Direct-current centralized power supply dimming system and method for public lighting

The invention relates to the technical field of electric power regulating and controlling equipment, in particular to a direct-current centralized power supply dimming system and method for public lighting. The system is characterized by being provided with an alternating-current input unit, an AC/DC conversion unit, a monitoring unit and a direct-current output unit. Compared with the prior art, the direct-current centralized power supply dimming system and method are particularly suitable for lighting in public places, energy consumption of a lighting system is reduced, the service life of a lamp is prolonged, daily maintenance cost of the lighting system is reduced, and power distribution three-phase load balance of the lighting system can be achieved.