Modelling and identification of nonlinear dynamic loads in power systems

This paper describes an approach for experimental determination of aggregate dynamic loads in power systems. The work is motivated by the importance of accurate load modelling in voltage stability analysis. The models can be expressed in general as nonlinear differential equations or equivalently realised in block diagram form as interconnections of nonlinear (memoryless) functions and linear dynamic blocks. These components are parameterised by load indexes and time constants. Experimental results from tests in Southern Sweden on the identification of these parameters are described