Problem Analysis and Solutions in Transformer Field Verification

2014 ◽  
Vol 1070-1072 ◽  
pp. 1150-1153
Author(s):  
Jin Liang Wang ◽  
Jia Heng Xu ◽  
Hui Jing ◽  
Wang Yuan
Keyword(s):  
High Voltage ◽  
Technical Analysis ◽  
Problem Analysis ◽  
Voltage Transformer ◽  
Field Verification ◽  
Problems And Solutions ◽  
High Voltage Transformer

Many error abnormities and verification difficulties appear in high voltage transformer field error tests. Field verification is with site and duration limit, so it is important to timely solve problems and complete tests. Field practical problems and solutions are expounded through technical analysis for technicians in the presented work.

scholarly journals Data-Driven Anomaly Detection in High-Voltage Transformer Bushings with LSTM Auto-Encoder

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7426
Author(s):  
Imene Mitiche ◽  
Tony McGrail ◽  
Philip Boreham ◽  
Alan Nesbitt ◽  
Gordon Morison
Keyword(s):  
Anomaly Detection ◽  
High Voltage ◽  
Short Term Memory ◽  
Absolute Error ◽  
Real World Data ◽  
Voltage Transformer ◽  
Power Outage ◽  
Phase Measurements ◽  
High Voltage Transformer ◽  
Supply Industry

The reliability and health of bushings in high-voltage (HV) power transformers is essential in the power supply industry, as any unexpected failure can cause power outage leading to heavy financial losses. The challenge is to identify the point at which insulation deterioration puts the bushing at an unacceptable risk of failure. By monitoring relevant measurements we can trace any change that occurs and may indicate an anomaly in the equipment’s condition. In this work we propose a machine-learning-based method for real-time anomaly detection in current magnitude and phase angle from three bushing taps. The proposed method is fast, self-supervised and flexible. It consists of a Long Short-Term Memory Auto-Encoder (LSTMAE) network which learns the normal current and phase measurements of the bushing and detects any point when these measurements change based on the Mean Absolute Error (MAE) metric evaluation. This approach was successfully evaluated using real-world data measured from HV transformer bushings where anomalous events have been identified.

Long-period observation of neutral current at an extra-high-voltage transformer in Chubu region

2013 ◽  
Vol 183 (1) ◽  
pp. 32-38
Author(s):  
Jun Izutsu ◽  
Satoru Nagata ◽  
Tadayuki Wada ◽  
Masahito Shimizu ◽  
Kenji Ohta
Keyword(s):  
High Voltage ◽  
Neutral Current ◽  
Voltage Transformer ◽  
Long Period ◽  
High Voltage Transformer ◽  
Extra High Voltage

Corona Discharge Surface Treater Without High Voltage Transformer

2008 ◽  
Vol 23 (2) ◽  
pp. 993-1002 ◽  
Author(s):  
Nandor Burany ◽  
Laszlo Huber ◽  
Predrag Pejovic
Keyword(s):  
Corona Discharge ◽  
High Voltage ◽  
Voltage Transformer ◽  
High Voltage Transformer
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