A power supply method and a charging device for a super capacitor energy storage type trolley car

Abstract

The invention discloses a power supply method and a charging device for a super capacitor energy storage type trolley car, the power supply is that when a tram with on-board supercapacitors arrives atthe station, The pantograph is powered from the DC / DC chopper to the on-board supercapacitor. DC energy is output to DC / DC chopper after AC / DC converter rectifies 380V three-phase AC input from powergrid, and DC energy is output to DC / DC chopper by ground supercapacitor. The vehicle-mounted supercapacitor is charged after pantograph is fully charged. The DC / DC chopper stops charging the vehicle-mounted supercapacitor when the vehicle-mounted supercapacitor is fully charged or when the tram leaves the station. The output switch of the DC / DC chopper is turned off and the pantograph is loweredback. The AC / DC converter switches to the ground supercapacitor to charge the ground supercapacitor so as to obtain the continuous replenishment of the pre-stored DC energy. The invention has the advantages of improving the survival rate of the trolley, reducing the capacity dependence on the power supply network and the impact on the power supply network, and reducing the construction and operation cost.

Description

technical field [0001] The invention relates to a power supply method and a charging device, in particular to a power supply method and a charging device for a supercapacitor energy storage type tram, and belongs to the technical field of charging. Background technique [0002] Modern trams play an important role in urban transportation, and are of great significance to the development of transportation and the alleviation of urban congestion. As a kind of medium-capacity rail transit, its one-way transport capacity is 8,000-15,000 people / hour (between BRT and light rail), the cost is about 100 million yuan / km, and it has a short construction period (only for subways) 1 / 5~1 / 3), using electricity as kinetic energy, running speed at about 30 km / h, small turning radius, strong climbing ability, low noise, and little impact on underground ground buildings. At the same time, compared with Conventional buses with small transport capacity have the advantages of large transport cap...

AI Technical Summary

Problems solved by technology

[0004] Trams powered by supercapacitor energy storage will be a new direction for future urban traffic development. Tram charging systems mainly use traditional multi-pulse rectification technology. Due to its inherent characteristics, the AC input voltage of the rectifier is distorted, and the current High harmonic content, large output voltage ripple and other problems, causing harmonic pollution to the power grid

Images