Power transformers monitoring based on electrical measurements: state of the art

M Meira, CR Ruschetti, RE Álvarez… - IET Generation …, 2018 - Wiley Online Library
Faults diagnosis in power transformers has been traditionally based on the insulation
resistance measurement, polarisation index, analysis of dissolved gasses in oil …

Fault discrimination scheme for power transformer using random forest technique

AM Shah, BR Bhalja - IET Generation, Transmission & …, 2016 - Wiley Online Library
This study presents random forest‐based fault discrimination technique for power
transformer. The proposed scheme relies on extracting features from the measured data of …

Research on data-driven self-diagnosis for measurement errors in capacitor voltage Transformers

Z Zhang, H Lu, B Li, L Ding - IEEE Transactions on …, 2024 - ieeexplore.ieee.org
Capacitor voltage transformers (CVTs) are widely used in high-voltage power systems. Their
main problem is poor stability in measurement errors. The existing approach of utilizing …

A new method for discrimination of internal fault from other transient states in power transformer using Clarke's transform and modified hyperbolic S-transform

A Behvandi, SG Seifossadat, A Saffarian - Electric Power Systems …, 2020 - Elsevier
In this paper, a new method is proposed for discriminating internal faults from other
abnormal conditions in power transformers such as inrush currents, external faults, over …

Mechanical fault diagnosis of high voltage circuit breakers with unknown fault type using hybrid classifier based on LMD and time segmentation energy entropy

N Huang, L Fang, G Cai, D Xu, H Chen, Y Nie - Entropy, 2016 - mdpi.com
In order to improve the identification accuracy of the high voltage circuit breakers'(HVCBs)
mechanical fault types without training samples, a novel mechanical fault diagnosis method …

Comparison of various mother wavelets for fault classification in electrical systems

C Pothisarn, J Klomjit, A Ngaopitakkul, C Jettanasen… - Applied Sciences, 2020 - mdpi.com
This paper presents a comparative study on mother wavelets using a fault type classification
algorithm in a power system. The study aims to evaluate the performance of the protection …

An adaptive recursive wavelet based algorithm for real-time measurement of power system variables during off-nominal frequency conditions

A Ashrafian, M Mirsalim… - IEEE Transactions on …, 2017 - ieeexplore.ieee.org
An adaptive wavelet-based method of phasor and frequency estimations and its application
for online monitoring, control, and protective equipment are presented in this paper. The …

Review of methodologies used for detection of magnetising inrush and fault conditions in power transformer

M Raichura, N Chothani, D Patel - IET Energy Systems …, 2021 - Wiley Online Library
Reliable and dedicated protection of the transformer is the main requirement in the power
system due to the supervision of a highly expensive equipment transformer. Non‐linear …

Application of a recursive phasor estimation method for adaptive fault component based differential protection of power transformers

M Mirsalim, MAS Masoum - IEEE Transactions on Industrial …, 2016 - ieeexplore.ieee.org
An adaptive differential protection method is proposed for power transformers. First, the
phasors of captured current signals are computed using an online recursive S-transform …

A reliable setting-free technique for power transformer protection based on wavelet transform

JP Marques, C Lazaro, AP Morais… - Electric Power Systems …, 2018 - Elsevier
This paper presents a new methodology based on the analysis and monitoring of the
discrete wavelet transform (DWT) detail coefficients (DetC) for internal fault conditions …