SIST EN IEC 62909-1:2018
(Main)Bi-directional grid connected power converters - Part 1: General requirements (IEC 62909-1:2017)
Bi-directional grid connected power converters - Part 1: General requirements (IEC 62909-1:2017)
This part of IEC 62909 specifies general aspects of bi-directional grid-connected power
converters (GCPC), consisting of a grid-side inverter with two or more types of DC-port
interfaces on the application side with system voltages not exceeding 1 000 V AC or
1 500 V DC. In special cases, a GCPC will have only one DC-port interface, which is
connected to a bidirectional energy-storage device. This document includes terminology,
specifications, performance, safety, system architecture, and test-case definitions. The
"system architecture" defines interaction between the inverter and converters. Requirements
which are common, general, and independent of special characteristics of individual
generators and bi-directional storages are defined.
This document does not cover uninterruptible power supply (UPS) systems, which fall under
the scope of IEC 62040 (all parts). Requirements for internal and external digital
communication might be necessary; the interface requirements including communication with
distributed energy resources are provided in a future part of IEC 62909. All EMC requirements
are defined by reference to existing IEC standards. External communication requirements are
out of scope of this document.
NOTE The control signal from the grid is not defined in this document.
Bi-direktionale netzgekoppelte Leistungsumrichter - Teil 1: Allgemeine Anforderungen (IEC 62909-1:2017)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1: Exigences générales (IEC 62909-1:2017)
L'IEC 62909-1:2017 spécifie les aspects généraux des convertisseurs de puissance connectés aux réseaux bidirectionnels (GCPC), composés d'un onduleur côté réseau avec plusieurs types d'interfaces d’accès en courant continu côté application avec des tensions systèmes qui ne dépassent pas 1 000 V en courant alternatif ou 1 500 V en courant continu. Dans certains cas particuliers, un GCPC ne disposera que d'une seule interface d’accès en courant continu, connectée à un dispositif de stockage d'énergie bidirectionnel. Le présent document inclut la terminologie, les spécifications, les performances, la sécurité, l'architecture système et les définitions de cas d'essai. Le terme "architecture système" recouvre les interactions entre l'onduleur et les convertisseurs. Les exigences définies sont les exigences communes, générales et indépendantes des caractéristiques spéciales applicables aux générateurs individuels et aux stockages bidirectionnels.
Le présent document ne couvre pas les systèmes d'alimentation sans interruption (ASI), qui relèvent du domaine d'application de l'IEC 62040 (toutes les parties). Des exigences pourraient être nécessaires pour les communications numériques internes et externes; les exigences d'interface, y compris pour les ressources énergétiques réparties, sont fournies dans une future partie de l'IEC 62909. Toutes les exigences CEM sont définies par rapport à des normes IEC existantes. Les exigences de communications externes ne sont pas couvertes par le domaine d'application du présent document.
Dvosmerni omrežni elektroenergetski pretvorniki - 1. del: Splošne zahteve (IEC 62909-1:2017)
Ta del standarda IEC 62909 določa splošne vidike dvosmernih omrežnih elektroenergetskih pretvornikov (GCPC), sestavljenih iz omrežnega razsmernika z dvema ali več vrstami vmesnikov na vhodih z enosmernim napajanjem in napetostjo, ki ne presega 1000 V izmeničnega toka in 1500 V enosmernega toka sistema. V posebnih primerih ima dvosmerni omrežni elektroenergetski pretvornik samo en vmesnik na vhodu z enosmernim napajanjem, ki je povezan z dvosmerno napravo za shranjevanje energije. Ta dokument vključuje opredelitve terminologije, specifikacij, delovanja, varnosti, sistemske arhitekture in preskusnih primerov. Izraz »sistemska arhitektura« opredeljuje razmerje med razsmernikom in pretvorniki. Opredeljene so skupne, splošne in neodvisne zahteve za posebne lastnosti posameznih generatorjev in dvosmernih shranjevalnih naprav.
Ta dokument ne obravnava sistemov za neprekinjeno napajanje (UPS), ki spadajo na področje uporabe standarda IEC 62040 (vsi deli). Morda so potrebne zahteve za notranjo in zunanjo digitalno komunikacijo; zahteve za vmesnik, ki vključujejo komunikacijo z distribuiranimi viri energije, so podane v prihodnjem delu standarda IEC 62909. Vse zahteve za elektromagnetno združljivost so opredeljene s sklicem na obstoječe standarde IEC. Zahteve za zunanjo komunikacijo ne spadajo na področje uporabe tega dokumenta.
OPOMBA: Kontrolni signal omrežja ni opredeljen v tem dokumentu.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN IEC 62909-1:2018
01-oktober-2018
Dvosmerni omrežni elektroenergetski pretvorniki - 1. del: Splošne zahteve (IEC
62909-1:2017)
Bi-directional grid connected power converters - Part 1: General requirements (IEC
62909-1:2017)
Bi-direktionale netzgekoppelte Leistungsumrichter - Teil 1: Allgemeine Anforderungen
(IEC 62909-1:2017)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1:
Exigences générales (IEC 62909-1:2017)
Ta slovenski standard je istoveten z: EN IEC 62909-1:2018
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
SIST EN IEC 62909-1:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN IEC 62909-1:2018
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SIST EN IEC 62909-1:2018
EUROPEAN STANDARD EN IEC 62909-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2018
ICS 29.200
English Version
Bi-directional grid-connected power converters -
Part 1: General requirements
(IEC 62909-1:2017)
Convertisseurs de puissance connectés aux réseaux Bi-direktionale netzgekoppelte Leistungsumrichter -
bidirectionnels - Partie 1: Exigences générales Teil 1: Allgemeine Anforderungen
(IEC 62909-1:2017) (IEC 62909-1:2017)
This European Standard was approved by CENELEC on 2017-06-23. 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, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62909-1:2018 E
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SIST EN IEC 62909-1:2018
EN IEC 62909-1:2018
European foreword
The text of document 22E/182/FDIS, future edition 1 of IEC 62909-1, prepared by SC 22E "Stabilized
power supplies" of IEC/TC 22 "Power electronic systems and equipment" was submitted to the
IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62909-1:2018.
The following dates are fixed:
(dop) 2018-08-02
• 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) 2021-02-02
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 shall not be held responsible for identifying any or all such patent rights.
Endorsement notice
The text of the International Standard IEC 62909-1:2017 was approved by CENELEC as a European
Standard without any modification.
2
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SIST EN IEC 62909-1:2018
EN IEC 62909-1:2018
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
1
IEC 60038 (mod) 2009 IEC standard voltages EN 60038 2011
IEC 60146-2 1999 Semiconductor converters - EN 60146-2 2000
Part 2: Self-commutated semiconductor
converters including direct d.c. converters
IEC 61000-3-2 2014 Electromagnetic compatibility (EMC) - EN 61000-3-2 2014
Part 3-2: Limits - Limits for harmonic
current emissions (equipment input current
≤ 16 A per phase)
IEC 61000-3-12 2011 Electromagnetic compatibility (EMC) - EN 61000-3-12 2011
Part 3-12: Limits - Limits for harmonic
currents produced by equipment
connected to public low-voltage systems
with input current > 16 A and ≤ 75 A per
phase
IEC 61727 2004 Photovoltaic (PV) systems - Characteristics - -
of the utility interface
IEC 62109-1 2010 Safety of power converters for use in EN 62109-1 2010
photovoltaic power systems -
Part 1: General requirements
IEC 62040-3 2011 Uninterruptible power systems (UPS) - EN 62040-3 2011
Part 3: Method of specifying the
performance and test requirements
IEC 62477-1 2012 Safety requirements for power electronic EN 62477-1 2012
converter systems and equipment -
+A11 2014
Part 1: General
+A1 2016 +A1 2017
1
The title of EN 60038 is "CENELEC standard voltages".
3
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SIST EN IEC 62909-1:2018
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SIST EN IEC 62909-1:2018
IEC 62909-1
®
Edition 1.0 2017-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Bi-directional grid-connected power converters –
Part 1: General requirements
Convertisseurs de puissance connectés aux réseaux bidirectionnels –
Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-4365-7
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 IEC 62909-1:2018
– 2 – IEC 62909-1:2017 © IEC 2017
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 GCPC general specification . 16
4.1 General . 16
4.2 Description of GCPC and its components . 16
4.3 Operating modes . 17
4.4 Interfaces with distributed energy resources . 20
5 Performance requirements. 20
5.1 DC-connection interface . 20
5.1.1 General . 20
5.1.2 Capacitor discharge . 22
5.2 Converter . 22
5.2.1 General . 22
5.2.2 DC/DC converter . 23
5.2.3 Bi-directional inverter . 23
5.3 Grid interface . 23
5.3.1 General . 23
5.3.2 AC output to the grid . 23
5.3.3 Input from the grid – Harmonic currents . 24
5.4 AC output to the load under grid-independent operation . 24
5.4.1 Conditions for the GCPC to supply a load . 24
5.4.2 Characteristics to be declared by the manufacturer . 25
6 Hazard protection requirements . 25
6.1 General . 25
6.2 Fault and abnormal conditions . 25
6.3 Short-circuit and overload protection . 25
6.3.1 General . 25
6.3.2 Specification of input short-circuit withstand strength and output short-
circuit current ability . 25
6.3.3 Short-circuit coordination (backup protection) . 26
6.3.4 Protection by several devices . 26
6.4 Protection against electric shock . 26
6.4.1 General . 26
6.4.2 Decisive voltage class . 26
6.4.3 Provision for basic protection . 26
6.4.4 Provision for fault protection . 27
6.4.5 Enhanced protection . 27
6.4.6 Protective measures . 28
6.4.7 Insulation . 28
6.4.8 Compatibility with residual current-operated protective devices (RCD) . 31
6.5 Protection against electrical energy hazards . 31
6.5.1 Operator access areas. 31
6.5.2 Service access areas . 31
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IEC 62909-1:2017 © IEC 2017 – 3 –
6.6 Protection against fire and thermal hazards . 31
6.6.1 Circuits representing a fire hazard . 31
6.6.2 Components representing a fire hazard . 31
6.6.3 Fire enclosures . 32
6.6.4 Temperature limits . 32
6.6.5 Limited power sources . 32
6.7 Protection against mechanical hazards . 32
6.7.1 General . 32
6.7.2 Liquid cooled GCPC . 32
6.8 Equipment with multiple sources of supply . 33
6.9 Protection against environmental stresses . 33
6.10 Protection against sonic pressure hazards . 33
6.10.1 General . 33
6.10.2 Sonic pressure and sound level . 33
6.11 Wiring and connections . 33
6.11.1 General . 33
6.11.2 Routing . 34
6.11.3 Colour coding . 34
6.11.4 Splices and connections . 34
6.11.5 Accessible connections . 34
6.11.6 Interconnections between parts of the GCPC . 34
6.11.7 Supply connections. 34
6.11.8 Terminals . 34
6.12 Enclosures . 34
6.12.1 General . 34
6.12.2 Handles and manual controls . 34
6.12.3 Cast metal . 34
6.12.4 Sheet metal . 34
6.12.5 Stability test for enclosure . 35
7 Test requirements . 35
7.1 General . 35
7.1.1 Test objectives and classification . 35
7.1.2 Selection of test samples . 35
7.1.3 Sequence of tests . 35
7.1.4 Earthing conditions . 35
7.1.5 General conditions for tests . 35
7.1.6 Compliance . 35
7.1.7 Test overview . 35
7.2 Test specifications . 35
7.2.1 Visual inspections (type test, sample test and routine test) . 35
7.2.2 Mechanical tests . 35
7.2.3 Electrical tests . 36
7.2.4 Abnormal operation and simulated faults tests . 38
7.2.5 Material tests . 40
7.2.6 Environmental tests (type tests) . 40
7.2.7 Hydrostatic pressure test (type test and routine test) . 41
8 Information and marking requirements . 41
8.1 General . 41
8.2 Information for selection . 41
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8.3 Information for installation and commissioning . 41
8.3.1 General . 41
8.3.2 Mechanical considerations . 41
8.3.3 Environment . 41
8.3.4 Handling and mounting . 41
8.3.5 Enclosure temperature. 41
8.3.6 Connections . 41
8.3.7 Protection requirements . 42
8.3.8 Commissioning . 42
8.4 Information for use . 42
8.4.1 General . 42
8.4.2 Adjustment . 43
8.4.3 Labels, signs and signals . 43
8.5 Information for maintenance . 43
8.5.1 General . 43
8.5.2 Capacitor discharge . 43
8.5.3 Auto restart/bypass connection . 43
8.5.4 Other hazards . 43
8.5.5 Equipment with multiple sources of supply . 43
Bibliography . 44
Figure 1 – Example of GCPC structure . 17
Figure 2 – Power flow of mode I . 18
Figure 3 – Power flow of mode II . 19
Figure 4 – Power flow of mode III . 19
Figure 5 – Power flow of mode IV . 20
Figure 6 – Examples of DC-connection interface voltage range . 21
Table 1 – Alphabetical list of terms . 9
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SIST EN IEC 62909-1:2018
IEC 62909-1:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
BI-DIRECTIONAL GRID-CONNECTED POWER CONVERTERS –
Part 1: General requirements
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 62909-1 has been prepared by subcommittee 22E: Stabilized
power supplies, of IEC technical committee 22: Power electronic systems and equipment.
The text of this International Standard is based on the following documents:
FDIS Report on voting
22E/182/FDIS 22E/183/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
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SIST EN IEC 62909-1:2018
– 6 – IEC 62909-1:2017 © IEC 2017
This publication is to be read in conjunction with IEC 62477-1:2012. It follows the structure of
IEC 62477-1:2012 and supplements or modifies its corresponding clauses. Wherever the term
"PECS" appears in the cited clauses, it needs to be replaced by "GCPC".
A list of all parts in the IEC 62909 series, published under the general title Bi-directional grid
connected power converters, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document 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 IEC 62909-1:2018
IEC 62909-1:2017 © IEC 2017 – 7 –
INTRODUCTION
The solution to global warming and fossil fuel depletion requires an expansion of renewable
energy and the spread of distributed energy resources, with the new infrastructure containing
micro-grids and smaller-scale nano-grids. Nano-grid systems are especially suited to
increasing energy-usage efficiency and reducing power consumption of homes by combining
and optimally controlling energy storage with generators.
In order to optimize the power consumption within the nano-grid of a home, it is necessary to
supply the electricity its residents require by combining and optimizing an electricity generator
with rechargeable energy storage. Independent generators and battery storage units are
already on the market; but, for such new systems, development has just started. Although
power generation sources and storage batteries are generally expensive, the tendency of that
is still more remarkable in the early stage in which a market is formed. For stable growth of a
market, extendibility, compatibility, and robustness of such system are especially important. If
a connecting interface is standardized and compatibility is insured, many products can be put
onto the market and their prices can be kept at a proper level. If a new standard is utilized for
product certification, their broad acceptance can be earlier and greater. From the above
viewpoint, it is necessary to promptly advance standardization of bi-directional grid-connected
power converter (GCPC) which combined the source of power generation and the storage
battery. This part of IEC 62909 provides common general requirements independent of
special characteristics of individual applications.
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SIST EN IEC 62909-1:2018
– 8 – IEC 62909-1:2017 © IEC 2017
BI-DIRECTIONAL GRID-CONNECTED POWER CONVERTERS –
Part 1: General requirements
1 Scope
This part of IEC 62909 specifies general aspects of bi-directional grid-connected power
converters (GCPC), consisting of a grid-side inverter with two or more types of DC-port
interfaces on the application side with system voltages not exceeding 1 000 V AC or
1 500 V DC. In special cases, a GCPC will have only one DC-port interface, which is
connected to a bidirectional energy-storage device. This document includes terminology,
specifications, performance, safety, system architecture, and test-case definitions. The
"system architecture" defines interaction between the inverter and converters. Requirements
which are common, general, and independent of special characteristics of individual
generators and bi-directional storages are de
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Dvosmerni omrežni elektroenergetski pretvorniki - 1. del: Splošne zahteve (IEC 62909-1:2017)Bi-direktionale netzgekoppelte Leistungsumrichter - Teil 1: Allgemeine Anforderungen (IEC 62909-1:2017)Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1: Exigences générales (IEC 62909-1:2017)Bi-directional grid connected power converters - Part 1: General requirements (IEC 62909-1:2017)29.200QDSDMDQMHRectifiers. Convertors. Stabilized power supplyICS:Ta slovenski standard je istoveten z:EN IEC 62909-1:2018SIST EN 62909-1:2018en01-oktober-2018SIST EN 62909-1:2018SLOVENSKI
STANDARD
SIST EN 62909-1:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN IEC 62909-1
February 2018 ICS 29.200
English Version
Bi-directional grid-connected power converters -
Part 1: General requirements (IEC 62909-1:2017)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 1: Exigences générales (IEC 62909-1:2017)
Bi-direktionale netzgekoppelte Leistungsumrichter -
Teil 1: Allgemeine Anforderungen (IEC 62909-1:2017) This European Standard was approved by CENELEC on 2017-06-23. 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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung CEN-CENELEC Management Centre: Rue de la Science 23,
B-1040 Brussels © 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 62909-1:2018 E SIST EN 62909-1:2018
EN IEC 62909-1:2018 2 European foreword The text of document 22E/182/FDIS, future edition 1 of IEC 62909-1, prepared by SC 22E "Stabilized power supplies" of IEC/TC 22 "Power electronic systems and equipment" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62909-1:2018.
The following dates are fixed: • latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-08-02 • latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2021-02-02
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Endorsement notice The text of the International Standard IEC 62909-1:2017 was approved by CENELEC as a European Standard without any modification. SIST EN 62909-1:2018
EN IEC 62909-1:2018 3 Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
NOTE 1
Where an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies.
NOTE 2
Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60038 (mod) 2009
IEC standard voltages EN 60038 1 2011 IEC 60146-2 1999
Semiconductor converters -
Part 2: Self-commutated semiconductor converters including direct d.c. converters EN 60146-2 2000
IEC 61000-3-2 2014
Electromagnetic compatibility (EMC) -
Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase) EN 61000-3-2 2014
IEC 61000-3-12 2011
Electromagnetic compatibility (EMC) -
Part 3-12: Limits - Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current > 16 A and ≤ 75 A per phase EN 61000-3-12 2011
IEC 61727 2004
Photovoltaic (PV) systems - Characteristics of the utility interface - -
IEC 62109-1 2010
Safety of power converters for use in photovoltaic power systems -
Part 1: General requirements EN 62109-1 2010
IEC 62040-3 2011
Uninterruptible power systems (UPS) -
Part 3: Method of specifying the performance and test requirements EN 62040-3 2011
IEC 62477-1 2012
Safety requirements for power electronic converter systems and equipment -
Part 1: General EN 62477-1 +A11 2012
2014 +A1 2016
+A1 2017
1 The title of EN 60038 is "CENELEC standard voltages". SIST EN 62909-1:2018
SIST EN 62909-1:2018
IEC 62909-1 Edition 1.0 2017-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Bi-directional grid-connected power converters –
Part 1: General requirements
Convertisseurs de puissance connectés aux réseaux bidirectionnels –
Partie 1: Exigences générales
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 29.200
ISBN 978-2-8322-4365-7
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale ®
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. SIST EN 62909-1:2018 colourinside
– 2 – IEC 62909-1:2017 © IEC 2017 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope . 8 2 Normative references . 8 3 Terms and definitions . 9 4 GCPC general specification . 16 4.1 General . 16 4.2 Description of GCPC and its components . 16 4.3 Operating modes . 17 4.4 Interfaces with distributed energy resources . 20 5 Performance requirements. 20 5.1 DC-connection interface . 20 5.1.1 General . 20 5.1.2 Capacitor discharge . 22 5.2 Converter . 22 5.2.1 General . 22 5.2.2 DC/DC converter . 23 5.2.3 Bi-directional inverter . 23 5.3 Grid interface . 23 5.3.1 General . 23 5.3.2 AC output to the grid . 23 5.3.3 Input from the grid – Harmonic currents . 24 5.4 AC output to the load under grid-independent operation . 24 5.4.1 Conditions for the GCPC to supply a load . 24 5.4.2 Characteristics to be declared by the manufacturer . 25 6 Hazard protection requirements . 25 6.1 General . 25 6.2 Fault and abnormal conditions . 25 6.3 Short-circuit and overload protection . 25 6.3.1 General . 25 6.3.2 Specification of input short-circuit withstand strength and output short-circuit current ability . 25 6.3.3 Short-circuit coordination (backup protection) . 26 6.3.4 Protection by several devices . 26 6.4 Protection against electric shock . 26 6.4.1 General . 26 6.4.2 Decisive voltage class . 26 6.4.3 Provision for basic protection . 26 6.4.4 Provision for fault protection . 27 6.4.5 Enhanced protection . 27 6.4.6 Protective measures . 28 6.4.7 Insulation . 28 6.4.8 Compatibility with residual current-operated protective devices (RCD) . 31 6.5 Protection against electrical energy hazards . 31 6.5.1 Operator access areas. 31 6.5.2 Service access areas . 31 SIST EN 62909-1:2018
IEC 62909-1:2017 © IEC 2017 – 3 –
6.6 Protection against fire and thermal hazards . 31 6.6.1 Circuits representing a fire hazard . 31 6.6.2 Components representing a fire hazard . 31 6.6.3 Fire enclosures . 32 6.6.4 Temperature limits . 32 6.6.5 Limited power sources . 32 6.7 Protection against mechanical hazards . 32 6.7.1 General . 32 6.7.2 Liquid cooled GCPC . 32 6.8 Equipment with multiple sources of supply . 33 6.9 Protection against environmental stresses . 33 6.10 Protection against sonic pressure hazards . 33 6.10.1 General . 33 6.10.2 Sonic pressure and sound level . 33 6.11 Wiring and connections . 33 6.11.1 General . 33 6.11.2 Routing . 34 6.11.3 Colour coding . 34 6.11.4 Splices and connections . 34 6.11.5 Accessible connections . 34 6.11.6 Interconnections between parts of the GCPC . 34 6.11.7 Supply connections. 34 6.11.8 Terminals . 34 6.12 Enclosures . 34 6.12.1 General . 34 6.12.2 Handles and manual controls . 34 6.12.3 Cast metal . 34 6.12.4 Sheet metal . 34 6.12.5 Stability test for enclosure . 35 7 Test requirements . 35 7.1 General . 35 7.1.1 Test objectives and classification . 35 7.1.2 Selection of test samples . 35 7.1.3 Sequence of tests . 35 7.1.4 Earthing conditions . 35 7.1.5 General conditions for tests . 35 7.1.6 Compliance . 35 7.1.7 Test overview . 35 7.2 Test specifications . 35 7.2.1 Visual inspections (type test, sample test and routine test) . 35 7.2.2 Mechanical tests . 35 7.2.3 Electrical tests . 36 7.2.4 Abnormal operation and simulated faults tests . 38 7.2.5 Material tests . 40 7.2.6 Environmental tests (type tests) . 40 7.2.7 Hydrostatic pressure test (type test and routine test) . 41 8 Information and marking requirements . 41 8.1 General . 41 8.2 Information for selection . 41 SIST EN 62909-1:2018
– 4 – IEC 62909-1:2017 © IEC 2017 8.3 Information for installation and commissioning . 41 8.3.1 General . 41 8.3.2 Mechanical considerations . 41 8.3.3 Environment . 41 8.3.4 Handling and mounting . 41 8.3.5 Enclosure temperature. 41 8.3.6 Connections . 41 8.3.7 Protection requirements . 42 8.3.8 Commissioning . 42 8.4 Information for use . 42 8.4.1 General . 42 8.4.2 Adjustment . 43 8.4.3 Labels, signs and signals . 43 8.5 Information for maintenance . 43 8.5.1 General . 43 8.5.2 Capacitor discharge . 43 8.5.3 Auto restart/bypass connection . 43 8.5.4 Other hazards . 43 8.5.5 Equipment with multiple sources of supply . 43 Bibliography . 44
Figure 1 – Example of GCPC structure . 17 Figure 2 – Power flow of mode I . 18 Figure 3 – Power flow of mode II . 19 Figure 4 – Power flow of mode III . 19 Figure 5 – Power flow of mode IV . 20 Figure 6 – Examples of DC-connection interface voltage range . 21
Table 1 – Alphabetical list of terms . 9
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IEC 62909-1:2017 © IEC 2017 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
BI-DIRECTIONAL GRID-CONNECTED POWER CONVERTERS –
Part 1: General requirements
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 62909-1 has been prepared by subcommittee 22E: Stabilized power supplies, of IEC technical committee 22: Power electronic systems and equipment. The text of this International Standard is based on the following documents: FDIS Report on voting 22E/182/FDIS 22E/183/RVD
Full information on the voting for the approval of this International Standard can be found in the report on voting indicated in the above table. This document has been drafted in accordance with the ISO/IEC Directives, Part 2. SIST EN 62909-1:2018
– 6 – IEC 62909-1:2017 © IEC 2017 This publication is to be read in conjunction with IEC 62477-1:2012. It follows the structure of IEC 62477-1:2012 and supplements or modifies its corresponding clauses. Wherever the term "PECS" appears in the cited clauses, it needs to be replaced by "GCPC". A list of all parts in the IEC 62909 series, published under the general title Bi-directional grid connected power converters, can be found on the IEC website. The committee has decided that the contents of this document will remain unchanged until the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to the specific document. At this date, the document 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.
SIST EN 62909-1:2018
IEC 62909-1:2017 © IEC 2017 – 7 –
INTRODUCTION The solution to global warming and fossil fuel depletion requires an expansion of renewable energy and the spread of distributed energy resources, with the new infrastructure containing micro-grids and smaller-scale nano-grids. Nano-grid systems are especially suited to increasing energy-usage efficiency and reducing power consumption of homes by combining and optimally controlling energy storage with generators. In order to optimize the power consumption within the nano-grid of a home, it is necessary to supply the electricity its residents require by combining and optimizing an electricity generator with rechargeable energy storage. Independent generators and battery storage units are already on the market; but, for such new systems, development has just started. Although power generation sources and storage batteries are generally expensive, the tendency of that is still more remarkable in the early stage in which a market is formed. For stable growth of a market, extendibility, compatibility, and robustness of such system are especially important. If a connecting interface is standardized and compatibility is insured, many products can be put onto the market and their prices can be kept at a proper level. If a new standard is utilized for product certification, their broad acceptance can be earlier and greater. From the above viewpoint, it is necessary to promptly advance standardization of bi-directional grid-connected power converter (GCPC) which combined the source of power generation and the storage battery. This part of IEC 62909 provides common general requirements independent of special characteristics of individual applications.
SIST EN 62909-1:2018
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Part 1: General requirements
1 Scope This part of IEC 62909 specifies general aspects of bi-directional grid-connected power converters (GCPC), consisting of a grid-side inverter with two or more types of DC-port interfaces on the application side with system voltages not exceeding 1 000 V AC or 1 500 V DC. In special cases, a GCPC will have only one DC-port interface, which is connected to a bidirectional energy-storage device. This document includes terminology, specifications, performance, safety, system architecture, and test-case definitions. The "system architecture" defines interaction between the inverter and converters. Requirements which are common, general, and independent of special characteristics of individual generators and bi-directional storages are defined. This document does not cover uninterruptible power supply (UPS) systems, which fall under the scope of IEC 62040 (all parts). Requirements for internal and external digital communication might be necessary; the interface requirements including communication with distributed energy resources are provided in a future part of IEC 62909. All EMC requirements are defined by reference to existing IEC standards. External communication requirements are out of scope of this document. NOTE The control signal from the grid is not defined in this document. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60038:2009, IEC standard voltages IEC 60146-2:1999, Semiconductor converters – Part 2: Self-commutated semiconductor converters including direct d.c converters IEC 61000-3-2:2014, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic current emissions (equipment input current ≤ 16 A per phase) IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current >16 A and ≤ 75 A per phase IEC 61727:2004, Photovoltaic (PV) systems – Characteristics of the utility in
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