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Performance Analysis of Adaptive Hysteresis Current Controlled Inverter for Solar Power Applications
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Inverters are used in solar photovoltaic (PV) system to convert the D.C power produced by the solar photovoltaic cell into AC. This paper presents a novel Adaptive Hysteresis Current Controller to control the inverter used in the solar photovoltaic system. The proposed controller is capable of reducing the total harmonic distortion and to provide constant switching frequency. The mathematical model of Photovoltaic array is developed using Newton’s method. The modeled Photovoltaic array is interfaced with DC-DC boost converter, AC-DC inverter and load. A DC-DC boost converter is used to step up the input DC voltage, the inverter converts the DC voltage into AC. The inverter is controlled by the proposed current controller. The performance of the proposed controller is evaluated through MATLAB/Simulation. The results obtained with the proposed algorithm are compared with those obtained when using conventional fixed hysteresis current controller in terms of THD and switching frequency.
Keywords
Photovoltaic Cell, Adaptive Hysteresis Controller, Boost Converter, Inverter.
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