Ressearch On Single-Phase Sine Wave Inverter For Small Wind Power

Wind energy is one of the most important renewable energy, wind power for improving energy structure and promoting the development of environment has important significance. In relatively scattered population lives and wind resource rich in remote areas, small wind power generation system has the characteristics of small investment and application of flexible, very suitable for solving the problem of power supply, has broad market prospects. Inverter is an important part of the small wind power generation system and it takes to convert DC to AC load power supply for the task. Due to the stochastic volatility of wind speed, make the inverter in the small wind power generation system in complex working condition. Conventional small wind power generation system of inverter power frequency trans former is often used to make the volume and weight of the inverter larger, and low working efficiency of inverter. In addition, the output of the inverter is almost a square wave, so it is not suitable for the use of some equipment. In order to improve the quality of small wind power sine wave inverter power supply, inverter efficiency in this paper, the single phase sine wave inverter topology and control method were studied.Small wind power generation system is firstly analyzed the characteristics of the single-phase sine wave inverter in the work, puts forward adopting two-stage inverter topology structure. Fonner level by indirect DC voltage step-up DC/DC conversion, the latter adopts full bridge inverter topology, fonner level using PWM control method at the same time, after the SPWM control method was adopted to realize. Secondly, put forward two kinds of single-phase sine wave inverter control methods. Method 1 uses a specific harmonic elimination method of SPWM control. Method 2 uses genetic algorithm to optimize the BP neural network control method. Under the environment of MATLAB simulation, simulation results show that the proposed method can effectively control single-phase sine wave inverter. Finally, the small wind power with single-phase sine wave inverter is designed. The system is controlled by C8051F410 microcontroller. The control program is designed and practical performance is tested. The results show that the design of hardware circuit can produce sine waveform.