High power quality maximum power point tracking-based islanding detection method for grid-connected photovoltaic systems

• High power quality MPPT based-islanding detection method is presented. Accurate islanding within the 137 ms observed. Acceptable total demand distortion and harmonic spectra are met in compliance with existing standards under various penetrations. The efficiency drops by 0.52% whilst disturbance stimulated once a minut. Islanding condition when distributed generators (DGs) disconnected electrically from upstream network. This unwanted situation should be detected effectively to ensure safety of maintenance staffs (PQ) requirements. paper presents new high PQ maximum point tracking (MPPT)-based methodology for detecting operating mode grid-connected photovoltaic systems (GCPVSs). In recommended two-level scheme, injected into algorithm suspicious conditions, recognized passive criterion. declines DG active output remarkably, drifting voltage beyond minimum standard set state while its impact negligible at network presence. effectiveness proposed technique has been evaluated through several hardware-in-the-loop simulations case study system, containing two plant GCPVSs equipped pair multi-functional relays. results highlight precise classification small non-detection zone. Moreover, analyses indicate acceptable current Since presented scheme diminishes events, influence on GCPVS studied as well. outputs underline that every minute time. It finally concluded provides reliable well insignificant degradation efficiency.