Prototype super-capacitor photovoltaic streetlight with xLogic SuperRelay functionality
Abstract
In this paper, the authors present and discuss the
design of a prototype super-capacitor photovoltaic (PV)
streetlight with xLogic SuperRelay (PLC) functionality.
Deep-cycle batteries used in solar electrical systems, generally
have low efficiencies, long charging times, are temperature
sensitive and have a limited amount of charging and
discharging cycles. This paper evaluated the effect of
super-capacitors as an energy source for a PV streetlight in
South Africa. An xLogic SuperRelay (PLC) is used to control
the charging and discharging profiles of the super-capacitors
and deep-cycle batteries. The following three design topologies
are evaluated and presented: 1) deep-cycle batteries as an
energy source, 2) super-capacitors as an energy source, 3)
combination deep-cycle batteries and super-capacitors as an
energy source. The experimental results obtained show that the
deep-cycle batteries provide a constant supply to the load,
while the super-capacitors charge and discharge with a linear
curve. The results show that it is too expensive to replace
deep-cycle batteries with super-capacitors, but a combination
provides the most energy efficient solution
URI
http://hdl.handle.net/10394/18098http://www.iret.co.in/Docs/IJETEE/Volume%207/Issue1/7.%20Prototype%20Super-capacitor%20Photovoltaic%20Streetlight%20with%20xLogic%20SuperRelay%20Functionality.pdf
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