Short-current pulse-based maximum-power-point tracking method formultiple photovoltaic-and-converter module system
Noguchi, T.
Togashi, S.
Nakamoto, R.
Dept. of Electr. & Electron. Syst. Eng., Nagaoka Univ. of Technol.;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Feb 2002
Volume: 49,
Issue: 1
On page(s): 217-223
ISSN: 0278-0046
References Cited: 8
CODEN: ITIED6
INSPEC Accession Number: 7177979
Digital Object Identifier: 10.1109/41.982265
Current Version Published: 2002-08-07
Abstract
This paper proposes a novel maximum-power-point tracking (MPPT)
method with a simple algorithm for photovoltaic (PV) power generation
systems. The method is based on use of a short-current pulse of the PV
to determine an optimum operating current where the maximum output power
can be obtained and completely differs from conventional
hill-climbing-based methods. In the proposed system, the optimum
operating current is instantaneously determined simply by taking a
product of the short-current pulse amplitude and a parameter k because
the optimum operating current is exactly proportional to the short
current under various conditions of illuminance and temperature. Also,
the system offers an identification capability of k by means of fast
power-versus-current curve scanning, which makes the short-current
pulse-based MPPT method adaptive to disturbances such as shades
partially covering the PV panels and surface contamination. The above
adaptive MPPT algorithm has been introduced into a current-controlled
boost chopper and a multiple power converter system composed of
PV-and-chopper modules. Various operating characteristics have
experimentally been examined on this multiple PV-and-chopper module
system from a practical viewpoint and excellent MPPT performance has
been confirmed through the tests
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