Proceedings ArticleDOI
Online monitoring of power transformers using impulse frequency response analysis
Hossein Rahimpour,Steve Mitchell,Saeed Rahimpour +2 more
- pp 1390-1394
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TLDR
In this article, a growing interest in the development of on-line monitoring techniques for smart grid systems is discussed, which is to reduce the maintenance costs as well as minimize the probability of unexpected outages, or potentially to prevent catastrophic failures in the electrical network.Abstract:
With the recent development in smart grid systems, there is now a growing interest in the development of on-line monitoring techniques. This is to reduce the maintenance costs as well as minimizing the probability of unexpected outages, or potentially to prevent catastrophic failures in the electrical network.read more
Citations
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Journal ArticleDOI
A Smart Frequency Domain-Based Modeling Procedure of Rogowski Coil for Power Systems Applications
TL;DR: A smart way for the equivalent parameters’ computation of the Rogowski coil is focused on and the results have been used to validate Rogowski’s output estimate procedure presented by the authors in a previous work.
Journal ArticleDOI
Real-Time Minimization Power Losses by Driven Primary Regulation in Islanded Microgrids
Quynh T. Tran,Eleonora Riva Sanseverino,Gaetano Zizzo,Maria Luisa Di Silvestre,Tung Lam Nguyen,Quoc Tuan Tran +5 more
TL;DR: A real-time driven primary regulation, which relies on optimized P-f droop coefficients, is proposed, which minimizes the power losses for islanded microgrids in all operating conditions.
Journal ArticleDOI
Characterizing power transformer frequency responses using bipolar pseudo-random current impulses
TL;DR: In this paper, the authors used a unique excitation waveform comprising of pseudo-random current impulses to accurately identify the wideband characteristics of a power transformer by injecting the waveform to the relevant transformer terminals, frequency responses are determined by cross-correlation of the perturbation signal, and the measured response.
Proceedings ArticleDOI
Reconstruction of the Transformer Response from on-Line FRA Measurements Performed via Bushing Taps
TL;DR: In this article, a cascade two-port transmission matrix model for the on-line FRA measurement chain that includes the developed bushing model is presented. But the model is not suitable for the measurement of large power transformers, as it requires the bushing test tap of capacitivly-graded or condenser bushings.
Proceedings ArticleDOI
The Influence of External Parameters on Transformer Frequency Response Signature and Numerical Indices
TL;DR: In this article, the effect of external resistance and capacitance on Statistical Indicators (SIs) is analyzed. And the most significant influence is caused by the impedance parallel to the winding.
References
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Journal ArticleDOI
Review of condition assessment of power transformers in service
TL;DR: In this article, an extensive review is given of diagnostic and monitoring tests, and equipment available that assess the condition of power transformers and provide an early warning of potential failure, which is a very important issue for utilities.
Journal ArticleDOI
Interpretation of Transformer FRA Responses— Part I: Influence of Winding Structure
TL;DR: In this paper, the authors address one of the major factors that affect the FRA responses: the winding structure itself, which can be categorized into windings with either high- or low-series capacitance in proportion to the shunt capacitance.
Journal ArticleDOI
Current Status and Future Trends in Frequency-Response Analysis With a Transformer in Service
TL;DR: In this article, the authors present the current status and future trends in the application of the frequency response analysis (FRA) technique with the transformer in service (online) through bibliographic review and analysis.
Journal ArticleDOI
Diagnosing Shorted Turns on the Windings of Power Transformers Based Upon Online FRA Using Capacitive and Inductive Couplings
TL;DR: In this paper, a new technique for online transfer function monitoring of the power transformers windings through a quite simple, economic, and noninvasive capacitive sensor installed on the surface of the transformer bushing is presented.
Journal ArticleDOI
Apparatus for Online Power Transformer Winding Monitoring Using Bushing Tap Injection
TL;DR: In this paper, a custom high-power signal generator that injects high-frequency signals on the bushing tap of the transformer under investigation, as well as a circuit to replace the short bushing-tap short and allow online operation of the system is demonstrated on a 650 kV transformer.