Stability Analysis and Control of DC Distribution System with Electric Vehicles

The DC distribution network system equipped with a large number of power electronic equipment exhibits weak damping characteristics and is prone to low-frequency high-frequency unstable oscillations. current interpretation the oscillation mechanism has not been unified. Firstly, this paper established complete state-space model consisting electric vehicles, characteristic equation derived by establishing model, simplified reduced-order equations describing are obtained. Secondly, based on eigenvalue analysis, modes influence key parameters mode studied. Besides, impacts factors, such as connection topology dynamic loads, have discussed suppress oscillatory instability caused inappropriate design or interactions. Finally, using example system, through calculation time-domain simulation correctness aforementioned analysis verified.