Zero power mismatch islanding detection algorithm for hybrid distributed generating system

Distributed generation is essential for both keeping up with the rising power demand and
reducing the amount of money spent on fossil fuels. There is widespread agreement that the world
should prioritize the development of renewable energy systems such as wind and solar energy. This study
describes the design and utility-grid integration of a hybrid distributed generating system that utilizes
photovoltaic and wind-driven permanent magnet synchronous generators (hybrid PMSG-PV systems). To
prevent damage to the grid, hybrid distributed generation systems, consumer devices, and line workers
must be protected from islanding. Detection of islanding in hybrid DG systems has been suggested using
passive islanding and time-spectral analysis. Measuring and amplifying the ripple content present in
voltage at point of common coupling (PCC) about 0.4 seconds after the permissible delay time after the
circuit breaker opens on the utility grid side is how islanding is discovered using this method. Compared
to other methods, the proposed method has smoother islanding detection waveforms owing to increases
in both the window size and threshold limit. The suggested method detects islanding in 40 ms and is
verified in a variety of non-islanding scenarios, such as fault occurrence, parallel feeder loss, and load
shift. In addition, the cost is reduced, the response time is rapid, and there is no non-detection zone (NDZ)
when using these methods. Unlike active islanding detection methods, their function is unaffected by the
size, quantity, or type of distributed generators linked to the utility grid; hence, there are no power quality
concerns.