An unobstructed tracking method for a dual-axis solar photovoltaic power generation system

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A solar photovoltaic and power generation system technology, applied in the field of solar panel tracking, can solve the problems of lower power generation efficiency, front solar panels blocking rear solar panels, and increased land area occupied by the power generation system.

Active Publication Date: 2016-12-14

深圳市益力盛电子有限公司

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Problems solved by technology

[0003] However, there is another problem that cannot be ignored in the solar tracking system, especially in the large-scale solar photovoltaic power generation system, the sun altitude angle is low in the morning and evening, during the tracking process, the front row of solar panels will partially or even completely block the rear row of solar panels

In this way, although the solar panels in the front row can generate electricity normally, the power output of the solar panels in the rear row is reduced due to shading, which leads to a decrease in the overall power generation of the solar panel array; at the same time, when the photovoltaic cells are shaded, the load will be reduced. Consumption of electric energy, with the increase of energy consumption, hot spot phenomenon of overheating or even breakdown will occur, which seriously affects the reliability and service life of the power generation device

[0004] In order to reduce or avoid the shadow phenomenon, the current power generation system adopts the method that the distance between adjacent solar panels is twice the length of the solar panel, but this can only effectively avoid shadow occlusion for a period of time, that is, shorten The time of shadow shading, rather than completely eliminating the shading phenomenon, at the same time, increasing the distance between solar panels will lead to an increase in the land area occupied by the power generation system and reduce the power generation efficiency

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Embodiment 1

[0094] In the implementation example 1, the specific measurement time is eight o'clock Beijing time.

[0095] 1. Through formula (1)(2)(3)(4)(5), the solar elevation angle as=11.33° and the solar azimuth angle rs=-73.12° are obtained. Then there are |cos rs|=0.29, |sin rs|=0.96.

[0096] 2. |cos rs|

[0097] 3. L'=L|sin rs|=8.61, S=b / sin as=10.18. Therefore S > L', so the shadow of S1 does occlude S3.

[0098] 4. According to formula (11), adjust the inclination angle of the solar panel Make the shadow of S1 just not block S3.

[0099] By realizing the above steps, the method for tracking the sun without occlusion at this time is completed.