Summary
In the field of rotating electrical machines, the Dielectric Dissipation Factor (DDF) measurement is used for assessing the condition of an EIS and the consistency in the manufacturing quality of individual stator bars/coils and stator windings. The technical brochure provides the analysis of 4466 measurement sets with DDF results on 2330 stator windings. The records received were analysed in relation to possible DDF influence factors, such as rated voltage, core length, machine type, pole number, insulation system, binder system, year of manufacture and age factors. The spread in DDF measurement results of stator windings, the development of the results, as a function of age of the winding, was assessed.
Table of content
Executive summary
Contents
1. Introduction
1.1. Purpose
1.2. Target
1.3. Background
2. Approach
2.1. Introduction
2.2. Key parameters
2.3. Influence factors
2.4. How to deal with all results
2.5. Creating an Excel data file
3. Inventory collected data
3.1. Introduction
3.2. Key parameters
3.3. Distribution in relation to influence factors
4. First reflection and some observations
4.1. Starting value
4.2. Tip-up
4.3. Value Δtanδ0,2max
4.4. General correlation
4.5. Summary
5. Analysis results - new versus existing windings
5.1. Introduction
5.2. Phase to phase comparison
5.3. Machine type
5.4. Pole number
5.5. Core length
5.6. Insulation system
5.7. Binder system
5.8. Rated voltage
5.9. Year of manufacture
5.10. Age
5.11. Manufacturer
5.12. Summary
6. Trend analysis windings with more measurement results
6.1. Introduction
6.2. General analysis
6.3. Outlier analysis
6.4. Machine type
6.5. Core length
6.6. Type of insulation system
6.7. Binder system
6.8. Rated voltage
6.9. Manufacturer
6.10. Temperature
7. Summary
8. Conclusions
APPENDIX A. Definitions and abbreviations
A.1. General terms
A.2. Specific terms
APPENDIX B. Links and references
APPENDIX C. Questionnaires
C.1. Questionnaire for owners
C.2. Questionnaire for manufacturers
C.3. Questionnaire for testing organisations
APPENDIX D. Inventory
D.1. Distribution measurement and datasets versus to influence factor
D.2. Available 3 phase measurement sets with starting value
D.3. Available 3 phase measurement sets with tip-up value
D.4. Available 3 phase measurement sets with ∆tanδ0,2max
D.5. Available complete winding measurement sets with starting value
D.6. Available complete windings measurement sets with tip-up value
D.7. Available complete windings measurement sets with ∆tanδ0,2max
APPENDIX E. Core length estimation
APPENDIX F. Outliers analysis EIS
F.1. Outliers DDF results newly manufactured windings
F.2. Outliers DDF results in-service windings
APPENDIX G. Outliers binder system
G.1. Outliers DDF results newly manufactured windings
G.2. Outliers DDF results in-service windings
APPENDIX H. Trend graphs
H.1. Trend graphs windings stators core length < 1 m
H.2. Trend graphs windings stators core length 1 – 2 m
H.3. Trend graphs windings stators core length 2 – 3 m
H.4. Trend graphs windings stators core length 3 – 5 m
H.5. Trend graphs windings stators core length > 5 m
H.6. Trend graphs windings stators core length “unknown”
APPENDIX I.
I.1. Figures and Illustrations
I.2. Tables
Additional informations
| Publication type | Technical Brochures |
|---|---|
| Reference | 1003 |
| Publication year | |
| Publisher | CIGRE |
| ISBN | 978-2-85873-708-6 |
| Study committees | |
| Working groups | WG A1.70 |
| File size | 15 MB |
| Pages number | 188 |
| Price for non member | 300 € |
| Price for member | Free |
Authors
M.G. KRIEG-WEZELENBURG, Convenor (NL)
J.H. KRIEG (NL), H. HATANO (JP), X. CHEN (NL), T. FUJIWARA (JP), G. LEMESCH (AT), R. LUDLOW (UK), F. ÖTTL (AT), I. SIMMONDS (UK), A. SHAIKH (CA), G. VELASQUEZ (US), A. PICCOLO (IT), H. ZHU (US), A. HERRERA (DE), M. BRČIĆ (HR)
Supporting Members
A.M.H. KRIEG (NL), H. SEDDING (CA), G. SCHMIDT (DE), R. TREMBLAY (CA), J. WEIDNER (DE), D. ILIC (RS), T. TRAN (AU), D. JOVANOVIC (RS), P. WIEHE (AU), O. MONTANO (US), C. YANG (CN), R. MESSEL (US), A. VILLARRUBIA (SP), T. HILDINGER (BR), L. IMAIZUMI (BR)
Keywords
Dielectric Dissipation Factor, Electrical Insulation Systems, Rotating Electrical Machines, Stator Windings
