Some Information About Street Light Control System

Some Information About Street Light Control System

What the street light control system can provide
Controls for street lighting lower energy use and carbon dioxide emissions. By selectively dimming metropolitan areas, roadways, or specific lighting fixtures, over-lighting can be avoided. Thus, effective and long-lasting energy savings of up to 70% per year may be made with the ZGSM smart street lighting management system!

Street light control systems are becoming more and more popular as a result of technological advancements. On the assumption that we have a basic grasp of how street lights operate, we may implement features like automated street light on/off, dimming level adjustment, and street light data monitoring through the street light management system. The smart control system is the most potent street lamp control technology available. Using this, we can understand the functions below and learn how to operate the street lights.

Street light control refers to the remote switching and dimming of street lights for a whole project, a set of street lights, or a single street light. Under the conditions of guaranteeing basic lighting and attaining maximum energy saving, this conserves energy as much as is practical.
Situation control: To actualize unattended work, you can establish the working environment and the street light control method.
Data gathering: Gather and upload to the server the working record, which includes the operating voltage, current, total power consumed, and alert data. Analyze feedback data from street lamps statistically, produce statistics and alarm reports for maintenance, and promptly notify the appropriate maintenance staff of the alarm information.
 

Other: expanded probe for detecting urban environments, extended camera for monitoring traffic management, security, and road conditions, etc.

Energy conservation, according to Benwei, is the most crucial of these features. For your information, we are going to present a few more street light management systems here.

Control system for photocell switches
Conventional photocell switch
A photocell and a bimetallic relay make up a photocell switch. According to changes in light intensity, the device automatically turns on or off the street lighting.

The photosensitive resistance within the light control decreases in resistance when exposed to light. The street light is then switched off when the entire circuit has been closed.

The resistance value of the photosensitive resistance increases when the ambient light is inadequate. The street light is turned on at that point as well as the entire circuit.

Street lights' energy usage may be precisely and significantly decreased by employing a photocell switch. But, it has drawbacks of its own. For instance, sporadic lightning, auto irradiation, and other light sources might send the photocell sensor the incorrect signal, which will cause the bulb to switch off. Another factor that might cause the lamp to come on during the day is foliage or structures that block photocell switches.

Dimming control system for timing
Traditional dimming timing
The power of LED street lights may be altered at night thanks to this dimming feature.

Typically, an established program comes with the LED driver. As an illustration, we configured the LED driver to operate at 100% for six hours, 50% for the following six hours, and 100% again for the last two hours. The brightness of the light will be 100% from 18:00 to 24:00 and 50% from 24:00 to 6:00 when it is switched on at 18:00 and shut off at 6:00. Below is the illumination curve.

It will be at 100% brightness from 16:00 to 22:00, 50% brightness from 22:00 to 6:00, and 100% brightness from 6:00 to 7:00 when it is switched on at 16:00 and off at 7:00.

We believe you have already seen the drawbacks of the conventional time of street light fading. So we want appropriate light from 22:00 to 24:00, when there is still a lot of traffic. How can this problem be fixed? We have two possibilities from LED driver providers.

Dimming using self-adapting percentage time
If the setting is 100% holding for 50% of the time, and 50% holding for 50% of the time, the lighting curve will look like this.

When it is on at 18:00 and operational from that time till 6:00

18 to 24 hours of full brightness
50% illumination from 6:00 until 24:00
When switched on at 16:00, its operating hours are from 16:00 until 7:00.

from 16:00 to 23:30, the brightness is at 100%
50% illumination between 23:30 and 7:00
As you can see, the outcome (lighting curve) has much improved. There is a 30-minute time change.

Self-Adapting: Dimming at midnight
Self Adapting-Midnight, which is comparable to Osram's Astro dimming or Philips' autonomous dimming, is a virtual midnight dimming system. In the event that there is a discrepancy of less than 15 minutes, the LED driver will modify the dimming curve with midnight local time as the starting point.

The hours between 0:00 and 4:00, when there is less traffic on the road, are typically when the lights are at their dimmest. This can reduce energy use, which is healthy for the environment. The output of LED lights will start to fade virtually at midnight, starting at 2:00.

By this dimming curve, we can save up to 30% to 50% energy. So please contact us if you want to learn more about this. For example, the client wants to realize the dimming as below table.

Then the lighting curve(table below) will be as follows. 

Summary

Below is a table that includes the advantage and disadvantages of the different control systems.

When do the street lights come on? Combining the timed dimming (Self Adapting-Midnight) with photocell switch for street lights is possible. The photocell will thus automatically switch on the bulbs at sunset. The lighting curve of the street light will then follow the LED driver's program after this. As the sun rises, the photocell switch will then turn the street light off.