IEC TS 63384-1:2023

IEC TS 63384-1
®

Edition 1.0 2023-03
TECHNICAL
SPECIFICATION

colour
inside


Power system stability control –
Part 1: Guideline for framework design of power system stability control
IEC TS 63384-1:2023-03(en)

---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2023 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
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.


IEC Secretariat Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland

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.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.

Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.

---------------------- Page: 2 ----------------------
IEC TS 63384-1

®


Edition 1.0 2023-03




TECHNICAL



SPECIFICATION








colour

inside










Power system stability control –

Part 1: Guideline for framework design of power system stability control


























INTERNATIONAL

ELECTROTECHNICAL


COMMISSION





ICS 33.200 ISBN 978-2-8322-6629-8



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


® Registered trademark of the International Electrotechnical Commission

---------------------- Page: 3 ----------------------
– 2 – IEC TS 63384-1:2023 © IEC 2023
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Classification of system states . 9
4.1 General . 9
4.2 The characteristics of normal state . 9
4.3 The characteristics of alert state . 9
4.4 The characteristics of emergency state . 9
4.5 The characteristics of blackout state . 9
4.6 Restorative state . 9
5 Contingency list and contingency analysis . 10
5.1 Contingency list . 10
5.2 Contingency analysis . 10
6 Objective and general requirements of control for power system stability . 10
6.1 Objective . 10
6.2 General requirements . 10
7 Classification of stability control type . 11
8 Control decision planning . 11
8.1 General . 11
8.2 The stability control types applied for the contingency list . 11
8.3 The method of control decision planning . 11
8.4 Approach for enhancing the adaptability of stability control . 12
8.5 Approach for enhancing control decision coordination . 12
9 Framework of stability control . 13
10 Considerations in the implementation of stability control schemes . 13
10.1 General . 13
10.2 System study . 13
10.3 Coordination with other protection and control systems . 14
10.4 Impact of neighbouring systems on stability control . 14
10.5 Communication system and cyber-security. 14
Bibliography . 15

Figure 1 – The general framework of stability control . 13

---------------------- Page: 4 ----------------------
IEC TS 63384-1:2023 © IEC 2023 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

POWER SYSTEM STABILITY CONTROL –

Part 1: Guideline for framework design of power system stability control

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.
IEC TS 63384-1 has been prepared by subcommittee 8C, Network management in
interconnected electric power systems, of IEC technical committee 8: System aspects of
electrical energy supply. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
8C/47/DTS 8C/61/RVDTS

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.

---------------------- Page: 5 ----------------------
– 4 – IEC TS 63384-1:2023 © IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all parts in the IEC 63384 series, published under the general title Power system
stability control, 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 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 document 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 TS 63384-1:2023 © IEC 2023 – 5 –
POWER SYSTEM STABILITY CONTROL –

Part 1: Guideline for framework design of power system stability control



1 Scope
This part of IEC 63384 provides guidance for power system stability control framework design.
It covers the uniform use of terms and definitions, general objectives and principles for power
system stability control, the classification of power system stability control, and the framework
combining several types of stability controls in a coordinated and cost-effective (risk-based)
manner.
In accordance with this guideline, the framework is designed to cope with disturbances of
different probabilities of occurrence and impact on power system security and stability. Effective
control approaches are designed to prevent or minimize the scope of future blackouts.
2 Normative references
There are no normative references in this document
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
power system stability control
< electric power system> control in a power system which prevents system insecurity, instability
and collapse caused by disturbances and minimizes further loss of power supply
Note 1 to entry: Remedial Action Scheme, System Integrity Protection Schemes (SIPS), Special Protection System
and System Protection Scheme are typical examples of stability control implementation.
3.2
power system stability control framework
framework designed to describe the fundamental principles of power
system stability control, composed of a contingency list, the objective of control, the types of
stability control, methods of control decision planning and control activation
Note 1 to entry: Usually, several types of stability control are combined to prevent system insecurity, instability,
collapse, and blackouts upon occurrence of contingencies, so that the adaptability of each type of stability control
can be enhanced and the coordination of different types of stability controls can be facilitated.
3.3
normal state
state wherein all system variables are within the normal range and no
equipment is overloaded, and power system operates in a secure manner and is able to
withstand predefined contingencies without violating any of the constraints

---------------------- Page: 7 ----------------------
– 6 – IEC TS 63384-1:2023 © IEC 2023
3.4
alert state
state wherein all system variables are within the normal range and no
equipment is overloaded, and power system is unable to enter into its normal state if predefined
contingencies occur without control actions
3.5
emergency state
stable state in which some system components are stressed beyond
their ratings, or some bus voltages or system frequency are outside tolerances
[SOURCE: IEC 60050-692:2017, 692-02-06]
3.6
blackout state
state where the transmission system contains areas of almost no
voltage as the consequence of the tripping of generation units, transmission equipment, or both
3.7
restorative state
state in which actions are performed to re-establish a normal state
after the blackout state or the emergency state
3.8
contingency
event that usually involves the loss of one or more components, which
affects the electric power system at least momentarily
3.9
contingency list
list of contingencies to be considered in order to test the compliance
with the operational security limits
3.10
predefined contingency
contingency to be predefined in order to test the compliance with the
operational security limits
3.11
normal type of contingency
contingency that incurs low risk to the secure and stable operation of
the power system
3.12
exceptional type of contingency
contingency that incurs medium risk to the secure and stable operation
of the power system
3.13
extreme type of contingency
contingency that incurs high risk to the secure and stable operation of
the power system

---------------------- Page: 8 ----------------------
IEC TS 63384-1:2023 © IEC 2023 – 7 –
3.14
risk
combination of the probability of occurrence of harm and the severity
of that harm
Note 1 to entry: Risk can consider the probability of contingency occurrence and its impact on power system security
and stability. Risk may be assessed by considering the probability of implementing stability control and its cost due
to the contingency (if the impact of the contingency cannot be quantified).
[SOURCE: ISO/IEC Guide 51:2014, 3.9, modified – The Note to entry is different]
3.15
compliance
conformity level of stability control schemes in respect
of the requirements of national energy/electricity law and regulations
3.16
dependability
ability to perform timely stability control actions and to
prevent unintended stability control action
3.17
accuracy
ability to implement the stability control action precisely
at the right time with the right control amount and the correct control command
3.18
adaptability
ability to carry out appropriate control actions
considering the operating condition, the contingencies, the available control resources and the
control objectives
Note 1 to entry: The control decision set should be adjusted to the current operating condition and the contingencies
occurred. The available control resources should also be correctly identified.
3.19
coordination
ability to fully explore characteristics of each type of
stability control scheme for control decision planning
Note 1 to entry: Multiple automatic control schemes implemented in a region should be coordinated to avoid
undesirable control actions.
3.20
rapidness
ability to implement control actions as fast as needed,
so the power system can satisfactorily recover from the ongoing disturbance
3.21
economy
cost-effectiveness of stability control, meaning a
balance between technical performance and economic cost

---------------------- Page: 9 ----------------------
– 8 – IEC TS 63384-1:2023 © IEC 2023
3.22
preventive control
type of stability control, which is implemented before
the occurrence of disturbances in order to prevent a power system from exhibiting a dynamically
insecure behaviour if one of the predefined contingency scenarios would actually occur
Note 1 to entry: Preventive control is normally invoked by system operators, while automatic activation is permitted
as well.
Note 2 to entry: Typical preventive control actions include generation re-dispatching, system reconfiguration, tap
changer setpoint adjustment, high voltage direct current (HVDC) power change, shunt reactor/capacitor tripping or
closing, etc.
3.23
event-based control
type of stability control, which is immediately and
automatically triggered by one of the predefined contingencies in order to prevent system
instability or limit violation of key operating parameters
Note 1 to entry: Typical event-based control actions include generation tripping, load shedding, HVDC fast power
running-up or running-back, shunt reactor/capacitor tripping or closing, etc.
3.24
response-based control
type of stability control which is au
...