Real time parameter identification of composite load model

Real time accurate representation of electric load model is of great importance in power system simulation, control and stability studies. Composite load model made up of an induction motor in parallel with static load has been widely accepted as an appropriate structure for describing load behaviors, especially for the studies that deal with power system stability. Measurement-based composite load model is reviewed in this paper and a real time observer is proposed to estimate the load model parameters using the concept of multiple model estimation algorithm. Simulation results are provided for a composite load including IEEE type 6 motor to show the effectiveness of the proposed real time estimator. This paper is a step in the right direction toward developing accurate real time techniques for stability analysis.