Residential photovoltaic energy storage system
Chiang, S.J.; Chang, K.T.; Yen, C.Y.
Industrial Electronics, IEEE Transactions on
Volume 45, Issue 3, Jun 1998 Page(s):385 - 394
Digital Object Identifier 10.1109/41.678996
Summary:This paper introduces a residential photovoltaic (PV) energy
storage system, in which the PV power is controlled by a DC-DC power
converter and transferred to a small battery energy storage system
(BESS). For managing the power, a pattern of daily operation considering
the load characteristic of the homeowner, the generation characteristic
of the PV power, and the power-leveling demand of the electric utility
is prescribed. The system looks up the pattern to select the operation
mode, so that powers from the PV array, the batteries and the utility
are utilized in a cost-effective manner. As for the control of the
system, a novel control technique for the maximum power-point tracking
(MPPT) of the PV array is proposed, in which the state-averaged model of
the DC-DC power converter, including the dynamic model of the PV array,
is derived. Accordingly, a high-performance discrete MPPT controller
that tracks the maximum power point with zero-slope regulation and
current-mode control is presented. With proposed arrangements on the
control of the BESS and the current-to-power scaling factor setting, the
DC-DC power converter is capable of combining with the BESS for
performing the functions of power conditioning and active power
filtering. An experimental 600 W system is implemented, and some
simulation and experimental results are provided to demonstrate the
effectiveness of the proposed system
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