Summary
Read more on ELECTRAPart E – Measurements and design data
The reliable and safe operation of the transformer requires that the dielectric stresses imposed by transient overvoltages are kept within acceptable limits. The development of models for electromagnetic transient simulations (white-box, black-box, grey-box) has been hampered by lack of transformer design data and measurements for model validation. JWG A2/C4.52 has performed measurements on two 3-winding power transformers, a 1-ph unit and a 3-ph unit. Frequency sweep measurements of terminal admittance were performed with respect to external terminals. Similar measurements were made of voltage transfer between external terminals, and from external terminals to three points in the regulating winding. Lightning impulse responses in the time domain were calculated from the frequency domain voltage transfer functions via rational fitting and convolution. The detailed design data and measurements are described in this TB, and the data files are available on an open web site. That way, manufacturers and others can validate and improve their transformer modeling programs. This TB is one of five TBs from the JWG.
Table of content
1. Introduction
1.1. Background, JWG activities, results
1.2. Transformer measurements and design details
1.3. Overview of Brochure Content
1.4. Acknowledgements
2. Transformer Units
3. Measurement approach
3.1. Transformer condition
3.2. Voltage transfer measurements
3.3. Admittance measurements
4. Measurements on 3-ph transformer
4.1. Internal and External connections
4.2. Voltage transfer measurements
4.3. Checking for erroneous connections
4.4. Admittance measurements
5. Measurements on 1-ph transformer
5.1. Internal and external connections
5.2. Voltage transfer measurements
5.3. Admittance measurements
6. Measurement Data files
6.1. Voltage transfer measurements
6.2. Admittance measurements
6.3. Download site
7. Comparison between measurements and white-box model simulations
7.1. time domain voltage responses
7.2. Frequency domain admittance matrix elements
7.3. Analysis of results
7.4. Time domain calculation data files
7.5. Frequency domain calculation data files
8. Design details of 3-ph transformer
8.1. Electrical Characteristics
8.2. Core – “Three-Legs Core-Type”
8.3. TV Winding – Stabilizing Winding – “Helical Type”
8.4. LV Winding – “Helical Type”
8.5. HV Principal Winding – “Continuous Disk Type”
8.6. RW Regulating Winding – “Multi-start Type”
8.7. Core & Windings Layout
8.8. Tank – “Rectangular with Radiators”
8.9. Tertiary Reactor
8.10. Losses and Impedance Measured in Factory Acceptance Tests (FAT)
8.11. Permittivities
8.12. Nodes and Branches Numbering for Single Phase Modelling
8.13. Nodes and Branches Numbering for Three Phase Modelling
9. Design details of 1-ph transformer
9.1. Electrical Characteristics
9.2. Core – “1 Wound Leg with 2 Return Legs Core-Type”
9.3. TV Winding – “Helical Type”
9.4. LV Winding – “Continuous Disk Type”
9.5. HV Principal Winding – “Interleaved Disk Type”
9.6. RW Regulating Winding – “Interleaved Disk Type”
9.7. Core & Windings Layout
9.8. Tank – “Rectangular with Radiators”
9.9. Losses and Impedance Measured in Factory Acceptance Tests (FAT)
9.10. Permittivities
9.11. Nodes and Branches Numbering
10. recommendations
11. References
Appendix A Impulse Plots for 3-ph transformer
Appendix B impulse plots for 1-ph transformer
Additional informations
| Publication type | Technical Brochures |
|---|---|
| Reference | 904 |
| Publication year | |
| Publisher | CIGRE |
| ISBN | 978-2-85873-609-6 |
| Study committees |
|
| Working groups | JWG A2/C4.52 |
| File size | 15 MB |
| Pages number | 140 |
| Price for non member | 260 € |
| Price for member | Free |
Authors
Bjørn Gustavsen, Convenor (NO), Angelica Rocha, Secretary (BR),
Alvaro Portillo (UY), Andrzej Holdyk (NO), Anniyappan Palani (DE), Baudilio Valecillos (CH), Behzad Kordi (CA), Bogdan Andriienko (UA), Carlos González-García (ES), Casimiro Álvarez-Mariño (ES), Daniil Matveev (RU), Davor Vujatovic (UK), Ebrahim Rahimpour (DE), Enrique Mombello (AR), Esteban Portales (CA), Federico Portillo (UY), Guillermo Andrés Díaz Flórez (CO), Gustavo H. C. Oliveira (BR), Hans De Herdt (BE), Hans Kristian Høidalen (NO), Ji-Hong Kim (KR), Jos Veens (NL), Jose Carlos Mendes (BR), José Francisco Lofrano (BR), Juliano Montanha (BR), Luiz Fernando de Oliveira (BR), Marc-Olivier Roux (CA), Maxym Ostrenko (UA), Michel Rioual (FR), Mikhail Frolov (RU), Oliver Sterz (DE), Ricardo Castro Lopes (PT), Robert Degeneff (US), Rodrigo Ronchi (MX), Rogerio Azevedo (BR), Shikin Jamil (UK), Tobias Röhrl (DE), Triomphant Ngnegueu (FR), Xosé López-Fernández (ES)
Keywords
power transformers, reactors, power systems, technical performance
Other parts
- High-Frequency Transformer and Reactor Models for Network Studies - Part A: White-Box Models
- High-Frequency Transformer and Reactor Models for Network Studies - Part D: Model interfacing and specifications
- High-Frequency Transformer and Reactor Models for Network Studies - Part B: Black-Box Models
- High-Frequency Transformer and Reactor Models for Network Studies - Part C: Grey Box Models
