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Design and Implementation of High Efficient Power Converter for Small PM Synchronous Wind Generator

Rezazadeh Sotudeh, Ghasem | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46676 (05)
  4. University: Sharif University Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Tahami, Farzad
  7. Abstract:
  8. The global wind energy capacity has been increased rapidly in the past few years and became the fastest developing renewable energy technology. Small Permanent Magnet Synchronous Generators (PMSG’s) are widely used in low power wind turbines because they don’t need a gearbox and complicated control systems. In order to inject the electrical power generated by PMSG to the grid, an AC-DC-AC power electronic converter is required. A novel low cost efficient AC-DC converter is proposed to obtain the maximum power per ampere of PMSG. The new structure for the rectifier stage of the AC/AC converter is based on a DCM operated SEPIC converter and can convert the variable voltage and frequency of PMSG output to the constant voltage and frequency of the grid.
    The proposed converter should have high efficiency, so PFC technique is used. A low cost feature has been reached by reducing the elements specially power semiconductor switches. This proposed DCM Sepic Rectifier can be categorized in Direct Three-Phase Rectifier set. In order to increase output voltage amplitude a three phase transformer can be used in circuit. In that case the magnetizing inductance of transformer acts as a resonant tank inductance. Principles of operation are presented and the closed-loop system has been investigated using simulation results for a 500W/100V prototype. This converter has then been implemented and the experimental results were presented
  9. Keywords:
  10. Power Electronic Converter ; Input Power Factor Correction ; Permanent Magnet Synchronous Generator (PMSG)Wind Turbine ; Power Factor Correction ; AC-AC Three Phase Converter ; Three Phase Sepic Rectifiers ; Three Phase Discontinous Conduction Model (DCM)Converter

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