الفهرس 
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Abstract
Maximum power point tracking (MPPT) is a real problem in harvesting power of
photovoltaic (PV) solar cells. In this work Constant voltage method (CV) has been
used to get MPP. Unfortunately, to determine the reference maximum voltage in CV
method, the photovoltaic module should be regularly disconnected to measure the
open circuit voltage and calculate the new operating point; this causes power loosing
rather than time consuming. This research introduces a fully electronic system that
automatically generates a reference maximum voltage to extract the maximum power
point at any irradiation and temperature level. Unlike the approximated calculations
of reference values of traditional CV; the role of the proposed method is to generate
an expected operating voltage point over wide range of weather variations without
disconnecting the PV modules. Takagi-Sugeno (T-S) based fuzzy logic controller
has been utilized to calculate the voltage at maximum power point ( of the PV
module according to weather variations i.e. temperature and irradiance.