Abstract
This paper presents a competent single-phase single-stage grid-tied photovoltaic (PV) power conditioning system (SSGPS) integrated with maximum power point tracking (MPPT) and closed-loop current control scheme. The shortcoming of the conventional MPPT technique to track global power under varying environmental conditions is addressed by developing a simple and efficient current reference control (CRC) based MPPT technique. The CRC MPPT technique enables faster tracking of the global maximum power and the current controller injects pure sinusoidal current into the grid at unity power factor under transient conditions. PWM pulses for the inverter are generated using Hysteresis band controller (HBC). The viability of the control scheme for the SSGPS is validated with simulation and experimental analysis under dynamic test conditions. A real time implementation of the proposed system is carried out in National instruments (NI) LabVIEW environment.
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