光伏并网发电系统控制技术研究：最大功率点跟踪与电网电压控制-论文总结

Grid-Connected photovoltaic technology is a promising approach to efficiently utilize solar energy, a sustainable and clean source of power. Research in this field has gained significant attention as it represents a key trend in the development of renewable energy systems. This paper provides an analysis of the progress of grid-connected photovoltaic systems both domestically and internationally, focusing on the structure and operation principles of single-phase grid-connected photovoltaic systems. By evaluating the advantages and disadvantages of different control strategies, this study adopts the current tracking control and grid voltage feedforward control strategies to mathematically model the control system. A hardware circuit based on grid-connected photovoltaic systems is designed and developed, including the main circuit of the system, signal sampling and processing circuits, PWM and SPWM signal isolation and driving circuits, and power supply circuits. Detailed analyses of the operation processes of these circuits are conducted, parameters are calculated, and the hardware circuits are assembled, tested, and debugged. Furthermore, the principles and methods of Maximum Power Point Tracking (MPPT) control are explored, with the implementation of the conductance increment method to achieve maximum power point tracking of the photovoltaic array. This comprehensive study contributes to the advancement of grid-connected photovoltaic systems, optimizing the utilization of solar energy and promoting the development of sustainable energy solutions. Keywords: Solar energy, Grid-connected, PWM, MPPT.