IEC 62909-2:2019

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

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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

– 2 – IEC 62909-2:2019  IEC 2019
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

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

– 4 – IEC 62909-2:2019  IEC 2019
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.
...