Volume 20 No 20 (2022)
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FOPID BASED CONTROL STRATEGY FOR HARMONIC COMPENSATION IN SINGLE-PHASE SOLAR INVERTERS
GULLA AKHIL KUMAR , A. NAVEEN KUMAR , DR.T. ANIL KUMAR
Abstract
Due to the widespread usage of power inverters to connect solar and wind power facilities, power systems are increasingly exposed to current and voltage harmonics. However, harmonic compensation can also be accomplished using these inverters. The control tuning is difficult and less flexible in traditional harmonic detection systems, which extract all harmonic current information. Current dynamic saturation approaches are presented in this study as a means of limiting the maximum current output of multifunctional solar inverters when compensating for nonlinear loads with harmonics. A closed loop is used in one method, whereas an open loop is used in the other. As a result, in multifunctional single-phase solar inverters, this work presents a closed loop with Fractional Order PID (FOPID) control approach. Harmonic load currents are detected using a unique approach. To detect higheramplitude load harmonic current, a frequency-based approach has been developed. Using a FOPID controller, the total harmonic distortion of the grid current is reduced. The proposed control technique is shown to be effective in reducing grid current distortion through simulation
Keywords
Photovoltaic (PV), Multifunctional Inverters, Fractional Order PID (FOPID), total harmonic distortion (THD
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