PFEA111-20 3BSE028140R0020 of photovoltaic (PV) power generation technology has been intensively researched and promoted in foreign countries, and our country has basically matured technologically and has entered the stage of promotion and application [1]. However, solar energy has the problems of low density, intermittency, and constant changes in the direction and intensity of light over time, which puts forward higher requirements for solar energy collection and utilisation devices. Many current solar panel arrays are basically fixed, which cannot make full use of solar energy resources and have low power generation efficiency.

PFEA111-20 3BSE028140R0020 can always keep the solar panels and light perpendicular to maximise the solar energy received, then it can make full use of the abundant solar energy resources. According to experiments, in solar power generation, under the same conditions, the use of auto-tracking power generation equipment is required to increase power generation by about 35% compared to fixed power generation equipment. Therefore, the design and development of a control system that can automatically track solar light is a very valuable research topic.

PFEA111-20 3BSE028140R0020 is a new type of Programmable Logic Controller PLC (Programmable Logic Controller) sunlight auto-tracking system, which not only automatically adjusts the orientation of solar panels according to the direction of the sunlight, has a simple structure and is low-cost, but also automatically remembers and It not only can automatically adjust the orientation of solar panels according to the direction of sunlight, but also can automatically memorise and correct the coordinate position at different times during the tracking process without manual intervention, which is especially suitable for the situation of complicated weather changes and unattended operation.