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High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
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Superimposed modal voltage based passive islanding detection of grid tied distributed generation using Wigner
Hani Albalawi1, Syed Basit Ali Bukhari2, Aadel Mohammed Alatwi1
1Renewable Energy and Environmental Technology Center, University of Tabuk, 47913, Tabuk, Saudi Arabia.
Scientific Reports
|August 4, 2025
Summary
This study presents a new method for detecting unintentional islanding in distributed generation (DG) systems. The novel approach uses Wigner distribution and alienation index for faster and more accurate islanding detection.
Area of Science:
- Electrical Engineering
- Power Systems Engineering
Background:
- Distributed generation (DG) integration enhances grid resilience and sustainability.
- Unintentional islanding of DG systems poses significant risks to grid stability, equipment, and safety.
Purpose of the Study:
- To develop a novel and effective method for detecting unintentional islanding events in grid-tied DG systems.
- To improve the speed and accuracy of islanding detection compared to existing techniques.
Main Methods:
- Extraction of modal voltage signal from three-phase voltage measurements.
- Utilisation of delta filters to capture superimposed modal voltage components.
- Development of an islanding detection index (IDI) using Wigner distribution functions and alienation index.
Main Results:
- The proposed IDI effectively characterizes islanding signatures.
- Simulations in MATLAB/SIMULINK validated the method's effectiveness on a standard IEC microgrid.
- The IDI demonstrated superior performance in speed, accuracy, and reduced non-detection zones compared to traditional methods.
Conclusions:
- The novel Wigner distribution and alienation index-based method provides a robust solution for unintentional islanding detection in DG systems.
- This approach enhances the safety and reliability of modern electric grids with integrated DG.
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