Journal ArticleDOI
Virtual Instrument for Lightning Impulse Tests
A. Palani,V. Jayashankar +1 more
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TLDR
In this paper, an objective formulation of the impulse analysis problem from a signal analysis viewpoint is proposed, where the winding response is quintessentially that of a deterministic network to a finite energy signal, with breakdown and partial discharge being inherently nonlinear events.Abstract:
We propose an objective formulation of the impulse analysis problem from a signal analysis viewpoint. The winding response is quintessentially that of a deterministic network to a finite energy signal, with breakdown and partial discharge being inherently nonlinear events. A significant improvement to the acquisition of waveforms is demonstrated by a virtual instrument approach. It retains the advantages of the time- and frequency-domain methods. The drawbacks of the transfer function method are highlighted and a new piecewise linear approach is proposed for analysis. Experiments on a discrete lumped parameter model of the winding are used to validate the PXI based instrument.read more
Citations
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Journal ArticleDOI
Frequency domain correlation technique for PD location in transformer winding
V. Jeyabalan,S. Usa +1 more
TL;DR: In this article, the limitation of time domain correlation method in locating partial discharge (PD) in transformer windings is found out, and frequency domain correlation with Gram Schmidt orthogonalization is proposed.
Journal ArticleDOI
Real-Time Techniques to Measure Winding Displacement in Transformers During Short-Circuit Tests
TL;DR: In this article, the authors propose new techniques for fault detection based on continual assessment during the test. They include voltage comparison, current comparison, and real/reactive power measurements, which are validated on a number of models including a voltage transformer and a distribution transformer winding.
Journal ArticleDOI
Comparison of Impulse Wave and Sweep Frequency Response Analysis Methods for Diagnosis of Transformer Winding Faults
Qing Yang,Peiyu Su,Yong Chen +2 more
TL;DR: In this paper, a tapped transformer is designed and test platforms are built to compare winding diagnoses using the impulse wave and sweep frequency response analysis methods by recording voltage responses on both the high and low-voltage sides and calculating the respective transfer functions.
Journal ArticleDOI
A technique based on an archimedean copula for the localization of partial discharge in a transformer winding
Mithun Mondal,G. B. Kumbhar +1 more
TL;DR: A technique based on an Archimedean copula is proposed to find the location of a Partial Discharge source in a transformer winding and demonstrates that the proposed approach is capable of achieving an accurate prediction of the locations of the PD source.
Journal ArticleDOI
Statistical Techniques for Partial-Discharge Location in Transformer Windings
V. Jeyabalan,U. Usa +1 more
TL;DR: In this article, statistical techniques are used to locate the partial discharge in transformer windings, and the experimental studies are performed on a 22-kV prototype interleaved winding to prove the feasibility of the methods.
References
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Journal ArticleDOI
A correlation method for detection of partial discharges in transformers
S. Jayalalitha,V. Jayashankar +1 more
TL;DR: In this article, a correlation method is proposed for the location of partial discharge within a winding and experimental results on a lumped parameter model of a winding are shown to prove the feasibility of the method.
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
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.
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.
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