Improving the supply voltage and control of the urban road lighting system

摘要

The knot appliance of the urban road lighting system contains great potential. In addition to select efficient lighting luminaire, it even must carry out half night light. In other words, it is to impose lower voltage on the lighting luminaire properly at midnight, thus to attain the purpose of the electricity of knot. Currently the domestic and international electromagnetism type lighting system of knot electric apparatus basically adopts automatic coupling transformer, compensatory transformer or reactors as main element, adopting the system software implementation to control its regulation voltage and luminances of separate time, thus to carry out the electricity of knot.According to the electricity parameters and the life characteristic of street lamp, a best supply voltage of urban road lighting systems is deduced: a rated voltage is 220V in the first half of the night, and the best voltage is 200V in the later half of the night. It constitutes the V/V0 transformer lighting knot electricity system. The system does not need additional facilities and complicated control devices, such as automatic coupling transformer, compensatory transformer or reactors, etc. We need only to change the street lamp transformer V/V0 wiring(We adopt the V/V0 street lamp definite purpose transformer or hang in the air one of the phrases of the Y/Y0 transformer). Then the electronic controller will automatically cut off the secondary neutral line of the transformer in the midnight, changing the V/V0 wiring into the V/V wiring. And the voltage of the lighting luminaire will be automatically reduced to a half of the line voltage from the phase voltage.