Automatic solar tracking device

Abstract

The invention relates to an automatic solar tracking system which tracks the sun accurately in real time and is used for efficiently collecting and using solar energy. The automatic solar tracking device comprises a solar energy photovoltaic array, an adjusting device connected with the solar energy photovoltaic array and used for adjusting the position of the solar energy photovoltaic array, a stand column for supporting the adjusting device and a control system. The adjusting device is composed of a pitch angle adjusting assembly and a position angle adjusting assembly, wherein the pitch angle adjusting assembly is connected with the position angle adjusting assembly through a vertical shaft, the position angle adjusting assembly is arranged on the stand column, and the control system is used for performing closed loop control on the adjusting device. The accuracy in solar tracking of the automatic solar tracking device is smaller than 0.1, the energy consumption only occupies for 0.5% of the electric energy production of the driving photovoltaic array, and the automatic solar tracking system has the advantages of being long in service life, intact in protection function and the like.

Description

technical field [0001] The invention relates to the technical field of positioning and automatic tracking, in particular to an automatic tracking device for tracking the sun in real time and accurately for efficient collection and utilization of solar energy. Background technique [0002] Solar energy is a clean and non-polluting energy, and solar power generation has become an important way to solve the global energy crisis. At present, the battery panel arrays of large and medium-sized photovoltaic power plants in China are basically fixed. Due to the low energy density and high randomness of solar energy, the direction and intensity of the sun's illumination change with time, and are affected by natural conditions, so the solar energy cannot be fully utilized. radiant energy. In order to obtain the maximum irradiance per unit area of ​​the solar photovoltaic array and improve the utilization rate of solar energy, it is necessary to use the sun positioning and automatic t...

AI Technical Summary

Problems solved by technology

[0003] Such as the authorized announcement number CN2472151Y, the publication date is 2002.1.16, and the patent document titled "solar radiation tracking control device" proposes a pyramid-shaped photoelectric sensor to receive sunlight. When the sunlight is not perpendicular to the pyramid-shaped photoelectric sensor, When it is in the center, the output voltages of the four photoelectric panels will be unequal. As long as the output voltages of the four photoelectric panels are compared, the current sun position can be calculated, and then the stepper motor can be controlled to drive the tracking device to track the sun; its advantages It is high precision, but the disadvantage is that the structure is complex, the tracking range is small, and the cost is high. It is only suitable for scientific research; the reason is that in order to pursue tracking accuracy, it uses heating wires, temperature sensors, optical radiation detectors, four-quadrant detectors, and positioning sensors. and other modules

[0004] Another example is the authorized announcement number CN2562135Y, the publication date is 2003.7.23, and the patent document titled "Micro-power Timing Sun Tracking Device" proposes a law of 15° per hour for the solar azimuth to drive the solar panel azimuth synchronously. Rotate and perform single-axis tracking from 9:00 to 18:00; its advantage is simple structure, but its disadvantage is that the tracking error is large, resulting in low utilization of solar energy; the reason is that it does not track the sun's altitude angle and cannot realize the sun's dual-axis Tracking, and no day and night functions

[0005] In addition, due to the unreasonable setting of various transmission components and the imperfect control system of domestically produced solar tracking system products, the entire system has low transmission efficiency, small load capacity, short motor life, low tracking accuracy (about 5°), and energy consumption. High and poor engineering practicability and other deficiencies

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