With the development of the times and national policies vigorously advocated, photovoltaic power plants into millions of households.However, while the completion of their respective PV power plants, the operation and maintenance of PV power plants is a big problem.
How to make their own photovoltaic power plant generating value has been the maximum efficiency ? Chiko Solar thinks that it is necessary to find out the exactly factors that affect the solar power generation ,then to prevent unnecessary loss of power generation.
As one of the world's leading manufacturers of solar mounting, Chiko Solar has many years experience in production and installation guidance of solar mounting, and summarized the following factors that most affect the solar power plant generation .
The following is Chiko Solar to make the crystalline silicon solar panels as an example, combined with the application of environmental analysis, discusses the solar panels in the long-term use of the process itself may exist defects, and the affect of external environment resulting in power decay and reduce, Summed up the impact of solar panel output power and attenuation related factors are as follows:
1. The quality of PV modules: due to the cracked cell,oxidation,Weld, backplane and other material defects and the long-term use of aging and other factors, resulting in long-term operation of solar panels power is affected, resulting in solar panels power generation Low volume. It is noteworthy that the crystal structure of single crystal determines its anti-cracking performance is more excellent.
2.PID effect: solar panels long-term work in the outside world, due to water vapor through the backplane infiltration to the internal solar panels, resulting in EVA hydrolysis, acetate ions in the glass precipitation of metal ions, resulting in solar panels and the border between the internal circuit bias Set voltage and electrical performance decay, a sharp decline in power generation.
3. Solar mounting rack install angle: the total solar radiation from the inclined surface and direct solar radiation separation principle available: the total solar radiation on the inclined surface Ht by the direct solar radiation Hbt amount of sky Hdt and the ground surface scattering The amount of reflected radiation Hrt composition, namely: Ht = Hbt + Hdt + Hrt. In the same geographical position, due to the different inclination angle of the bracket, the cumulative amount of sunlight absorbed is different, and the cumulative difference in the amount of radiation causes the difference in power generation.
4. Weather Factors: The weather is also one of the factors that affect the power generation performance of solar panels. In rainy weather and thick clouds, solar radiation intensity is reduced, solar cells absorb less sunlight, power generation is reduced, and low-intensity single-crystal weak light response is better than polycrystalline. Solar panels in the conversion efficiency of certain circumstances, the photovoltaic system is generated by the solar radiation intensity of the decision. Solar power generation capacity of photovoltaic power plants directly related to the amount of solar radiation, solar radiation intensity, spectral characteristics are changed with the meteorological conditions.
Shadow shading: solar panels in the work process due to the shading of the partial obstruction and the degree of dust settling, guano pollution will cause "hot spot effect" is blocked part of the solar panels will not provide power contribution and solar panels Internal energy consumption load, while causing local temperature increase of solar panels, overheating area can cause EVA to accelerate the aging of yellow, so that the light transmittance of the region decreased, thus further deteriorating hot spots, leading to solar cell solar panel failure worsened.
6. Temperature Coefficient: The temperature coefficient of crystalline silicon cell is generally -0.4% -0.45% / ℃, and the single crystal temperature coefficient is less than polycrystalline. Changes in the ambient temperature and the heat generated by the solar panel in the process of operation cause the temperature of the solar panel to increase, which may also cause the power generation of the solar panel to decrease.
7.Photo board cleaning and maintenance: solar photovoltaic panels in the wild long-term conditions, dust and other debris will landed on the glass covering the long-term large amount of dust or dust settling, weakened the penetration of sunlight, and led to the surface of the solar panel The temperature rise and thus the efficiency of solar panels power generation. When the dust on the surface of the solar panel is more serious, the difference between the power generation before and after cleaning is 5.7%. If the surface area of the solar panel is not cleaned for a long period of time, the difference in the amount of power generated by the dirt can reach 10% or more.
The above only from the solar panel itself and the solar mounting angle, as well as external environmental factors affect the solar panel power factor analysis, in addition to the above-mentioned power generation efficiency and power generation capacity factors, but also because the electrical system and other Factors will cause the solar power of solar panels in the process of decay, reduce power generation and so on.
Subsequent : Chiko solar will be in experimental research and practice, in process improvement, technology upgrading, material development, especially in the field of solar mounting rack to do more relevant research to solve and improve the impact of solar panel power generation.
Chiko Solar more efficient and flexible solar mounting solutions waiting for you here!
Welcome to contact us !
skype
Plant Gallery