继电保护整定计算中故障计算模型的选择与比较分析

计及运行方式变化的故障计算的快速实现是提高继电保护整定计算工作效率的关键。根据整定计算中故障计算的特点,基于节点阻抗矩阵,提出了计及运行方式变化的大批量故障快速计算的实现方法,通过涉及节点集的合理选取和阻抗矩阵的分级存贮,实现阻抗矩阵的最小修改,从而达到故障计算的快速及实用性要求。并从时间复杂度的角度分析和比较了基于节点导纳矩阵和节点阻抗矩阵的故障计算在整定计算中应用的差异。

Research and realization of fast fault calculation method in relay setting

In order to enhance the efficiency of relay coordination, fast calculation of faults in various operating modes of power network is a pivotal factor. This paper analyses the characteristics of relay coordination, presents a method based on impedance matrix to calculate a mass of faults considering the changes of operating modes of power network. By means of the rational selection of involved node muster and classified stockpile impedance matrix, the least modification impedance matrix and fast fault calculation are achieved. From the view of time-consuming, this paper analyses and compares the advantages and shortcomings of fault calculation method based on conductance matrix with that based on impedance matrix.