The Research Of Grid Side Converter In Permanent-Magnet Direct-Drive Wind Power System

Energy, is the material basis for the existence and development of the human society.Inrecent years, on the one hand, the energy shortage is worsening，on the other hand, theenvironmental issues caused by the excessive use of traditional fossil energy have alsothreatened the human living environment. Under the circumstances, how to obtain the cleanand renewable energy has become a hot topic of the contemporary electrical field, theenergy field and the environmental protection field.In recent years, with the development of power electronics technology, such as wind,solar, geothermal and other renewable energy development, utilization, from the smallcapacity of the special occasions, small-scale research stage transformation to integrated,large-scale large-capacity bulk power generation stage.The traditional technology used in the field of wind power is the excitation ofdoubly-fed wind power generation system by the wind turbine through the spindle, thegrowth gearbox driven doubly-fed excitation power generation system to generateelectricity. Compared to the direct drive wind power system, the mechanical structure of thedoubly-fed excitation power generation system in the growth rate of the gear box is easy towear and tear easy to overload components, resulting in post-maintenance inconvenience.With the wind power installed capacity increased year by year, the wind through the aspectsof the system reactive power compensation and low voltage requirements increasedaccordingly. The permanent magnet direct drive wind power system has its own uniqueadvantages in this regard.This paper to the permanent magnet direct drive wind power system network sideconverter as a research entry point, the system analyzes the basic structure of the permanentmagnet direct-drive line-side converter, the basic principle and the associated mathematicalmodel. And on this basis, the digital signal processor (DSP) TMS320F28335, the systemcontrol kernel, the basis of the model using sinusoidal pulse width debugging technology(SPWM), the direct drive permanent magnet wind power simulation system design and research, and network waveform perfect Harmony, power factor adjustable DC side andnetwork side of the two-way flow of energy, which verifies the rationality and feasibility ofthe basic principles and design.