Photovoltaic bracket guide rail 41 * 41 Photovoltaic bracket, U-shaped photovoltaic bracket with larger quantity and better performance

There are two technical considerations for the ground matrix of solar photovoltaic brackets:

1. It is the requirement of wind resistance for the support;

2. Is the distance between the bracket matrix and the bracket matrix.

To ensure wind resistance, the bracket is often mixed with aluminum alloy and steel structure. This ensures that the bracket is wind resistant and does not cause hidden dangers due to unstable fixation of the solar bracket, while also ensuring the overall appearance of the bracket.

Solar photovoltaic car sheds are very popular abroad. They mainly combine photovoltaic modules with the roof of the car shed, which can not only meet parking needs, but also supply power to the grid, increase income, and save energy and environmental protection in photovoltaic power generation. At present, the solar powered shed support system is widely promoted in China to meet the current parking needs. Building green and energy-efficient solar powered car sheds is an effective solution for large scale vehicles with limited land.

Advantages of solar photovoltaic shed support system

Advantages of Shenlong Bayer Photovoltaic Car Shed

Photovoltaic car sheds are power generation systems that use solar cells to directly convert solar energy into electricity. Its main components are photovoltaic modules, brackets, and inverters. Its advantages are high reliability, long service life, no environmental pollution, vertical power generation, and grid connected operation, which are welcomed by households and enterprises and have broad development prospects.

Energy saving brings benefits at the same time

Solar powered car sheds have emerged, and compared to installing photovoltaic modules on the roof of the car shed, combining photovoltaic modules with the roof of the car shed can save costs. It can achieve all the functions of traditional car sheds and generate electricity to bring benefits to car owners. Generally supported by steel structures, it is simple and elegant, fashionable and aesthetically pleasing, and is a clean and environmentally friendly new energy source that effectively alleviates social environmental and energy pressures.

Distributed photovoltaic grid connected system refers to a grid connected power generation system that utilizes photovoltaic modules to directly convert solar energy into electrical energy. The system is located near the user, and the generated electricity can be used locally. It is connected to the power grid at a voltage level of 10 kV or below. The total installed capacity of a single parallel network point (380 V) does not exceed 6 megawatts, and the total installed capacity of a single parallel network point on the 220 V user side does not exceed 8 kilowatts.

Distributed photovoltaic power generation systems can be installed in any place with sunlight, including the ground, top of buildings, side facades, balconies, etc. Widely used in schools, shopping malls, villas, houses, factories, enterprises and institutions on roofs, car sheds, and on top of bus stop signs; It can be installed on concrete, color steel plates, and porcelain tile roofs.

Types of photovoltaic car sheds

The types of photovoltaic car sheds are divided into dual parking shed and multi parking shed. Most of them are modular designs that can be used alone or in multiple combinations, making them easy to expand, ranging from a few to hundreds of parking spaces, with strong flexibility. If ordinary photovoltaic modules are used, the overall cost is lower. If the installed capacity is large, the returns are high, and the investment payback period is short.

Type of solar powered shed support system

If the solar powered shed support system is applied, a reasonable area should be designated to construct a photovoltaic three-dimensional parking shed, achieving small space and multiple parking spaces; Secondly, the top of the car shed must be accessible to direct sunlight. In addition, an intelligent parking guidance system can also be built to quickly guide vehicles through.

Photovoltaic brackets have been widely used in solar energy, but regardless of the performance of the equipment, there are always some factors that affect its normal use and application safety, so such equipment is no exception. Below, we will introduce the following factors to everyone:

1、 Application safety factor of bracket

1. The photovoltaic bracket is an indispensable part of the solar photovoltaic system, and its powerful support function is very important.

2. All brackets must be fully assembled according to the designated plan, so any bracket must be assembled randomly to disrupt the original stability of the city.

3. Do not randomly assemble any parts on the product, let alone damage them. Instead, stop frequently and briefly. If there are problems, please replace or handle them and avoid all influencing factors.

When using, only fixed brackets can ensure the safety of the equipment. Therefore, many details cannot be separated, otherwise the safety of using the bracket will also be affected.

5. Clean the bracket properly and do not allow any debris to enter. After safe installation, it cannot be moved arbitrarily. If required, the operation must be stopped after canceling the relevant signal.

2、 Diversification of species and growth of wind resistance

1. In terms of functionality: Due to its limited outdoor use and greater wind resistance, its wind resistance can withstand winds of 216 km/h, providing a stable foundation for the equipment.

2. Structurally: The scope of the support includes ordinary floors, flat roofs, columnar lighting systems, adjustable roofs, etc., and solar single axis tracking brackets and solar dual axis tracking brackets have also been updated.

3. Bracket products are emerging and receiving increasing attention. Not only has the structure lost optimization, but the functionality is also getting better and better, which deprives the equipment of sufficient guarantee for use. The use of functions and other aspects further enhances the convenience brought by the bracket.

Understand and master the reasons that affect the safety of photovoltaic bracket applications, and find preventive or maintenance methods based on these reasons to maintain the normal use of machinery. In fact, as long as it is used normally and regularly maintained, there will not be many problems.

Shenlong Bayer photovoltaic power generation relies on solar cell modules, utilizing the electronic properties of semiconductor materials to convert light energy into electrical energy. The grid connected photovoltaic power generation system converts the received solar radiation energy into high-voltage direct current through high-frequency direct current conversion through photovoltaic arrays. After inverter inversion, it outputs sinusoidal AC current of the same frequency and phase as the grid voltage to the power grid.

Compared to solar photovoltaic power plants operating vertically, integrating photovoltaic power plants into the power grid can bring many benefits, which can be summarized as follows:

1. Eliminating the need for batteries as energy storage;

2. With the continuous progress of inverter manufacturing technology, the stability and reliability of inverters will be further improved in the future;

3. The photovoltaic array can always operate at high-power points, and the power grid receives all the electricity generated by solar energy, improving the efficiency of solar power generation;

4. The Shenlong Bayer power grid has gained profits, and the distributed photovoltaic system can provide electricity to local users, alleviating the transmission and distribution burden of the power grid;

5. The combination of Shenlong Bayer photovoltaic modules with buildings can both generate electricity and serve as building materials and decorative materials.

What are the components of a grid connected photovoltaic power generation system?

1. Photovoltaic array (fixed or tracked);

2. Combiner box;

3. DC distribution cabinet;

4. Grid connected inverter;

5. AC distribution cabinet;

6. Grid access system (boosting, metering equipment, etc.);

7. AC/DC cables;

8. And communication devices;

9. Lightning protection and grounding device.

The photovoltaic array converts solar energy into direct current energy. After being inverted by the DC and AC inverters, the voltage level of the photovoltaic power station connected to the grid is determined based on the technical regulations for connecting the photovoltaic power station to the grid. After being boosted by a transformer, it is connected to the medium or high voltage grid.

Solar panels are the core part of solar power generation systems. The function of solar panels is to convert the solar energy into electrical energy, and then output direct current to store in the battery. Solar panels are one of the important components of grid connected photovoltaic power generation systems, and their conversion rate and service life determine whether the components have practical value.

V grid connected inverter is an inverter power source applied in the field of solar photovoltaic power generation. The grid connected inverter converts the AC power generated by solar panels into AC power that can be directly connected to the grid through power electronic conversion technology. It is an essential key component in photovoltaic power generation systems. So what is the role of photovoltaic grid connected inverters? What is the working principle?

1、 The role of photovoltaic grid connected inverters

The inverter not only has the function of direct AC conversion, but also has the function of maximizing the performance of solar cells and system fault protection. In summary, there are automatic operation and shutdown functions, high-power tracking control function, anti single operation function (for grid connected systems), automatic voltage adjustment function (for grid connected systems), DC detection function (for grid connected systems), and DC grounding detection function (for grid connected systems).

1. Automatic operation and shutdown functions

After sunrise in the morning, the intensity of solar radiation gradually increases, and the output of the solar cell also follows. When the output power required for inverter operation is reached, the inverter will automatically start operating. After entering operation, the inverter constantly monitors the output of the solar cell module. As long as the output power of the solar cell module is greater than the output power required for inverter operation, the inverter will continue to operate; Until sunset, the inverter can operate even on cloudy and rainy days. When the output of the solar cell module decreases and the inverter output approaches 0, the inverter forms a standby state.

2. High power tracking control function

The output of solar cell modules varies with the intensity of solar radiation and the temperature of the solar cell module itself (chip temperature). In addition, due to the characteristic of voltage decreasing with current in solar cell modules, there are excellent operating points for obtaining high power. The intensity of solar radiation is constantly changing, and obviously the optimal operating point is also changing. Compared to these changes, the operating point of the solar cell module is always at the high-power point, and the system always obtains high-power output from the solar cell module. This control is called high-power tracking control. The main feature of inverters used in solar power generation systems is that they include the function of High Power Point Tracking (MPPT).

3. Power grid detection and grid connection function

Before grid connected power generation, the grid connected inverter needs to take power from the grid, detect the voltage, frequency, phase sequence and other parameters of the grid power transmission, and then adjust the parameters of its own power generation to synchronize with the grid electrical parameters. After that, grid connected power generation can be completed.

4. Zero (low) voltage ride through function

When a power system accident or disturbance causes a voltage drop at the grid connection point of a photovoltaic power plant, within a certain range and time interval of voltage drop, the photovoltaic power plant can ensure continuous operation without disconnection from the grid.

5. Detection and Control of Island Effect

During normal power generation, the photovoltaic grid connected power generation system is connected to the large power grid to transmit active power to the grid. However, when the grid loses power, the photovoltaic grid connected power generation system may still continue to operate and be in a standing operation state with the local load, which is called the island effect. When an inverter experiences islanding effects, it can pose significant safety hazards to personal safety, power grid operation, and the inverter itself. Therefore, the grid connection standard for inverters stipulates that photovoltaic grid connected inverters must have islanding detection and control functions.

2、 Precautions for installation of photovoltaic grid connected inverters

1. Before installation, the inverter should be checked for any damage during transportation.

2. When selecting the installation site, it should be ensured that there is no interference from any other power electronic equipment in the surrounding area.

3. Before making electrical connections, it is essential to cover the photovoltaic panel with opaque materials or disconnect the DC side circuit breaker. Exposed to sunlight, photovoltaic arrays will generate dangerous voltages.

4. All installation operations must be completed by technical personnel only.

5. The cables used in the photovoltaic power generation system must be firmly connected, well insulated, and of appropriate specifications.

6. All electrical installations must meet local and electrical standards.

7. The inverter can only be connected to the grid after obtaining permission from the local power department and completing all electrical connections by technical personnel.

8. Before carrying out any maintenance work, the electrical connection between the inverter and the power grid should be disconnected first, and then the DC side electrical connection should be disconnected.

9. Wait for at least 5 minutes until the internal components are fully discharged before proceeding with maintenance work.

10. Any faults that affect the safety performance of the inverter must be immediately eliminated before the inverter can be turned on again.

11. Avoid unnecessary circuit board contact.

12. Comply with static electricity protection regulations and wear an anti-static bracelet.

13. Pay attention to and follow the warning signs on the product.

14. Perform a preliminary visual inspection of the equipment for damage or other hazardous conditions before operation.

15. Pay attention to the hot surface of the inverter. For example, the heat sink of power semiconductors remains at a high temperature for a period of time after the inverter is powered off.

2、 The working principle of photovoltaic grid connected inverters

When the public power grid is powered off, the grid side is in a short-circuit state, and the inverter connected to the grid will automatically protect due to overload. When the microprocessor detects an overload, in addition to blocking the SPWM signal, it will also disconnect the circuit breaker connected to the power grid. At this time, if the solar cell array has energy output, the inverter will operate in a single operating state. Single operation control is relatively simple, which is a negative feedback state of AC voltage. The microprocessor detects the output voltage of the inverter and compares it with the reference voltage (usually 220V), and then controls the PWM output duty cycle to achieve inverter and voltage stabilization operation.

Of course, the prerequisite for single operation is that the solar cell array can provide sufficient power at that time. If the load is too large or the sunlight conditions are poor, the inverter cannot output sufficient power, and the terminal voltage of the solar cell array will decrease, resulting in a decrease in the output AC voltage and entering a low-voltage protection state. When the power grid resumes power supply, it will automatically switch to a feedback state.

Taking quality, reasonable pricing, and customer satisfaction as the starting point of the company, and integrating service throughout the entire process of product sales. We will take technological innovation as a breakthrough point, strengthen enterprise strategic research, innovate development models, continuously improve the scientific and standardized management level of enterprises, and maximize the promotion of sustainable development. We sincerely welcome friends to cooperate with us, based on the principle of mutual benefit, to jointly explore a better future.