A Fuzzy Controlled Dual Output Photovoltaic System.

This paper proposes a circuit that is capable of generating both dc as well as single phase ac from photovoltaic cells. The n ovelty of this system is that it makes use of fuzzy logic in order to obtain the desired voltage value. The ac voltage has to be used up immediately since it cannot be stored. When this ac voltage is not required, the dc voltage generated by the PV cells is regulated and stored in a battery which can be used as per the requirement. The ac voltage is generated by making use of a nine level cascaded H-Bridge type of multilevel inverter. Dc voltage generated from the solar panels is supplied to a buck-boost converter that uses buck or a boost operation in order to obtain the desired voltage level to be fed into the battery. The fuzzy logic controller is used for determining the duty cycle which defines the mode of operation of the convert er. The circuits have been simulated in MATLAB Simulink and their control schemes have been analyzed and validated.