Research On Photovoltaic Power Generation System Based On Solar Energy Automatic Tracking Technology

In order to solve the energy crisis and serious problems of traditional energy pollution,countries around the world are vigorously promoting and developing new energy industries.Solar energy has become a hot research object in the field of new energy because of its green and resource-rich advantages.And solar photovoltaic power generation has received widespread attention from various countries.However,due to the low photoelectric conversion rate of conventional stationary solar power generation devices,the overall system has low power generation efficiency.The theoretical analysis proves that the use of dual-axis solar automatic tracking technology to make the sun's rays always perpendicular to the solar panel can greatly increase the photoelectric conversion efficiency of solar energy and thus increase the utilization of solar energy.This paper aims to improve the efficiency of solar energy utilization,this dissertation studies a high-precision photoelectric detection sensor and combines a time control tracking mode and photoelectric control tracking mode to construct a dual-axis solar tracking system.The main research work of the dissertation is as follows:Based on the selection of suitable optoelectronic components,a high-precision cube-type photoelectric detection sensor is designed,and the important parameters such as the structure,composition principle,positioning principle and tracking method of the sensor are analyzed theoretically.The working principle and main performance parameters of the four-quadrant detector were analyzed.The position of the light spot detection system based on the four-quadrant detector was studied.The performance indexes and the main factors affecting the detection accuracy of the spot position were studied.Through the analysis of the comprehensive requirements of the solar tracking control system,taking the TMS320F28335 as the control core and the stepper motor as the executing agency,the overall design of the solar dual axis automatic tracking control system and the construction of the hardware platform were completed,and the solar tracking photoelectric detection sensor was completed.The module has conducted in-depth research.With CCS3.3 as the software design platform,the software control process is designed based on the tracking control system that has completed the construction of the dual axis solar tracking hardware module and the time control + light control.The software design flow mainly includes the following parts: the main program design of the control system,multi-channel signal acquisition,light control and time control subroutine design,and complete the system's experimental research and follow-up testing.The experimental results show that the designed photoelectric detection sensor module can accurately track the position of the sun.Using the optimized hybrid tracking control strategy not only reduces the system power consumption,but also improves the tracking accuracy.The system is stable and reliable.