Smart cities - City service continuity against disasters - The role of the electrical supply

IEC 63152:2020 establishes concepts and gives guidelines to help sustain a variety of city services on the occasion of a disaster from the perspective of providing electricity. It outlines the basic concepts on how multiple city services can cooperate and continue by electricity continuity plan(s) and electricity continuity system(s). It also specifies methods and means to establish these.
The users of this document are assumed to be city developers, city operators, equipment manufacturers, essential service providers and disaster management personnel.
Cities are facing many kinds of potential threats which affect the continuity of city services. There exists, therefore, a great need to establish safe and secure societies in which negative impacts on city services to the citizens are minimized and city services are continuously available to them during a period of emergency. There is no doubt that, in modern cities, electricity plays a critical role in maintaining city services.

Villes intelligentes - Continuité des services urbains en cas de catastrophes - Rôle de l'alimentation électrique

L'IEC 63152:2020 établit des concepts et spécifie des lignes directrices visant à faciliter le maintien de nombreux services urbains différents en cas de catastrophe, avec pour objectif la fourniture d’électricité. Il présente les concepts de base portant sur le mode de coopération et de pérennité de services urbains multiples par la mise en place d’un ou de plusieurs plans et d’un ou de plusieurs systèmes de continuité de la fourniture d’électricité. Le présent document spécifie également des méthodes et les moyens permettant leur mise en place.
Par hypothèse, les utilisateurs du présent document sont des promoteurs, des exploitants de réseaux urbains, des équipementiers, des fournisseurs de services essentiels et le personnel de gestion des catastrophes.
Les villes sont confrontées à de nombreux types de menaces potentielles affectant la continuité des services urbains. Il est par conséquent particulièrement nécessaire de mettre en place des sociétés sûres et protégées, dans lesquelles les effets négatifs sur les services urbains proposés aux citoyens sont réduits le plus possible, et dans lesquelles la pérennité de ces services est assurée au cours de toute situation d’urgence. Dans les villes modernes, l’électricité constitue un facteur essentiel évident de la continuité des services urbains.

General Information

Status
Published
Publication Date
12-Jul-2020
Current Stage
PPUB - Publication issued
Completion Date
13-Jul-2020
Ref Project

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IEC 63152
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
colour
inside
Smart cities – City service continuity against disasters – The role of the
electrical supply
IEC 63152:2020-07(en)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2020 IEC, Geneva, Switzerland

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

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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.
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3, rue de Varembé info@iec.ch
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About the IEC

The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes

International Standards for all electrical, electronic and related technologies.
About IEC publications

The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the

latest edition, a corrigendum or an amendment might have been published.

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If you wish to give us your feedback on this publication or CISPR.
need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
---------------------- Page: 2 ----------------------
IEC 63152
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
colour
inside
Smart cities – City service continuity against disasters – The role of the
electrical supply
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 03.100.70; 29.240.01 ISBN 978-2-8322-8552-7

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 63152:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Concept of city service continuity (CSC) against disasters ............................................... 7

5 Requirements and guideline for electricity continuity plan (ECP) ...................................... 9

5.1 General ................................................................................................................... 9

5.2 Planning ................................................................................................................. 9

5.2.1 General ........................................................................................................... 9

5.2.2 Specific items to be considered ..................................................................... 10

6 Requirements for electricity continuity system (ECS) ..................................................... 10

6.1 General ................................................................................................................. 10

6.2 Requirements for basic function ............................................................................ 11

Annex A (informative) Consideration for ECP/ECS ............................................................... 12

A.1 Evaluation of necessary electricity capacity .......................................................... 12

A.2 Basic model of ECP/ECS ...................................................................................... 12

Annex B (informative) CSC type........................................................................................... 14

B.1 CSC type1: Self-backup ........................................................................................ 14

B.2 CSC type2: Information cooperation ...................................................................... 14

B.3 CSC type3: Power cooperation ............................................................................. 15

Annex C (informative) CSC planning .................................................................................... 16

C.1 Setting the level of services to be sustained for each area .................................... 16

C.2 How to improve cooperation .................................................................................. 17

Annex D (informative) ECP/ECS planning using management timetable .............................. 18

Annex E (informative) Disaster related information .............................................................. 20

Annex F (informative) ECS status information ...................................................................... 21

Bibliography .......................................................................................................................... 22

Figure 1 – Necessity of electricity continuity for CSC .............................................................. 8

Figure 2 – CSC concept image building up system of ECSs .................................................... 9

Figure A.1 – Calculating total electricity to be needed ........................................................... 12

Figure A.2 – Basic model of ECP/ECS .................................................................................. 13

Figure B.1 – Image of self-backup......................................................................................... 14

Figure B.2 – Image of information cooperation ...................................................................... 15

Figure B.3 – Image of power cooperation .............................................................................. 15

Figure C.1 – Setting CSC type for each area in a city ........................................................... 16

Figure C.2 – Image of improving cooperation ........................................................................ 17

Figure D.1 – Management timetable of layer-structured ECP/ECS ........................................ 19

Table E.1 – Examples of alert information ............................................................................. 20

---------------------- Page: 4 ----------------------
IEC 63152:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SMART CITIES –
CITY SERVICE CONTINUITY AGAINST DISASTERS –
THE ROLE OF THE ELECTRICAL SUPPLY
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 63152 has been prepared by IEC systems committee Smart Cities.

The text of this International Standard is based on the following documents:
FDIS Report on voting
SyCSmartCities/139/FDIS SyCSmartCities/144/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.

---------------------- Page: 5 ----------------------
– 4 – IEC 63152:2020 © IEC 2020

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.
---------------------- Page: 6 ----------------------
IEC 63152:2020 © IEC 2020 – 5 –
INTRODUCTION

Cities are facing many kinds of potential threats which affect the continuity of city services.

There exists, therefore, a great need to establish safe and secure societies in which negative

impacts on city services to the citizens are minimized and city services are continuously

available to them during a period of emergency. There is no doubt that, in modern cities,

electricity plays a critical role in maintaining city services.

This document provides requirements and guidelines to ensure that city services can be

sustained when the power supply from the grids is discontinued because of disasters.

The users of this document are assumed to be city developers, city operators, equipment

manufacturers, essential service providers and disaster management personnel.
---------------------- Page: 7 ----------------------
– 6 – IEC 63152:2020 © IEC 2020
SMART CITIES –
CITY SERVICE CONTINUITY AGAINST DISASTERS –
THE ROLE OF THE ELECTRICAL SUPPLY
1 Scope

This document establishes concepts and gives guidelines to help sustain a variety of city

services on the occasion of a disaster from the perspective of providing electricity. It outlines

the basic concepts on how multiple city services can cooperate and continue by electricity

continuity plan(s) and electricity continuity system(s). It also specifies methods and means to

establish these.
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.

ISO 22301, Societal security – Business continuity management systems – Requirements

3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
3.1
business continuity plan
BCP

documented procedures that guide organizations to respond, recover, resume, and restore to

a pre-defined level of operation following disruption
[SOURCE: ISO 22301:2012, 3.6]
3.2
electricity continuity plan
ECP

documented procedures that guide organizations to ensure continuity of electricity supply to

maintain city services in a business continuity plan that addresses disruption caused by a

critical event
3.3
electricity continuity system
ECS

system required to ensure reliable and effective implementation of functions which are

necessary for ECP
---------------------- Page: 8 ----------------------
IEC 63152:2020 © IEC 2020 – 7 –
3.4
city service
service that is performed for the benefit of the public

Note 1 to entry: In this document, services depend on provision of electricity supply.

3.5
city service continuity
CSC

status in which, and capability with which, city services (i.e. public, medical, transportation

communication services) that are provided to users in normal times, continue to be fully or

partly provided, even in a state of emergency in which the normal functions of city

infrastructures are interrupted
3.6
disaster

rapid or slow onset event that causes significant disruption to one or more city services for an

extended period of time

Note 1 to entry: This can include natural disasters, failures of key components or systems whether in hardware or

software, physical damage to systems, and cyber attacks.
3.7
organization

person or group of people that has its own functions with responsibilities, authorities and

relationships to achieve its objectives

Note 1 to entry: The concept of organization includes, but is not limited to, sole-trader, company, corporation, firm,

enterprise, authority, partnership, charity or institution, or part or combination thereof, whether incorporated or not,

public or private.

Note 2 to entry: For organizations with more than one operating unit, a single operating unit can be defined as an

organization.
[SOURCE: ISO 22301:2012, 3.33]
4 Concept of city service continuity (CSC) against disasters

Organizations that receive grid electricity supply need to secure back-up power sources in

order to be able to continue providing their services when the grid electricity supply is

discontinued due to disasters, up until the time when the electricity supply is back to normal.

Activities in a city are supported by the continuous supply of various services (water and

sewage, gas, transport, hospitals, communications, logistics, etc.), and such services are

supplied through facilities and devices, most of which, in general, need electricity from the

grid to operate. Therefore, the loss of the grid electricity supply due to disasters results in the

potential impact of a massive loss of s
...

IEC 63152
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Smart cities – City service continuity against disasters – The role of the
electrical supply
Villes intelligentes – Continuité des services urbains en cas de catastrophes –
Rôle de l’alimentation électrique
IEC 63152:2020-07(en-fr)
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2020 IEC, Geneva, Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form

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International Standards for all electrical, electronic and related technologies.
About IEC publications

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---------------------- Page: 2 ----------------------
IEC 63152
Edition 1.0 2020-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Smart cities – City service continuity against disasters – The role of the
electrical supply
Villes intelligentes – Continuité des services urbains en cas de catastrophes –
Rôle de l’alimentation électrique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 03.100.70; 29.240.01 ISBN 978-2-8322-9994-4

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
---------------------- Page: 3 ----------------------
– 2 – IEC 63152:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Concept of city service continuity (CSC) against disasters ............................................... 7

5 Requirements and guideline for electricity continuity plan (ECP) ...................................... 9

5.1 General ................................................................................................................... 9

5.2 Planning ................................................................................................................. 9

5.2.1 General ........................................................................................................... 9

5.2.2 Specific items to be considered ..................................................................... 10

6 Requirements for electricity continuity system (ECS) ..................................................... 10

6.1 General ................................................................................................................. 10

6.2 Requirements for basic function ............................................................................ 11

Annex A (informative) Consideration for ECP/ECS ............................................................... 12

A.1 Evaluation of necessary electricity capacity .......................................................... 12

A.2 Basic model of ECP/ECS ...................................................................................... 12

Annex B (informative) CSC type........................................................................................... 14

B.1 CSC type1: Self-backup ........................................................................................ 14

B.2 CSC type2: Information cooperation ...................................................................... 14

B.3 CSC type3: Power cooperation ............................................................................. 15

Annex C (informative) CSC planning .................................................................................... 16

C.1 Setting the level of services to be sustained for each area .................................... 16

C.2 How to improve cooperation .................................................................................. 17

Annex D (informative) ECP/ECS planning using management timetable .............................. 18

Annex E (informative) Disaster related information .............................................................. 20

Annex F (informative) ECS status information ...................................................................... 21

Bibliography .......................................................................................................................... 22

Figure 1 – Necessity of electricity continuity for CSC .............................................................. 8

Figure 2 – CSC concept image building up system of ECSs .................................................... 9

Figure A.1 – Calculating total electricity to be needed ........................................................... 12

Figure A.2 – Basic model of ECP/ECS .................................................................................. 13

Figure B.1 – Image of self-backup......................................................................................... 14

Figure B.2 – Image of information cooperation ...................................................................... 15

Figure B.3 – Image of power cooperation .............................................................................. 15

Figure C.1 – Setting CSC type for each area in a city ........................................................... 16

Figure C.2 – Image of improving cooperation ........................................................................ 17

Figure D.1 – Management timetable of layer-structured ECP/ECS ........................................ 19

Table E.1 – Examples of alert information ............................................................................. 20

---------------------- Page: 4 ----------------------
IEC 63152:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SMART CITIES –
CITY SERVICE CONTINUITY AGAINST DISASTERS –
THE ROLE OF THE ELECTRICAL SUPPLY
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 63152 has been prepared by IEC systems committee Smart Cities.

The text of this International Standard is based on the following documents:
FDIS Report on voting
SyCSmartCities/139/FDIS SyCSmartCities/144/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.

---------------------- Page: 5 ----------------------
– 4 – IEC 63152:2020 © IEC 2020

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.
---------------------- Page: 6 ----------------------
IEC 63152:2020 © IEC 2020 – 5 –
INTRODUCTION

Cities are facing many kinds of potential threats which affect the continuity of city services.

There exists, therefore, a great need to establish safe and secure societies in which negative

impacts on city services to the citizens are minimized and city services are continuously

available to them during a period of emergency. There is no doubt that, in modern cities,

electricity plays a critical role in maintaining city services.

This document provides requirements and guidelines to ensure that city services can be

sustained when the power supply from the grids is discontinued because of disasters.

The users of this document are assumed to be city developers, city operators, equipment

manufacturers, essential service providers and disaster management personnel.
---------------------- Page: 7 ----------------------
– 6 – IEC 63152:2020 © IEC 2020
SMART CITIES –
CITY SERVICE CONTINUITY AGAINST DISASTERS –
THE ROLE OF THE ELECTRICAL SUPPLY
1 Scope

This document establishes concepts and gives guidelines to help sustain a variety of city

services on the occasion of a disaster from the perspective of providing electricity. It outlines

the basic concepts on how multiple city services can cooperate and continue by electricity

continuity plan(s) and electricity continuity system(s). It also specifies methods and means to

establish these.
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.

ISO 22301, Societal security – Business continuity management systems – Requirements

3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
3.1
business continuity plan
BCP

documented procedures that guide organizations to respond, recover, resume, and restore to

a pre-defined level of operation following disruption
[SOURCE: ISO 22301:2012, 3.6]
3.2
electricity continuity plan
ECP

documented procedures that guide organizations to ensure continuity of electricity supply to

maintain city services in a business continuity plan that addresses disruption caused by a

critical event
3.3
electricity continuity system
ECS

system required to ensure reliable and effective implementation of functions which are

necessary for ECP
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3.4
city service
service that is performed for the benefit of the public

Note 1 to entry: In this document, services depend on provision of electricity supply.

3.5
city service continuity
CSC

status in which, and capability with which, city services (i.e. public, medical, transportation

communication services) that are provided to users in normal times, continue to be fully or

partly provided, even in a state of emergency in which the normal functions of city

infrastructures are interrupted
3.6
disaster

rapid or slow onset event that causes significant disruption to one or more city services for an

extended period of time

Note 1 to entry: This can include natural disasters, failures of key components or systems whether in hardware or

software, physical damage to systems, and cyber attacks.
3.7
organization

person or group of people that has its own functions with responsibilities, authorities and

relationships to achieve its objectives

Note 1 to entry: The concept of organization includes, but is not limited to, sole-trader, company, corporation, firm,

enterprise, authority, partnership, charity or institution, or part or combination thereof, whether incorporated or not,

public or private.

Note 2 to entry: For organizations with more than one operating unit, a single operating unit can be defined as an

organization.
[SOURCE: ISO 22301:2012, 3.33]
4 Concept of city service continuity (CSC) against disasters

Organizations that receive grid electricity supply need to secure back-up power sources in

order to be able to continue providing their services when the grid electricity supply is

discontinued due to disasters, up until the time when the electricity supply is back to normal.

Activities in a city are supported by the continuous supply of various services (water and

sewage, gas, transport, hospitals, communications, logistics, etc.), and such services are

supplied through facilities and devices, most of which, in general, need electricity from the

grid to operate. Therefore, the loss of the grid electricity supply due to disasters results in the

potential impact of a massive loss of such services.

For the city services to recover quickly so that the major loss of services can be minimized

when a disaster strikes, organizations should prepare in advance to ensure that they can

secure a minimum level of services until electricity supply returns to normal, making

arrangements to facilitate full recovery of services at the earliest possible stage as shown in

Figure 1. Each organization shall establish a business continuity plan (BCP) in order to

address this need.
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There are various approaches to develop an effective BCP. Some cities may conduct it in

order of their specific priorities for critical and lifeline services while others may start trials in a

part of the municipality. It might be implemented in an area where the private sector promotes

urban development, or in a commercial zone or a residential area. It is important that the BCP

takes into consideration the fact that the discontinuity of grid electricity supply due to

disasters may occur in a limited area, not necessarily throughout a whole city, or may occur in

a much wider area than the whole city.
Figure 1 – Necessity of electricity continuity for CSC

In order to secure services in a city at a minimum level during grid power loss due to disasters,

each organization which provides services shall establish a BCP to secure its electricity

supplies appropriately. In addition, plans for interactions between organizations should be

prepared to support the continuity of services according to the requirements of each city, so

that city administrators as well as citizens are able to obtain information on the availability of

services, allowing them to make decisions and to take appropriate actions. This is the concept

of city service continuity (CSC) as shown in Figure 2.

In order to realize this concept, each organization needs to develop an electricity continuity

plan (ECP) focusing on electricity supply in its BCP, while installing an electricity continuity

system (ECS) for implementing its ECP.

Uniform service continuity is not necessarily required for every area in the city as shown in

Figure 2. Areas may include the following.

– Power cooperation area: In some areas, organizations should sustain prioritized services

mainly in critical and lifeline fields by exchanging status information and stabilizing each

other’s electricity supply to the planned service levels.

– Information cooperation area: In some areas, organizations should exchange status

information to provide support, for a situation in hand, such as by provisioning fuel for

generators or sending electric vehicles (EVs) to the affected organizations when grid

electricity supply is disrupted.

– Self-backup area: In some areas without adequate equipment to cooperate with other

areas, organizations should implement backup power to sustain their own planned power

level by themselves.
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Figure 2 – CSC concept image building up system of ECSs
5 Requirements and guideline for electricity continuity plan (ECP)
5.1 General

The ECP is a plan to address critical events caused by disasters, and focuses on the

continuity of electricity supply to maintain city services. The ECP is included in a BCP that

ensures business continuity during disasters.

The ECP provides procedures and criteria to prepare, plan, introduce and operate readiness

options to secure continuous supply on the electricity demand side, as well as identify

elements to be reviewed in order to ensure continuity of city services, as a preparation

against potential stoppage of electricity supply from the grid.

The ECP can be developed at related organizations in public and private sectors, including

the entire city, the town, the neighbourhood, the block, the individual facility, etc.

Stakeholders that develop the ECP include municipal governments, community associations,

area developers and facility managers of buildings such as hospitals, factories and offices

according to criticality.

The ECP includes an emergency plan that helps operators of city services continue to receive

the required electricity supply during disasters, instructions on how to work with other ECPs in

implementation of the emergency plan, and restoration measures to recover the electricity

supply after disasters.
5.2 Planning
5.2.1 General

Organizations shall develop the ECP in reference to ISO 22301 and in the following order of

content: "Context of the organization," "Leadership," "Planning," "Support," "Operation,"

"Performance evaluation" and "Improvement".
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5.2.2 Specific items to be considered

Organizations shall consider the following matters in development of the ECP. Organizations

need to carry out business impact analysis, risk assessment and strategy selection in the

development of ECP and in addition, to consider the following matters.
a) Evaluate necessary electricity capacity (refer to Clause A.1):
1) assessing classification of type and magnitude of disaster;

2) identifying priorities of facilities of the greatest need (e.g. hospitals, public buildings,

transportation systems, communication systems, etc.);

3) analysing the minimum level of services acceptable for the facilities identified and

standing time required;

4) estimating the potential impact caused by stoppage of individual city services due to

grid power loss;
5) estimating the required amount, quality, and cost of electricity.
b) Consider CSC type of cooperation with other ECS (refer to Annex B):

1) selecting ECSs for future cooperation in continuity of electricity supply (refer to

Annex C);

2) identifying and introducing facilities necessary to switch electricity mode when the grid

power supply is halted and to secure safety when electricity supply is back to normal.

c) Design ECS:
1) developing a procedure to disconnect from the grid electricity;

2) classifying and prioritizing the technologies, devices and equipment necessary to

continue power supply;

3) securing safety to avoid unintentional activation of electrotechnical equipment during

recovery process, including to switch them off when the disaster occurs and on after

the disaster;
4) identifying ways to protect against cyber attack;

5) developing a procedure to connect to the grid when electricity supply is back to normal.

d) Assure measures to ensure implementation during disasters such as operation,
maintenance, education and training sessions.
e) Develop a procedure to check the soundness of electrotechnical equipment.

f) Assure critical human resources, conduct periodical training, exercises and continual

improvement of the ECP, including lessons learned from the BCP testing.

As a result, a set of ECP and ECS based on BCP shall be formulated as a series of actions

along temporal phases including preparation for disaster, disaster strike, disaster response,

recovery, and subsequent reviewing for preparation against future disaster (refer to Annex D

as an example.)
6 Requirements for electricity continuity system (ECS)
6.1 General

The ECS indicates the elements required for an effective implementation of the ECP such as

facilities, electrotechnical equipment and operational rules, and also covers the whole system

as an aggregation of each such element, in order to enable continuous electricity supply

during disasters.
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6.2 Requirements for basic function
Organizations shall consider the following practices to establish the ECS:
a) gathering disaster-related information;
b) maintaining electricity at the required level;
c) providing cyber security protection;
d) sending/receiving status information regarding the operation of the ECS;
e) disconnecting from/connecting to power grid;
f) sharing surplus electricity;
g) receiving needed electricity;
h) controlling management systems of xEMS (Energy Management System), e.g. CEMS
(Community Energy Management System), BEMS (Building Energy Management System),
FEMS (Factory Energy Management System), HEMS (Home Energy Management System).

Interface of information and power is needed for the above functions, and the contents of

information should be decided among areas/facilities to cooperate as shown in Clause A.2.

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Annex A
(informative)
Consideration for ECP/ECS
A.1 Evaluation of necessary electricity capacity

To calculate the total electricity capacity required, when developing the ECP, it is necessary

to decide services to be sustained. Their priority, required level and duration should also be

decided by considering the required operation in the event of discontinuity of grid electricity

supply. Finally, the level of electricity required for each service to operate on the agreed level

is figured out, and these are summed up to the total electricity needed. The priorities and

sustaining levels are decided in the BCP.
Figure A.1 indicates a sample case with four services (A, B, C, D).
Figure A.1 – Calculati
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