Implementation of a DSP-controlled photovoltaic system with peakpower tracking
Chihchiang Hua
Jongrong Lin
Chihming Shen
Dept. of Electr. Eng, Nat. Yunlin Univ. of Sci. & Technol., Touliu City;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb 1998
Volume: 45,
Issue: 1
On page(s): 99-107
ISSN: 0278-0046
References Cited: 11
CODEN: ITIED6
INSPEC Accession Number: 5830869
Digital Object Identifier: 10.1109/41.661310
Current Version Published: 2002-08-06
Abstract
Photovoltaic systems normally use a maximum power point tracking
(MPPT) technique to continuously deliver the highest possible power to
the load when variations in the insulation and temperature occur. It
overcomes the problem of mismatch between the solar arrays and the given
load. A simple method of tracking the maximum power points (MPPs) and
forcing the system to operate close to these points is presented. The
principle of energy conservation is used to derive the large- and
small-signal model and transfer function. By using the proposed model,
the drawbacks of the state-space-averaging method can be overcome. The
TI320C25 digital signal processor (DSP) was used to implement the
proposed MPPT controller, which controls the DC/DC converter in the
photovoltaic system. Simulations and experimental results show excellent
performance
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