Research Of Photovoltaic Power Generation Controller Basing On Embedded Chips

With the social and economic development, energy and environment as important issues facing the world. The energy shortages and environmental degradation increase prominently. To solve the energy crisis in the world and the environmental degradation, the most effective way is the development and utilization of green energy. With its rich solar energy resources, clean pollution-free, Solar Energy as the prospect of better utilization of renewable energy. Photovoltaic power generation technology as the main form of photovoltaic power generation has received much recognition and attention, and gradually becomes the mainstream photovoltaic applications. According to Photovoltaic System requirements for maximum power conversion, In-depth analysis and power generation systems based on the photovoltaic system requirements for maximum power conversion, the paper design with maximum power tracking of PV grid controller, aimed at maximum use of solar energy resources.The principle and relevant technology of solar photovoltaic power generation are introduced and analyzed, and PV system structure are mainly addressed. The design consists of DC-DC Boost converter and a Voltage source inverter.According to the working principle of solar cells and working characteristics, in-depth analysis of the solar battery equivalent circuit and mathematical model. Aiming at the disadvantage of low convergence speed and local minimum of neural networks algorithm used in the solar cell maximum power point tracking (MPPT), an effective neural network algorithm based on genetic algorithm (GA) is proposed to realize the MPPT control in this paper. Simulation with MATLAB is carried out on the system. The simulation results show that algorithm has better generalization capabilities than the experiential formula. Be able to complete the conversion for solar energy to electrical energy accurately, to achieve the most efficient use of solar energy resources. In order to verify the accuracy and superiority of the algorithm, a solar photovoltaic power system with dsPIC33F128 is designed and implemented in this paper. Focused on the design of the photovoltaic inverter circuit, Voltage and current sampling circuit, IGBT drive circuit, the serial communication circuit module and so on. Simulation experiment shows that the controller can satisfy the design requests, this system works safely and stably.