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Maximum power point tracking (MPPT) is a real problem in harvesting power of photovoltaic (PV) solar cells. 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 paper introduces a fully electronic system that automatically generates a reference maximum voltage which allows the PV modules to produce all the power they are capable of. Unlike the approximated calculations of reference values of traditional CV; the charge of this accurate reference-generator is to generate an expected operating point over wide range of weather variations without disconnecting the PV modules. A T-S based fuzzy logic controller has been utilized to calculate the maximum operating voltage ( of the PV module according to weather variations i.e. temperature and irradiation.

Maximum Power Point Tracking Using Fuzzy Logic Control in Constant Voltage for Different Environmental Conditions