Abstract
Current control logic plays a very important role in the overall performance of grid-connected inverters. Adaptive modified hysteresis current control is used in this work for switching loss reduction, optimization of inverter switching frequency, and reduction in total harmonic distortion of supply current. Photovoltaic-fed grid-connected inverter injects real power from photovoltaic array into the grid, controls real power flow in the grid, and functions as a shunt active filter. Good DC bus stabilization, reactive power compensation, satisfactory performance under unbalanced source and load conditions, and good dynamic response is also achieved.
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