December 2017
Intermediate to advanced
293 pages
7h 2m
English
Content preview from Distributed Photovoltaic Grid Transformers
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Eddy Current and Stray Loss Calculations of Distributed Photovoltaic Grid Power Transformer
Eddy current losses (ECLs) and stray losses are present in every transformer. The primary stray and eddy losses are due to the 60 Hz frequency currents and related thickness of the conductor thickness of the windings. These loss components increase with the square of the frequency and square of the magnitude of the eddy currents. If the inverter feeding the power into the step-up transformer is producing more than the standard level of harmonics, then the stray and eddy losses will increase. The increase in load loss effect on efficiency is not typically a concern. Of much greater concern is the increased hot-spot temperature in the windings that ...
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