Solar photovoltaic power generation, can it generate electricity in rainy days?

Photovoltaic power generation system can generate electricity in rainy days.

It's just that the power generation of the system is "discounted" compared with sunny days. At present, the average power generation we usually say refers to the power generation considering rainy weather, which has been taken into account in the business model of photovoltaic system.

Working principle of solar photovoltaic power generation;

Sunlight shines on the semiconductor pn junction, forming a new hole-electron pair. Under the action of the built-in electric field in the p-n junction, holes flow from the N region to the P region, and electrons flow from the P region to the N region, and a current is formed after the circuit is connected. This is the working principle of photoelectric effect solar cells.

There are two ways of solar power generation, one is light-heat-electricity conversion, and the other is direct photoelectric conversion.

1. The light-heat-electricity conversion mode uses the heat energy generated by solar radiation to generate electricity. Generally, the absorbed heat energy is converted into working medium steam by solar collectors, and then the steam turbine is driven to generate electricity. The former process is photothermal conversion process; The latter process is a thermoelectric conversion process, just like ordinary thermal power generation.

2. Photoelectric direct conversion mode This mode directly converts solar radiation energy into electric energy by photovoltaic effect, and the basic device of photoelectric conversion is solar cell. Solar cell is a device that directly converts solar energy into electric energy due to photovoltaic effect, and it is a semiconductor photodiode. When the sun shines on the photodiode, the photodiode will convert solar energy into electric energy and generate current.

Extended data:

How to make solar photovoltaic power generation generate electricity stably in rainy days;

1, reasonable women's wear.

Installation should not be arbitrary, and the installation process of the power station should face south, as the name implies, which can fully accept the sunshine. Theoretically, the installation angle is equal to or close to the local latitude, and the layout and spacing need to be combined with the local sunshine and the size of the roof structure.

2. Choose good equipment.

Here are the equipment parts, inverter and bracket.

For mainstream inverter manufacturers, the protection level is basically IP65, which is waterproof, but the long rainy weather has a great influence on the equipment. If the selected photovoltaic products cannot withstand rain for a long time, the power generation will not come up.

Baidu encyclopedia-solar photovoltaic power generation