Shenhui technology

Sub photovoltaic system

Principle of distributed photovoltaic power generation system

Distributed photovoltaic power generation system, also known as distributed power generation or distributed energy supply, refers to the configuration of small photovoltaic power generation power supply system at or near the user site to meet the needs of specific users, support the economic operation of the existing distribution network, or meet the requirements of these two aspects at the same time.

The basic equipment of distributed photovoltaic power generation system includes photovoltaic cell module, photovoltaic array support, DC combiner box, DC distribution cabinet, grid connected inverter, AC distribution cabinet and other equipment, as well as power supply system monitoring device and environmental monitoring device. Its operation mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the solar energy into the output electric energy and sends it to the DC distribution cabinet through the DC combiner box. The grid connected inverter inverts the transaction current to supply the building's own load, and the excess or insufficient power passes through

Characteristics of photovoltaic power generation

1. No radiation, no noise.

2. Without manual control, the system operates independently, and the intelligent background monitoring can master the system operation status and power generation data.

3. The performance is stable and the service life of the product is up to 30 years.

4. Green energy, national support, the general trend.

5. Save electricity, and the electricity generated during the day shall be preferentially supplied to their own loads.

Benefits of Installing Photovoltaic Power Generation

1. The roof belongs to the idle resources of the enterprise, and the idle assets can be revitalized after the installation of photovoltaic power generation.

2. Heat insulation and cooling. After photovoltaic power generation is installed on the roof, the temperature of the top layer can be reduced by about 5 degrees, and the effect is better than that of the shed with colored steel tiles.

3. Energy conservation and emission reduction. By building their own power stations, we can avoid peak power consumption and power restriction.

4. The income is stable. There are mainly two parts of income from the installation of photovoltaic power generation. The first is the electricity cost saved by yourself. The electricity generated by photovoltaic during the day will be preferentially supplied to the load, and can drive the load of any power like the municipal power. The second is that the excess electricity can be sold to the power grid company, In Dongguan, China Southern Power Grid purchased the power generated by enterprise photovoltaic at 0.45 (before tax) and 0.396 (after tax) kwh. After grid connection, it has been profitable for 30 consecutive years.

5. High income. The annual rate of return of industrial and commercial photovoltaic power stations reaches more than 18%, the roof is high-quality, and the high rate of return of electricity in the daytime can reach more than 25%, which can be repaid in 4 years.

Two grid connection modes

1. Full access to the Internet: generally, this scheme will be selected where there is no load to absorb power, such as power stations installed in deserts, lakes, mountains and other places

2. Spontaneous self use surplus power on the Internet: it is applicable to the situation of load power consumption, such as families, factories, office buildings, farms, etc