Journal ArticleDOI
Current Status and Future Trends in Frequency-Response Analysis With a Transformer in Service
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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.Abstract:
This paper presents 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. As a result, three basic stages of the online FRA test have been identified and defined: injection and excitation signal measurement; recording, filtering and processing of measured signals; and curve analysis and interpretation. This work presents an overview of the online FRA technique, useful for subsequent research in this area.read more
Citations
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Journal ArticleDOI
Diagnostic Measurements for Power Transformers
Stefan Tenbohlen,S. Coenen,Mohammad Djamali,Andreas Müller,Mohammad Hamed Samimi,Martin Siegel +5 more
TL;DR: In this paper, the authors present the status and current trends of different diagnostic techniques of power transformers and provide significant tutorial elements, backed up by case studies, results and some analysis.
Journal ArticleDOI
Frequency response analysis (FRA) of transformers as a tool for fault detection and location: A review
TL;DR: In this article, the frequency response analysis (FRA) is considered among the powerful methods of transformers' condition assessment, and its application and test procedure as well as comprehensive review of the researches and attempts that are done on different aspects of this field for enhancing quality and repeatability of the test and the interpretation of the results.
Journal ArticleDOI
Detection of Power Transformer Winding Deformation Using Improved FRA Based on Binary Morphology and Extreme Point Variation
TL;DR: An improved FRA based on binary morphology and extreme point variation is proposed, which has a potential to realize cluster analysis of fault types.
Journal ArticleDOI
A Review of Frequency Response Analysis Methods for Power Transformer Diagnostics
TL;DR: Frequency response analysis (FRA) is a powerful technique for diagnosing transformer winding deformation and several other types of problems that are caused during manufacture, transportation, installation and/or service life.
Journal ArticleDOI
Transformer winding deformation diagnostic system using online high frequency signal injection by capacitive coupling
Chenguo Yao,Zhongyong Zhao,Chen Yu,Xiaozhen Zhao,Li Zhaojiong,Wang Yong,Zehong Zhou,Gang Wei +7 more
TL;DR: In this paper, a diagnostic system for online monitoring power transformer winding deformation based on frequency response analysis (FRA) is proposed to detect the early signs of faults with continuous online monitoring transformer.
References
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Journal ArticleDOI
For the Grid and Through the Grid: The Role of Power Line Communications in the Smart Grid
TL;DR: In this article, the authors provide an overview of what PLC can deliver today by surveying its history and describing the most recent technological advances in the area and discuss the main conclusions one can draw from the literature on these subjects.
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
Wavelets and electromagnetic power system transients
TL;DR: The wavelet transform was introduced as a method for analyzing electromagnetic transients associated with power system faults and switching as mentioned in this paper, and it is more appropriate than the familiar Fourier methods for the nonperiodic, wide-band signals associated with EM transients.
Journal ArticleDOI
Wavelet based on-line disturbance detection for power quality applications
TL;DR: In this paper, a wavelet transform based online voltage disturbance detection approach is proposed to identify voltage disturbances and discriminates the type of event which has resulted in the voltage disturbance, e.g. either a fault or a capacitor switching incident.
Journal ArticleDOI
Status and trends in transformer monitoring
TL;DR: In this article, a survey of the most important methods for on-line monitoring and off-line diagnostics is given, and the area of life assessment is discussed, and in particular the difference between end-of-life of the insulating material and of the transformer is emphasized.