Evaluating frequency stability with consideration of load type in different share of renewables and emulated inertia in case of system split

Nowadays, with increasing the share of renewable generation units, a modern power system encounters stability challenges due to the shrunken inertia. Yet the majority of installed wind turbines as an alternative for synchronous generator do not perform a similar role regarding inertia provision and grid support, which sets a limit for higher penetration of them into a power system. As a solution, new control for converter-based generation units is introduced, enabling them to be a grid supporting voltage control system, which reacts seamlessly to the variation of the grid parameters. Hence, this paper aims to evaluate the required minimum amount of inertia to keep stability after a system split. To this aim, a comparison will be drawn between the synchronous generator and these grid-supporting voltage control power sources in combination with the installed capacity of grid feeding wind turbines. Besides, the tests will be done in the presence of different type of loads, as the effect of converter-fed loads is worth investigating in the evaluation of the border for the share of renewables.