SIST EN 62567:2014
(Main)Overhead lines – Methods for testing self-damping characteristics of conductorsMethods for testing self-damping characteristics of conductors (IEC 62567:2013)
Overhead lines – Methods for testing self-damping characteristics of conductorsMethods for testing self-damping characteristics of conductors (IEC 62567:2013)
The scope of this Standard is to provide test procedures based on the above-mentioned documents 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.
Freileitungen - Methoden zur Prüfung der Eigendämpfungseigenschaften von Leitern (IEC 62567:2013)
Lignes électriques aériennes – Méthodes d'essai des caractéristiques d'autoamortissement des conducteurs (CIE 62567:2013)
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
Nadzemni vodi - Metode za preskušanje karakteristik lastnega dušenja vrvnih vodnikov (IEC 62567:2013)
Namen tega standarda je zagotoviti preskusne postopke, ki so osnovani na zgoraj omenjenih dokumentih in katerih namen je omejitev vzrokov za neskladje med rezultati preskusov, pri čemer upošteva bogate izkušnje, ki so jih v zadnjih 30 letih pridobili testni inženirji in ki so zbrane v literaturi, vključno s tehnično brošuro CIGRE, ki se nanaša predvsem na ta standard (glej poglavje Bibliografija). Ta standard opisuje metodologije, vključno z aparati, postopki in mejami, ki se uporabljajo za merjenje lastnega dušenja vrvnih vodnikov in za oblike zmanjševanja podatkov. Poleg tega zagotavlja osnovne smernice, ki morebitnega uporabnika obvestijo o prednostih in slabostih opisane metode. Metodologije in postopki, vključeni v tem standardu, se lahko uporabljajo samo za testiranje v notranjih laboratorijskih prostorih.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 62567:2014
01-julij-2014
Nadzemni vodi - Metode za preskušanje karakteristik lastnega dušenja vrvnih
vodnikov (IEC 62567:2013)
Overhead lines – Methods for testing self-damping characteristics of conductorsMethods
for testing self-damping characteristics of conductors (IEC 62567:2013)
Freileitungen - Methoden zur Prüfung der Eigendämpfungseigenschaften von Leitern
(IEC 62567:2013)
Lignes électriques aériennes – Méthodes d'essai des caractéristiques
d'autoamortissement des conducteurs (CIE 62567:2013)
Ta slovenski standard je istoveten z: EN 62567:2013
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 62567:2014 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 62567:2014
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SIST EN 62567:2014
EUROPEAN STANDARD
EN 62567
NORME EUROPÉENNE
November 2013
EUROPÄISCHE NORM
ICS 29.060; 29.240.20
English version
Overhead lines -
Methods for testing self-damping characteristics of conductors
(IEC 62567:2013)
Lignes électriques aériennes - Freileitungen -
Méthodes d'essai des caractéristiques Methoden zur Prüfung der
d'auto-amortissement des conducteurs Eigendämpfungseigenschaften von
(CEI 62567:2013) Leitern
(IEC 62567:2013)
This European Standard was approved by CENELEC on 2013-10-17. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels
© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62567:2013 E
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SIST EN 62567:2014
EN 62567:2013 - 2 -
Foreword
The text of document 7/629/FDIS, future edition 1 of IEC 62567, prepared by IEC/TC 7 "Overhead
electrical conductors" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC
as EN 62567:2013.
The following dates are fixed:
(dop) 2014-07-17
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2016-10-17
standards conflicting with the
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.
Endorsement notice
The text of the International Standard IEC 62567:2013 was approved by CENELEC as a European
Standard without any modification.
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SIST EN 62567:2014
- 3 - EN 62567:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
IEC 60050-466 1990 International electrotechnical vocabulary - -
(IEV) -
Chapter 466: Overhead lines
IEEE Std. 563 1978 IEEE Guide on conductor self-damping - -
measurements
IEEE Std. 664 1993 IEEE Guide for laboratory measurement of - -
the power dissipation characteristics of
aeolian vibration dampers for single
conductors
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SIST EN 62567:2014
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SIST EN 62567:2014
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
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN 62567:2014
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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
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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
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
OVERHEAD LINES – METHODS FOR TESTING SELF-DAMPING
CHARACTERISTICS OF CONDUCTORS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62567 has been prepared by IEC technical committee 7: Overhead
electrical conductors.
The text of this standard is based on the following documents:
FDIS Report on voting
7/629/FDIS 7/630/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
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SIST EN 62567:2014
62567 © IEC:2013 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
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SIST EN 62567:2014
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INTRODUCTION
Conductor self-damping is a physical characteristic of the conductor that defines its capacity
to dissipate energy internally while vibrating. For conventional stranded conductors, energy
dissipation can be attributed partly to inelastic effects within the body of the wires (hysteresis
damping at the molecular level) but mostly to frictional damping, due to small relative
movements between overlapping individual wires, as the conductor flexes with the vibration
wave shape.
Self-damping capacity is an important characteristic of the conductors for overhead
transmission lines. This parameter is a principal factor in determining the response of a
conductor to alternating forces induced by the wind.
As the conductor self-damping is generally not specified by the manufacturer, it can be
determined through measurements performed on a laboratory test span. Semi-empirical
methods to estimate the self-damping parameters of untested conventional stranded
conductors are also available but often lead to different results. Further, a great variety of new
conductor types is increasingly used on transmission lines and some of them may have self-
damping characteristics and mechanisms different from the conventional stranded conductors.
A “Guide on conductor self-damping measurements” was prepared jointly in the past by the
IEEE Task Force on Conductor Vibration and CIGRE SC22 WG01, to promote uniformity in
measuring procedures. The Guide was published by IEEE as Std. 563-1978 and also by
CIGRE in Electra n°62-1979.
Three main methods are recognized in the above documents and divided into two main
categories which are usually referred to as the "forced vibration" and ''free vibration" methods.
The first forced vibration method is the “Power [Test] Method” in which the conductor is forced
into resonant vibrations, at a number of tunable harmonics, and the total power dissipated by
the vibrating conductor is measured at the point of attachment to the shaker.
The second forced vibration method, known as the “Standing Wave Method” or more precisely
“Inverse Standing Wave Ratio [Test] Method” (ISWR), determines the power dissipation
characteristics of a conductor by the measurement of antinodal and nodal amplitudes on the
span, for a number of tunable harmonics.
The free vibration method named “Decay [Test] Method” determines the power dissipation
characteristics of a conductor by measuring, at a number of tunable harmonics, the decay rate
of the free motion amplitude following a period of forced vibration.
Several laboratories around the world have performed conductor self-damping measurements
in accordance with the above mentioned Guide. However, large disparities in self-damping
predictions have been found among the results supplied by the various laboratories. The
causes of these disparities have been identified into five main points:
1) The different test methods adopted for the self-damping measurements.
2) The different span end conditions set up in the various test laboratories (rigid clamps,
flexure members, etc.)
3) The different types of connection between the shaker and the conductor (rigid or flexible)
and the different location of the power input point along the span.
4) The different conductor conditioning before the test (creep, running in, etc.)
5) The different manufacturing processes of the conductor.
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62567 © IEC:2013 – 7 –
OVERHEAD LINES – METHODS FOR TESTING SELF-DAMPING
CHARACTERISTICS OF CONDUCTORS
1 Scope
The scope of this Standard is to provide test procedures based on the above-mentioned
documents 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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050-466:1990, International Electrotechnical Vocabulary. Chapter 466: Overhead lines
IEEE Std. 563-1978, IEEE Guide on conductor self-damping measurements
IEEE Std. 664-1993, IEEE Guide for laboratory measurement of the power dissipation
characteristics of aeolian vibration dampers for single conductors
3 Terms and definitions
For the purpose of this International Standard, the definitions of the International
Electrotechnical Vocabulary (IEV) apply, in particular IEC 60050-466. Those which differ or do
not appear in the IEV are given below.
3.1
conductor self-damping:
the self-damping of a conductor subjected to a tensile load T is defined by the power P
c
dissipated per unit length by the conductor vibrating in a natural mode, with a loop length λ/2,
an antinode displacement amplitude Y and a frequency f
0
3.2
node
in a vibrating conductor, nodes are the points in which the vibration amplitude is the smallest
3.3
anti-node
in a vibrating conductor, anti-nodes are the points in which the vibration amplitude is the
greatest
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4 Symbols and units
2
A
forcing point transverse acceleration, single amplitude m/s
th
a vibration amplitude at the n node mm
n
D,d diameter of the conductor m
δ logarithmic decrement
E total energy dissipated by the vibrating conductor Joule
diss
E total kinetic energy of the vibrating conductor Joule
kin
F single amplitude exciting force N
f vibration frequency Hz
h non dimensional viscous damping coefficient
L free length of the test span m
λ wavelength m
λ/2 loop length m
m conductor mass per unit length kg/m
n number of vibrating loops in the span
n number of vibration cycles
c
n
number of loops between loop k and loop j
kj
P power dissipated by the conductor mW
P power dissipated by the conductor per unit length mW/m
c
P power dissipated by the conductor, measured at loop j mW
j
P power dissipated by the conductor, measured at loop k mW
k
θ phase angle between force and acceleration deg
a
θ phase angle between force and displacement deg
d
θ phase angle between force and velocity deg
v
S Inverse standing wave ratio (ISWR) at loop j
j
S Inverse standing wave ratio (ISWR) at loop k
k
th
S
Inverse standing wave ratio (ISWR) at the n loop
n
T conductor tension N
V forcing point transverse velocity, single amplitude m/s
th
V vibration velocity at the n antinode – peak value m/s
n
circular frequency rad
ω
Y
single antinode amplitude at the first decay cycle mm
a
Y vibration single amplitude at the driving point mm
f
th
Y vibration single amplitude at the n antinode mm
n
Y vibration single amplitude at antinode mm
o
Y
z single antinode amplitude at the last decay cycle mm
Tm
characteristic impedance of the conductor N s/m
5 Test span arrangements
5.1 General
The laboratory test spans for conductor self-damping measurements are generally built indoor
in still air areas where the variation of ambient temperature is minimal or can be suitably
controlled. Ambient temperature variations up to 0,2 °C/h are considered acceptable.
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The free span length L should preferably be at least ten times longer than the longest loop
length used in the tests. For consistent results, a span length greater than 40m is
recommended but satisfactory results can be obtained with spans in the range of 30m. For
shorter spans, the influence of the termination losses and the distribution of the tensile load
between the conductor strands may be critical.
The test span shall be strung between two massive blocks with a weight not lower than 10 per
cent of the ultimate tensile strength of the largest conductor to be tested. Each block should
be a single piece, generally made of steel reinforced concrete, and preferably be common or
solidly connected with the concrete floor. The stiffness of these blocks should be as high as
possible in order to minimize the losses and provide the maximum reflexion of the waves.
An example of laboratory test span layout is shown in Figure 1.
IEC 2187/13
Figure 1 – Test span for conductor self-damping measurements
5.2 Span terminations
The test span should have the capability of maintaining a constant conductor tension.
Hydraulic and pneumatic cylinders, springs, threaded bars and pivotal balance beams have
been used successfully.
A rigid non-articulating square faced clamp similar to that shown in Figure 2 shall be used to
minimize energy dissipation by the termination fixture. An example of a typical termination
design is also provided in Figure 3 of IEEE Std. 563-1978. Terminating fixtures and rigid
clamps shall be of sufficient stiffness to ensure that energy losses do not occur beyond the
extremities of the free span.
Rigid end clamps (also called heavy clamps), equal to or up to ten times longer than the
conductor diameters and with groove diameters not exceeding by more than 0,25 mm the
diameter of the conductor, have given good results. Generally, the clamp groove is
dimensioned for the biggest conductor to be tested and a set of sleeves is made available to
accommodate smaller conductor diameters.
The rigid clamps shall not be used to maintain tension on the span. However, the rigid
clamps, once closed, will retain some load. Consequently, the tension devices cannot fully
control the conductor tension. Subsequent adjustments, if necessary, shall be performed only
after releasing the rigid clamps.
It is very important to have a good alignment between tension clamps and rigid clamps in the
horizontal direction. In the vertical direction, in order to eliminate the static bending of
conductor at the rigid clamp departure, it may be necessary to incline the rigid clamps
following the catenary angle. This practice, when necessary, would avoid any change in
tensile load when closing or opening the clamps.
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IEC 2188/13
Figure 2 – Rigid clamp
On a laboratory test span, normally, the wave shape of the end loops differs from the shape of
the free loops and the end loop dissipation is greater than free loop dissipation. As the energy
dissipation of the conductor is, to a first approximation, proportional to the square of its
curvature, it is easy to explain the large dissipation of energy near the end of the span. The
effect is more noticeable at low frequencies where the end loops constitute a higher
proportion of the total number of loops. It further restricts the usefulness of very short indoor
test spans.
Preference should be given to a test arrangement which would minimize energy dissipation at
the span end terminations. If there is uncertainty about this, the energy should be assessed
and eventually accounted for, unless using the ISWR method.
The termination losses may be minimized by terminating the conductor by a flexure member,
such as a wide, flat bar of sufficient strength to accommodate the span tension but also
flexible enough in the vertical direction to allow it to bend readily and to avoid bending the
conductor through a sharp radius of curvature where it would normally enter the clamp. This
procedure has the undesirable effect, though, of including the end termination in the test span.
An example of flexible cantilever is provided in Figure 4 of IEEE Std. 563-1978.
5.3 Shaker and vibration control system
The vibration exciter used for these tests is generally an electro-dynamic shaker (Figure 3).
Hydraulic actuators are also used.
Modal shakers having light armature and linear bearings can be us
...
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