Effects of dynamic load model parameters on damping of oscillations in power systems

The paper discusses the effects that nonlinear dynamic load model parameters have on electromechanical oscillations in power systems. Based on a modified Heffron-Phillips model of a synchronous machine and on a generic model of dynamic loads, analysis shows the dependence of the modal oscillations of the system on load model parameters. A single-machine infinite-bus case has been analyzed. It was found that under some circumstances damping can be improved, but under other conditions dynamic load may cause a decrease in damping.