Power System Stability Improvement by Employing Strong Action Controller Acting as Virtual Inertia Controller

Abstract

In the near future, an expected shortage of fossil fuel supplies for conventional generating units has become mandatory. At the same time, there is a high level of penetration of renewable energy sources for these conventional power grids, especially using wind energy turbines. Generally, renewable energy sources have the most important technical disadvantage which is low inertia constant. This results in relatively oscillations at any slight change in any of the power system states. This means a weakly stable system. Virtual inertial controllers can help solve this problem but are they efficient enough. In this paper, a question will be asked: is it possible for conventional controllers to play the same role as virtual inertial controllers. The use of strong action controllers to play the same role of virtual inertia controllers will be proposed. Required analysis and sufficient simulations are driven to answer these questions. The answer shows the effectiveness of strong action controllers to compensate the role of virtual inertia controllers.