A Novel Hybrid Islanding Detection Technique Using Rate of Voltage Change and Capacitor Tap Switching

A Review of Active Management for Distribution Networks: Current Status and Future Development Trends

“…It is a situation that a DN or a portion of the DN has been isolated from the main power grid, but it is continually supplied by the DGs within it [80]. Such a situation may threaten the safety of line workers, cause distorted voltage and frequency, and lead to unwanted out-of-phase reclosing of the DGs [81,82]. To detect the islanding, a remote (centralized) strategy will have to rely on communication [83] and an advanced monitoring system, such as SCADA [84].…”

Impact of Distribuion Generation on Protection Coordination

“…Garmrudi et al [30] suggested a novel hybrid islanding detection method, which depends on the average rate of voltage change and tap switching of the capacitor bank. However, the prime limitation of the above scheme is that it takes longer time (mo re than half a second) to detect islanding conditions with very small power mis match.…”

Detection and Operation of Unintentional Islands in the Presence of Distributed Generation Units

“…σ is the predefined threshold value for the parameter and is taken as 160 V/s [17]. The frequency at each bus is measured and the deviation in frequency is calculated for every time instant as:…”

“…have been proposed for islanding detection in the presence of DGs in the system. The algorithms of passive scheme include under/over frequency and voltage, rate-of-change of frequency and power, vector surge, and harmonic distortion indices [13][14][15][16][17][18]. The passive methods have small time of detection and do not degrade the system power quality.…”