Calibration Methods For Reproducible And Comparable Electromagnetic Partial Discharge Measurements In Power Transformers
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Calibration Methods For Reproducible And Comparable Electromagnetic Partial Discharge Measurements In Power Transformers
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Author : Martin Siegel
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-11-20
Calibration Methods For Reproducible And Comparable Electromagnetic Partial Discharge Measurements In Power Transformers written by Martin Siegel and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-11-20 with Technology & Engineering categories.
The reliability of electrical energy networks depends on the quality and availability of their electrical equipment, e.g., power transformers. Local failures inside their insulation can lead to breakdowns resulting in high outage and penalty costs. To prevent these destructive events, power transformers are tested for partial discharge (PD) activity in a routine test before shipment. Furthermore, PD activity can be evaluated as a diagnostic measurement on-site (on-line or off-line) or be constantly monitored during service using the ultra-high frequency (UHF) method. In this thesis, a calibration procedure is proposed for the UHF method used in power transformers, which is lacking so far. The calibration process is required to ensure both reproducibility and comparability of UHF measurements. Only a calibrated UHF measurement procedure can be deemed reliable and eventually be introduced to supplement in (site-)acceptance tests of power transformers. The proposed calibration method considers two factors: The influence of the UHF sensors' sensitivity and that of the UHF instrument characteristics, including accessories like cables, pre-amplifier, etc. The UHF instruments' influence is corrected by using a defined and invariable test signal as a reference for all recording devices comparable to the calibration method used in IEC 60270 for electrical PD measurement. The sensitivity of the UHF sensor is addressed by a characterization of UHF sensors using the antenna factor (AF) measured in a special reproducible setup, i.e., a GTEM cell. In this thesis, a self-built GTEM cell is presented, which is oil-filled to address the environmental conditions inside a transformer where the sensor will be used. With such a cell, influences on the AF of UHF sensors are investigated, and it is shown that sensor sensitivities measured in an air-filled cell can be corrected to the oil environment. A practical evaluation of the proposed calibration procedure is performed in a laboratory setup on a distribution transformer with different UHF instruments and sensors using artificial PD signals and real high voltage driven PD sources. Finally, this thesis identifies future research topics, which may be needed to improve the proposed UHF calibration procedure for power transformers and the UHF method in general.
Autarkes Zustandsmonitoring Von Kabelmuffen Auf Basis Integrierter Teilentladungs Und Temperatursensorik
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Author : Daniel Passow
language : de
Publisher: BoD – Books on Demand
Release Date : 2024-06-03
Autarkes Zustandsmonitoring Von Kabelmuffen Auf Basis Integrierter Teilentladungs Und Temperatursensorik written by Daniel Passow and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-06-03 with Technology & Engineering categories.
Das Hauptaugenmerk dieser Arbeit liegt auf der Erarbeitung und Darstellung eines Konzepts zur autarken Zustandsanalyse von Kabelmuffen im Rahmen eines Onlinemonitorings. Dieses basiert dabei auf der direkten Integration von Teilentladungs- und Temperatursensoren an der Kabelmuffe. Im Rahmen der Konzepterarbeitung wird unter anderem die Sensitivität der entwickelten Teilentladungssensorik messtechnisch nachgewiesen. Zusätzlich werden für eine zukünftige Auslegung der TE-Sensorik einige validierte Modelle dargestellt. Außerdem wird auf Basis eines experimentellen Versuchs das thermische Verhalten einer Kabelmuffe eruiert. Darüber hinaus werden unterschiedliche Wege zur modelltechnischen Abbildung des thermischen Verhaltens aufgezeigt.
Practical Partial Discharge Measurement On Electrical Equipment
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Author : Greg C. Stone
language : en
Publisher: John Wiley & Sons
Release Date : 2023-08-28
Practical Partial Discharge Measurement On Electrical Equipment written by Greg C. Stone and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-08-28 with Technology & Engineering categories.
Practical Partial Discharge Measurement on Electrical Equipment Accessible reference dealing with (partial discharge) PD measurement in all types of high voltage equipment using modern digital PD detectors Practical Partial Discharge Measurement on Electrical Equipment is a timely update in the field of partial discharges (PD), covering both holistic concepts and specific modern applications in one volume. The first half of the book educates the reader on what PD is and the general principles of how it is measured and interpreted. The second half of the book is similar to a handbook, with a chapter devoted to PD measurements in each type of high voltage (HV) equipment. These chapters contain specific information of the insulation system design, causes of PD in that equipment, off-line and on-line measurement methods, interpretation methods, and relevant standards. The work is authored by four well-known experts in the field of PD measurement who have published hundreds of technical papers on the subject and performed thousands of PD measurements on all the different types of HV equipment covered in the book. The authors have also had relationships with PD detector manufacturers, giving them key insights into test instruments and practical measurements. Sample topics covered in the work include: Physics of PD, discharge phenomena (contact sparking and vibration sparking), and an introduction to PD measurement (electrical, optical, acoustic, and chemical) Electrical PD detection (types of sensors), RF PD detection (antenna, TEV), and PD instrumentation and display Off-line and on-line PD measurements, general principles of PD interpretation, and laboratory PD testing of lumped test objects PD in different types of HV equipment (power cables, power transformers, air insulated metal-clad switchgear, rotating machines, gas-insulated switchgear, and more) For HV equipment OEMs, users of HV equipment, or employees of companies that provide PD testing services to clients, Practical Partial Discharge Measurement on Electrical Equipment is an essential reference to help understand general concepts about the topic and receive expert guidance during specific practical applications.
Electrical Electronics Abstracts
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Author :
language : en
Publisher:
Release Date : 1997
Electrical Electronics Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Electrical engineering categories.
Publications Of The National Institute Of Standards And Technology 1988 Catalog
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Author : Rebecca J. Pardee
language : en
Publisher:
Release Date : 1989
Publications Of The National Institute Of Standards And Technology 1988 Catalog written by Rebecca J. Pardee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
High Voltage Test And Measuring Techniques
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Author : Wolfgang Hauschild
language : en
Publisher:
Release Date : 2019
High Voltage Test And Measuring Techniques written by Wolfgang Hauschild and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with TECHNOLOGY & ENGINEERING categories.
The new edition of this book incorporates the recent remarkable changes in electric power generation, transmission and distribution. The consequences of the latest development to High Voltage (HV) test and measuring techniques result in new chapters on Partial Discharge measurements, Measurements of Dielectric Properties, and some new thoughts on the Shannon Theorem and Impuls current measurements. This standard reference of the international high-voltage community combines high voltage engineering with HV testing techniques and HV measuring methods. Based on long-term experience gained by the authors the book reflects the state of the art as well as the future trends in testing and diagnostics of HV equipment. It ensures a reliable generation, transmission and distribution of electrical energy. The book is intended not only for experts but also for students in electrical engineering and high-voltage engineering.
High Voltage Test Techniques
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Author : Dieter Kind
language : en
Publisher: Elsevier
Release Date : 2001-01-24
High Voltage Test Techniques written by Dieter Kind and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-01-24 with Technology & Engineering categories.
The second edition of High Voltage Test Techniques has been completely revised. The present revision takes into account the latest international developments in High Voltage and Measurement technology, making it an essential reference for engineers in the testing field. High Voltage Technology belongs to the traditional area of Electrical Engineering. However, this is not to say that the area has stood still. New insulating materials, computing methods and voltage levels repeatedly pose new problems or open up methods of solution; electromagnetic compatibility (EMC) or components and systems also demand increased attention. The authors hope that their experience will be of use to students of Electrical Engineering confronted with High Voltage problems in their studies, in research and development and also in the testing field. - Benefit from a completely revised edition - Brings you up-to-date with th latest international developments in High Voltage and Measurement technology - An essential reference for engineers in the testing field
Measurement Of Partial Discharges In Power Transformers Using Electromagnetic Signals
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Author : Sebastian Coenen
language : en
Publisher: BoD – Books on Demand
Release Date : 2012
Measurement Of Partial Discharges In Power Transformers Using Electromagnetic Signals written by Sebastian Coenen and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
The Gauge Block Handbook
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Author : Ted Doiron
language : en
Publisher: Createspace Independent Publishing Platform
Release Date : 2014-02-19
The Gauge Block Handbook written by Ted Doiron and has been published by Createspace Independent Publishing Platform this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-02-19 with Science categories.
This handbook is a both a description of the current practice at the National Institute of Standards and Technology, and a compilation of the theory and lore of gauge block calibration. Most of the chapters are nearly self-contained so that the interested reader can, for example, get information on the cleaning and handling of gauge blocks without having to read the chapters on measurement schemes or process control, etc. This partitioning of the material has led to some unavoidable repetition of material between chapters. The basic structure of the handbook is from the theoretical to the practical. Chapter 1: basic concepts and definitions of length and units; Chapter 2: history of gauge blocks, appropriate definitions and a discussion of pertinent national and international standards; Chapter 3: physical characteristics of gauge blocks, including thermal, mechanical and optical properties; Chapter 4: a description of statistical process control (SPC) and measurement assurance (MA) concepts; and Chapters 5 and 6: details of the mechanical comparisons and interferometric techniques used for gauge block calibrations. Full discussions of the related uncertainties and corrections are included. Finally, the appendices cover in more detail some important topics in metrology and gauge block calibration.
International Aerospace Abstracts
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Author :
language : en
Publisher:
Release Date : 1965
International Aerospace Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Aeronautics categories.