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What are the characteristics of solar photovoltaic power generation?
- May 11, 2018 -

What are the characteristics of solar photovoltaic power generation? First of all, photovoltaic power generation is based on the photovoltaic effect principle, the use of solar cells to convert solar energy directly into electrical energy. Regardless of whether it is used independently or connected to the grid, the photovoltaic power generation system is mainly composed of solar panels (components), controllers, and inverters. They are mainly composed of electronic components but do not involve mechanical components.


Therefore, photovoltaic power generation equipment is extremely refined, reliable and stable, long life, easy installation and maintenance. In theory, photovoltaic technology can be used in any application where power is needed, from spacecraft, down to home power, up to megawatts of power stations, to toys, and photovoltaic power can be everywhere.


The composition and function of solar photovoltaic power generation system


The solar photovoltaic system consists of a solar battery, a solar controller, and a battery (group). If the output power is AC 220V or 110V, you also need to configure the inverter. The role of each part is:


1. Solar panels: Solar panels are the core part of solar power systems and the most valuable part of solar power systems. Its role is to convert the sun's radiant power into electrical energy, or send it to a storage battery, or push a load to work.


2. Solar controller: The role of the solar controller is to control the working status of the entire system and play the role of overcharge protection and over-discharge protection of the battery. In areas with large temperature differences, qualified controllers should also have temperature compensation. Other additional functions such as light control switch, time control switch should be optional controller;


3. Battery: Lead-acid batteries are generally used. NiMH batteries, nickel-cadmium batteries, or lithium batteries can also be used in small-scale micro-systems. Its role is to store the electric energy emitted by the solar panel when there is light, and release it when needed.


4. Inverter: The direct output of solar energy is generally 12VDC, 24VDC, 48VDC. In order to supply electric energy to 220VAC electric appliances, it is necessary to convert the DC electric energy generated by the solar power generation system into AC electric energy, and therefore it is necessary to use a DC-AC inverter.


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What are the characteristics of solar photovoltaic power generation?


1, no rotating parts, no noise;


2, no air pollution, no discharge of wastewater;


3, no combustion process, no fuel;


4, simple maintenance, low maintenance costs;


5, operating reliability, good stability;


6. As a key component, the solar battery has a long service life, and the lifetime of the crystalline silicon solar battery can reach 25 years or more;


7. It is easy to expand the scale of power generation as needed.

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The application of solar photovoltaic power generation system is very extensive. The basic forms of photovoltaic system applications can be divided into two categories: independent power generation systems and grid-connected power generation systems. The main areas of application are household power supply in space aircraft, communication systems, microwave relay stations, TV differential stations, photovoltaic pumps, and power- and power-scarcity areas.


With the development of technology and the need for sustainable development of the world economy, developed countries have begun to systematically promote urban photovoltaic grid-connected power generation, mainly by constructing household rooftop photovoltaic power generation systems and MW-level centralized large-scale grid-connected power generation systems, etc. The application of solar photovoltaic power generation system is strongly promoted in such aspects as transportation and urban lighting.