What are the application forms of distributed photovoltaic power generation?

Distributed photovoltaic power generation refers to photovoltaic power generation facilities that are built near the user's site, and the operation mode is mainly self-generated and self-used on the user side, and the excess electricity is connected to the grid and is characterized by balance regulation in the distribution system.

Distributed photovoltaic power generation includes grid-connected distributed photovoltaic power generation, off-grid distributed photovoltaic power generation and multi-energy complementary microgrid. Grid-connected distributed generation is mostly used near the user, generally running in parallel with the medium and low voltage distribution network, self-consumption, unable to generate electricity or insufficient power from the Internet to purchase electricity, and sell electricity to the Internet when the power is redundant; Off-grid distributed photovoltaic power generation is mostly used in remote areas and island areas in China, which is not connected to the large power grid, and uses its own power generation system and energy storage system to directly supply power to the load; The distributed photovoltaic system can also be combined with other power generation methods to form a multi-energy complementary micro-power system, such as water, light, wind and storage complementary power generation system, etc., which can be operated independently as a microgrid or integrated into the grid network. For the construction of large-scale photovoltaic systems on the ground in the western region, supplying power to specific users and balancing the load through the public grid, it can also be regarded as a kind of distributed photovoltaic power generation in a generalized sense. Shanghai Yisou Energy.

In fact, there are a wide range of applications, such as relying on a small photovoltaic module to provide power for surveillance cameras, and if you make a photovoltaic carport, you can also provide charging for battery cars or electric vehicles.

From the household aspect, the installation of photovoltaic power station + energy storage equipment can achieve off-grid electricity and complete self-consumption, but the cost of energy storage equipment is still relatively high and not particularly cost-effective.

There is also a kind of grid-connected power generation, that is, spontaneous self-consumption, surplus electricity on the grid, the inexhaustible electricity is sold to the State Grid, this form is not only a supplement to their own household electricity, but also a relatively stable form of investment.

Specifically, you can learn about the photovoltaic loan services of Tianhe Fujia or Zhejiang Carbon Silver Photovoltaic.

It is divided into distributed and centralized, and the current state strongly supports distribution.

Economic Benefits:In terms of users, the economic energy saving of distributed photovoltaic power generation is mainly reflected in self-consumption, and the excess electric energy can be sold to the power supply company through the national grid, so as to greatly save electricity costs and get subsidies (national, provincial and municipal subsidies).

Thermal insulation and cooling:Users can install distributed generation equipment to insulate and cool down by 3-6 degrees in summer, and reduce heat transfer in winter.

Green and environmentally friendly:In the process of power generation, there is no noise, no light pollution, no radiation, and it is a static power generation with zero emission and zero pollution in the real sense

Aesthetic personality:The perfect combination of architecture or aesthetics and photovoltaic technology makes the whole roof look beautiful, strong sense of technology and enhances the value of the property itself.

Superiority:Distributed photovoltaic power generation can alleviate the power shortage in local areas to a certain extent; To make up for the lack of stability of the large power grid, and continue to supply power in the event of an accident has become an indispensable and important supplement to centralized power supply.

(1) The output power is relatively small.

Generally speaking, the capacity of a distributed photovoltaic power generation project is within a few kilowatts. Unlike centralized power plants, the size of PV power plants has little impact on power generation efficiency and therefore on their economy, and the return on investment of small PV systems is not lower than that of large ones.

2) Low pollution and outstanding environmental benefits.

Distributed photovoltaic power generation projects have no noise and no pollution to air and water during power generation.

3) It can alleviate the local electricity shortage to a certain extent.

However, the energy density of distributed photovoltaic power generation is relatively low, the power of distributed photovoltaic power generation system is only about 100 watts per square meter, coupled with the limited roof area of buildings suitable for installing photovoltaic modules, which cannot fundamentally solve the problem of electricity shortage.

4) It can generate electricity and use electricity at the same time.

Large-scale ground power station power generation is step-up connected to the transmission grid, and only operates as a power generation station; Distributed photovoltaic power generation is connected to the distribution network, power generation and electricity coexist, and it is required to be consumed locally as much as possible.

At present, photovoltaic power generation has been widely used, and the corresponding control system is relatively complete and reliable; Such as hotels, islands, factories, family villas, offshore drilling platforms, communication base stations, etc., are all applying photovoltaic power generation in large quantities. Save resources, save electricity costs, multiple power supply methods, and more secure electricity;

Distributed photovoltaic power generation includes grid-connected, off-grid and multi-energy complementary microgrids.

Grid-connected distributed generation is mostly used near users, generally connected to the grid with medium and low voltage distribution networks, self-consumption, can not generate electricity or insufficient power from the Internet to buy electricity, when the power is redundant, to sell electricity online: off-grid distributed photovoltaic power generation is mostly used in remote areas and island areas, it is not connected to the large power grid, and uses its own power generation system and energy storage system to directly supply power to the load; The distributed photovoltaic system can also be combined with other power generation methods to form a multi-energy complementary micro-power system, such as water, light, wind and storage complementary power generation system, etc., which can be operated independently as a microgrid or integrated into the grid network.

First of all, the return on investment is very high.

Because the output power is relatively small, the return on investment is not low. 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.

Secondly, it does not occupy land resources.

Because distributed photovoltaic power generation basically does not occupy land resources, and can make full use of the surface of the building, it can generate and supply power nearby, and no or less transmission lines are used, which reduces the cost of transmission. Photovoltaic modules can also be a direct replacement for traditional wall and roof building materials.

In addition, the environmental benefits are outstanding.

Because he is less polluting, environmentally friendly, and has outstanding environmental benefits. In the process of power generation, the distributed photovoltaic power generation system does not consume fuel, does not emit any substances including greenhouse gases, has no noise, and does not pollute air and water.

The most important point is that it can relieve the shortage of electricity.

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.

Last but not least, it's very flexible.

The distributed photovoltaic power generation system has an effective interface with the smart grid and microgrid, and the operation is flexible, and the local off-grid power supply operation can also be realized under appropriate conditions.

As distributed photovoltaic power generation advocates the principle of nearby power generation, nearby grid connection, nearby conversion, and nearby use, it can not only effectively increase 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. Its high energy utilization rate and flexible construction mode will become the main direction of photovoltaic application in China. At present, the most widely used distributed photovoltaic power generation system is the photovoltaic power generation project built on the roof of various buildings, the roof of agricultural facilities and the roof of family houses.

The requirement for these project applications is that it must be connected to the public power grid, or together with the public power grid to supply power to nearby users, and the generated power is generally fed directly into the low-voltage distribution network or the medium and high voltage power grid of 35kV and below.

1. The photovoltaic power supply is on the user side, and the power generation is supplied to the local load, which is regarded as the load, which can effectively reduce the dependence on the power supply of the grid and reduce the line loss. Self-consumption reduces electricity costs.

2. Make full use of the surface of the building, and the photovoltaic panels can be used as building materials at the same time to effectively reduce the floor area of the photovoltaic power station. And the site we utilize is the customer's roof.

3. Effective interface with smart grid and microgrid, flexible operation, independent operation of the power grid under appropriate conditions. We have a high-quality service team, technical personnel, to ensure the safety of electricity on the user side, timeliness. If you don't understand, you can go down again.

PV power generation includes both distributed and centralized. Distributed refers to our homes, where we use unused rooftops for small-scale installations. Centralized refers to large-scale power stations, generally large-scale factories or barren mountains.

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.