Identification of Internal Faults in Indirect Symmetrical Phase Shift Transformers Using Ensemble Learning

Abstract

This paper proposes methods to identify 40 different types of internal faults in an Indirect Symmetrical Phase Shift Transformer (ISPST). The ISPST was modeled using Power System Computer Aided Design (PSCAD)/ Electromagnetic Transients including DC (EMTDC). The internal faults were simulated by varying the transformer tapping, backward and forward phase shifts, loading, and percentage of winding faulted. Data for 960 cases of each type of fault was recorded. A series of features were extracted for a, b, and c phases from time, frequency, time-frequency, and information theory domains. The importance of the extracted features was evaluated through univariate tests which helped to reduce the number of features. The selected features were then used for training five state-of-the-art machine learning classifiers. Extremely Random Trees and Random Forest, the ensemble-based learners, achieved the accuracy of 98.76% and 97.54% respectively outperforming Multilayer Perceptron (96.13%), Logistic Regression (93.54%), and Support Vector Machines (92.60%)

18th IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), 2018

References in corpus (1)

• Distributed and parallel time series feature extraction for industrial big data applications

Cited by in corpus (3)

• Discrimination of Internal Faults and Other Transients in an Interconnected System with Power Transformers and Phase Angle Regulators
• Detection and Classification of Internal Faults in Power Transformers using Tree-based Classifiers
• Intelligent Protection & Classification of Transients in Two-Core Symmetric Phase Angle Regulating Transformers