scholarly journals Interference analysis and suppression technology of converter transformer partial discharge test based on field measurement

2020 ◽  
Vol 1549 ◽  
pp. 052111
Author(s):  
Haibin Zhou ◽  
Jingbao Wang ◽  
Wei Chen
Keyword(s):  
Field Measurement ◽  
Partial Discharge ◽  
Interference Analysis ◽  
Discharge Test

The Identification Methods of Partial Discharge Test for Equipment

2014 ◽  
Vol 986-987 ◽  
pp. 1685-1688
Author(s):  
Qing Hao Wang ◽  
Bin Lin ◽  
Xin Yu Li ◽  
Jian Feng Li ◽  
Qi Wang ◽  
...  
Keyword(s):  
Power Transformer ◽  
Partial Discharge ◽  
Circuit Breaker ◽  
Test Equipment ◽  
Voltage Regulator ◽  
Identification Methods ◽  
Parallel Capacitor ◽  
Whole Process ◽  
Discharge Test

When the power transformer in partial discharge test, if the test equipment (voltage regulator, intermediate transformer, etc.) ontology partial discharge is big, it will severely affect the quality of testing, and even cause false identify.How to correctly identify partial discharge from the power transformer or from the test equipment itself, it is very important for the test personnel. This paper introduces to use the idle 220kV circuit breaker in parallel capacitor to cleverly find out in the whole process of partial discharge from the test equipment itself.

scholarly journals The effects of drying time during manufacturing process on partial discharge of 83.3 mva 275/160 kv power transformer

2018 ◽  
Vol 218 ◽  
pp. 04008
Author(s):  
Siswanto ◽  
Agus Indarto ◽  
Radin Rahmatullah ◽  
Chairul Hudaya
Keyword(s):  
Manufacturing Process ◽  
Power Transformer ◽  
Partial Discharge ◽  
Electrical Power ◽  
High Standard ◽  
Electrical Power System ◽  
Drying Time ◽  
Standard Design ◽  
Cellulose Insulation ◽  
Discharge Test

Power transformer (PT), essential equipment in electrical power system proceeds complicated manufacturing process to meet high standard design. During manufacturing process of PT, the drying stage is of importance to remove excessive moisture contaminant on the solid insulation. This study investigated the effects of drying duration on partial discharge test of 83.3 MVA 275/160 kV PT. The partial discharge test measurements were carried out using IEC 60270 standards comprising of the capacitive network model based on the main quantity apparent charge concept. We found that the lowest partial discharge of 21 pC was achieved at 68 hours drying duration, while the highest value of 60 pC was reached at 81 hours drying time. The longer drying time may lead to initial degradation of cellulose insulation due to excessive heating. The amount of water extracted during drying effect to partial discharge also investigated. We conclude that the drying time at a higher and lower than 68 hours significantly contributes to the increased partial discharge values of PT.

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