Evaluating the possibilities of inverter-based technologies to ensure system dynamic stability

Modern power systems have seen increased integration on converter-based electricity production units, mostly photovoltaics and wind. Main consequence of converter-connected generation is decrease of synchronous grid inertia. The inertia of the rotating masses helps to minimize the frequency drift in case of power variation, however if the grid is mostly dominated by power electronic converters, this inertial effect can be severely weakened. Some additional or modified control loops can be added to the converter to emulate the primary and secondary frequency control of standard synchronous machines, thus introducing virtual inertia to the system. Possibilities of such technologies will be explored in this paper.