Acousto-optical PD Detection for Transformers

Wang, Xiaodong; Li, Baoqing; Roman, Harry T.; Russo, Onofrio; Chin, Ken K.; Farmer, K.R.

doi:10.1109/tpwrd.2005.861242

Cited by 80 publications

(41 citation statements)

References 23 publications

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“…Fiber-optic acoustic sensors have been developed to increase the sensitivity of acoustic signals detection [89][90][91][92]. Actually, the fiber sensor uses an optical signal to measure acoustic signals.…”

Section: Acoustical and Optical Detection Of Pdsmentioning

confidence: 99%

Electrical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Fofana

Hadjadj

2016

Energies

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Abstract:The condition of the internal cellulosic paper and oil insulation are of concern for the performance of power transformers. Over the years, a number of methods have been developed to diagnose and monitor the degradation/aging of the transformer internal insulation system. Some of this degradation/aging can be assessed from electrical responses. Currently there are a variety of electrical-based diagnostic techniques available for insulation condition monitoring of power transformers. In most cases, the electrical signals being monitored are due to mechanical or electric changes caused by physical changes in resistivity, inductance or capacitance, moisture, contamination or aging by-products in the insulation. This paper presents a description of commonly used and modern electrical-based diagnostic techniques along with their interpretation schemes.

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Section: Acoustical and Optical Detection Of Pdsmentioning

confidence: 99%

Electrical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Fofana

Hadjadj

2016

Energies

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“…Accordingly, the following diagnostic methods for insulating systems have been developed: invasive and non-invasive electrical methods [3][4][5][6][7][8][9][10][11] ; gas chromatography; wideband methods: UHF (ultra high frequency) or VHF (very high frequency) [12][13][14] ; the acoustic emission (AE) method [15][16][17][18][19][20][21][22][23][24][25] ; and optical spectrophotometry [26][27][28][29][30] . The subject area of this paper covers improving the AE method applications.…”

Section: Acoustic Emissionmentioning

confidence: 99%

Application of a mobile system in diagnostics of power capacitors using the acoustic emission method

Błachowicz¹,

Boczar²,

Wotzka³

2016

Insight

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in the fields of informatics, electronics and electrical engineering. He obtained a PhD degree in engineering sciences and electrical engineering in 2014 from Opole University of Technology, Poland. The main objective of the work he has undertaken is diagnostics of the partial discharge (PD) effect occurring in medium voltage power capacitors. The work carried out also covers the modelling process for the phenomenon of acoustic emission generated by PDs. a PhD degree in electrical engineering from the Silesian University of Technology, Institute of Electrical Power Engineering, Gliwice, Poland. At the present time he is engaged in different applications of the acoustic emission method and other non-destructive methods, particularly in diagnostics of the insulation set-ups of electric appliances. In these fields he has published more than 300 journal and conference papers, five monographs and three books. Currently, he is a lecturer and research worker at Application of a mobile system in diagnostics of power capacitors using the acoustic emission method This paper presents the results obtained from measurements and analyses of acoustic emission (AE) signals generated by partial discharges (PD) in a model of power capacitors during experiments carried out under laboratory conditions.A remotely-controlled mobile unit (RCMU) has been used in experimental tests, allowing the safe execution of measurements in hazardous conditions. The measurement set-up and construction of the RCMU is presented. The study confirmed that it is possible to use a remotely-controlled mobile unit for carrying out measurements under high voltage.The most significant contribution of the paper lies in the idea that the PD of a condenser for electric power is detected using a mobile system, which can also be applied for other purposes related to the non-destructive diagnosis of power equipment systems working under difficult operating conditions.

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“…Among these methods, Dissolved Gas Analysis (DGA) [4]- [8], Sweep Frequency Response Analysis (SFRA) [9]- [14], no-load current harmonic analysis, dissipation factor, Manuscript received November 07, 2014; revised February 04, 2015 and April 08, 2015; accepted May 23, 2015. Authors are with the Department of Electrical Engineering, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra 440010 India (e-mail: pavenikar@gmail.com; drmsballal@rediffmail.com; bsumre@eee.vnit.ac.in; hms_1963@rediffmail.com). Partial Discharge (PD) analysis [15], [16], Frequency Domain Spectroscopy (FDS) [17], Time Domain Dielectric Response (TDDR) [17], [18] are focused towards determination of transformer internal condition. DGA is useful to detect interturn fault.…”

Section: Introductionmentioning

confidence: 99%

A Novel Offline to Online Approach to Detect Transformer Interturn Fault

Venikar

Umre

Suryawanshi

2016

IEEE Trans. Power Delivery

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This paper presents an approach based on use of transformer no-load and light load current harmonic analysis to detect presence of inter-turn fault at incipient stage. The presence of fault is detected by performing a trend analysis of specific harmonic components and primary current magnitude. Transformer testing methods suffer from a common drawback of off-line nature and require expert opinion for accurate condition assessment. This paper presents a method that transforms noload current harmonic analysis which is a special test for transformer testing into an on-line method at light load conditions. Thus, the necessity of complete shutdown and dependency on expert opinion is eliminated as it requires only one reference signature per phase. Proposed approach is verified for different vector groups of 3-phase core type transformer and three independent units connected in star-star and for fault on low voltage or high voltage winding of transformer. Experimentation presents, that proposed approach can detect presence of fault at an incipient stage involving less than 2% of turns and fault current up-to 1 p.u. A case study is presented that validates the method for transformer of higher power rating.

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Acousto-optical PD Detection for Transformers

Cited by 80 publications

References 23 publications

Electrical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Electrical-Based Diagnostic Techniques for Assessing Insulation Condition in Aged Transformers

Application of a mobile system in diagnostics of power capacitors using the acoustic emission method

A Novel Offline to Online Approach to Detect Transformer Interturn Fault

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