Hyperbolic Window S-Transform Aided Deep Neural Network Model-Based Power Quality Monitoring Framework in Electrical Power System

With the fast development of power grid the usage of electrical equipments is increased which led to importance of power quality disturbance sensing for reliable and smooth operation. In this paper, a deep neural network has been designed using stacked autoencoder (SAE) for deep feature extraction f...

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Bibliographic Details
Published in:IEEE sensors journal 2021-06, Vol.21 (12), p.13695-13703
Main Authors: Nandi, Kiron, Das, Arup Kumar, Ghosh, Riddhi, Dalai, Sovan, Chatterjee, Biswendu
Format: Article
Language:English
Subjects:
Artificial neural networks
classification
Classifiers
deep neural network
Electric power grids
Electric power systems
Feature extraction
Frequency spectrum
hyperbolic window s-transform
Machine learning
Monitoring
Neural networks
Power quality detection
Power system reliability
Reliability
Sensors
stacked autoencoder
Time-frequency analysis
Transforms
Transient analysis
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Summary:With the fast development of power grid the usage of electrical equipments is increased which led to importance of power quality disturbance sensing for reliable and smooth operation. In this paper, a deep neural network has been designed using stacked autoencoder (SAE) for deep feature extraction from time-frequency spectrum of single and combined PQ disturbances in electrical power system network. For this purpose, synthetic PQ signals are analyzed in time-frequency domain through hyperbolic window stockwell transform (HWST). Thereafter, PQ signal converted HWST time-frequency matrix has been grouped into time-frequency blocks and subsequently fed as input to 3-layer stacked autoencoder model (SAE) for deep feature learning. Finally, the extracted deep features are classified through several machine learning classifier. The results indicate that proposed framework using XGboost classifier can classify 18 different single and combined PQ event with a 99.86% accuracy. The proposed framework also yields satisfactory outcome with real life PQ data. Therefore, proposed framework can be implemented for Power quality monitoring in electrical power system.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2021.3071935