Notes - Chapter 12 Summary

The following notes are taken from Wind Turbine Technology by Ahmad Hemami.

• Transformer is a necessary electrical device for any wind turbine
• steps up the voltage from generator to the collector for the grid
• Transformers either step up or step down voltage and are called as such
• If transformer is not used to change voltage, it is used to protect a device and is called an isolation transformer
• Ideal transformer is used for calculations, assumes no losses so output power equals input power
• turns ratio
• ratio of windings between winding 1 and winding 2
• Autotransformer has only one winding for input and output, tapped for electricity at variable location
• pad-mount transformer is mounted on flat surfaces, pole mount on poles
• Rectifiers convert AC to DC
• bridge rectifier, single phase or three phase
• low power uses diodes
• Ripples in DC is the fluctuation of voltage about a nominal value instead of being constant
• Inverters provide AC voltage from DC source
• Thyristor is a component used in rectifiers and inverters used for switching

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