- Title
- Dissolved gas analysis for power transformers within distributed renewable generation-based systems
- Creator
- Cui, Huize; Yang, Liuqing; Zhu, Yuanwei; Li, Shengtao; Abu-Siada, Ahmed; Islam, Syed
- Date
- 2021
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/179699
- Identifier
- vital:15645
- Identifier
-
https://doi.org/10.1109/TDEI.2021.009490
- Identifier
- ISBN:1070-9878 (ISSN)
- Abstract
- In this paper, a series of laboratory experiments are conducted to investigate the effect of momentary small variations in the transformer operating temperature on the dissolved gas analysis (DGA) measurement. With the increased penetration level of renewable energy sources of intermittent characteristics into electricity grids, operating power transformers are expected to experience frequent temperature variations. Sampling transformer oil during such temperature variation leads to inaccurate diagnosis. Experimental results reveal that gas evolution in transformer oil is greatly affected by the small variations in the operating temperature. Such small variation can be a result of the intermittent generation characteristics of renewable energy sources. Hence, false analysis may be reported if oil is sampled during generation or load fluctuation events. Experimental results are explained through chemical equilibrium constant theory, which indicates that dissolved gases reflect the change in aging rate of the transformer oil-paper insulation system. These results suggest a new paradigm for DGA process through correlating measurements with the transformer operating temperature through the generation and load profiles at the instant of oil sampling. © 1994-2012 IEEE.
- Publisher
- Institute of Electrical and Electronics Engineers Inc.
- Relation
- IEEE Transactions on Dielectrics and Electrical Insulation Vol. 28, no. 4 (2021), p. 1349-1356
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright © 1994-2012 IEEE
- Subject
- 0906 Electrical and Electronic Engineering; Chemical equilibrium constant; Dissolved gas analysis; Insulation system; Power transformers
- Reviewed
- Funder
- This work has been supported by the National Key Research and Development Program of China (2017YFB0902705), the National Natural Science Foundation of China (51907148), State Key Laboratory of Electrical Insulation and Power Equipment (EIPE20210), the Foundation Project of State Grid in Shaanxi province section, China (SGSNKY00SPJS1900302), the China Postdoctoral Science Foundation (2018M643648), and the Fundamental Research Funds for the Central Universities (xjh012019023).
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