Leader Transition Properties of Propagating Partial Discharges in SF6 Gas and the Scaling Law under the Negative Lightning Impulse Voltage Application

2021 ◽  
Vol 141 (2) ◽  
pp. 207-216
Author(s):  
Shinya Ohtsuka ◽  
Yuta Suzuki ◽  
Yuta Nakayama
Keyword(s):  
Scaling Law ◽  
Partial Discharges ◽  
Voltage Application ◽  
Impulse Voltage ◽  
Lightning Impulse

Ferroresonance Characteristics on Capacitive Voltage Transformer Under Lightning Impulse Voltage

2016 ◽  
Vol 9 (4) ◽  
pp. 306 ◽  
Author(s):  
I. Gusti Ngurah Satriyadi ◽  
I. Made Yulistya Negara ◽  
Daniar Fahmi ◽  
N. Wijayanto ◽  
Mochammad Wahyudi ◽  
...  
Keyword(s):  
Voltage Transformer ◽  
Capacitive Voltage ◽  
Impulse Voltage ◽  
Lightning Impulse

scholarly journals Effects of RTV coating on the electrical performance of polymer insulator under lightning impulse voltage condition

PLoS ONE ◽  
2017 ◽  
Vol 12 (11) ◽  
pp. e0187892 ◽  
Author(s):  
Farah Adilah Jamaludin ◽  
Mohd Zainal Abidin Ab-Kadir ◽  
Mahdi Izadi ◽  
Norhafiz Azis ◽  
Jasronita Jasni ◽  
...  
Keyword(s):  
Electrical Performance ◽  
Polymer Insulator ◽  
Impulse Voltage ◽  
Lightning Impulse

scholarly journals Extended Use for the Frequency Response Analysis: Switching Impulse Voltage Based Preliminary Diagnosis of Potential Sources of Partial Discharges in Transformer

2020 ◽  
Vol 10 (22) ◽  
pp. 8283
Author(s):  
Kamalaselvan Arunachalam ◽  
Balasubramanian Madanmohan ◽  
Rajesh Rajamani ◽  
Natarajan Prabaharan ◽  
Hassan Haes Alhelou ◽  
...  
Keyword(s):  
Frequency Response ◽  
Low Voltage ◽  
Partial Discharges ◽  
Response Analysis ◽  
Frequency Response Analysis ◽  
Potential Sources ◽  
Impulse Voltage ◽  
Before And After ◽  
Test Voltage ◽  
Low Capacitance

The Frequency Response Analysis approach (FRA) is useful in the fault diagnosis of transformers. However, its usefulness in diagnosing any potential sources of Partial Discharge (PD) in transformers has not been thoroughly investigated so far. In this work, the use of Impulse voltage-based FRA (IFRA) in diagnosing inter-turn shorts and potential sources of PD were investigated on a 315 kVA, 11 kV/433 V transformer. Inter-turn shorts and PD sources were emulated and the usefulness of IFRA in their diagnosis was investigated while using switching impulse voltage at different magnitude levels as the test signals. For emulating the inter-turn shorts and the PDs, special tappings were provided on one of the 11 kV windings through the low capacitance bushings. Low voltage impulse was successful in diagnosing the inter-turn shorts, but unsuccessful in identifying the sources of PDs. During the test condition, the test voltage was adjusted with the presence of artificially created PD sources. The frequency response of the transformer before and after the inception of PD was observed and analyzed in this article. The FRA results demonstrated that the switching impulse voltage based IFRA approach at moderate voltages could be useful in diagnosing the presence of the potential sources of PDs.

Effect of wave oscillation on breakdown characteristics of oil-impregnated paper under lightning impulse voltage

2021 ◽  
Vol 200 ◽  
pp. 107471
Author(s):  
Ruochen Guo ◽  
Zhen Wang ◽  
Xuanrui Zhang ◽  
Jiushan Wu ◽  
Xutao Han ◽  
...  
Keyword(s):  
Wave Oscillation ◽  
Impulse Voltage ◽  
Lightning Impulse

Wave Process in Scale-Down Model of UHVDC Converter Transformer Under the Lightning Impulse Voltage

2015 ◽  
Vol 51 (11) ◽  
pp. 1-4 ◽  
Author(s):  
Zi-Heng Pu ◽  
Jiang-Jun Ruan ◽  
Ya-Dong Zhang ◽  
Zhi-Ye Du ◽  
Qi-Jia Xie
Keyword(s):  
Wave Process ◽  
Impulse Voltage ◽  
Lightning Impulse ◽  
Scale Down
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