IEEE C57.127 2007

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IEEE Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors

Published By	Publication Date	Number of Pages
IEEE	2007	57

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Description

Revision Standard – Active. This guide is applicable to the detection and location of acoustic emissions from partial discharges and other sources in oil immersed power transformers and reactors. It is intended to provide a means of associating the relative magnitude and position of partial discharges and other sources with the acoustic signals obtained by strategically located transducers.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std C57.127-2007 Front Cover
3	Title page
6	Introduction Notice to users Errata Interpretations Patents
7	Participants
9	CONTENTS
11	IEEE Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors 1. Overview 1.1 Scope 1.2 Purpose 1.3 Safety warnings
12	2. Definitions
13	3. Detection and measurement of PD—Background information
14	4. Introduction to acoustic PD systems
15	4.1 All-acoustic system 4.2 Acoustic system with an electrical PD trigger
16	4.3 On-line (continuous) acoustic monitoring system 5. Acoustic signal and transmission characteristics 5.1 Acoustic signal
18	5.2 Acoustic signal propagation from source to tank wall 5.3 Acoustic signal propagation within the tank wall
19	5.4 Velocity of sound in oil 6. AE systems—Equipment specifications 6.1 Introduction
20	6.2 Acoustic systems that record single events
21	6.3 Digital signal processing (DSP) workstations that record acoustic data over extended periods 6.4 On-line (continuous) acoustic PD monitoring systems
22	6.5 External sensor 6.6 Internal sensor 6.7 Three-sensor system
23	6.8 Band-pass filter 7. AE testing 7.1 Personnel qualification and certification 7.2 Field versus factory test differences 7.3 General considerations on the application of sensors
25	8. AE field test procedure 8.1 Introduction 8.2 Test setup 8.3 Sensor placement and initial scan
26	8.4 Monitoring techniques
27	8.5 Locating the source of the signal 8.6 Reporting and followup 9. Factory test procedure using an electrical trigger 9.1 Introduction
28	9.2 Initial sensor placement
31	9.3 Measurements and changing of sensor placement
32	10. Characterization of AE signals 10.1 Introduction 10.2 General—AC systems
33	10.3 Acoustic systems that record single events
36	10.4 DSP workstations that record acoustic data over extended periods 10.5 On-line (continuous) acoustic partial discharge monitoring systems 10.6 HVDC transformers and reactors
37	10.7 Characteristics of PD from static electrification 10.8 Acoustic activity from thermal faults, the core, mechanical noises, and other sources
38	10.9 Comparison between electrical and acoustic signa 11. Integrating AE results with data from oil analysis
40	12. Acoustic activity interpretation
41	Annex A (informative) Bibliography
46	Annex B (informative) Signal processing
47	Annex C (informative) Wavelet signal processing theory
50	Annex D (informative) Tutorial and case studies for detection and location of AE from PD

Additional information

Standard Title	IEEE Guide for the Detection and Location of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers and Reactors
Published Code	IEEE
Publication Date	2007
Pages Count	57

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IEEE C57.127 2007

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