An Active Anti-Islanding Method Based on Phase-PLL Perturbation

Abstract

Abstract-This paper presents a new active anti-islanding detection method for distributed power generation systems. This method is based on introducing a disturbance at the inverter output and observing the behaviour of the voltage at the point of common coupling (PCC), which depends on the impedance connected to the PCC in an islanding situation. The islanding detection is based on the Goertzel algorithm.

Accurate active islanding detection method for grid‐tied inverters in distributed generation

“…The same simulation results similarly express that the original harmonics in grid network have no effect on the islanding detection under the same RLC load. Furthermore, the islanding detection time in the case of the RLC load (about 0.06 s, which is shorter than that in [24]) is slightly shorter than that of the R load. However, for above two kinds of loads the islanding detection time of the proposed method is inside the allowable safety time defined by the standard [6].…”

Islanding detection method based on image classification technique using histogram of oriented gradient features

“…An AIDM injects a disturbance into the grid at given intervals and the response of the system is analysed. If the system response is altered, which is usually the case during the loss of grid, it is categorised as an islanding event [7][8][9][10][11][12][13][14][15].…”

IDM based on image classification with CNN

“…When the system is isolated from the grid, the injected disturbance signal will manifest as changes in the monitored parameters. These variations are used to detect islanding [8–14]. Active methods do not have NDZ; however, they will affect the power quality of the system.…”