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Active sunward tracking type solar resource measuring method

A technology of solar energy resources and measurement methods, applied in the field of active sun-tracking solar energy resource measurement, can solve the problems that three photodiodes cannot be aligned with the sun at all times, affect the accuracy of solar radiation measurement, and cosine error of radiation measurement, etc., to overcome the inability to Feedback adjustment control platform tilt angle, wide application range, continuous tracking effect

Inactive Publication Date: 2015-07-22
XIDIAN UNIV +2
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Problems solved by technology

The disadvantage of this patented technology is that the angle of the platform for fixing the photodiodes is fixed and cannot be adjusted according to the movement trajectory of the sun. As a result, the three photodiodes cannot be aligned with the sun at all times. The cosine error of radiation measurement affects the measurement accuracy of solar radiation

Method used

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  • Active sunward tracking type solar resource measuring method
  • Active sunward tracking type solar resource measuring method
  • Active sunward tracking type solar resource measuring method

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Embodiment Construction

[0036] Attached below figure 1 , to further describe the specific steps of the present invention.

[0037] Step 1, calculate the light intensity.

[0038]According to the rough adjustment sensors located in the four directions of the control platform, the light intensity voltage values ​​of the four directions are detected, and converted into digital quantities by the analog / digital converter, and the light intensity digital quantities of the four directions are converted into digital quantities. Take the average value after summing, and use the average value as the current light intensity.

[0039] Step 2, judging whether the current light intensity calculated in step 1 reaches the light intensity threshold, if so, execute step 3, otherwise execute step 4. Wherein, the value of the light intensity threshold is 260 watts / square meter.

[0040] This step is used to realize the selection of the calculation method of the daily deviation value by the two control platforms. Whe...

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Abstract

The invention discloses an active sunward tracking type solar resource measuring method and aims to achieve sunward tracking precision and continuity. Under the condition of sufficient illumination intensity, a four quadrant is used to calculate the sunward deviation of a control platform; under the condition of insufficient illumination intensity, sun trajectory is used to calculate the deviation of the control platform. By the automatic switching of the two control platform sunward deviation calculation methods, control platform sunward tracking accuracy and continuity are achieved. Due to the fact that a radiation sensor aims to the sun at any time, the cosine errors in sun radiation measuring are eliminated, and sun radiation measuring precision is increased. By the two control platform sunward deviation calculation methods, a control platform can accurately track sun trajectories, sun radiation quantity accuracy is guaranteed, and solar resource measuring precision is increased.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and further relates to an active sun-tracking solar resource measurement method in the technical field of solar resource measurement. The invention can be used to measure the richness of solar energy resources in the area where the power station is located, provide necessary basic data for the design of the photovoltaic power station, and provide scientific evaluation basis for the operation, scheduling and calculation of power generation efficiency of the photovoltaic power station. Background technique [0002] The measurement errors of current solar energy resource measurement methods are very large, about 5%. The main cause of the error is that there is relative motion between the sun and the earth, and the fixedly installed radiation sensor cannot follow the movement of the sun, so the angle between the photosensitive surface of the radiation sensor and the sun's rays can be adjusted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/12
Inventor 司栋森王政马志欣牛呈祥曹伯燕王华王保保苏锐丹
Owner XIDIAN UNIV
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