变结构与变参数电力系统短路故障的快速计算

HIGH SPEED CALCULATIONS OF SHORT CIRCUIT FOR POWER SYSTEMS WITH VARIABLE STRUCTURES AND PARAMETERS

本文提出了变结构与变参数电力系统短路故障口的各序等值电路参数和口电流的一种新的数字仿真计算模型。同时只需详细计算单相接地短路电流的电气量值,利用同序口电流比例系数,便可快速算出同一位置其它各型短路电气量值。本方法完全避免了各序网节点导纳或阻抗矩阵的修正计算与各型故障计算中的重复计算,具有通用、精确和快速计算的特点。

This paper presents a new method for digital simulation of equivalent circuit parameters and port currents of the short circuit fault port for each sequence networks in power systems with variable configuration and parameters. If the electric values for single-line-to-ground short ciruit are calculated in detail,the other faults at the same location can be rapidly obtained by using the proportional coefficients of the same sequence port current. In this method,the modifications of Z-bus or Y-bus matrices for each sequence network, and the repeated of calculations of the short circuit calculation have been completly avoided.