A new efficient technique for disturbing current extraction to improve the grid current quality in a three-phase grid connected PV system supplying a non-linear load

Provision of ancillary services in a grid‐connected photovoltaic distributed energy resource

“…The methods employed in [2][3][4][5][6] require measuring both the load and converter (or grid) currents. Khomsi et al [2] proposed a harmonic-detection method using the fast Fourier transform (FFT), however, this technique requires at least one cycle delay to detect the harmonics. To reduce the time of detection, the harmonic detection proposed by Belaidi et al [3] was based on synchronous dq reference frame along with a low-pass filter (LPF) for extracting the load-current harmonics.…”

“…Khomsi et al. [2] proposed a harmonic‐detection method using the fast Fourier transform (FFT), however, this technique requires at least one cycle delay to detect the harmonics. To reduce the time of detection, the harmonic detection proposed by Belaidi et al.…”

“…The methods employed in [2–6] require measuring both the load and converter (or grid) currents. Khomsi et al.…”

“…Several papers have been published on DER and AS application in recent years [2][3][4][5][6][7][8][9][10][11][12][13], with different methods for power generation and harmonic detection [1]. Generally, the generated power control can be based on dc-link regulation along with the maximum power point tracking or with load power, while the harmonic detection can be performed from load currents, grid currents or estimated by PCC voltages.…”

“…The methods employed in [2][3][4][5][6] require measuring both the load and converter (or grid) currents. Khomsi et al [2] proposed a harmonic-detection method using the fast Fourier transform (FFT), however, this technique requires at least one cycle delay to detect the harmonics.…”