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The principle of photovoltaic power generation is that solar cell components absorb solar radiation and convert solar energy into electric energy output, and the output electric energy is proportional to the solar radiation absorbed by solar cell components. When the solar cell components are perpendicular to the incidence Angle of sunlight, the solar radiation absorbed is the largest and the power generation efficiency is the highest. The form of photovoltaic power generation can be divided into fixed type and tracking type. The tracking type photovoltaic power generation is the way to obtain higher power generation, and the cost of the tracking system can be greatly reduced by optimizing the mechanical structure design, making it far more competitive than the fixed type photovoltaic power generation.
The control system of the common tracking device in the tracking photovoltaic power generation is mainly divided into: light intensity tracking mode, time Angle tracking mode, user program tracking mode; The tracking bracket is mainly divided into uniaxial tracking and biaxial tracking.
Light intensity tracking way: mainly adopts closed loop control, dolly strong light sensors to detect the sun's rays and incidence Angle deviation, solar energy battery components surface when the deviation exceeds setting threshold, driven by motor mechanical rotation to reduce bias light, until the sun light and solar cell component perpendicular to the plane to implement the solar altitude Angle and azimuth of the track. According to the precision and type of the light intensity sensor, it can be applied to the photovoltaic power generation system in the form of single axis tracking and double axis tracking.
