Photovoltaic System: Case Studies, Bizon N.,Blabjerg F.,Tabatabaei N.M.,Kurt E., Editör, Springer, London/Berlin , Zürich, ss.235-260, 2017
Solar energy is one of the most important energy, which is environmentally
friendly such as clean, inexhaustible and free, among the renewable
energy sources. Studies on solar photovoltaic (PV) energy generation system were
promoted in last two decades. The main application of PV systems are in
stand-alone (water pumping, lighting, electrical vehicle, etc.), hybrid and
grid-connected (PV power plants) configuration. Stand-alone PV power generation
system is considered as good alternative for places that are far from conventional
power generation/transmission/distribution system. PV generation systems have
two big problems; PV conversion efficiency is very low and PV electricity generation
is effected from changing of weather condition. PV output varies periodically
in a year and in a day, and is not stable due to environmental condition.
Accordingly, in order to increase PV output and PV efficiency, it is crucial to
analyze PV output considering solar radiation, temperature, wind speed, shadow,
etc. Maximum power point trackers (MPPTs) are employed for extracting power
from photovoltaic (PV) panels. MPPTs enforce the solar modules to operate at
maximum power point (MPP) under the fluctuations of ambient conditions.
Therefore, they take a vital role for increasing of PV system efficiency. In this part,
the case studies of MPPT system, which includes stand-alone and hybrid PV
systems, will be briefly reviewed, followed by discussion of the MPPT modeling,
design, etc. Several stand-alone and hybrid MPPT application will be presented.
Latest developments in MPPT methods will be summarized. Finally some of the
present challenges facing the MPPT techniques will be explored.