Will distributed photovoltaic power generation be popularized in rural areas in the future?

There are two modes of grid connection of photovoltaic power generation system, centralized grid connection and distributed grid connection.

Integrated grid connection: the characteristic is that the generated energy is directly transported to the large power grid, and the power supply to the user is uniformly mobilized by the large power grid, and the power exchange between the large power grid is one-way. It is suitable for large-scale photovoltaic power stations to be connected to the grid, and it is usually far away from the load point, and the desert photovoltaic power station chooses this method to be connected to the grid.

Distributed grid-connected: also known as distributed photovoltaic power grid-connected, the characteristics are that the electric energy generated is directly distributed to the electricity load, and the surplus or insufficient power is adjusted by the joint large power grid, and the power exchange between the large power grid may be two-way. It is suitable for small-scale photovoltaic power generation system, and this method is selected for ordinary urban photovoltaic power generation system, which is unique in the photovoltaic system integrated with the building.

Generally, the capacity of a single distributed photovoltaic power generation system project is from a few kilowatts to several hundred kilowatts. The size of the capacity of the photovoltaic power generation system has little impact on the power generation efficiency, so the impact on its economy is also small, that is, the return on investment of a small photovoltaic power generation system is not lower than that of a large photovoltaic power plant.

Distributed photovoltaic power generation basically does not occupy land resources, can make full use of the surface of the building, can generate and supply power nearby, and does not use or less transmission lines, reducing the cost of transmission. Photovoltaic modules can also be a direct replacement for traditional wall and roof building materials.

The distributed photovoltaic power generation system is the coexistence of power generation and electricity consumption in the access to the distribution network, and the power generation in the peak period of the power supply of the power grid, can effectively play the role of flat peak, reduce the expensive peak power supply load of the city, and can alleviate the power shortage in local areas to a certain extent.

There are three grid-connected modes for distributed photovoltaic power generation projects:

1) All self-use: all the electricity generated by photovoltaic equipment is self-use, and it is not connected to the grid;

2) Self-generation and self-consumption, surplus electricity on the grid: part of the electricity generated by photovoltaic equipment is used for self-use, and the remaining electricity is connected to the grid;

3) Full grid: all the electricity generated by photovoltaic equipment is connected to the grid.

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1. All self-use, all the electricity generated by photovoltaic equipment is self-use, and it is not connected to the grid.

2. Spontaneous self-consumption, surplus electricity is connected to the grid, and part of the electricity of photovoltaic power generation is used for self-use, and the remaining part is connected to the grid.

3. All the electricity generated by photovoltaic equipment is connected to the grid.

Photovoltaic distributed generation is a new type of power generation and comprehensive utilization of energy with broad development prospects, which advocates the principle of nearby power generation, nearby grid connection, nearby conversion, and nearby use, which can not only effectively improve the power generation of photovoltaic power stations of the same scale, but also effectively solve the problem of power loss in voltage boosting and long-distance transportation. However, distributed generation also puts forward strict requirements on how to maximize solar power generation and how to ensure grid security, and the functionality and stability of photovoltaic inverters in this process are also extremely critical.

The country's solar power generation project is to install solar power generation equipment on the roof of your own home, and if you generate too much electricity, you can apply for integration into the national grid, sell the electricity to the state, and the state will pay to purchase the surplus electricity.

The State Grid Corporation of China is the largest power company in China, formerly known as the "State Power Corporation", which includes the national power grid and all power plants. After the reform of the power system in 2000, marked by the separation of power plants and grids, the power transmission and distribution and other power grid businesses spun off from the former State Power Corporation were operated by the State Grid Corporation, and the power plants were classified into five "power generation groups" (Datang, China Power Investment, Guodian, Huadian and Huaneng). In 2011, in accordance with the SASAC's "separation of main and auxiliary" plan, the State Grid Corporation and the provincial (regional) power grid enterprises of the State Grid Corporation and the China Southern Power Grid Corporation were stripped of the survey and design, thermal power construction, hydropower construction, repair enterprises and other auxiliary business units, and reorganized into two new companies with four first-class power design and construction enterprises.

Today, the State Grid and China Southern Power Grid in Hebei, Jilin, Shanghai, Fujian, Jiangxi and other 14 provinces, autonomous regions and municipalities of the company's auxiliary business units, China Water Resources and Hydropower Construction Group, China Hydropower Engineering Consulting Group reorganized into China Power Construction Group. State Grid and China Southern Power Grid in Beijing, Tianjin, Shanxi and other 15 provinces, autonomous regions and municipalities affiliated to the company's auxiliary business units, China Gezhouba Group, China Electric Power Engineering Consulting Group reorganized into China Energy Construction Group.

For most users who are optimistic about distributed generation, it is the most ideal mode to choose spontaneous self-consumption surplus electricity to go online, so that they can not only get a higher price for self-consumption of electricity, but also sell it to the grid when they cannot be used. However, there is a lot of resistance in the actual operation process, because of the asymmetry of information between photovoltaic practitioners and local power grid companies, and the lack of understanding of professional knowledge of each other, which is why the model change has become the most incomprehensible part of the photovoltaic electricity price policy and the new policy of the State Grid.

The cost of distributed photovoltaic power generation is low. There is no pollution. Versatile. It is an inevitable development trend in the future.

Distributed photovoltaic power generation project refers to a photovoltaic power generation project located near the customer's location, not for the purpose of large-scale long-distance power transmission, the electricity produced is mainly used by the customer for self-use and nearby utilization, and the excess power is sent to the local distribution network.

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