Study Of The Schedulability Type Photovoltaic Power Generation System

As the scarcity of the world energy situation, the solar energy has caused world-wide attention in many countries. Photovoltaic power generation system will become a top priority to solve the energy shortage problem in the future. This paper mainly focuses on the structure of Schedulability-type photovoltaic power generation system-. DC-DC conversion,maximum Power Point Tracking MPPT control scheme,DC-AC inverter control strategy and Islanding detection scheme.In order to improve the efficiency of photovoltaic power generation system, this article focuses on the research of PV array maximum power point tracking. After analyzing the advantages and disadvantages of Disturbance observer method and Hysteresis comparison method, we finally adopt the method based on hysteresis combined with the BOOST converter control scheme. To C8051F360MCU as the core, through hardware design and software development, demonstrated the feasibility of achieving MPPT control and the maximum power point tracking system simulation analysis with the Matlab7.1 simulation software. Grid-connected PV inverter system has been studied and proposed the design of the photovoltaic power generation system based on BOOST convert circuit and full-bridge DC-AC inverter circuit.We study the PI regulator and the grid voltage feed-forward combination of current tracking mode.Simulation results show that single-phase PV grid system and network can track the current real-time grid voltage, and the simulation waveform is well.At last, grid-connected PV system in the presence of island effects have been studied and demonstrated the feasibility of over, under voltage detection scheme in anti-islanding.