Frequency-adaptvie suppression strategy of double frequency voltage pulsation for multi-system locomotive

Frequency-adaptvie suppression strategy of double frequency voltage pulsation for multi-system locomotive

Blog Article

In order to realize the lightweight design and low-carbon operation of multi-system locomotive, an active suppression method of DC voltage secondary pulsation of reusable energy storage system was proposed.Bidirectional DC/DC circuit was used to transfer the secondary power pulsation in the four-quadrant converter to the auxiliary LC branch to suppress the intermediate SYNERGY B voltage pulsation.Firstly, the stability of DC voltage of auxiliary capacitor was guaranteed by PI control.

Then, the secondary pulsation power on the DC side was extracted and converted into the command current on the auxiliary LC branch.The command current was tracked by proportional-resonant control to realize compensation of secondary pulsation power.Finally, the control strategy was simulated to show significance of secondary pulsation voltage suppression and verify crossbow the feasibility of the theory.