Application of digital filtering techniques to the determination of partial discharge location in transformers

James, R.E.; Phung, B.T.; Su, Qi

doi:10.1109/14.34201

Cited by 65 publications

(15 citation statements)

References 4 publications

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“…The ratio between aforementioned transfer functions gives a reference curve, which is ratio versus frequency and might be used to localize partial discharge in the frequency range in which transformer winding can be considered as a capacitive network. More details could be found in [9].…”

Section: Simulation Resultsmentioning

confidence: 99%

Simulation of partial discharge propagation and location in Abetti winding based on structural data

Naderi

Vakilian

Blackburn³

et al. 2005

2005 International Power Engineering Conference

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Power transformer monitoring as a reliable tool for maintaining purposes of this valuable asset of power systems has always comprised partial discharge offline measurements and online monitoring. The reason lies in non-destructive feature of PD monitoring. Partial discharge monitoring helps to detect incipient insulation faults and prevent insulation failure of power transformers. This paper introduces a software package developed based on structural data of power transformer and discusses the results of the simulation on Abetti winding, which might be considered as a basic layer winding. A hybrid model is used to model the transformer winding, which has been developed by first author. Firstly, winding is modeled by ladder network method to determine model parameters and then multiconductor transmission line model is utilized to work out voltage and current vectors and study partial discharge propagation as well as its localization. Utilized method of modeling makes it possible to simulate a transformer winding over a frequency range from a few hundred kHz to a few tens of MHz. The results take advantage of accurate modeling method and provide a reasonable interpretation as to PD propagation and location studies.

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Section: Simulation Resultsmentioning

confidence: 99%

Simulation of partial discharge propagation and location in Abetti winding based on structural data

Naderi

Vakilian

Blackburn³

et al. 2005

2005 International Power Engineering Conference

Self Cite

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“…Analysis of the magnitudes of the obtained frequency responses will yield an average magnitude over the frequency range of interest [5,9,10]. However, again based on the assumption that the PD event at the source can be represented as a Dirac function, it is also possible to use the frequency responses of captured PD pulses to find an average magnitude for the frequency range of the captured signals and thus define α using (15).…”

Section: A Estimating Pd Source Locationmentioning

confidence: 99%

Locating partial discharge sources in high voltage transformer windings

Lewin

Golosnoy

Mohamed

2011

2011 Electrical Insulation Conference (EIC).

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The analysis of partial discharge (PD) measurement data obtained using radio frequency current transducers (RFCT) incorporated into the external earthing connections (i.e bushing tap points and neutral to earth connections) offers the possibility of on-line condition monitoring of large transformers. A method for locating PD sources in windings has been developed, based on analysis of differential equations that model the propagation of PD signals from the source to the measurement point. Analysis reveals that if the discharge at the source is assumed to be impulse-like, then the form of the response at the measurement points can be simulated as a function of source location along the winding. If all parameters of the winding are known then it is possible to model the response, however, in the field this is often not the case. So the method developed here uses information from the PD measurements themselves to estimate the unknown coefficients required to simulate the likely discharge currents. With these estimates it is then possible to compare PD measurement information with simulation data in order to identify the most likely location of a PD source. An experiment based on a section of high voltage winding has been used to produce PD measurement data and to validate the proposed approach.

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“…The signal at the measuring point is thus (1) For the case of the detection of one of ten signals to , one has to design a receiver that operates on and chooses one of the hypotheses…”

Section: Signal Detection Using Correlationmentioning

confidence: 99%

“…A NUMBER OF methods have been proposed for the location of partial discharges (PDs) within windings [1]- [3]. A characteristic of the existing methods is that the problem formulation envisages energization of the winding with pulse excitation from a discharge source.…”

Section: Introductionmentioning

confidence: 99%