IEC TR 61000-3-14:2011

Electromagnetic compatibility (EMC) - Part 3-14: Assessment of emission limits for harmonics, interharmonics, voltage fluctuations and unbalance for the connection of disturbing installations to LV power systems

IEC TR 61000-3-14:2011 is a Technical Report which provides guidance on principles that can be used as the basis for determining the requirements for the connection of disturbing installations to low voltage (LV) public power systems. For the purposes of this part of IEC 61000, a disturbing installation means an installation (which may be a load or a generator) that produces disturbances: harmonics and/or interharmonics, voltage flicker and/or rapid voltage changes, and/or voltage unbalance. The primary objective is to provide guidance to system operators or owners for engineering practices, which will facilitate the provision of adequate service quality for all connected customer installations. In addressing installations, this report is not intended to replace equipment standards for emission limits. This report addresses the allocation of the capacity of the system to absorb disturbances. It does not address how to mitigate disturbances, nor does it address how the capacity of the system can be increased.

Compatibilité électromagnétique (CEM) - Partie 3-14: Evaluation des limites d'émission pour les harmoniques, les interharmoniques, les fluctuations et les déséquilibres de tension lors du raccordement d'installations perturbatrices aux réseaux d'alimentation à basse tension (BT)

IEC TR 61300-3-14:2011 est un Rapport Technique qui fournit des recommandations sur les principes qui peuvent être utilisés pour déterminer les exigences relatives au raccordement des installations perturbatrices aux réseaux publics d'alimentation à basse tension (BT). Pour les besoins de la présente partie de l'IEC 61000, une installation perturbatrice est une installation (qui peut être une charge ou un générateur) qui produit des perturbations: harmoniques et/ou interharmoniques, papillotement de la tension et/ou variations rapides de la tension, et/ou déséquilibres de tension. L'objectif principal est de fournir des recommandations aux gestionnaires ou propriétaires de réseaux pour les pratiques d'ingénierie, ce qui assure la qualité de la fourniture d'électricité pour l'ensemble des installations clientes raccordées. En ce qui concerne les installations, le présent rapport n'a pas pour objet de remplacer les normes d'appareils relatives aux limites d'émission. Le présent rapport traite de la répartition de la capacité du réseau à absorber les perturbations. Il n'explique pas comment atténuer les perturbations ni comment l'aptitude du réseau peut être augmentée.

Elektromagnetna združljivost (EMC) - 3-14. del: Ocena oddajnih mej za harmonike, medharmonike, napetostne spremembe in neravnotežje za priklop motečih naprav v NN elektroenergetska omrežja

General Information

• Status: Published
• Publication Date: 19-Oct-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 33.100.10 - Emission
• Technical Committee: SC 77A - EMC - Low frequency phenomena
• Drafting Committee: WG 8 - TC 77/SC 77A/WG 8
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2012
• Completion Date: 20-Oct-2011
• Ref Project: oSIST-TP IEC 61000-3-14 TR Ed.1.0:2013 - Electromagnetic compatibility (EMC) - Part 3-14: Assessment of emission limits for the connection of disturbing installations to LV power systems

Standards Content (Sample)

IEC/TR 61000-3-14 ®
Edition 1.0 2011-10
TECHNICAL
REPORT
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 3-14: Assessment of emission limits for harmonics, interharmonics, voltage
fluctuations and unbalance for the connection of disturbing installations to LV
power systems
IEC/TR 61000-3-14:2011(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by
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IEC/TR 61000-3-14 ®
Edition 1.0 2011-10
TECHNICAL
REPORT
BASIC EMC PUBLICATION
Electromagnetic compatibility (EMC) –
Part 3-14: Assessment of emission limits for harmonics, interharmonics, voltage
fluctuations and unbalance for the connection of disturbing installations to LV
power systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XD
ICS 33.100.10 ISBN 978-2-88912-742-9

– 2 – TR 61000-3-14  IEC:2011(E)
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 11
4 Basic EMC concepts . 18
4.1 General . 18
4.2 Compatibility levels . 18
4.2.1 General . 18
4.2.2 Harmonics . 18
4.2.3 Interharmonics. 19
4.2.4 Voltage fluctuations . 20
4.2.5 Unbalance . 20
4.3 Planning levels . 20
4.3.1 Indicative values of planning levels. 20
4.3.2 Assessment procedure for evaluation against planning levels . 21
4.4 Illustration of EMC concepts . 22
4.5 Emission levels . 23
5 General principles . 24
5.1 General . 24
5.2 Stage 1: simplified evaluation of disturbance emission . 24
5.3 Stage 2: emission limits relative to actual system characteristics. 25
5.4 Stage 3: acceptance of higher emission levels on a conditional basis . 25
5.5 Responsibilities . 26
6 General guidelines for the assessment of emission levels . 26
6.1 Point of evaluation. 26
6.2 Concept of emission level . 26
6.3 Operating conditions . 27
6.4 System impedance characteristics . 28
7 General summation law . 28
7.1 General . 28
7.2 For harmonics . 29
7.3 For flicker and rapid voltage changes . 29
7.4 For voltage unbalance . 29
8 Harmonic emission limits for distorting installations in LV systems . 30
8.1 Stage 1: simplified evaluation of disturbance emission . 30
8.2 Stage 2: emission limits relative to actual system characteristics. 31
8.2.1 General . 31
8.2.2 Global emission to be shared between the customers . 31
8.2.3 Individual emission limits . 32
8.2.4 Alternative methods for stage 2 . 34
8.3 Stage 3: acceptance of higher emission levels on a conditional basis . 34
8.4 Emission limits for interharmonics . 34
9 Voltage fluctuation emission limits for installations in LV systems . 35
9.1 Stage 1: simplified evaluation of disturbance emission . 35

TR 61000-3-14  IEC:2011(E) – 3 –
9.2 Stage 2: emission limits relative to actual system characteristics. 36
9.2.1 General . 36
9.2.2 Global emission to be shared between the customers' installations . 36
9.2.3 Individual emission limits . 37
9.3 Stage 3: acceptance of higher emission levels on a conditional basis . 38
9.4 Rapid voltage changes . 38
9.4.1 General considerations . 38
9.4.2 Emission limits . 39
10 Unbalance emission limits for unbalanced installations in LV systems . 39
10.1 General . 39
10.2 Stage 1: simplified evaluation of disturbance emission . 39
10.3 Stage 2: emission limits relative to actual system characteristics. 40
10.3.1 General . 40
10.3.2 Global emission to be shared between the sources of unbalance . 40
10.3.3 Individual emission limits . 41
10.4 Stage 3: acceptance of higher emission levels on a conditional basis . 43
11 Summary diagrams of the evaluation procedure . 43
Annex A (informative) Example of application of the general method for the derivation
of limits for a specific type of LV networks . 47
Annex B (informative) Example of application of the general method for the calculation
of emission limits for a specific installation . 59
Annex C (informative) Harmonic emission limits at stage 2 . 64
Annex D (informative) Calculation of the reduction factors for harmonics and
unbalance . 77
Annex E (informative) Example of method to allocate harmonic emission limits at
stage 3 . 88
Annex F (informative) Example of application of the approach presented in Annex E . 93
Annex G (informative) List of principal letter symbols, subscripts and symbols . 98
Bibliography . 102

Figure 1 – Illustration of basic voltage quality concepts with time/location statistics
covering the whole system . 22
Figure 2 – Illustration of basic voltage quality concepts with time statistics relevant to
one site within the whole system . 23
Figure 3 – Illustration of the emission vector U and its contribution to the measured
di
disturbance vector U at the point of evaluation . 27
d
Figure 4 – Simplified scheme of an LV public system for harmonics . 32
Figure 5 – Equivalent circuit and vector diagram for simple assessments . 38
Figure 6 – Example of rapid voltage change associated with motor starting . 38
Figure 7 – Simplified scheme of an LV public system for unbalance . 41
Figure 8 – Diagram of evaluation procedure for harmonics . 44
Figure 9 – Diagram of evaluation procedure for voltage fluctuations . 45
Figure 10 – Diagram of evaluation procedure for unbalance . 46
Figure A.1 – Simplified scheme of an LV public system for the calculation of harmonic
voltage levels . 51
Figure C.1 – Scheme of an LV public system . 65
Figure C.2 – Scheme of an LV public system in order to work out the global emission
to be shared between the customers . 66

– 4 – TR 61000-3-14  IEC:2011(E)
Figure C.3 – Simplified scheme of an LV public system in order to work out the
condition at the LV busbar . 68
Figure C.4 – Simplified scheme of an LV public system in order to work out the
condition for the LV feeder to which a large installation is connected . 71
Figure D.1 – General scheme of an LV public system . 78
Figure D.2 – Simplification of the general scheme of an LV public system for the
calculation of harmonic voltage levels at node Ni – 1st step . 79
Fi
...

IEC TR 61000-3-14 ®
Edition 1.0 2011-10
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM

Electromagnetic compatibility (EMC) –
Part 3-14: Assessment of emission limits for harmonics, interharmonics, voltage
fluctuations and unbalance for the connection of disturbing installations to LV
power systems
Compatibilité électromagnétique (CEM) –
Partie 3-14: Evaluation des limites d'émission pour les harmoniques, les
interharmoniques, les fluctuations et les déséquilibres de tension lors du
raccordement d'installations perturbatrices aux réseaux d'alimentation à basse
tension (BT)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et
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IEC TR 61000-3-14 ®
Edition 1.0 2011-10
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
BASIC EMC PUBLICATION
PUBLICATION FONDAMENTALE EN CEM

Electromagnetic compatibility (EMC) –

Part 3-14: Assessment of emission limits for harmonics, interharmonics,

voltage fluctuations and unbalance for the connection of disturbing

installations to LV power systems

Compatibilité électromagnétique (CEM) –

Partie 3-14: Evaluation des limites d'émission pour les harmoniques, les

interharmoniques, les fluctuations et les déséquilibres de tension lors du

raccordement d'installations perturbatrices aux réseaux d'alimentation à basse

tension (BT)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100.10 ISBN 978-2-8322-5299-4

– 2 – IEC TR 61000-3-14:2011  IEC 2011
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 10
3 Terms and definitions . 11
4 Basic EMC concepts . 18
4.1 General . 18
4.2 Compatibility levels . 18
4.2.1 General . 18
4.2.2 Harmonics . 18
4.2.3 Interharmonics. 19
4.2.4 Voltage fluctuations . 20
4.2.5 Unbalance . 20
4.3 Planning levels . 20
4.3.1 Indicative values of planning levels. 20
4.3.2 Assessment procedure for evaluation against planning levels . 21
4.4 Illustration of EMC concepts . 22
4.5 Emission levels . 23
5 General principles . 24
5.1 General . 24
5.2 Stage 1: simplified evaluation of disturbance emission . 24
5.3 Stage 2: emission limits relative to actual system characteristics. 25
5.4 Stage 3: acceptance of higher emission levels on a conditional basis . 25
5.5 Responsibilities . 26
6 General guidelines for the assessment of emission levels . 26
6.1 Point of evaluation. 26
6.2 Concept of emission level . 26
6.3 Operating conditions . 27
6.4 System impedance characteristics . 28
7 General summation law . 28
7.1 General . 28
7.2 For harmonics . 29
7.3 For flicker and rapid voltage changes . 29
7.4 For voltage unbalance . 29
8 Harmonic emission limits for distorting installations in LV systems . 30
8.1 Stage 1: simplified evaluation of disturbance emission . 30
8.2 Stage 2: emission limits relative to actual system characteristics. 31
8.2.1 General . 31
8.2.2 Global emission to be shared between the customers . 31
8.2.3 Individual emission limits . 32
8.2.4 Alternative methods for stage 2 . 34
8.3 Stage 3: acceptance of higher emission levels on a conditional basis . 34
8.4 Emission limits for interharmonics . 34
9 Voltage fluctuation emission limits for installations in LV systems . 35
9.1 Stage 1: simplified evaluation of disturbance emission . 35
9.2 Stage 2: emission limits relative to actual system characteristics. 36

9.2.1 General . 36
9.2.2 Global emission to be shared between the customers' installations . 36
9.2.3 Individual emission limits . 37
9.3 Stage 3: acceptance of higher emission levels on a conditional basis . 38
9.4 Rapid voltage changes . 38
9.4.1 General considerations . 38
9.4.2 Emission limits . 39
10 Unbalance emission limits for unbalanced installations in LV systems . 39
10.1 General . 39
10.2 Stage 1: simplified evaluation of disturbance emission . 39
10.3 Stage 2: emission limits relative to actual system characteristics. 40
10.3.1 General . 40
10.3.2 Global emission to be shared between the sources of unbalance . 40
10.3.3 Individual emission limits . 41
10.4 Stage 3: acceptance of higher emission levels on a conditional basis . 43
11 Summary diagrams of the evaluation procedure . 43
Annex A (informative) Example of application of the general method for the derivation
of limits for a specific type of LV networks . 47
Annex B (informative) Example of application of the general method for the calculation
of emission limits for a specific installation . 59
Annex C (informative) Harmonic emission limits at stage 2 . 64
Annex D (informative) Calculation of the reduction factors for harmonics and
unbalance . 77
Annex E (informative) Example of method to allocate harmonic emission limits at
stage 3 .
...