Abstract:
HCC is a popular controller for grid-following inverter (GFI) systems because to its resilience, rapid reference tracking, improved dynamics, and ease of development compared to other controllers. HCC responds differently when integrated with solar PV.
Fast convergence and low converter losses are needed to transfer maximum power from PV to the grid in the PV-based GFI system. Thus, this study offers a modified double-band HCC (MDBHCC) with proportional resonant (PR) controller for single-phase PV integrated GFI systems with LCL-filters Using sequential logic and an adaptive clock, the approach reduces inverter switching losses using unipolar symmetrical PWM.
It increases the total harmonic distortion (THD) of the injected current into the grid at the point of common coupling and restricts HCC’s maximum switching frequency. The suggested MDBHCC with PR control runs at lower THD to improve power quality and achieve zero steady state error. Simulation and experimental results show a considerable drop in switching frequency and improved grid current harmonics at steady-state and dynamic circumstances.
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