This paper presents the results of a research project dealing with the development of an adjustable converter for the injection of power generated by low voltage energy sources (primarily fuel cells used for decentral cogeneration of electric and thermal energy) into the public grid. The converters principle of operation is explained; measurements demonstrate the performance of the converter in...

The need of reducing CO2 emissions in electricity generation field for solving global warming problems have led to increase the interest in Micro-Grid (MG) especially the one which included renewable sources. MG normally operates in normal interconnected mode and connects with the main grid. When a large disturbance happens in main grid, MG transfer to islanding mode. This paper deals with conn...

This paper proposes a new hybrid islanding detection method for grid-connected photovoltaic system (GCPVS)-based microgrid. In the presented technique, suspicious event is initially recognized whilst absolute deviation of point common coupling (PCC) voltage surpasses threshold. After an intentional delay, transient disturbance injected into source inverter’s d-axis reference current to decline ...

• The AFD, SFS, SMS, and SVS active islanding detection methods. studied methods provide good times within the new grid standards. have under different parameters scenarios. are compared for first time in a detailed study. This paper systematically analyzes performance case studies scenarios of most well-known (IDMs) single-phase grid-connected photovoltaic (PV) systems. They named as follows: ...

This paper presents an investigation of different islanding detection techniques which focus on operating parameters. These parameters are to decide whether the system will be islanded or not. The process is based on measuring the voltage, frequency and phase angle at the point of common coupling. The rate of change must be integrated to distinguish the changes in the system, the rate of change...

This paper presents an artificial neural network (ANN) based method for islanding detection of distributed synchronous generators. The proposed method takes advantage of ANN as pattern classifiers. It is capable of identifying the islanding condition based on samples of the voltage waveform measured at the distributed generator terminals only, which is an important advantage over other ANN-base...

Nowadays, renewable energies are very crucial and have a special place in the world. Renewable-energy resources are utilized by most of the Distributed Generations (DG) in the grid interconnected power system. Due to the advantages of renewable energy resources like clean nature, pollution free, cost free, the use of they are increasing in daily life. The major problems due to such distributed ...

• High power quality MPPT based-islanding detection method is presented. Accurate islanding within the 137 ms observed. Acceptable total demand distortion and harmonic spectra are met in compliance with existing standards under various penetrations. The efficiency drops by 0.52% whilst disturbance stimulated once a minut. Islanding condition when distributed generators (DGs) disconnected electr...