Impulse testing of power transformers – a model reference approach

Arunkumar, S.; Sandeep, V.; Shankar, Siddharth; Gopalakrishnan, Manoj; Udayakumar, K.; Jayashankar, V.

doi:10.1049/ip-smt:20030761

Cited by 34 publications

(32 citation statements)

References 4 publications

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“…The advantage of the proposed method is that the duration of the PD can be independently controlled. Results of faults during chopped impulse test are described in [2].…”

Section: Controlled Switch For Pd Simulationmentioning

confidence: 99%

Simulation of faults during impulse tests

Jayashankar

Palani

Usa³

et al. 2005

IEEE Trans. Power Delivery

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“…The advantage of the proposed method is that the duration of the PD can be independently controlled. Results of faults during chopped impulse test are described in [2].…”

Section: Controlled Switch For Pd Simulationmentioning

confidence: 99%

Simulation of faults during impulse tests

Jayashankar

Palani

Usa³

et al. 2005

IEEE Trans. Power Delivery

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“…According to the fault detection principle, the transformer is said to have withstood the applied voltage if there is no substantial differences between RFW records (i n (t) & v n (t)) and those at 1FW (i f (t) & v f (t)). Hence, the differences between i n (t) and i f (t) forms the basis for failure recognize by model reference approach [5] and extended numerically using Euclidean distance method (unbounded measure) [6]. If the transformer withstood the 1FW, then ∆I nf and ∆V nf will be zero.…”

Section: Principles For Fault Detectionmentioning

confidence: 99%

Nonlinear Interpretation Technique for Lightning Impulse Test

Velandy¹

2015

IEEE Trans. Power Delivery

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“…The first is to avoid any circuit interpretation and perform an analysis with the exact current PD signals across various nodes. This is the approach followed in [13]. A second approach, is to extract the main features of the experimental data from a signal analysis point of view and use it in a simplified circuit model [14].…”

Section: Experimental Data On Pdmentioning

confidence: 99%

A Lock-in Technique for PD Measurement during Impulse Tests

Palani

Jayashankar

Gopalakrishnan

2007

IEEE Trans. Dielect. Electr. Insul.

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A method is proposed for recognizing PD events within a winding during impulse tests using a lock-in amplifier technique. The resonant frequencies of the winding serve as the basis of selection of the lock-in amplifier reference frequencies. It is implemented with a virtual instrument and validated with an independent stand-alone lock-in amplifier. A physical model of a winding with discrete elements is used to demonstrate the results. A theoretical basis for the instrument is established using an 'abc' model of PD along with a linear discrete winding model. The influence of location of PD is also addressed. The method will provide online recognition of PD during the impulse test and can be adapted for onsite measurements.Index Terms -Impulse test, transformer, partial discharge, lock-in amplifier, virtual instrument.

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Impulse testing of power transformers – a model reference approach

Cited by 34 publications

References 4 publications

Simulation of faults during impulse tests

Simulation of faults during impulse tests

Nonlinear Interpretation Technique for Lightning Impulse Test

A Lock-in Technique for PD Measurement during Impulse Tests

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