A photovoltaic tracking bracket start-stop control method and photovoltaic tracking system

Abstract

The application discloses a start-stop control method of a photovoltaic tracking support and a photovoltaic tracking system, so as to reduce the damage probability of a rotating mechanism, a photovoltaic module and a photovoltaic tracking support. The photovoltaic module, the attitude sensor and the photovoltaic tracking bracket in the photovoltaic tracking system always maintain the same attitude. The method includes: using the attitude sensor to obtain the inclination angle θ of the photovoltaic module in the east-west direction 1 and the rotational acceleration a in the east-west direction 1 ; Judging whether θ is satisfied 1 ‑θ lim1 ≤θ th or theta 1 ‑θ opt1 ≤θ th ; θ lim1 , θ opt1 Respectively, the limit angle and the expected angle of the photovoltaic module in the east-west direction, θ th Set a threshold for one; if yes, send a stop command to the east-west rotation mechanism; if not, judge whether a is satisfied 1 ≥0, if a 1 ≥0, send a running command to the east-west rotating mechanism, if a 1 <0, send a stop command to the east-west rotation mechanism and report a fault.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, and more specifically, to a method for controlling the start and stop of a photovoltaic tracking support and a photovoltaic tracking system. Background technique [0002] The power generation efficiency of the photovoltaic module is related to the angle of the sun's rays. When the sun's rays are vertically irradiated on the plane of the photovoltaic module, the amount of solar radiation received by the photovoltaic module is the largest, and its power generation efficiency is the highest. [0003] The photovoltaic tracking system can automatically track the position of the sun, and adjust the inclination angle of the photovoltaic module in real time by rotating the photovoltaic tracking bracket (that is, the bracket used to place the photovoltaic module), so as to ensure that the sun's rays shine vertically on the plane of the photovoltaic module. Photovoltaic tracking syste...

AI Technical Summary

Problems solved by technology

However, when the photovoltaic module encounters obstacles during its rotation in the east-west direction and it is difficult to maintain normal rotation, the control unit will not rotate to the east-west direction because the photovoltaic module has not yet rotated to the desired angle or limit angle in the east-west direction The mechanism issues a stop command, and the east-west rotation mechanism continues to work under this condition, which may cause damage to the east-west rotation mechanism, photovoltaic modules and photovoltaic tracking brackets

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