Evaluation of On-Line DGA Limit Values and Calculation of Detecting Intervals for On-Line Monitoring Equipment for Transformers

Abstract:

Methods presented in this paper evaluate the on-line DGA results and provide specific on-line DGA limit values. For on-line equipment monitoring transformer condition, a method to calculate specific detecting intervals according to the evaluation of on-line DGA results is proposed. An example to calculate detecting intervals is demonstrated using the field test data acquired by on-line equipment for transformer condition-monitoring service.

• Periodical: Advanced Materials Research (Volumes 986-987)
• Pages: 1643-1646
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.986-987.1643
• Online since: July 2014
• Authors: Yang Liu Li*, Zhi Yong Chen
• Keywords: Detecting Intervals, DGA, Limit Values, On-Line Detection

References

[1] Michel Duval, James Dukarm. Improving the Reliability of Transformer Gas-in-Oil Diagnosis [J]. Electrical Insulation Magazine, 2005, 21(4): 21-23.

DOI: 10.1109/mei.2005.1489986

[2] Yangliu Li, Xuezeng Zhao. Estimation of the Equilibrium Concentration of H2 and CO in Transformer Oil from Membranes [J]. IEEE Electrical Insulation Magazine, 2011, 27(2): 30-33.

DOI: 10.1109/mei.2011.5739420

[3] Yangliu Li, Xuezeng Zhao, Chunzhi Guo, et al. Gas Concentration Prediction Algorithm Based on Membrane Extraction for Transformer On-line Monitoring System [J]. Electric Power Automation Equipment, 2010, 30(12): 36-41.

[4] GB/T 7252-2001, Guide To The Analysis And Diagnosis Of Gases Dissolved In Transformer Oil [S], (2001).

[5] Michel Duval. A Review of Faults Detectable By Gas - In - Oil Analysis in Transformers [J]. IEEE Electrical Insulation Magazine, 2002, 18(3): 8-17.

DOI: 10.1109/mei.2002.1014963

[6] IEC Publication 60599. Mineral Oil-impregnated Electrical Equipment in Service-guide to the Interpretation of Dissolved and Free Gases Analysis [S], 1999, (2).

DOI: 10.3403/01663710u

[7] Yangliu Li, Wenda Wu. Temperature Dependence of On-line DGA Results for Transformers through Membrane Extraction [C]. Advanced Materials Research, 2013, (614-615): 1163-1167.

DOI: 10.4028/www.scientific.net/amr.614-615.1163

[8] M. Duval et al. Joint Task Force D1. 01/ A2. 11 of CIGRE, Recent developments in DGA interpretation, CIGRE Brochure # 296, 2006, available from publications@cigre. org. Summary in Electra, 2006, 226(6): 56–60.

[9] Mineral Oil-Impregnated Electrical Equipment In Service - Guide To The Interpretation Of Dissolved And Free Gases Analysis [S], IEC Publication 60599-Amendment 1, 2007(04).

DOI: 10.3403/01663710u

[10] Michel Duval. Calculation of DGA Limit Values and Sampling Intervals in Transformers in Service[J]. IEEE Electrical Insulation Magazine, 2008, 24(5): 7-13.

DOI: 10.1109/mei.2008.4635656

[11] M. Duval, Using Gas-In-Oil Standards to Improve Accuracy of Dissolved Gas Analysis Results and Diagnoses [J]. Electricity Today, 2002, 14(6): 16-19.