A new passive islanding detection method and its performance evaluation for multi-DG systems

Universal islanding detection technique based on rate of change of sequence components of currents for distributed generations

“…Passive islanding detection methods depend on parameters such as rate of change of frequency (ROCOF), ROCOF over power (d f /d p ), rate of change of voltage (ROCOV) and rate of change of impedance (ROCOI). Nevertheless, large non‐detection zone (NDZ), high susceptibility towards nuisance tripping and inability to detect island during perfect power balance situation are the several drawbacks of the schemes based on ROCOF and d f /d p [5–11]. At the same time, the scheme based on ROCOV is not able to distinguish islanding condition with non‐islanding events, particularly, when the reactive power mismatch is very small.…”

“…At the same time, the scheme based on ROCOV is not able to distinguish islanding condition with non‐islanding events, particularly, when the reactive power mismatch is very small. Afterwards, Mohammadzadeh Niaki and Afsharnia [11] presented empirical mode decomposition‐based islanding detection scheme. However, initiation of nuisance tripping in case of various non‐islanding events is the major shortcomings of the said scheme.…”

Islanding detection in distributed generation system using intrinsic time decomposition

“…Additionally, decomposition techniques like empirical mode decomposition (EMD) and Hilbert Huang transform (HHT) have been used in [20][21][22] to detect islanding. Although HHT is an improvised form of time-frequency resolution still it suffers from the issues like sensitivity to sampling frequency, noise and mode mixing problem.…”

Islanding detection technique based on inverse hyperbolic secant function

“…Passive, active and hybrid islanding detection techniques belongs to class of local methods. Conventional passive islanding detection techniques depend on measurement of appropriate parameters like frequency/rate of change of frequency (d f /d t ), rate of change of voltage, vector surge and rate of change of impedance (d z /d t ) and their modification with reference to appropriate threshold values [4–9]. However, these schemes have large NDZ during perfect power balance condition and are highly susceptible towards nuisance tripping.…”