Control System Of Intelligent LED Streetlight Using Solar Energy

Control system of intelligent LED streetlight using solar energy is an independent operation, and feedback running status all the time of the streetlight system. It was made of seven parts:solar panels, lead-acid batteries, LED streetlight, charging circuit and discharge circuit(LED streetlight driver), MCU controller, and network communication.In the control system of intelligent LED streetlight using solar energy, the output voltage of the solar battery has big influence on the battery’s life.If the charging method is not appropriate, it will damage the battery easily, so as to improve the cost of solar streetlight,and it will hinder the wide application of solar streetlight.The purpose of this thesis is designing a control system of intelligent LED streetlight using solar energy based on ATmegal6 single chip microcomputer. The control system not only has the function of intelligent LED streetlight, at the same time also have the functions of remote monitoring and management. The design process of the system can be mainly divided into four parts:the designing of the system algorithm, the designing of the software and hardware of ATmegal6 MCU,the designing of charging circuit and discharge circuit, and the designing of remote monitoring.The system’s algorithm design includes two parts:the algorithm design of the solar battery’s maximum power point tracking.The research succeeds to design a fast and easily available maximum power point tracking algorithm through the lucubrate research of solar battery’s output characteristic and the combination of the fuzzy control theory.The algorithm design of battery charging.Combining with the solar battery’s maximum power point tracking algorithm and the storage battery’s output and input characteristic,the research designs a three stops charging algorithm which has the function of temperature compensation.It not only guarantee the charging efficiency, also played the protection of lead-acid batteries.The design of the controller mainly realize the function of maximum power point tracking, intelligent defensive in any situation,the defensive of storage battery’s charging and discharging and the design of near-end upper computer and the programming design of upper computer.The design of communications mainly to complete the remote computer monitoring function, mainly including computer program development and the design of the communication network. The communication between computer remote monitoring system and every streetlight through the Ethernet and wireless network.