The combination of solar energy and LED lighting has become a new green energy source

In today's world, major energy sources such as oil, coal, and natural gas are facing the danger of resource depletion. At the same time, environmental pressure is also increasing. Therefore, environmental protection and energy conservation have become the goals pursued by all walks of life around the world. Solar energy is a clean green energy source, and semiconductor light emitting diodes (LEDs) are also environmentally friendly, energy-saving, and efficient solid-state electric light sources.

In the past 100 years, lighting sources have gone through three important stages: incandescent lamps, fluorescent lamps, and HID lamps. Among them, incandescent lamps are the first generation of light sources, fluorescent lamps are the second generation of light sources, and high-intensity gas discharge lamps are the third generation of light sources (HID). Today, LED light sources, which have broad development prospects in the lighting industry, are called the fourth generation of light sources. As a novel semiconductor light source, LED has the characteristics of long life, high luminous efficiency, low power consumption, short start-up time, and firm structure.

1. The principle of solar photovoltaic power generation

Solar photovoltaic power generation relies on solar cell modules and uses the electronic properties of semiconductor materials. When sunlight shines on the semiconductor PN junction, the P-N junction barrier region generates a strong built-in electrostatic field, so the unbalanced electrons and holes generated in the barrier region or the unbalanced electrons and holes generated outside the barrier region but diffused into the barrier region, under the action of the built-in electrostatic field, move in opposite directions and leave the barrier region, resulting in the increase of the potential of the P region and the decrease of the potential of the N region, thereby generating voltage and current in the external circuit and converting light energy into electrical energy. Solar photovoltaic

power generation systems can be roughly divided into two categories. One is the grid-connected power generation system, which is connected to the public power grid through a standard interface, like a small power plant; the other is an independent power generation system, which forms a circuit inside its own closed-circuit system. The grid-connected power generation system converts the received solar radiation energy into high-voltage direct current through the photovoltaic array after high-frequency direct current conversion, and outputs a sinusoidal alternating current with the same frequency and phase as the grid voltage to the grid after inversion by the inverter. The photovoltaic array of the independent power generation system will first convert the received solar radiation energy directly into electrical energy to supply the load, and store the excess energy in the battery in the form of chemical energy after passing through the charging controller.

2. Advantages of

LED lighting In addition to the advantages of long service life, high luminous efficiency, small size, light weight, environmental protection, safety and reliability, LED semiconductor lighting sources have another significant advantage. Because the LED starting voltage and working voltage are consistent, no ballast is required. This saves costs and energy consumption while greatly shortening the response time of power on and off.

3. Combination of solar energy and LED lighting

The key to the perfect combination of solar photovoltaic power generation technology and LED lighting is that both are direct current, low voltage and can match each other. Therefore, the combination of the two does not require the direct current generated by solar cells to be converted into alternating current, thus greatly improving the efficiency of the entire lighting system. At the same time, with the help of grid-connected technology or the use of battery charging and discharging energy, its advantages are more obvious. With the in-depth research of related technologies, the luminous efficiency of LEDs is constantly improving, and ultra-high brightness LEDs will be available, which will inevitably replace ordinary lighting electric light sources and save a lot of energy without pollution.

Because the working current of LEDs is direct current and the working voltage is low. Solar cells convert light energy into DC power, and solar cell modules can be combined in series and parallel to obtain the actual required voltage. These characteristics are exactly matched with LEDs, and the combination of the two will achieve high energy utilization, high safety performance and reliability, and realize energy-saving, environmentally friendly, safe and efficient lighting systems, achieving a perfect combination.