A Photo-Voltaic System Voltage Controller with Battery Storage for Independent Uses

The research develops a brand-new voltage regulator system for stand-alone photovoltaic installations incorporating battery storage elements.The PV array output experiences fluctuations based on weather factors which result in uncontrolled DC power.The DC-DC converter tracks the maximum power output based on temperature measurements along with the received irradiance levels.The maximum power point tracking (MPPT) requires the perturbation and observes algorithm for its operation.The algorithm provided outstanding performance despite conditions which affected parameters.The system receives its steady state energy from the solar cell array but maintains its dynamic energy through the battery.The control strategy maintains the system efficiency by directing SEPIC converter and bi-direction DCDC converter operation through pre-programmed modes based on the state of the battery and solar cell power supply.There exists an inverter that changes DC-DC converter outputs into AC voltage.The frequency together with the voltage regulation allows control of the AC output.The inverter voltage control uses unipolar sine wave pulse width modulation (SPWM) in a closed loop fashion.The controlled AC voltage is delivered to both grid integration systems and AC independent loads.The entire system development occurs through design and validation using MATLABSIMULINK.AC standalone load simulations demonstrate that the MPPT algorithm along with control strategy and voltage controller using SPWM approach operate effectively for the inverter.