应用运算曲线求取短路电流时电源计算电抗的通用算法

Common Algorithm for Computing Power Source Calculating Reactance in Applying Operational Curve to Solve Fault Current

运算曲线是求解任意时刻短路电流的有效工具。查运算曲线首先要算出每个电源对短路点的计算电抗。然而 ,目前对复杂网络中电源计算电抗的计算模型及方法的研究尚存不足 ,没有提出普遍适用的计算公式 ,更没有给出适合计算机算法的数学模型。应用基本电工理论和方法 ,详细分析了短路网络中的各种电源情况 ,并经严密的理论推导 ,给出了复杂网络中有限及无限大功率电源对短路点计算电抗的系列计算公式。这些公式简单、明了、通用性强 ,便于计算机计算 ,为实现短路电流运算曲线算法的计算机化提供了模型和方法 。

Operational curve is an effective tool used to calculate fault current at anytime.The calculating reactance between power source node and fault node must be computed first before checking operational curve.But the study on the method and model for computing power source calculating reactance of complex network is not enough.Neither the general formula nor the mathematics model suitable for computer has been put forward.Applying basic electric theory and method it analyses in detail the various power source situation in fault network and gives out a series of formulas through strict theoretical inference,with which the calculating reactance between finite or infinite power source node and fault node can be computed.These formulas are simple,clear,strong in general use and convenient for computer.This will provides the model and algorithm for the computerization of operational curve method to solve fault current.Thus it has practical significance and high application value.