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automated solar tracking system using plc ppt

Aiming at low density of solar energy, intermittent of solar ray, changing light intensity and direction with time, the paper studies maximum power point of photovoltaic module based on OMRON PLC. The system designed the hardware and software, and the hardware included PLC I/O configuration, the signal processing unit, the comparison circuit of photosensitive resistance for detecting ray strength, photovoltaic modules and switch power supply; and the software included PLC programs for monitoring, and PC programs for monitoring and handling data. The photovoltaic module in the system can track the sun simultaneously, then the maximum sun energy will be obtained, which has effectively improved the utilization ratio of solar energy and efficiency of photovoltaic power generation system, and has reduced the cost of grid-connected PV power generation with significances of theories research and application values of applications promotion.

In our daily life, the need of energy increases each and every day. The source of electricity is commonly from motor generators that is generate from the source of coal or other element of fuel. Another new way in this era is by using solar energy. The solar energy convert solar irradiation to power that can be used in common electric appliances. Since solar is a new type of source, the usage of the solar is still small compare to the old conventional ways. The solar energy is converted when the solar cells on the solar panel detects light irradiation. However, the angle of the sun is proportional to the energy converted. If the sun is 90° vertical to the solar panel, the energy received is maximum compare to other angles. In this case, a project is developed to track the solar during the movement of the sun from morning till night. The ASTS (Automated Solar Tracking System) is developed by moving the solar panel during anytime of the day that the sun is available and the motor will move the panel to a 90° vertical angle directly to the sun. The system is controlled by OMRON Programmable Logic Controller which will process data from the sensor and convert it to output for the motor movement. As the result, a prototype of Automated Solar Tracking System is operated and able to achieve the objective of this project.