Islanding detection is an essential function for safety and reliability in grid-connected distributed generation (DG) systems. Several methods for islanding detection are proposed, but most of them may fail under multi-source configurations, or they may produce important power quality degradation which gets worse with increasing DG penetration. This paper presents an active islanding detection ...

UOVR and UOFR as passive anti-islanding methods lack of sensitivity to detect islanding. The performance gets worse when the frequency threshold is increased from 50.2 Hz to 50.6 Hz. For instance, dedicated passive methods such as ROCOF help the inverter to detect islanding. When active methods such as SFS and SVS are activated, the number of detected islandings is increased to 87.5%. To improv...

This paper presents wavelet based islanding detection in distributed generation (DG) interfaced to the microgrid. Also a new fast method is developed for islanding detection based on measuring the utility currents and voltages signals processed by discrete wavelet transform. These currents and voltages signals are measured before the main circuit breaker of microgrid network and their features ...

The interconnection of distributed generation (DG) into distribution networks is undergoing a rapid global expansion. It enhances the system’s reliability, while simultaneously reduces pollution problems related to the generation of electrical power. To fully utilize the benefits of DGs, certain technical issues need to be addressed. One of the most important issues in this context is islanding...

The growth of penetration of Distributed Generators (DGs) is increasing the risk of unwanted islanded operation in Low Voltage (LV) distribution systems. In this scenario, the existing anti-islanding protection systems, installed at the DG premises and based on classical voltage and frequency relays, are no longer effective, especially in the cases of islands characterized by a close match betw...

Islanding is detected by all distributed generations (DGs), especially those connected at secondary distribution grids. Islanding methods are mainly classified in three main categories: Passive, Active, Communication based. Hybrid methods are first time discussed in this paper. These methods are under evolution and as their advantages are coming they become an important part of islanding detect...

In this paper a passive Neuro-wavelet on the basis of islanding detection procedure for gridconnected inverter-based distributed generation has been developed. Moreover, the weight parameters of neural network are optimized by Interactive Honey Bee Matting optimization (IHBMO) to increase the efficiency of the capability of suggested procedure in tendered problem. Islanding is the situation whe...

Generally, codes and standards require that distributed generators detect when they have been separated from the main grid, and cease to energize any part of the local electric power system in that case. Industry has responded by developing a variety of means for preventing unintentional islands, which are generally highly effective in cases with small numbers of inverters from a single manufac...

Active management of distribution networks and different controllable resources will play a key role in future Smart Grids. This paper proposes that centralized active network management functionalities at MV level could also include an algorithm which in real time confirms reliable islanding detection with local measurements based passive method. The proposed algorithm continuously ensures tha...

Distributed Generator (DG) is a part of distribution network which is used to supply power both to the local loads and network. DG provides clean energy as it uses pollution free re-newable energy resources to generate power so interest in DG increases. Although DG provides many advantages such as improved reliability, efficiency etc it faces one technical issue called unwanted islanding phenom...