Methodology for Diagnostics of Transformers and D.C. Electric Machines
https://doi.org/10.21122/1029-7448-2009-0-4-96-105
Abstract
The paper considers methods for testing electric power equipment with reference to power transformers and electric direct current machines by measuring complex of their parameters. The above-mentioned methods have been realized in the devices DST-1M and IPEM, respectively.
An influence of inductive and capacitive elements included as components of low frequency filters in a measuring device on a value of an extra phase displacement between measured input currents and voltages being caused by them has been analyzed in the paper. The paper reveals that the extra phase displacement is initiated by oscillations of actual inductive and capacitive element values relative to their nominal values. Dependence of root-mean-square deviation of power measurement error due to phase displacement angle under load conditions at various tolerance values of the indicated elements and distribution of actual values of their nominal ones within these tolerances according to a normal low has been calculated in the paper
References
1. Feser, K. Trends in the Insulation Monitoring of Transformers / K. Feser // 10th International Symposium on High Voltage Engineering. – Montreal, 1997.
2. Malewski, R. Continuous Versus Periodic Diagnostics of HV Power Apparatus Insulation / R. Malewski // 10th International Symposium on High Voltage Engineering. – Montreal, 1997.
3. A Value Based Methodology for Selecting On-line Condition Monitoring of Substation Power Equipment / D. F. Peelo [et al.] // EPRI Substation Equipment Diagnostic Conference V. – New Orleans, Louisiana, Feb. 17, 1997.
4. An International Survey on Failures of Large Power Transformers in Service, CIGRE Working Group 12.05. Electra. No.88, January 1983.
5. Брановицкий, И. И. Исследование влияния короткозамкнутого контура на магнитные характеристики материала магнитопровода / И. И. Брановицкий, П. Д. Мацкевич // Весцi НАН Беларусi, сер. фiз.-техн. навук. – 2005. – № 3. – С. 109–112.
6. Tam, K. Current-Transformer Phase-Shift Compensation and Calibration / K. Tam. – Texas Instruments Application Report. SLAA122 – February, 2001.
Review
For citations:
Branovitsky I.I., Matskevich P.D., Skurtu I.T. Methodology for Diagnostics of Transformers and D.C. Electric Machines. ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations. 2009;(4):20-27. (In Russ.) https://doi.org/10.21122/1029-7448-2009-0-4-96-105
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