A new approach to islanding detection of dispersed generators with self-commutated static power converters

A New Method for Islanding Detection of Inverter-Based Distributed Generation Using DC-Link Voltage Control

“…In this case, the amount of frequency or voltage deviation will not be sufficient to trigger the islanding detection system [4]. Several passive islanding detection methods are available, such as undervoltage/overvoltage [6], [7]; underfrequency/overfrequency [6], [7]; rate of change of active power [8], [9]; rate of change of frequency (ROCOF) [7], [10]; and [11] rate of change of frequency over power [12], voltage and power factor changes [13], phase jump detection [14], and voltage unbalance and total harmonic distortion [15], [16]. Passive islanding detection methods suffer from large nondetection zones (NDZs) [3], [4].…”

Application of Duffing Oscillators for Passive Islanding Detection of Inverter-Based Distributed Generation Units

“…Passive islanding detection methods mostly suffer from large NDZs [8], [9]. Several passive islanding detection methods are available like: undervoltage/overvoltage protection (UVP/OVP) and underfrequency/overfrequency protection (UFP/OFP) [9]; rate of change of active power [10], [11]; rate of change of frequency (ROCOF) [12], [13]; rate of change of frequency over power [14]; voltage and power factor changes [15]; phase jump detection [16]; as well as voltage unbalance and total harmonic distortion [17]. Unlike passive islanding detection methods, active islanding detection schemes make a perturbation into the voltage-source converter (VSC) output current by injecting an active signal in order to cut off the power balance between DG and local load consumption [18].…”

A Support Vector Machine Based Technique for Fault Detection in A Power Distribution Integrated System with Renewable Energy Distributed Generation

“…In [12], a method base on voltage imbalances and third harmonic distortion (THD) was used to determine the faulty section for an integrated power system network. The passive methods including frequency variations [13,14], degree of alteration of power frequency [15], power and voltage variation ASTESJ ISSN: 2415-6698 [16], energy mismatch and harmonic content recognition [17] and the degree of variation of reactive power [18], these techniques were applied in power grid integrated network for fault diagnostic. Moreover, undetected faults have an undesirable effect on the overall performance of the power grid, the active algorithms used for fault diagnostic includes frequency signal injection [19], singular and dual harmonic current injection [20,21], output power variation [22], reactive power control [23,24], and the impedance measurement method [25,26], these methods were used to detect faults in power grid integrated network with REDGs.…”