Simulation-based study of novel control strategies for inverters in low-inertia system: grid-forming and grid-followings

The transition towards a 100% converter-based grid has as consequence the constant reduction of the mechanical inertia. Two different kind of devices will be taken into consideration, grid-following and grid-forming devices; the first ones are based on the presence of the PLL to detect the frequency of the grid, while the others have not this element. The goal of the thesis is to analyse the behaviour of the network with an increasing percentage of converters in the grid.