What factors affect the photovoltaic power generation?

Add Time：2020/5/7    Views：330

1. Lighting conditions: The home photovoltaic power station uses solar power to generate electricity. The better the natural lighting resources, the greater the power generation. In addition, the areas under the same lighting conditions will be installed in strict accordance with the optimal inclination after preliminary investigation and design The power generation capacity of the power station will be significantly better than that of the power station that has not been surveyed and designed in the early stage and has not been installed according to the optimal inclination.

2. Product quality:

①Component quality. Photovoltaic modules with good quality and high conversion rate naturally generate more electricity.

②Inverter quality. The conversion efficiency of a good quality inverter is high, and the natural output power generation will be higher.

3. Installation quality: professional and reliable installation service will not damage all parts of the product, and can be installed in strict accordance with the optimal inclination of the components, and will not cause hidden dangers in construction, to avoid subsequent safety problems such as electrical leakage, fire and lightning strike. Unprofessional installation may damage parts of the product and may even cause safety problems.

4. Daily operation and maintenance: Dust, occlusion, etc. will affect the conversion efficiency of photovoltaic modules. Therefore, frequent cleaning of the surface of photovoltaic modules will help to increase power generation.

5. After-sales warranty: professional after-sales can protect the life of the power station and extend the profit period, and brand power stations can also provide professional quality assurance services to avoid worries.

Therefore, based on the above points, if the sunshine conditions cannot be changed, if you want to let the power generation of your own power station beat 99% of users, there are several methods.

1. Strictly control the quality of photovoltaic power plants

Photovoltaic modules, inverters and batteries are not general consumer products, with a service life of several years or even decades. However, their long-term reliability cannot be judged from their appearance and instant detection. In order to ensure the quality and long-term reliability of photovoltaic products and components, users can adopt the following measures:

(1) The most basic is to require the manufacturer to provide authoritative testing and certification reports to ensure that the technical performance of the products submitted to the inspection meets the technical standards and has passed the third-party testing, and the mass-produced products and the products submitted to the inspection follow the same standard produce;

(2) Given that neither photovoltaic modules nor inverters are short-term consumer products, random inspections are required after one year of on-site operation, and the "infancy" failure rate should be within the scope of the contract.

(3) In addition to the quality of products and components, the design and construction of photovoltaic projects are also very important. In order to ensure the quality of the project, the project developer can also entrust a qualified and experienced third party to conduct the whole process review and supervision of the engineering design, construction and installation, project acceptance, etc.

2. Pay attention to the safety of the photovoltaic system and avoid catastrophic accidents

Safety is the most important component of photovoltaic system quality. The safety of photovoltaic systems includes: building safety, power grid safety, anti-shock, anti-wind, anti-lightning, fire and arc protection, anti-theft, anti-sandstorm, etc. Building safety includes building load, anti-leakage, non-destructive insulation and building fire protection. Building safety assessment requires professional departments. The distributed photovoltaic integrated with building should first pass building safety assessment before construction. If the pole insulation is damaged, a parallel circuit arc will be generated, and the ground insulation will be damaged, which will cause an arc to ground. Therefore, if the quality of cables, connecting devices, contactors, circuit breakers is wrong or the engineering installation is not serious, the arc may occur. Causes fire.

The wind resistance of the system needs to be designed according to the local maximum wind speed in 30 years, but it needs to be optimized and balanced among various factors such as the installation angle of the square array, the annual power generation, the building load, the floor space, and the shadow occlusion. The load is directly related. The square array inclination designed to maximize the annual power generation may need to withstand greater wind loads, thus requiring a greater weight, which just exceeds the maximum load the building can withstand. , This requires changing the inclination of the guideline to adapt to the building load; for another example, a higher inclination requires a larger footprint, which increases the cost. Sometimes the roof area is limited, and there is no greater spacing between the squares, so The wind resistance design of the square array needs to adapt to local conditions.

3. Focus on daily operation and maintenance

(1) Select a manufacturer with data monitoring service, so that you can view the power generation data of the power station anytime, anywhere, in order to find problems and solve problems in advance.

(2) Choose a manufacturer with after-sales warranty services to provide regular after-sales inspections.

(3) Strengthen daily cleaning and maintenance in order to improve the conversion efficiency of photovoltaic modules.