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

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.

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...

AI Technical Summary

Problems solved by technology

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 longitude and the longitude of the time zone. The influence of factors such as the longitude difference, the error between the solar time angle and the true solar time angle on the judgment of the sun position will lead to the deterioration of the tracking efficiency of the structure and the reduction of the output efficiency of the dish power generation structure; in addition, the dual-axis tracking method based on the horizon coordinate system Due to the continuous tracking of the sun's altitude and azimuth, the two stepper motors are constantly working, which reduces the service life and increases the amount of maintenance; at the same time, due to structural operation and formula calculation errors, there is a deviation between the predicted sun position and the actual sun position

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