国内外常用短路电流计算标准和方法的比较研究

Comparison and research on the commonly used standards and methods of short-circuit current calculation

简要介绍运算曲线法、IEC标准和ANSI标准的短路电流计算方法,并在概念、算法以及初始条件设置等方面比较了三种计算方法的区别。通过算例,绘制不同计算电抗下三种计算方法的短路电流曲线,比较曲线间差异,分析了算法和初始条件设置等方面对计算结果的影响,找出各标准计算结果差异的规律性,为短路电流计算标准的选择提出参考性意见。

In this paper,the commonly used standards or methods for short-circuit current calculation are discussed in detail,including Operational Curves,IEC Standard and ANSI Standard.And then,the difference between IEC Standard,ANSI Standard,and Operational Curves are compared regarding concepts,algorithms,initial conditions,etc.Finally,using an example,the causes of the result differences are found out by drawing short-circuit current curves of the three methods with different calculation reactance and some suggestions for the choice of short-circuit current standards are made.