Solar energy tracking control system and method for photo-thermal power generation

Abstract

The invention relates to a solar energy tracking control system and method for photo-thermal power generation, wherein the system and method are used for controlling of an east-west adjusting motor and a north-south adjusting motor in a solar automatic tracking photo-thermal power generation device. The tracking control system comprises a main control unit for determining whether tracking controlling is started based on a current light intensity, a sun-view motion trajectory tracking coarse adjustment unit for calculating a spatial position of the sun based on current time and thus controlling an east-west adjusting motor and a north-south adjusting motor to be at set positions, and a fine sensor tracking adjustment unit for fine adjustment on a reflector support based on the light intensity to enable the reflector to align at the sun. The sun-view motion trajectory tracking coarse adjustment unit and the fine sensor tracking adjustment unit are connected with the main control unit. Compared with the prior art, the tracking control system and method have the following advantages: the sun-view motion trajectory tracking coarse adjustment and the fine sensor tracking adjustment are combined, so that the tracking speed is increased and the tracking precision is improved.

Description

technical field [0001] The invention relates to a solar tracking control system and method, in particular to a solar tracking control system and method for photothermal power generation. Background technique [0002] At present, the ways of tracking the sun are mainly divided into sensor tracking and apparent solar motion trajectory tracking. The main control process of sensor tracking is: collect the sun's light intensity signal and its deviation signal through the photosensitive sensor, and the horizontal and vertical position deviation signal of the trough photothermal power generation solar heat collector, and then feed it back to the data processor and controller , after data processing and amplification, a driving signal is issued, the rotation of the stepping motor is controlled through the driving circuit, and the angle is slowly adjusted through the deceleration mechanism to reduce the deviation. The high-precision sensor tracking system is limited by the optical sy...

AI Technical Summary

Problems solved by technology

The solar tracking algorithm is complicated, and the on-site controller needs to perform a large number of calculations in real time. Therefore, the on-site controller is required to have high data processing capabilities and large data storage space. In addition, the solar tracking also requires A high-precision angle sensor with two motion axes is required for local positioning detection, and the cost of the tracking system is relatively high

The control system of the apparent solar trajectory tracking method adopts an open-loop control method. Due to the structural instability of the tracking device, there are cumulative errors in tracking, which need to be corrected regularly; The error caused by the change of the orbit is corrected, and the tracking accuracy will decrease with time, so it also needs to be corrected regularly

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