UD ELEG 620 - Photovoltaic Modules (46 pages)

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Photovoltaic Modules



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Photovoltaic Modules

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Pages:
46
School:
University of Delaware
Course:
Eleg 620 - Solar Electric Systems

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Photovoltaic Modules ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Photovoltaic Modules We have seen previously seen the behaviour and design of solar cells in isolation In practice they are connected together and packaged as a module to provide specific power output and to protect the solar cells from the elements We will look in more detail at the following issues Connection of solar cells and mismatch between Packaging of modules Failure modes for modules ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Connecting solar cells We need to understand how the different connections between solar cells affect performance and most critically what happens when solar cell performance is mismatched We will look at whether the solar cells are connected in Series give greater voltage Parallel gives greater current Mismatch between solar cells must be taken into account when designing a module how is this done How do we construct a module that will be relatively cheap but also provides good reliable power ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Connecting Solar Cells Series connection increases voltage Parallel connection increases current This is for identical solar cells what happens when they are not identical depends on the connection ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Connecting Solar Cells What a solar cell does depends on it s bias condition ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Solar Cells in Series Simplest thing to consider is when we have two identical solar cells connected in series Since the cells are in series the currents will be matched not a problem as they are identical voltages will add Useful for when we want a specific voltage typical voltages for a single solar cell will be 0 6 V ELEG620 Solar Electric Systems University of Delaware ECE Spring 2009 S Bremner Solar



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