Proceedings ArticleDOI
Programmable continuous time filters for impulse testing of transformers
S. Jayalalitha,A. Palani,V. Jayashankar +2 more
- pp 99-102
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TLDR
In this paper, an objective formulation of the impulse testing procedure is proposed based on models for winding response as well as fault models, and experimental validation of the fault models for breakdown and partial discharge is provided.Abstract:
An objective formulation of the impulse testing procedure is proposed based on models for winding response as well as fault models. Experimental validation of the fault models for breakdown and partial discharge (PD) is provided. A new adaptive filtering approach is proposed for analysis during impulse tests. The procedure is validated with experimental investigation on a 10 section lumped parameter network.read more
Citations
More filters
Proceedings ArticleDOI
Fuzzy logic based impulse test analysis
S. Jayalalitha,V. Jayashankar +1 more
TL;DR: A fusion of hard and soft computing is proposed for the impulse analysis problem, where the number of simulations can become unbounded to cater to all types of faults and lead to automation of impulse analysis function.
Patent
Monitoring system for power transformers and monitoring method
TL;DR: In this article, a monitoring system for power transformers is presented, comprising at least one measuring device (58) for continuously detecting a voltage signal (U'(t), U1't, U2't', U3't), 100, 110), integrated in a passage (14, 16, 18, 50) of the power transformer (12), and at least two evaluation devices (20, 78, 94, 94) for analyzing at least the voltage signal.
Journal ArticleDOI
Fuzzy Logic based Fault Classification of Impulse Test Records
S. Jayalalitha,V. Jayashankar +1 more
TL;DR: In this paper, a fuzzy logic approach is proposed for identification and classification of faults based on records obtained during impulse tests on transformers, where the outputs of three filters form the basis of identification.
Proceedings ArticleDOI
An Adaptive High Resolution Measuring System for Charcaterizing Transformers Subjected to Broadband Excitation
A. Palani,V. Jayashankar +1 more
TL;DR: In this article, the authors proposed an adaptive architecture that characterizes all these events in a unified manner, based on the PXI hardware with necessary software developed under LABVIEW environment.
References
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Journal ArticleDOI
Impulse testing of power transformers - a model reference approach
TL;DR: In this article, an objective classification of faults that can occur during impulse tests on power transformers is proposed, including nonlinear elements, breakdown, and partial discharge events, and an analysis of a layer winding, in the time and frequency domains, with these faults shows that current assessment methods must be used with caution.
Proceedings ArticleDOI
Partial discharges during impulse tests
TL;DR: A phenomenological model for partial discharge that can be used for simulation studies in lumped parameter networks is proposed in this paper, where the classical 'abc' model of PD is a subset of the proposed model.
Proceedings ArticleDOI
The influence of winding type on the recognition of partial discharges [power transformer testing]
TL;DR: In this article, an instrumentation scheme for the acquisition of waveforms during the lightning impulse test on transformers is proposed, where three filters segregate the response into distinct frequency bands.
Proceedings ArticleDOI
Identification and location of breakdown in windings
TL;DR: In this article, it is shown that the nearest neighbourhood rule based on a clustering approach provides a good framework for fault location. But it is not shown how to estimate the location of the fault based on the resonant frequencies of the winding current.
Journal ArticleDOI
Simulation of faults during impulse tests
TL;DR: In this article, experimental results on fault simulations during impulse tests across windings and other specifically designed networks are reported, both breakdown and partial discharge studies are conducted with digital acquisition of fault records.
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