MODELING AND IDENTIFICATION OF NONLINEAR DYNAMIC LOADS IN POWER-SYSTEMS

This paper describes an approach for experimental determination of agg regate dynamic loads in power systems. The work is motivated by the im portance of accurate load modelling in voltage stability analysis. The models can be expressed in general as nonlinear differential equation s or equivalently realized in block diagram form as interconnections o f nonlinear (memoryless) functions and linear dynamic blocks. These co mponents are parameterised by load indexes and time constants. Experim ental results from tests In Southern Sweden on the identification of t hese parameters are described.