With ever increasing levels of EV penetration into the driving fleets of western countries, we are faced with many questions of mostly negative character. Where will we get the electrical energy from, what will happen with under-dimensioned distribution networks etc. But vehicle electrification can offer us positive things as well; it can ease the implementation of system services during generator trips. This is the problem that I am handling in my master's thesis; what can we gain by using EVs, connected to the system through smart charging stations with the ability to conduct power in two directions, as energy banks in cases of trips. Using virtual inertia algorithms we can replace the lack of physical rotor inertia, which we are faced with due to the increasing ratio of synchronous generator power in electrical grids. In this work I compare the frequency stability of different scenaria of charging EVs with the system experiencing the same disturbance to a baseline frequency response case with static loads and no virtual inertia response.
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