Overhead lines - Methods for testing self-damping characteristics of conductors

IEC 62567:2013 provides test procedures based on the documents mentioned in the introduction and devoted to minimize the causes of discrepancy between test results, taking into consideration the large experience accumulated in the last 30 years by numerous test engineers and available in literature, including a CIGRE Technical Brochure specifically referring to this standard (see Bibliography). This Standard describes the current methodologies, including apparatus, procedures and accuracies, for the measurement of conductor self-damping and for the data reduction formats. In addition, some basic guidance is also provided to inform the potential user of a given method's strengths and weaknesses. The methodologies and procedures incorporated in this Standard are applicable only to testing on indoor laboratory spans. Key words: Overhead lines, Self-damping, Conductors

Lignes électriques aériennes - Méthodes d'essai des caractéristiques d'auto-amortissement des conducteurs

La CEI 62567:2013 recouvre la fourniture de procédures d'essai basées sur les documents mentionnés ci-dessus et dont le but est de minimiser les causes de divergence entre les résultats d'essais, en tenant compte de la grande expérience accumulée ces 30 dernières années par un grand nombre d'ingénieurs d'essai, et disponible dans les documentations, incluant une brochure technique du CIGRÉ se référant spécifiquement à cette norme (voir la Bibliographie). La présente Norme décrit les méthodologies actuelles, incluant les appareils, modes opératoires et précisions, pour la mesure de l'auto-amortissement d'un conducteur et pour les formats de réduction de données. De plus, certaines directives fondamentales sont également fournies pour informer l'utilisateur potentiel des forces et des faiblesses d'une méthode donnée. Les méthodologies et les modes opératoires incorporés dans la présente Norme ne sont applicables qu'à un essai sur des portées de laboratoire intérieures. Mots-clés: Lignes électriques aériennes, Auto-amortissement, Conducteurs

General Information

Status
Published
Publication Date
11-Sep-2013
Current Stage
PPUB - Publication issued
Start Date
30-Sep-2013
Completion Date
12-Sep-2013
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IEC 62567:2013 - Overhead lines - Methods for testing self-damping characteristics of conductors
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IEC 62567 ®
Edition 1.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Overhead lines – Methods for testing self-damping characteristics of conductors

Lignes électriques aériennes – Méthodes d'essai des caractéristiques d'auto-
amortissement des conducteurs
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IEC 62567 ®
Edition 1.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Overhead lines – Methods for testing self-damping characteristics of

conductors
Lignes électriques aériennes – Méthodes d'essai des caractéristiques d'auto-

amortissement des conducteurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX W
ICS 29.060; 29.240.20 ISBN 978-2-8322-1056-7

– 2 – 62567 © IEC:2013
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and units . 8
5 Test span arrangements . 8
5.1 General . 8
5.2 Span terminations . 9
5.3 Shaker and vibration control system . 10
5.4 Location of the shaker . 12
5.5 Connection between the shaker and the conductor under test . 12
5.5.1 General . 12
5.5.2 Rigid connection . 13
5.5.3 Flexible connection . 14
5.6 Transducers and measuring devices . 14
5.6.1 Type of transducers . 14
5.6.2 Transducer accuracy . 15
6 Conductor conditioning . 16
6.1 General . 16
6.2 Clamping . 16
6.3 Creep . 16
6.4 Running-in . 16
7 Extraneous loss sources . 16
8 Test procedures . 17
8.1 Determination of span resonance . 17
8.2 Power Method . 18
8.3 ISWR Method . 20
8.4 Decay method . 22
8.5 Comparison between the test methods . 24
8.6 Data presentation . 25
Annex A (normative) Recommended test parameters . 27
Annex B (informative) Reporting recommendations . 28
Annex C (informative) Correction for aerodynamic damping . 31
Annex D (informative) Correction of phase shift between transducers . 33
Bibliography . 34

Figure 1 – Test span for conductor self-damping measurements . 9
Figure 2 – Rigid clamp . 10
Figure 3 – Electro-dynamic shaker . 11
Figure 4 – Layout of a test stand for conductor self-damping measurements . 12
Figure 5 – Example of rigid connection . 13
Figure 6 – Example of flexible connection . 14
Figure 7 – Miniature accelerometer . 15

62567 © IEC:2013 – 3 –
Figure 8 – Resonant condition detected by the acceleration and force signals . 18
Figure 9 – Fuse wire system disconnecting a shaker from a test span; this double
exposure shows the mechanism both closed and open. . 23
Figure 10 – A decay trace . 24
Figure B.1 – Example of conductor power dissipation characteristics . 29
Figure B.2 – Example of conductor power dissipation characteristics . 30

Table 1 – Comparison of laboratory methods . 25
Table 2 – Comparison of Conductor Self-damping Empirical Parameters . 26
Table C.1 – Coefficients to be used with equation C-3 . 32

– 4 – 62567 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OVERHEAD LINES – METHODS FOR TESTING SELF-DAMPING
CHARACTERISTICS OF CONDUCTORS
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