Hard limiting device for realizing operation error self-elimination and wind resistance functions of solar tracking system and control method thereof

Abstract

The invention discloses a hard limiting device for realizing the operation error self-elimination and wind resistance functions of a solar tracking system and a control method thereof. The control method comprises the steps that a control unit controls a driving motor to stop current tracking operation and reversely operate for a certain number of rotations and then forwardly operate, working current I of the driving motor is also detected and compared with I0, the control unit reacquires a reference angle parameter A0 when the solar tracking system is ensured to be in the hard limiting state, and the error generated in the operation process is eliminated; and increasing of working current of the driving motor caused by the effect of external force is determined as the wind resistance state, and the control unit controls the driving motor to return to the optimal wind resistance angle. The two functions of operation error self-elimination and wind resistance state of the solar tracking system can be realized without installing an angle sensor or a wind speed sensor, and limiting and error elimination are more accurate and reliable so that the cost of the tracking system can be effectively reduced and the installing cost can be saved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation technology equipment transmission mechanism design, in particular to a hard limit device and a control method for realizing self-elimination of operating errors and wind resistance functions of a solar tracking system. Background technique [0002] The solar tracking system can track the changes of the azimuth and altitude of the sun in a timely manner, so as to ensure that the solar cell components and the sunlight are at the best irradiation angle and increase the power generation. At present, most solar tracking systems use angle sensors to ensure the accuracy of tracking and limit the tracking range. However, the cost of angle sensors is high and there is a risk of damage to photovoltaic modules and frames due to sensor failure; most wind-resistant designs use control systems and Wind speed sensors are connected to obtain wind speed information, which requires purchasing ...

AI Technical Summary

Problems solved by technology

At present, most solar tracking systems use angle sensors to ensure the accuracy of tracking and limit the tracking range. However, the cost of angle sensors is high and there is a risk of damage to photovoltaic modules and frames due to sensor failure; most wind-resistant designs use control systems and Wind speed sensors are connected to obtain wind speed information, which requires purchasing wind speed sensors and laying cables, which consumes a lot of manpower and material resources

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