Predicting, controlling and damping inter-area mode oscillations in Power Systems including Wind Parks

This paper shows a simple approach to predicting, controlling and damping inter-area mode oscillations. In the case of a stable operating point with a poorly damped oscillatory mode, the objective is to increase the damping of that mode. That is, the power system linearization at the operating point is modified. Operator actions such as redispatch, varying load, varying reactive power (voltage) often modify the operating point to do this; the effect of this is that transients near enough to the operating point will decay more quickly. However, the analysis does not attempt the more difficult study of large signal transients. The existence of a stable operating point is of course necessary for system security, but there is no guarantee that large signal transients will result in operation at that operating point. On the other hand, after carrying out some simulations, a methodology is built to predict eigenvalues. Key-Words: Linearization, critical mode, eigenvalues, Wind Power Converter, damping, inter-area oscillations