Control method for butterfly power generation two-axis tracking structure based on polar axis coordinate system

A dual-axis tracking and control method technology, applied in the field of solar power generation, can solve the problems of poor structure tracking efficiency, lower output efficiency of dish-type power generation structures, and increased maintenance.

CN104793639AInactive Publication Date: 2015-07-22TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-07-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a control method for a butterfly power generation two-axis tracking structure based on a polar axis coordinate system and belongs to the field of solar power generation. The control method for the butterfly power generation two-axis tracking structure based on the polar axis coordinate system is characterized by including the steps of (1), setting initial values; (2), computing n and delta; (3), computing omega sr, omega ss, tss and tsr; (4), computing tz, judging whether tz> / =tsr or not, executing a step (5) if yes, and returning to the step (4) if not; (5), returning to the step (5) if it is cloudy, and executing a step (6) if it is not cloudy; (6), stopping the structure if a limit switch is touched, and executing a step (7) if the limit switch is not touched; (7), computing gamma s, adjusting alpha s and the gamma s, and executing a step (8); (8), comparing R2, R2', R2'' and R2''', judging whether R2= R2'= R2''= R2''' is true or not, if yes, keeping the alpha s and the gamma s and executing a step (13), and executing a step (9) if not; (9), judging whether R2 / = R2' / = R2'' / = R2''' is true or not, if yes, adjusting the alpha s and the gamma s sequentially and executing the step (13), and executing a step (10) if not; (10), judging whether R2= R2' / = R2''= R2''' is true or not, if yes, adjusting the alpha s and executing the step (13), and executing a step (11) if not; (11), judging whether R2= R2'' / = R2'= R2''' is true or not, if yes, adjusting the gamma s according to the S and executing the step (13), and executing a step (12) if not; (12), seeking Rmin, adjusting the alpha s and the gamma s sequentially and executing the step (13); (13) judging whether delta t is terminated or not, executing a step (14) if yes, and returning to the step (13) if not; (14), judging whether tz> / =tss or not, stopping the structure if yes, and executing the step (5) if not.
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Description

technical field

[0001] The invention belongs to the technical field of solar power generation, and in particular relates to a control method for a butterfly power generation biaxial tracking structure. Background technique

[0002] At present, the development and utilization of renewable energy has been increasingly concerned by the governments of various countries, and the conversion of solar energy into electrical energy has great development potential in the near future. According to the forecast of the EU Joint Research Center in 2004, by the end of this century, the application of solar energy will exceed 70% of the world's energy supply. Most of the existing dual-axis tracking structures for dish-type power generation (hereinafter referred to as "structures") are based on the dual-axis tracking method of the horizon coordinate system, and most of them do not consider the azimuth of the sun's rising azimuth, the azimuth of sunset, the distance between the local longitud...

Examples

Embodiment Construction

[0050] Such as figure 1 Shown is the structural diagram of this embodiment, the rated power of the upper stepping motor 9 and the inclined axis stepping motor 13 is selected as 200W, the rated voltage is 50V, and the rated current is 4A. The maximum output of the Stirling generator installed on the structure is The power is 1000W, the gear ratio is 50:1; the selected photoresistor is CdS photoresistor.

[0051] Taking Shanghai at 15:00 on September 22, 2013 as an example, the control method steps are (1) set the minimum operating angle Δ=0.1° and the interval time between each operation Δt=5 minutes, and the local longitude and latitude are respectively 121.48° and 31.2 °, the longitude (i.e. the longitude of Beijing) of the location of the local standard time is 116.4 °, it is determined that the angle between the swing pole 18 and the ground plane is θ=φ=31.2 °, and the angle signal S of the sampling encoder 28 is 0 ° , perform step (2); (2) determine that September 22 is t...