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Photovoltaic power station adjusting method for adjusting angle of photovoltaic panel in the segmented mode

A photovoltaic power station, segmented adjustment technology, applied in the direction of photovoltaic power generation, photovoltaic module support structure, photovoltaic modules, etc., can solve problems such as conflicting adjustment angles of operation and maintenance personnel, enlarged spacing of photovoltaic arrays, limited operating flexibility, etc., to achieve The effect of increasing power generation, small power, and improving land use efficiency

Active Publication Date: 2021-02-19
山东东能建筑工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual use process, the adjustment process often requires manual participation. Even if it only needs to be adjusted 2-3 times a year, the operation and maintenance personnel are also resistant to the operation of adjusting the angle.
[0010] Based on the "overall adjustment" mode, the common problems of the above several support structures are: due to the large adjustment range, it is difficult to realize mechanized automatic adjustment at low cost; and, if the support performance is improved, the operation of adjusting the angle is flexible Similarly, if the operational flexibility of adjusting the angle is improved, the support performance will be limited; this is also the technical solution in the prior art that only adjusts the angle 2-3 times a year without further subdivision The reason for increasing the power generation by increasing the regulation frequency
[0013] 2. As the seasons change throughout the year, the situation of shadow occlusion will also vary greatly; however, when designing the installation angle and the spacing of photovoltaic arrays, the worst situation must be considered and sacrificed;
[0014] 3. For high latitude areas, even if the best inclination angle of a single-row photovoltaic array is greater than 45º, the "fixed solution" will tend to choose an installation inclination angle of no more than 45º, because when the installation inclination angle exceeds 45º, the spacing between photovoltaic arrays will be sharply reduced. enlarged and unbearable

Method used

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  • Photovoltaic power station adjusting method for adjusting angle of photovoltaic panel in the segmented mode
  • Photovoltaic power station adjusting method for adjusting angle of photovoltaic panel in the segmented mode
  • Photovoltaic power station adjusting method for adjusting angle of photovoltaic panel in the segmented mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]The general determination principle of "the duration of shadow-free shelter for photovoltaic arrays" is that the photovoltaic array should not be shaded from 9:00 to 3:00 pm on the winter solstice day. Within a day, the changing law of the solar altitude angle is first from small to large, and then from large to small; for high latitude areas, the annual comprehensive best inclination angle of photovoltaic array installation is larger, and the maximum value of the solar altitude angle is smaller. , Therefore, the variation of the solar altitude angle throughout the day is also small; for low latitude areas, the annual comprehensive best inclination angle for photovoltaic array installation is small, and the maximum solar altitude angle is large, so the solar altitude throughout the day The angle of change is also larger.

[0042]In this embodiment, the schemes are described in detail in combination with the drawings and based on the above-mentioned features.

[0043]Such asfigure 2 ...

Embodiment 2

[0055]On the basis of Example 1, the specific adjustment process of this program in one day and the change of adjustment strategy as the season changes.

[0056]The specific adjustment process in a day is:

[0057]First: In the morning, the incident angle b of the sun is small.image 3 The form shown, namely a1<a<a2; Its purpose is to reduce the spacing of the photovoltaic array while ensuring the duration of no shadows;

[0058]Second: As time goes by, the solar incidence angle b becomes larger. At this time, gradually reduce the angle of a2, try to make the angle between the lower photovoltaic array 203 and the solar incidence angle b closer to 90º, which will absorb more At the same time, gradually increase the angle of a1 without causing obstruction, so that the angle between the upper photovoltaic array 201 and the solar incident angle b is gradually increased, thereby absorbing more sunlight energy;

[0059]Third: The solar incidence angle b reaches the maximum at noon and then gradually b...

example 1

[0068]Example 1. Taking a higher latitude area as an example, the annual comprehensive best inclination angle is 40º, that is, a=40º;

[0069]In winter, the maximum solar altitude angle is only about 25º. At this time, the shape of the photovoltaic array will remain "trapezoidal" throughout the sky, and the angles of a1 and a2 can be fixed almost all day;

[0070]In the spring and autumn, the maximum solar altitude angle is about 45º. At this time, the shape of the photovoltaic array throughout the day is: from the "trapezoid" in the morning to the "linear" at noon, and then in the afternoon. Gradually change back to "ladder type";

[0071]In summer, the maximum solar altitude angle is about 70º. At this time, the shape of the photovoltaic array throughout the day is: from the "trapezoid" in the morning to the "broken line" at noon, and then gradually back to "in the afternoon" Ladder type"; in order to simplify the operation, the angle of a1 can be fixed throughout the day, and only the ang...

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Abstract

A photovoltaic power station adjusting method for adjusting the angle of the photovoltaic panel in the segmented mode is characterized in that the photovoltaic power station comprises a plurality of rows of photovoltaic arrays, and each row of photovoltaic arrays are at least divided into three sections which are connected with one another, namely the upper section of photovoltaic array, the middle section of photovoltaic array and the lower section of photovoltaic array; the installation inclination angle a of the middle section of photovoltaic array is a fixed value and cannot be adjusted; the inclination angle a1 of the upper section of photovoltaic array and the inclination angle a2 of the lower section of photovoltaic array can be respectively adjusted; and by breaking up the whole into parts, the flexibility and the stability are both considered, and the purposes of reducing the land use amount and achieving more complex and more accurate adjustment can be achieved.

Description

Technical field[0001]The invention relates to a photovoltaic power station adjustment method for adjusting the angle of photovoltaic panels in sections. The photovoltaic support and photovoltaic array are divided into upper, middle, and lower sections. The middle section is fixed and the upper section and the lower section are separately adjusted independently. It is zero, taking into account flexibility and stability, and can achieve the purpose of reducing land use and achieving more complex and accurate adjustment goals; it belongs to the technical field of photovoltaic power plants.Background technique[0002]The current global renewable energy development and utilization scale continues to expand; my country also vigorously develops renewable energy as the core content of promoting energy transition and an important way to deal with climate change; among them, photovoltaic power generation is one of the important technical means. In recent years, the technical cost of photovoltai...

Claims

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Application Information

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IPC IPC(8): H02S20/30G05D3/10
CPCH02S20/30G05D3/105Y02E10/50
Inventor 朱杰
Owner 山东东能建筑工程有限公司
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