SIST EN IEC 62909-2:2019

SLOVENSKI STANDARD
SIST EN IEC 62909-2:2019
01-november-2019
Dvosmerni omrežni elektroenergetski pretvorniki - 2. del: Vmesnik za GCPC in
porazdeljene energijske vire (IEC 62909-2:2019)
Bi-directional grid-connected power converters - Part 2: Interface of GCPC and
distributed energy resources (IEC 62909-2:2019)
Bidirektionale netzgekoppelte Leistungsumrichter - Teil 2: Schnittstelle des GCPC und
erneuerbaren Energiequellen (IEC 62909-2:2019)
Convertisseurs de puissance connectés aux réseaux bidirectionnels - Partie 2: Interface
du GCPC avec les ressources énergétiques réparties (IEC 62909-2:2019)
Ta slovenski standard je istoveten z: EN IEC 62909-2:2019
ICS:
29.200 Usmerniki. Pretvorniki. Rectifiers. Convertors.
Stabilizirano električno Stabilized power supply
napajanje
SIST EN IEC 62909-2:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62909-2:2019

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SIST EN IEC 62909-2:2019


EUROPEAN STANDARD EN IEC 62909-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2019
ICS 29.200

English Version
Bi-directional grid-connected power converters - Part 2: Interface
of GCPC and distributed energy resources
(IEC 62909-2:2019)
Convertisseurs de puissance connectés aux réseaux Bidirektionale netzgekoppelte Leistungsumrichter - Teil 2:
bidirectionnels - Partie 2: Interface du GCPC avec les Schnittstelle des GCPC und erneuerbaren Energiequellen
ressources énergétiques réparties (IEC 62909-2:2019)
(IEC 62909-2:2019)
This European Standard was approved by CENELEC on 2019-04-12. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62909-2:2019 E

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SIST EN IEC 62909-2:2019
EN IEC 62909-2:2019 (E)
European foreword
The text of document 22E/196/FDIS, future edition 1 of IEC 62909-2, 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 62909-2:2019.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-01-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-04-12
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 62909-2:2019 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60364-7-722:2018 NOTE Harmonized as HD 60364-7-722:2018
1
IEC 61851-1:2017 NOTE Harmonized as EN IEC 61851-1:— (not modified)
IEC 61982:2012 NOTE Harmonized as EN 61982:2012 (not modified)
IEC 62109-1:2010 NOTE Harmonized as EN 62109-1:2010 (not modified)
IEC 62619:2017 NOTE Harmonized as EN 62619:2017 (not modified)
2 3
IEC 63027:— NOTE Harmonized as EN IEC 63027:—



1
Under preparation. Stage at the time of publication: FprEN 61851-1:2016.
2
Under preparation. Stage at the time of publication: IEC/PCC 63027:2018.
3
Under preparation. Stage at the time of publication: prEN 63027:2017.
2

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SIST EN IEC 62909-2:2019
EN IEC 62909-2:2019 (E)
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 60730-1 (mod) 2013 Automatic electrical controls - Part 1: EN 60730-1 2016
General requirements
+ A1 2015  + A1 2019
IEC 61508 series Functional safety of EN 61508 series
electrical/electronic/programmable
electronic safety-related systems
IEC 61851-23 2014 Electric vehicle conductive charging EN 61851-23 2014
system - Part 23: DC electric vehicle
charging station
IEC 62909-1 2017 Bi-directional grid connected power EN IEC 62909-1 2018
converters - Part 1: General requirements


3

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IEC 62909-2

®


Edition 1.0 2019-03




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Bi-directional grid-connected power converters –

Part 2: Interface of GCPC and distributed energy resources




Convertisseurs de puissance connectés aux réseaux bidirectionnels –

Partie 2: Interface du GCPC avec les ressources énergétiques réparties
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.200 ISBN 978-2-8322-6613-7




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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CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 GCPC general specifications . 11
4.1 General . 11
4.2 Description of GCPC and its components . 11
4.3 Operating modes . 11
4.4 Interfaces with distributed energy resources . 11
4.101 Specific requirements for earth fault detection on DC-port interfaces . 12
5 Performance requirements. 12
6 Hazard protection requirements . 12
7 Test requirements . 12
8 Information and marking requirements . 12
101 Interface requirements for EV section . 13
101.1 General system requirement and interface . 13
101.2 Protection against electric shock . 13
101.3 Connection between the power supply and the EV . 13
101.4 EV coupler requirements . 13
101.5 Charging cable assembly requirements . 13
101.6 Specific requirements for GCPC including EV section . 13
101.7 Communication . 13
101.8 Isolation . 14
101.8.1 General . 14
101.8.2 GCPC of system A . 14
101.8.3 GCPC of system B . 14
101.8.4 GCPC of system C. 14
101.9 Connection/disconnection . 15
101.10 Self-start up . 16
101.10.1 General . 16
101.10.2 EV section of system A . 16
101.11 Test requirements and procedures for connection . 19
101.12 EV section requirements . 19
102 Interface requirements for BS section . 19
102.1 General . 19
102.2 System configuration . 19
102.3 Voltage and current requirements . 20
102.3.1 General . 20
102.3.2 Location for the information for selection . 20
102.3.3 Voltage and current ranges . 20
102.4 Requirements of the control port . 21
102.5 Functional safety requirements of the control port . 21
102.6 Installation . 21
103 Interface requirements for PV section . 21
103.1 Protection against arc fault . 21

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Bibliography . 23

Figure 101 – GCPC with multiple earth fault detection circuits . 12
Figure 102 – GCPC with EV section . 13
Figure 103 – GCPC with an isolated DC/DC converter in its EV section . 14
Figure 104 – GCPC with a non-isolated DC/DC converter in its EV section . 15
Figure 105 – Active EV section of GCPC with a switch at DC-connection interface side . 15
Figure 106 – Inactive EV section . 16
Figure 107 – Interface circuit for charging/discharging control of system A station . 18
Figure 108 – An example of GCPC containing a battery system with discrete DC/DC
converter . 19
Figure 109 – An example of GCPC containing a battery system with an integrated
dc/dc converter . 20
Figure 110 – External AFD . 22
Figure 111 – Integrated AFD . 22

Table 101 – Alphabetical list of terms . 8
Table 102 – Parameters and values for interface circuit in Figure 107. 17

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

BI-DIRECTIONAL GRID-CONNECTED POWER CONVERTERS –

Part 2: Interface of GCPC and distributed energy resources

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 62909-2 has been prepared by subcommittee 22E: Stabilized
power supplies, of IEC technical committee 22: Power electronic systems and equipment.
This International Standard is to be used in conjunction with IEC 62909-1:2017.
The clauses of particular requirements in this document supplement or modify the
corresponding clauses in IEC 62909-1:2017. Where the text of subsequent clauses indicates
an "addition" to or a "replacement" of the relevant requirement, test specification or
explanation of IEC 62909-1:2017, these changes are made to the relevant text of
IEC 62909-1:2017. Where no change is necessary and the clause is applicable, the words
"The provisions of IEC 62909-1:2017, Clause XX shall apply" are used. Additional clauses,
tables, figures and notes which are not included in IEC 62909-1:2017, are numbered starting
from 101.

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IEC 62909-2:2019  IEC 2019 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
22E/196/FDIS 22E/198/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.
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.

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INTRODUCTION
In order to optimize power consumption, for example, within the nanogrid of a home,
electricity generation should be optimally combined with rechargeable energy storage. This
optimization is accomplished, in part, by providing an efficient transfer between DC and AC
electricity to accommodate storage batteries. The IEC 62909 series describes a bi-directional
grid-connected power converter (GCPC) which efficiently integrates sources of power
generation with energy storage.
IEC 62909-1 defines common general requirements, independent from the special
characteristics of individual applications. This document defines the additional requirements
necessary for interfacing particular types of distributed energy resources to a GCPC.

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BI-DIRECTIONAL GRID-CONNECTED POWER CONVERTERS –

Part 2: Interface of GCPC and distributed energy resources



1 Scope
This part of IEC 62909 specifies GCPC interface requirements for particular distributed
energy resources, namely electric vehicle (EV), battery, and photovoltaic (PV) systems. These
requirements are in addition to the general requirements given in IEC 62909-1.
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 60730-1:2013, Automatic electrical controls – Part 1: General requirements
IEC 60730-1:2013/AMD1:2015
IEC 61508 (all parts), Functional safety of electrical/electronic/programmable electronic
safety-related systems
IEC 61851-23:2014, Electric vehicle conductive charging system – Part 23: DC electric
vehicle charging station
IEC 62909-1:2017, Bi-directional grid-connected power converters – Part 1: General
requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 62909-1 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
Table 101 provides an alphabetical cross-reference listing of terms.

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Table 101 – Alphabetical list of terms
Term Term Term
Term Term Term
number number number
arc fault detector 3.101 distributed energy 3.113 photovoltaic 3.124
resources
AFD PV
arc fault interrupter 3.102 earth fault 3.114 PV DC-port interface 3.125
AFI
battery management 3.103 electric vehicle 3.115 PV section 3.126
system
EV
BMS
battery system 3.104 EV DC/DC converter 3.116 shutdown sequence 3.127
BS
BS section 3.105 EV DC-port interface  3.117
BS DC-port interface 3.106 EV section 3.118
charge/discharge 3.107 fault status signal 3.119
switch
charging connector 3.108 GCPC 3.120
DC-connection 3.109 GCPC fault detection 3.121
interface circuit
DC/DC converter 3.110 grid-independent 3.122
operation
DC-port interface 3.111 isolated DC/DC 3.123
converter
dedicated auxiliary
3.112
power port

Add the following terms and definitions:
3.101
arc fault detector
AFD
device or group of devices to detect arcs
Note 1 to entry: This note applies to the French language only.
3.102
arc fault interrupter
AFI
device able to interrupt arc faults triggered by an arc fault detector
Note 1 to entry: This note applies to the French language only.
3.103
battery management system
BMS
electronic system associated with a battery which has functions to cut off or disconnect it in
case of overcharge, overcurrent, overdischarge, and overheating
Note 1 to entry The BMS monitors and/or manages the battery’s state, calculates secondary data, reports that
data and/or controls the battery’s environment to influence its safety, performance and/or service life.
Note 2 to entry Cut-off or disconnection due to overdischarge is not mandatory if there is an agreement between
the cell manufacturer and the GCPC manufacturer.
Note 3 to entry The function of the BMS can be assigned to the battery pack or to equipment that uses the battery.

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Note 4 to entry The BMS can be divided and it can be found partially in the battery pack and partially on the
equipment that uses the battery.
Note 5 to entry The BMS is sometimes also referred to as a BMU (battery management unit).
Note 6 to entry: This note applies to the French language only.
[SOURCE: IEC 62619:2017, 3.12, modified – The definition, Note 1 and Note 2 have been
rephrased.]
3.104
battery system
BS
system which comprises one or more cells, modules or battery packs
Note 1 to entry It has a battery management system to cut off or disconnect it in case of overcharge, overcurrent,
overdischarge, and overheating. Where cells, modules and battery packs employ an acid electrolyte, the BMS may
be absent from the battery system provided that the BMS functions are integral to the BS section
Note 2 to entry Cut-off or disconnection due to overdischarge is not mandatory if there is an agreement between
the cell manufacturer and the GCPC manufacturer
Note 3 to entry The battery system may have cooling or heating units.
[SOURCE: IEC 62619:2017, 3.11, modified – Note 1 and Note 2 have been rephrased.]
3.105
BS section
part of a GCPC between the DC-connection interface and a BS DC-port interface
3.106
BS DC-port interface
DC-port interface connected to a battery system
3.107
charge/discharge switch
switch for preventing unintentional power flow which is located between the DC-connection
interface and a DC/DC converter, or between a DC/DC converter and an EV DC-port interface
3.108
charging connector
means of enabling the manual connection of a flexible cable to an EV for the purpose of
charging the traction batteries
3.109
DC-connection interface
internal system DC bus between the DC/DC converters and the bi-directional inverter
[SOURCE: IEC 62909-1:2017, 3.4, modified – "power electronic" has been replaced with
"DC/DC".]
3.110
DC/DC converter
equipment that converts one DC voltage to another DC voltage
[SOURCE: IEC 62909-1:2017, 3.6]
3.111
DC-port interface
interface between the DC/DC converter and distributed energy resources or, in the case
where the DC-connection interface is directly connected to distributed energy resources

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without the DC/DC converter, between the DC-connection interface and the distributed energy
resources
[SOURCE: IEC 62909-1:2017, 3.5]
3.112
dedicated auxiliary power port
special port to supply auxiliary power from the EV to the GCPC to wake up the GCPC from
operating in an idle state
3.113
distributed energy resources
DC power sources generating and/or storing electricity near the consuming area
[SOURCE: IEC 62909-1:2017, 3.9, modified – The note has been deleted.]
3.114
earth fault
occurrence of an accidental conductive path between a live conductor and the Earth
[SOURCE: IEC 60050-826:2004, 826-14-13, modified – The notes have been deleted.]
3.115
electric vehicle
electric road vehicle
EV
any vehicle propelled by an electric motor drawing current from a rechargeable energy
storage system (RESS), intended primarily for use on public roads
[SOURCE: IEC 60364-7-722:2018, 722.3.1]
3.116
EV DC/DC converter
component of the EV section that converts one DC voltage to another DC voltage
3.117
EV DC-port interface
DC-port interface connected to an EV
3.118
EV section
part of a GCPC between the DC-connection interface and an EV DC-port interface
3.119
fault status signal
signal indicating that faults are present which could cause a hazard according to IEC 62909-2
3.120
bi-directional grid-connected power converter
grid-connected power converter
GCPC
power converter connected to the grid by the bi-directional inverter with multiple DC-port
interfaces
Note 1 to entry: This note applies to the French language only.
[SOURCE: IEC 62909-1:2017, 3.19]

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3.121
GCPC fault detection circuit
circuit that detects functional faults in a GCPC
3.122
grid-independent operation
electricity supply through GCPC to an AC load during grid isolation
[SOURCE: IEC 62909-1:2017, 3.20]
3.123
isolated DC/DC converter
DC/DC converter with DC circuit on output side which is electrically separated by at least
basic insulation from input side
3.124
photovoltaic
PV
relating to the conversion of light directly into electrical energy
[SOURCE: IEC 62109-1:2010, 3.55]
3.125
PV DC-port interface
DC-port interface connected to a PV system
3.126
PV sect
...