Inverter Circuit Design Simulation And Implementation For Small Scale Distributed Wind Power Grid Single-phase Access

Wind power now has become the research hotspot in the field of renewable energy use, how to convert wind energy into the electric energy to power is the focus of research. This paper mainly small single-phase grid-connected wind power generation system as the research object, the system topology structure, control strategy are analyzed and researched in detail, on the basis of this design based on the single-chip C8051F4101kW single-phase grid-connected wind power inverter.This system includes two parts, namely the level before and after the boost level grid connected inverter part. The small wind generator of variable voltage variable frequency AC storage battery, after Boost booster link to DC voltage to DC voltage increased, finally through the grid-connected inverter control link to get real-time tracking voltage stabilized AC.This article has first analyzed the Boost booster circuit and voltage single-phase full bridge inverter circuit working principle, at the same time to boost, inverter circuit parameters are discussed in theory and calculation. Grid connected inverter with current tracking control, through the software phase locked loop technology acquisition grid current to be synchronous with the power system voltage sine wave value, and given amplitude are multiplied to obtain the reference current signal and the output current of the inverter, the sampling value, through the digital PI control strategy, to eliminate electric disturbance on grid-connected current effect, in order to improve the performance of the system.At the same time, the use of MATLAB/Simulink built the simulation model of the system, each part of the system to make simulation analysis, the results show that the system is feasible. In addition, in order to improve the real-time performance of control system, the Hualong company production of chip C8051F410as the core control unit completed acquisition, control algorithm, real-time SPWM waveform generation tasks. According to the overall design of the system requirements, the development of small single-phase grid-connected wind turbine prototype, and conducted an experimental study. The results show that, the system is stable and reliable, achieve the expected design target.