What is the principle of distributed photovoltaic power generation? What are the advantages of distributed photovoltaic power generation?

What is the principle of distributed photovoltaic power generation?

Solar energy is a kind of radiant energy, which must be converted into electrical energy with the help of an energy conversion device. This energy conversion device that converts radiant energy into electrical energy is a solar cell.

Distributed photovoltaic power generation is a device that uses the principle of photoelectric conversion to convert the sun's radiant light into electrical energy through semiconductor materials. The specific principle process:

The unique electrical characteristics of photovoltaic cells are based on the doping of certain elements (such as phosphorus or boron) in crystalline silicon, thereby causing a permanent imbalance in the molecular charges of the material, forming a semiconductor material with special electrical properties. Free charges can be generated in semiconductors with special electrical properties under irradiation, and these free charges move and accumulate in a directional manner, thereby generating electric energy when their two ends are closed. This phenomenon is called "photovoltaic effect" or photovoltaic effect for short.

2. What are the advantages of distributed photovoltaic power generation?

1> The output power is relatively small

Generally speaking, the capacity of a distributed photovoltaic power generation project is within several thousand watts. Unlike centralized power plants, the size of photovoltaic power plants has little impact on power generation efficiency, so it has little impact on its economy. The return on investment of small photovoltaic systems will not be lower than that of large ones.

2> Small pollution and outstanding environmental benefits

During the power generation process of distributed photovoltaic power generation projects, there is no noise and no pollution to air and water.

3> It can alleviate the local electrical tension to a certain extent

However, the energy density of distributed photovoltaic power generation is relatively low. The power of distributed photovoltaic power generation system per square meter is only about 100 watts. In addition, the roof area of buildings suitable for installing photovoltaic modules is limited, which cannot fundamentally solve the problem of power shortage. 

4> Power generation and consumption can coexist

The power generation of large-scale ground power stations is boosted and connected to the transmission network, and it only operates as a power generation station; while distributed photovoltaic power generation is connected to the distribution network, and the generation and consumption of electricity coexist, and it is required to consume as much as possible on the spot.