A street light dimming system that directly uses power lines to transmit signals

Abstract

The invention discloses a street lamp dimming system directly using power lines to transmit signals. The street lamp sends a dimming control signal; wherein, the centralized street lamp controller includes a first power supply module, a power line signal sending module, a main control module, an electric meter module, a key module, a display module and a remote data communication module. By adopting the technical scheme of the present invention, a simple circuit structure is used to directly transmit the dimming control signal of the street lamp through the power line; at the same time, only one cycle of the AC signal of the power line is needed to realize the transmission of the dimming control signal, which greatly guarantees the power grid Stable; further, the dimming control signal at least retains a complete half-wave of a single cycle AC signal as energy supply, even if the conduction angle is very small, there will be no flickering phenomenon during the dimming process.

Description

technical field [0001] The invention belongs to the field of street lamp control, in particular to a street lamp dimming system which directly uses power lines to transmit signals. Background technique [0002] With the rapid development of LED technology, intelligent dimming has been widely used, especially in the field of street lighting. Street lamp dimming control can reasonably allocate road lighting and save energy. The street lamp dimming system in the prior art generally only provides power supply energy for the street lamp through the power line, but cannot directly transmit the control signal through the power line. Of course, the street lamp system in the prior art also adopts the power line carrier method to realize the transmission of data and energy through the power line at the same time, but the power line carrier method is to couple the high-frequency carrier signal with information on the power line, and each street lamp terminal passes through the carrier ...

AI Technical Summary

Problems solved by technology

[0003] In addition, traditional AC dimming usually controls the brightness of LED lamps by adjusting the dimming phase angle, that is, the conduction angle (conduction time) of the AC current within one cycle of dimming. The essence of this dimming method is to reduce the working power of LED lamps. To realize AC dimming, since the output power of the conduction angle is also used as the working voltage of the LED lamp, when the conduction angle is very small and the output power is not enough to maintain the normal operation of the LED lamp, the LED lamp will flicker. Therefore, this The dimming method is not suitable for dimming at low power

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