Discussion on the relationship between the power generation of single-crystal solar panels and various influencing factors

Solar panels absorb a large amount of light energy from sunlight and convert it into electrical energy for use. How to increase power and reduce energy loss in various aspects is also the focus of research and development to improve conversion efficiency of solar panels. Set up 3.6kW solar power generator by single-crystal material to produce the Direct Current (DC) power and it is converted into an Alternating current (AC) power through an inverter which meets the parallel conditions of AC power system and supplies loadings with the national power grid at the same time. Meanwhile, a simple monitoring system of solar power was established to rectify and record the data of solar power generation resources and related parameters by big data to analysis the settlement classification relationship. According to the power generation characteristics of the single-crystal solar panels of the power generation by sampling and related parameter data can be used to observe the relationship between solar power generation efficiency, density of illumination, temperature of panel and actual power generation. The power generation of single crystal solar cells is closely related to photos and temperatures and has a short delay effect by statistics theory and methods.


Introduction
It is estimated that oil will be used up by the world after in future much decade years so that it must be taken for granted that alternative energy sources have to be taken out but the ideal alternative energy source is to be non-pollution energy by nature and the key point is focus is on the non-exhaustion for available and taken which the solar energy is the best choice among many green energy sources.Based on the unmet demand of solar photovoltaic (PV) [1] energy and there are a lot of literatures to study at the present stage such as construction technology of solar panels by three demands of voltage, current ,power rated issue.And according to the earth's rotation path has a controller that follows the sun's trajectory [2,3] for vertical alignment of the solar light corresponds to the solar panel to gain or produce maximum power conversion.Some literatures to describe or simulate the renewable solar system [4] use Pspice [5] software or other relative analysis software [6] to build models of solar panel, furthermore, that use genetic algorithms [7], annealing model method [8], PSO method [9], bee flying method [10], artificial neural networks [11] and so on the other artificial intelligence methods to find the optimal rotation angle of solar panels, panels placement or fixed angle placement, the best power generation sequence that rely on this application and experiments cooperate with each other to confirm the solar power voltage, power and maximum power track.It is installed a 3.6kW renewable energy solar power generation system and by using parallel connective mode to supply power to the national grid at the same time.Meanwhile, a simple renewable energy

Investigation on solar cell combination method and solar panel specifications
The single-crystal solar power generation system used in this article is a power supply type that is parallel to the national grid after by the inverter.The single-crystal solar power generation system used in this article is a power supply type that is parallel to the national grid after the inverter.That singlecrystal solar panel to produce the direct current (DC) power and it is converted into an alternating current (AC) power through an inverter which is met the parallel conditions of AC power system and supply loadings with the national power-grid at the same time.The electrical parameters of single-crystal solar modules are shown in Table 1.The overall solar panel is composed of solar modules connected in series and parallel.The connection method is shown in Figure 1.
(1) Solar panel installation capacity consists of a total of 20 solar modules with a rated power of 180W, 180W×20=3600W=3.6kW.

Construction of solar renewable energy and monitoring system
As shown in Figure 2.This is the homepage of data collection for renewable energy solar power generation systems.Various parameters can be monitored at any time to display solar power generation voltage, power generation current, converter output, power, temperature and Luminous, and solar power generation parameters and converter output.As shown in Figure 3.This figure shows important equipment such as solar charge controllers, battery packs, and AC/DC current convert which require regular long-term testing and maintenance to maintain the best condition to avoid danger and accidents.

Solar power curve
Table 2 shows both of the power, current generating of solar panel and output power and current of converter for 10 consecutive samples.The output current of the converter is greater than the solar panel current.It seems unreasonable but we can aimed on the double sides operation voltage which operating voltage of the solar panel is DC 359V and output voltage of the inverter is maintained at AC 220V.In this case, the output current of the converter is greater than the solar panel power generation current where is reasonable to explain that the power generated by the solar panel is greater than the output power of the inverter.The conversion efficiency is smaller than 1 but close to 1. Figure 4 is the relationship between generating power of solar panel and output power of converter.The generating power of solar panel curve and conversion power curve are similar but the solar power curve and the DC to AC conversion power curve are inversely proportional because larger the power generation and the larger the power loss.By statistics method the DC conversion AC efficiency is almost greater than 94% and its average DC conversion AC conversion efficiency is 95.15%.

Explore the relationship between important parameters and power generation
The output power generated by solar energy is directly related to the intensity of illumination without considering other factors.In addition to discussing the relationship between output power and intensity of illumination in this chapter also includes investigated the relationship between output power and panel temperature, and the relationship between intensity of illumination and panel temperature.

Relationship between solar output power and intensity of illumination
As shown in Figure 5, that ambient temperature is at a proper temperature which the relationship between solar output power and intensity of illumination is proportional, that is in same meaning, the greater the intensity of illumination will made greater of solar output power.If the solar panel continues to irradiate to reach the upper temperature limit will cause the power of the solar output decreased when the intensity of illumination increases.

Relationship curves between solar output power and temperature
Figure 6.shows the relationship between solar output power and temperature of solar panel where temperature is the temperature on the surface of the solar panel.According to the measured and recorded data, it is known that the interaction between the solar output power and the surface temperature of the solar panel is a chaotic and non-closely related.However, the long-term curve analysis can be compared as a little proportional relationship.But the solar panel temperature rise rate is far greater than the power rise rate.7 is the relationship between temperature of panel and density of illumination that mean when the higher the illumination will let the temperature will be.So the relationship between temperature and density of illumination will be directly proportional to each other but posed a delay effect occur between each other.

Conclusion
How to use the sunlight injection into solar panel and absorb the largest of energy to convert the energy form light to electricity for uses and how to increase power convert efficiency and decrease the losses in various aspects is also the focus of research and development.In this study, according to the actual solar power generation which include the monitoring system of solar power generating where is recorded the related parameters.That observe the actual conditions of solar power generation converting efficiency, density of illumination and temperature of panel and form a series of data base on the time.By statistics method which the power generation of single crystal solar panels is closely related to density of illumination and temperatures of panel, and the latter has a short delay effect with the output power.And the DC conversion AC efficiency is almost greater than 94% and its average DC conversion AC conversion efficiency is 95.15%.It is still limited by the limitations of density of illumination, efficiency of conversion power and related environmental factors regardless of the type of solar panel.Therefore, only a few appropriate areas can be installed under the condition that a large amount of solar power generating is required which makes the solar panel not the best for choose.This requires improved or synthetic materials which can provide higher heat resistance, reduce loss rates of high-temperature, increase conversion efficiency and the characteristic of low light sources to generate electricity to overcome various disadvantages in condition of environment and electricity that improve the utilization rate of solar modules or panels.

Figure 1 .
Figure 1.Schematic diagram of solar panels connected by solar modules.

Figure 2 .
Figure 2. Monitoring system of solar power.Figure 3. Solar power conversion equipment.

Figure 3 .
Figure 2. Monitoring system of solar power.Figure 3. Solar power conversion equipment.

Figure 4 .
Figure 4. Relationship between generating power of solar panel and output power of inverter.

Figure 5 .
Figure 5. Relationship curves between solar output power and intensity of illumination.

Figure 6 .
Figure 6.Relationship curves between solar output power and temperature of solar panel.

Figure 7 .
Figure 7. Relationship curves between temperature of panel and intensity of illumination.

Table 1 .
Electrical parameters of single-crystal solar module.

Table 2 .
Information on continuous current and power sampling for10 time of solar power generation.