Wind Turbine Generator Power Inverter Technology Research And Device Development

In this paper, Zhejiang Provincial Natural Science Foundation of China (Y1080843) and Jiaxing Municipal Science and Technology Program (2008AY2024) "high-performance grid-based variable pitch wind turbine generator (5KW) the development of" distributed generation systems and describes the reverse grid change the relevant technical indicators and the current relevant research. Summarizes the various distributed power generation systems and inverter circuit, uses high-frequency single-phase full-bridge circuit topology as the primary circuit. Establish a wind turbine control system in the main parts of the mathematical model, analysis indicates that the dead zone control, and the rectifier load, inverter output waveform distortion caused by the main reason.On the Basis, the introduction of inverter control in the frequency of PI control and phase-locked with a combination of control theory, using a digital real-time control, and simulation. Given the grid inverter controldiagram for the effective utilization of wind energy to improve, through the composition of permanent magnet synchronous generators and small wind power generation system SEPIC (single ended primary inductor converter) DC-DC converter circuit analysis Wind energy presents a maximum for the control method by controlling the output voltage of the new DC generator indirectly control the wind turbine mechanical, the wind turbine at the rated speed with the optimum tip speed than running, automatically track the maximum power point.Meanwhile, in the design of wind turbine inverters, based on this paper, a small wind turbine control system technology and research summary of the system. Paper covers three aspects: Device parameters of inverter and related computational design simulation, control, chip select, algorithm simulation, emulation and softwaredevelopment and experimental validation.Finally, to achieve the operating results of the verification. 5kW wind turbine using a digital control based on TMS320LF28027DSP grid inverter experiments show that PI control than conventional control has the effect of frequency control can be relatively low switching frequency to obtain fast dynamic response and improve grid system efficiency; improve the system robustness; effectively reduce the output harmonic current Paper to verify the development of small wind inverter control system feasibility and effectiveness.