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A control method to charge series connected ultra-electric double layer capacitors suitable for photovoltaic generation systems
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| Author(s) |
N. Mutoh; T. Inoue |
| Abstract |
A new combined control method suitable for photovoltaic (PV) generation systems is
described. The new method combines a maximum power point tracking (MPPT) control method to
make it possible to take the maximum power which solar arrays can generate at any time irrespective
of the weather and a control method to charge the maximum power by the MPPT control method to
series connected ultra-electric double layer capacitors (ultra-EDLCs) while maintaining the electric
capacity which solar arrays can generate at that time. The MPPT method controls the output current of
the solar arrays so that the output power converges on the maximum power in the prediction line
previously determined based on the linearity between the maximum output power and the optimization
current. The MPPT method is characterized by having the ability to enlarge the controllable range of
the output power to lower solar radiation in comparison with the conventional hill-climbing method.
The charging method controls the current and voltage so as to be charged at around the power generated at
that time while supervising the maximum voltage and allowable temperature of each series connected
EDLC. The combined control method makes it possible to charge with the maximum power generation
from solar arrays into ultra-EDLCs. Effectiveness of the methods is verified by simulations and
experiments. |
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| Filename: | EPE2003-PP1157 - Mutoh |
| Filesize: | 1.208 MB |
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| Type |
Members Only |
| Date |
Last modified 2004-02-03 by Unknown |
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