The combination of solar and LED lighting prospects

In today's world, the main energy of petroleum, coal and natural gas is in danger of depletion of resources and environmental pressures are increasing, therefore, environmental protection, energy saving has become the pursuit of the goal of all walks of life in the world. Solar energy is a kind of clean green energy, the semiconductor light emitting diode (LED) is also a kind of environmental protection, energy saving and high efficiency solid state light source.

In the past more than and 100 years, the lighting source has gone through three important stages: incandescent lamp, fluorescent lamp, HID lamp. Incandescent lamp is the first generation of light source, fluorescent lamp is the second generation light source, high intensity discharge lamp is the third generation light source (HID). Now in the lighting industry has broad prospects for development of LED light source is known as the fourth generation light source. As a novel semiconductor light source, LED has many advantages such as long life, high luminous efficiency, low power consumption, short start-up time and firm structure.

1 solar photovoltaic power generation principle

Solar photovoltaic power generation by solar cell components, the electronic properties of semiconductor materials, when the sun light in the semiconductor pn junction, the P N junction barrier region has a strong built-in electrostatic field, which produces nonequilibrium electrons and holes in the barrier region or in barrier zones but nonequilibrium electron diffusion and the hole into the barrier region, built-in electrostatic field, each in the opposite direction, leaving the barrier region, the P potential increased. N potential decreased, resulting in voltage and current in the external circuit, convert light into electrical energy. Solar photovoltaic power generation system can be divided into two categories, one is grid power system, and is connected to the utility grid through a standard interface, like a small power plant; the other is the independent power generation system, which is in the closed circuit formed their own internal system. Photovoltaic grid connected power system through array solar radiation energy received by a high frequency high voltage DC DC converter, after after inverter output to power grid and grid voltage with sinusoidal alternating current frequency and phase. Independent power generation system photovoltaic array will first receive the direct solar radiation energy into electrical energy is supplied to the load, and the excess energy through the charge controller to chemical energy stored in the battery.

Advantages of 2.LED lighting

LED semiconductor light source has the advantages of long service life, high luminous efficiency, small volume, light weight, environmental protection and safe and reliable, there is also a significant advantage is due to LED starting voltage and working voltage, so there is no need to use ballast. This saves cost and energy consumption, but also greatly reduces the response time of power failure.

3 the combination of solar energy and LED lighting

Solar photovoltaic power generation technology and the perfect combination of LED lighting is the key to both the same DC, low voltage and can match each other. Therefore, the combination of the two does not need to convert the direct current generated by the solar cell into alternating current, thus greatly improving the efficiency of the whole lighting system. At the same time, with the help of grid technology or battery charging and discharging energy, its advantages are more obvious. With the in-depth study of the related technologies, the luminous efficiency of LED is increasing, and the ultra high brightness LED will come out, it is bound to replace the ordinary lighting electric light source, and a lot of energy saving and pollution-free.

Because the working current of LED is DC, 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 desired voltage. These features exactly matched with LED, which will be combined with high energy utilization rate, high safety and reliability, realize the lighting system energy saving and environmental protection, safe and efficient, to achieve the perfect combination of.

Source: LED China advertising lighting network