Solar PV Plant
    Solar energy is one of the major energy sources in the world. Solar energy is the most primitive energy source, and almost all other energy sources on earth come directly or indirectly from solar energy. Solar energy has the advantages of abundant resources, longevity, wide distribution, safety, cleanliness, and technical reliability. Since the sun's energy can be converted into many other forms of energy, it has a wide range of applications.
    There are two main methods of solar power generation. One is to convert solar energy into thermal energy. Electricity is then generated in a conventional manner, known as solar thermal power. The other is to directly convert solar energy into electrical energy through photovoltaic devices using the principle of photovoltaics, which is called solar photovoltaic power generation.
    The solar photovoltaic power generation system is a power generation system that directly converts solar radiation energy into electrical energy using solar cells made on the principle of photovoltaic effect. During the day, after the photovoltaic cell module receives sunlight, electron-hole pairs with opposite polarities (ie,     photogenerated carriers) are generated in the semiconductor. These carriers are separated by the electrostatic field generated by the semiconductor PN junction, and are separated by the photovoltaic cell The positive and negative electrodes are collected. At the same time, current is generated in the external circuit to obtain electrical       energy. Part of this power is supplied to DC or AC loads, and the other part of the excess power can be used to charge the battery pack through the anti-reverse charging diode. At night or on rainy days. When the photovoltaic cell module cannot work, the battery pack supplies DC or AC load to work.
    System composition: The solar photovoltaic power generation system is mainly composed of photovoltaic cell components, photovoltaic system battery controller, storage battery and AC/DC inverter, and the core component is photovoltaic cell components.
Photovoltaic cell module: converts the sun's light energy into electricity.
    AC/DC Inverter: A device used to convert direct current to alternating current. In addition, the inverter also has an automatic voltage regulation function, which can improve the power supply quality of the photovoltaic power generation system.
Storage battery: used to store the electricity converted from photovoltaic cells and release it for use at any time as needed.
    Charge and discharge controller: It is a device that automatically prevents the overcharge and overdischarge of the energy storage battery pack of the solar photovoltaic power system. It is one of the core components of the photovoltaic power generation system.
The advantages of photovoltaic power generation are reflected in the following aspects:
    (1) Solar energy resources are inexhaustible and inexhaustible. The amount of solar energy hitting the earth is 6,000 times greater than the energy consumed by humans.
    (2) Green and environmental protection. Photovoltaic power generation itself does not require fuel, no carbon dioxide emissions, no air pollution, and no noise.
    (3) Wide range of applications. Photovoltaic systems can be used wherever there is light.
    (4) Long service life, simple maintenance and high reliability. Crystalline silicon solar cells have a lifespan of 20-35 years; since there are no mechanical rotating parts, operation Simple maintenance, high reliability, and the use of automatic control technology, basically no manual operation.
    (5) The solar cell module has a simple structure, small size and light weight, which is convenient for transportation and installation, and the construction period of the photovoltaic power generation system is short.
    (6) The system combination is easy. Several solar cell components and battery cells are combined to form the solar cell array and battery pack of the system; inverters and controllers can also be integrated. Therefore, the photovoltaic power generation system can be large or small, and it is easy to combine and expand.

    The traditional fuel energy is decreasing day by day, and the energy problem has become a global problem that cannot be ignored. Finding new energy has become a top priority. Soon people will focus on the renewable energy around them, such as wind energy, solar energy, geothermal, biomass power generation... These new energy sources have become new targets to replace traditional one-time energy sources. The daily abundant solar radiation energy is inexhaustible, non-polluting and cheap. It is an energy that can be freely used by human beings, and it has become the best choice to be brought into people's vision first. The energy of solar energy reaching the ground every second is as high as 800,000 kilowatts. If 0.1% of the solar energy on the earth's surface is converted into electricity, the conversion rate is 5%, and the annual power generation can reach 5.6 × 10.12 million kilowatt-hours.