Research on Load Models Effect on Stability of Voltage of DC End Power System

Abstract

Load characteristic is one of the vital factors that effect the stability of voltage of power system. As the most important dynamic load in power system, induction motor is one of the most direct reasons which resulting in instability of voltage. In simulated analysis, the establishment of load model, choice of parameter as well as ratio distribution of different kinds of load will lay considerable influence on the stability of system. This thesis establishes the load model of induction motor in stable and transient state and simulates on the basis of Shandong power grid. As the simulating result shows, load ratio of induction motor has fundamental effect on the voltage stability of Shandong power grid. As the load ratio of induction motor increases, the stability of voltage of Shandong power grid decrease and the voltage may even break down.