Abstract
As load characteristics have a significant effect on system performance such as transient stability and voltage stability, appropriate of load characteristics improves system operation properly. Because of the uncertainty of the actual load characteristics, many field tests have been conducted and the load model parameters have been calculated all over the world. However, recent load model parameters are not well known.
In this paper, the parameters of the load models (general load model for active power and proposed load model for reactive power) are calculated with non-linear least-square method. The field data are obtained with the automatic measuring devices triggered by frequency deviation from 1992 to 1999 in western Japan 60 Hz system and Okinawa system. Accordingly the load model parameters are correlated closely with the constitution of electric power apparatus.
