How much do you know about photovoltaic power generation

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Working principle of photovoltaic power generation system:

The high-performance solar cell modules are centrally installed on the roof through the bracket, and after series and parallel, they form a solar cell array, which absorbs sunlight and generates direct current, which is converted into alternating current for home use after passing through the photovoltaic inverter and uploaded to the power grid.

Earnings measurement. Taking the three types of areas in Hunan as an example, the installation of a 5kw home power station will be based on the market **, with an investment of about 10,000 yuan (calculated according to the first-line big brands**). An average of 16kw h can be sent a day, and 5500kw h can be sent a year, according to 50% for self-use and 50% sold to the national grid

Subsidy income: 5,500 * yuan (after May 31, 2018, according to the national subsidy, excluding provincial and prefecture-level subsidies).

Electricity cost savings: 5500 * 50% * electricity bill) = 1617 yuan.

Income from electricity sales: 5500 * 50% * according to the local desulfurization coal electricity price) = yuan.

Taken together, the income of a year: 1760 + 1617 + yuan.

According to the calculation of the first phase of investment of 10,000 yuan, it will take almost 6 years to return to the cost, and the average operating time of the photovoltaic power station is 25 years, which is equal to the net income of the next 19 years.

National policy. Remarks: 2013 "Several Opinions on Promoting the Healthy Development of the Photovoltaic Industry".

The photovoltaic industry is a sunrise industry with great development potential, and it is also a strategic emerging industry with international competitive advantages in China. The state supports the construction of 100 demonstration zones for the large-scale application of distributed photovoltaic power generation. 1,000 photovoltaic power generation application demonstration towns and demonstration villages.

State Grid 2015 "Notice on the Further Implementation of Relevant Policies of Distributed Photovoltaic Power Generation by the National Energy Administration".

Units at all levels should actively do a good job in service work in terms of grid-connected access, electricity fee settlement, subsidy transfer, etc., and break the key constraints on the application of distributed photovoltaic power generation. Distributed photovoltaic power generation projects can be selected by the user to choose the mode of Internet access.

Three ministries and commissions 2015 "Opinions on Promoting the Application of Advanced Photovoltaic Technology Products and Industrial Upgrading".

The newly purchased photovoltaic modules of photovoltaic power generation projects shall meet the requirements of the relevant product technical indicators of the Ministry of Industry and Information Technology's "Standard Conditions for Photovoltaic Manufacturing Industry" (2015), of which the photoelectric conversion efficiency of polycrystalline silicon cell modules and monocrystalline silicon cell modules shall not be less than and 16% respectively.

Notice of the National Development and Reform Commission, the Ministry of Finance and the National Energy Administration on Matters Related to Photovoltaic Power Generation in 2018 Fagai Energy No. 2018 No. 823

Photovoltaic power generation is solar energy.

Photovoltaics: refers to a power generation system that converts light energy into electrical energy. Photovoltaic power generation is a technology that directly converts light energy into electrical energy by using the photogenerated volt effect at the semiconductor interface.

It is mainly composed of three parts: solar panels (components), controllers and inverters, and the main components are composed of electronic components.

Solar cells can be encapsulated and protected in series to form large-area solar cell modules, and then combined with power controllers and other components to form photovoltaic power generation devices. In response to global warming and the increasing depletion of fossil energy, the development and utilization of renewable energy has attracted increasing attention from the international community. The global installed capacity of photovoltaic power generation is growing rapidly.

Prospects for the PV industry:

1) Clean energy and carbon emission reduction actions have attracted much attention from photovoltaics. In order to achieve sustainable human development, clean and renewable energy is the current trend. Solar power generation has the advantages of pollution-free, sustainable, large amount, wide distribution, and diverse forms of utilization, which makes the entire photovoltaic industry increasingly concerned by various countries, and the development of the industry will obviously benefit from the adjustment of the world's overall energy structure and obtain the opportunity to accelerate development.

2) Strong support from industrial policies. In the "13th Five-Year Plan" for strategic emerging industries, electric power, solar energy and renewable energy, the state has proposed to vigorously develop distributed photovoltaic power stations; It is also proposed that by 2020, the installed capacity of distributed photovoltaic power stations will reach 60GW, which is 10 times the installed capacity at the end of the "Twelfth Five-Year Plan".

Photovoltaic power generation, referred to as photovoltaic power generation or PV power generation, refers to the process of using solar panels to convert light energy into electrical energy through the photoelectric effect, which is a pure auspicious plum species in new energy power. Its working principle is to use the photovoltaic effect, that is, the photons in the solar radiation are converted into electrons, generating voltage and current, so as to delay the conversion of energy. There are two main types of photovoltaic power generation:

The first is small-scale photovoltaic power generation, which is used in small households, rural infrastructure, field power supply, space satellites and other occasions; The second is large-scale photovoltaic power generation, which is mainly used in the large-scale Taiyan Oak Yang Power Station project for commercial power generation and grid-connected power supply. Photovoltaic power generation technology has become one of the important parts of the new energy field because of its convenience, environmental protection and safety.

Summary. Photovoltaic power generation is a technology that uses the photovoltaic effect to convert solar energy into electrical energy. Photovoltaic cells are electrical energy produced by the movement of charge carriers through a material.

When light hits the surface of a photovoltaic cell, the photons excite the electrons in the material, causing them to jump from valence to conduction and form "charge pairs", i.e., positive and negative charges. The generation of charge pairs causes a potential difference between the two ends of the battery, so that the electrical energy generated by the photovoltaic cell can be output by using an external circuit. Photovoltaic power generation is a kind of renewable energy, which has the advantages of low pollution and high reliability, so it is widely used in urban power supply, household solar power generation and other fields.

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Photovoltaic power generation is a technology that uses the photovoltaic effect to convert solar energy into electrical energy. Photovoltaic cells are electrical energy produced by the movement of charge carriers through a material. When light hits the surface of a photovoltaic cell, the photons excite the electrons in the material, causing them to jump from valence to conduction and form "charge pairs", i.e., positive and negative charges.

The generation of the charge bench rolling pair causes the potential difference between the two ends of the battery beam, so that Zaoqiaoyu can use the external circuit to output the electric energy generated by the photovoltaic cell. Photovoltaic power generation is a kind of renewable energy, which has the advantages of low pollution and high reliability, so it is widely used in urban power supply, household solar power generation and other fields.