纳矩阵的修正,应用连续回代法求取各序节点阻抗矩阵的方法,以及变结构电网的处理方法。最后给出了实际算例,证明了本论文提出方法的正确性。

To meet the practical need of Jiuquan Steel’s self-supply power plant, a calculation software for short circuit current was developed. This paper mainly demonstrates the calculation of short circuit current system, introduces in detail the formation of node admit-tance matrix of each sequence with consideration to the changes under different operation modes and short circuit information, the method of obtaining node impedance matrix for each sequence by applying continuous substitution and the treatment methods for variable structure power networks. Finally, an example of calculation was provided to show the validity of the method.