Results 11 to 20 of about 24,723,956 (329)
EnergiesSince power transformers are the most important pieces of equipment in electricity transmission and distribution systems, special attention must be paid to their maintenance in order to keep them in good condition for a long time.
Ancuța-Mihaela Aciu +2 more
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Impact of Load Ramping on Power Transformer Dissolved Gas Analysis [PDF]
IEEE Access, 2019 Dissolved gas in oil analysis (DGA) is one of the most reliable condition monitoring techniques, which is currently used by the industry to detect incipient faults within the power transformers.
Huize Cui +6 more
doaj +3 more sources
Radiocarbon and stable carbon analysis of dissolved methane and carbon dioxide from the profile of a raised peat bog [PDF]
, 2011 We developed and tested a new method to separate CO<sub>2</sub> and CH<sub>4</sub> from bulk gas samples for radiocarbon and stable-carbon analysis that utilizes zeolite molecular sieve.
Murray, C. +2 more
core +8 more sources
Energies, 2020 This research focuses on problem identification due to faults in power transformers during operation by using dissolved gas analysis such as key gas, IEC ratio, Duval triangle techniques, and fuzzy logic approaches.
Nitchamon Poonnoy +2 more
doaj +2 more sources
A Review of Dissolved Gas Analysis in Power Transformers
Energy Procedia, 2012 AbstractDissolved gas analysis (DGA) of transformers can provide insights into thermal and electrical stresses sustained by oil-immersed power transformers. Because it detects incipient transformer faults, DGA can help prevent further damage. Moreover, DGA is a sensitive and reliable technique for detecting incipient fault conditions in oil-immersed ...
Huo-Ching Sun
exaly +2 more sources
Electrochemical gas detection for dissolved gas analysis [PDF]
Transformers MagazineIn a previous article, gas chromatography was described as the most popular method for Dissolved Gas Analysis (DGA) conducted in laboratories. In this article, we describe the established and prevalent DGA method for online and portable devices. Over the last half-century, most DGA analyses were performed by electrochemical detection.
Grisaru, Marius
core +5 more sources
Optimal Data Selection Rule Mining for Transformer Condition Assessment
IEEE Access, 2021 The condition of the transformer can be accurately assessed based on dissolved gas online monitoring and analysis technology. With the widespread use of Dissolved Gas Analysis (DGA) technology, a large amount of dissolved gas time series data is obtained
Peng Zhang +6 more
doaj +1 more source
Applied Sciences, 2022 The dissolved gas concentration in a stirred tank has significant importance in the chemical and biological processing industries as mass transfer from the injected gas to an aqueous solution must occur for the gas to be usable.
Youngwook Lim +3 more
doaj +1 more source
Gas Losses in Transformers—Influences and Consideration
IEEE Access, 2023 Dissolved gas analysis (DGA) is frequently used for the condition assessment and monitoring of transformers. In the case of free-breathing transformers, gas losses may occur at the phase interface due to the chaotic molecular movement of the dissolved ...
Christof Riedmann +3 more
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Emitter: International Journal of Engineering Technology, 2022 Fault detection in the incipient stage is necessary to avoid hazardous operating conditions and reduce outage rates in transformers. Fault-detected dissolved gas analysis is widely used to detect incipient faults in oil-immersed transformers. This paper
Mauridhi Hery Purnomo +4 more
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