IEC/TR 61000-3-14

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) 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.

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

Ta del standarda IEC 61000, ki je informativne narave, zagotavlja napotke za načela, ki jih je mogoče uporabiti kot osnovo za določanje zahtev za priklop motečih naprav v nizkonapetostna (NN) elektroenergetska omrežja. Moteča naprava je za namene tega dela standarda IEC 61000 naprava (ki je lahko obremenitev ali generator), ki proizvaja motnje – harmoniki in/ali medharmoniki, nihanja napetosti in/ali hitre spremembe napetosti in/ali neravnotežje napetosti. Glavni cilj je operaterjem ali lastnikom sistema zagotoviti napotke za inženirske prakse, kar bo olajšalo zagotavljanje ustrezne kakovosti storitev za vse priklopljene naprave strank. Namen tega poročila v okviru obravnavanja naprav ni nadomestitev standardov opreme za oddajne meje.

General Information

• Status: Not Published
• ICS: 33.100.10 - Emission
• Technical Committee: SC 77A - EMC - Low frequency phenomena
• Current Stage: PPUB - Publication issued
• Start Date: 20-Oct-2011
• Ref Project: SIST-TP IEC/TR 61000-3-14:2013 - 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

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2013
(OHNWURPDJQHWQD]GUXåOMLYRVW(0&GHO2FHQDRGGDMQLKPHM]DKDUPRQLNH
PHGKDUPRQLNHQDSHWRVWQHVSUHPHPEHLQQHUDYQRWHåMH]DSULNORSPRWHþLKQDSUDY
Y11HOHNWURHQHUJHWVNDRPUHåMD
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
Ta slovenski standard je istoveten z: IEC/TR 61000-3-14
ICS:
33.100.10 Emisija Emission
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
®
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
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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
...