Improved dual-SOGI control for three-phase unified power quality conditioner under distorted grid and load conditions

Multi‐objective control and operation of grid‐connected small hydro‐solar PV‐battery energy storage‐based distributed generation

“…During DC offset, many control algorithms like Kalman filter [21], intelligent adaptive neuro‐fuzzy inference, least mean square (LMS) and least mean forth [22] are not able to eliminate harmonics and their effect is reflected during FC extraction. During harmonic distortions or unbalancing conditions, many researchers have proposed second‐order generalised integrator (SOGI) [23]‐based bandpass filters or their modified versions like improved dual‐SOGI [24], dual‐SOGI [25], improved‐SOGI [26] and fourth‐order‐based FOGI [27] for extracting FC and to inject pure sinusoidal current into PCC. Moreover, the FOGI‐based BPF algorithm has the capability of removing the DC offset.…”