Short-current pulse-based maximum-power-point tracking method formultiple photovoltaic-and-converter module system
Noguchi, T.; Togashi, S.; Nakamoto, R.
Industrial Electronics, IEEE Transactions on
Volume 49, Issue 1, Feb 2002 Page(s):217 - 223
Digital Object Identifier 10.1109/41.982265
Summary: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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