Introduction of solar street lighting system

In today's world of energy shortages and increasing environmental pollution, the full development and utilization of solar energy is a strategic decision for the sustainable development of governments around the world. Solar street lights are more and more popular because they do not need special personnel to manage and control, install one-time investment without future electricity bills, do not need to set up transmission lines or dig trenches to lay cables, and can be easily installed in squares, campuses, parks, streets, etc.

Value.

Solar street lighting system is usually composed of solar cell components, storage batteries, light sources, controllers (AC light sources also need inverters) and other parts. This article from:

① light source selection; 

② control circuit;

③Determine the optimal inclination angle of the solar panel; 

④Determine the solar cell components and battery capacity and other aspects to optimize the design of the solar street lighting system operating in Zhuhai.

Solar street lights are different from ordinary street lights. They use solar cells as the only power source. Because the cost of solar cell components is still relatively high, in order to reduce system costs, efficient light sources must be used. LED is a semiconductor light-emitting device that can convert electrical energy into visible light. In recent years, LED technology has made a key breakthrough, and its performance-price ratio has also been greatly improved. Compared with traditional street light sources, LED light sources have high light efficiency. It is close to twice that of an incandescent lamp, and has a long life span, which can reach more than 105h. The traditional light source consumes a lot of power, and most of them work under high voltage. The use of a boost inverter link reduces energy utilization, and the LED uses low voltage DC power supply. It is safe and the cost of light source control is low, which makes it possible to adjust the light and dark and frequent switching.

Solar street light systems are generally small photovoltaic systems. The World Bank ’s standard is that the self-consumption current of small photovoltaic system controllers is less than 1% of the rated operating current. Therefore, the design of controller circuits and the selection of low-power devices are very important. The solar street lamp uses a voltage comparator composed of integrated op amps as the control circuit. This circuit is completely a control system composed of hardware. It is simple and reliable, easy to maintain, low in cost, and the power consumption of the circuit itself is extremely low. A circuit with good matching. The key of this circuit is to design a better voltage difference for the charge and discharge characteristics of the battery, and at the same time, the selection of the device must be reliable. In addition, the charge and discharge status indication circuit composed of light-emitting diodes becomes a control with practical functions. It has the function of preventing over-discharge and over-charge of the battery. The system uses a direct-coupling charge-discharge controller circuit. According to the matching characteristics of the LED and the battery, it can achieve power adaptation. During the months of insufficient solar radiation, the battery's charge state is usually low, so the battery is discharged. The time terminal voltage is also low, so that the load working current is small and the power is small, and the system can also work for a longer time. Conversely, when the sun is sufficiently irradiated, the working current of the load is large, the power is large, and it will be brighter.

1. The cost of solar street lights is generally higher than that of ordinary lamps, and the quality has also been greatly improved.

2. If all costs incurred in the construction process of the same scale are taken into account, the initial investment of solar street lamps is similar to that of ordinary lamps

3. The installation cost of common lamps varies according to the scale. The larger the scale, the higher the relevant costs. In contrast, the initial investment will be higher than that of solar lamps;

 compared with solar street lamps. To save a lot 

4. The transportation cost of ordinary lamps is significantly higher than that of solar street lamps. And it will increase according to the increase in transportation volume

5. In the process of using solar street lights, they are easily affected by the weather and the use environment.At present, this stability can be changed through technology and control methods.

6. Ordinary luminaires are in use. In terms of power consumption, it consumes more electricity. Even if the solar panel is not used in the same environment. Solar street lights, especially solar LED street lights are more energy-saving and have a longer life

7.Solar street lights are more independent in the process of operation, and it is easier to be controlled when the technology is more advanced.

8. Solar road can be used for power emergency. Use of standby power

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