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created Oct 23rd, 04:13 by rajni shrivatri



436 words
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The use of solar panels is increasing, and state support is increasing. When consumers choose to install solar panels, we must understand the value and principle of solar panel power generation. Here, we will present it to you. What is the principle of solar panel power system? The sun shines at the semiconductor junction to form a new hole-electron pair. Under the action of the PN junction electric field, the hole flows from the N field to the P field, and the electron flows from the P field to the N field, and the current is formed after the circuit is turned on. This is the principle of solar panels with photoelectric effect.
First, solar power generation There are two methods of solar energy generation, one is light-heat-electric conversion method, and second is light-electric direct conversion method.
The light-heat-dynamic-electric conversion mode generates electricity using thermal energy generated by solar radiation. Typically, the solar collector collects the absorbed heat energy into the working medium vapor, and then drives the steam turbine to generate electricity. The former process is the light-to-heat conversion process; The latter process is the heat-to-dynamic conversion for the final conversion process, similar to ordinary thermal power generation. The disadvantage of solar thermal power generation is that the efficiency is very low and the cost is high, and its cost is minimal and it is 5 to 10 times more expensive than normal thermal power stations.
Light-to-electric direct conversion method This method uses the photoelectric effect to convert solar energy directly into electrical energy. The basic devices for photoelectric-electrical conversion are solar cells. The solar cell is a device that converts solar energy directly into electrical energy due to the photovoltaic effect. It is a semiconductor photodiode. When the sun shines on the photodiodes, the photodiodes convert solar energy into electrical energy. Present. When several batteries are connected in series or parallel, they can become a class of solar cells with relatively large output power. Solar cells are a new type of power source for development. They have the advantages of perpetuity, cleanliness and sensitivity. The long life of solar cells requires only the presence of the sun, and solar cells can be used for investment temporarily; Compared with thermal power generation. There will be no environmental pollution due to solar cells.
The photovoltaic power generation system is composed of solar cell arrays, battery packs, charge and discharge controllers, inverter, AC power distribution cabinet, sun tracking control system and other devices. Photovoltaic power generation systems are divided into independent photovoltaic power generation systems, grid-connected photovoltaic power generation systems, and split photovoltaic power generation systems.

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