


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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