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IEC TS 63297
Edition 1.0 2021-03
TECHNICAL
SPECIFICATION
colour
inside
Sensing devices for non-intrusive load monitoring (NILM) systems
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IEC TS 63297
Edition 1.0 2021-03
TECHNICAL
SPECIFICATION
colour
inside
Sensing devices for non-intrusive load monitoring (NILM) systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-9444-4
– 2 – IEC TS 63297:2021 IEC 2021
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Elements of a NILM system . 8
4.1 General . 8
4.2 NILM sensing device . 9
4.3 NILM analytics . 9
5 Classification of NILM sensing devices (NSD) . 9
5.1 General . 9
5.2 Definition of NSD classes. 10
5.3 Other NSD parameters . 11
6 Operation of NILM systems. 12
Annex A (informative) Introduction of NILM process . 13
A.1 Example of NILM process . 13
A.2 Data and techniques for NILM . 13
A.3 Examples of NILM sensing devices (NSD) . 14
Annex B (informative) Data bit rate . 16
Annex C (informative) Measuring equipment compared to NILM sensing devices . 17
C.1 General . 17
C.2 Types of measuring equipment . 17
C.3 Overview of requirements for measuring equipment . 17
C.4 Relationship between NILM sensing devices and measuring equipment . 19
Bibliography . 20
Figure 1 – Principle of non-intrusive load monitoring (NILM) . 5
Figure 2 – Elements of a NILM system . 8
Figure 3 – Component view of a NILM sensing device (NSD) . 9
Figure 4 – Framework for NILM systems operation . 12
Figure A.1 – Example of NILM System implementation . 13
Figure A.2 – Example of NILM sensing device installed in a home panelboard . 14
Figure C.1 – Notion of accuracy class . 18
Table 1 – Classification of NSDs according to the input sampling frequency . 10
Table 2 – Classification of NSDs according to output data rate . 10
Table 3 – Classification of NSDs according to the data bit rate . 10
Table A.1 – Example of data and techniques used in NILM systems . 14
Table A.2 – Examples of NILM sensing devices and typical specification . 15
Table B.1 – Examples of data bit rate calculation . 16
Table C.1 – Overview of measuring equipment . 17
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SENSING DEVICES FOR NON-INTRUSIVE
LOAD MONITORING (NILM) SYSTEMS
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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IEC TS 63297 has been prepared by IEC technical committee 85: Measuring equipment for
electrical and electromagnetic quantities. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
85/727/DTS 85/750/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.
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 /members_experts/refdocs. The main document types developed by IEC are
described in greater detail at /standardsdev/publications.
– 4 – IEC TS 63297:2021 IEC 2021
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
• transformed into an International standard,
• 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.
INTRODUCTION
Non-intrusive load monitoring (NILM), or non-intrusive appliance and load monitoring (NIALM),
is a process for providing estimated energy usage, e.g. by type of use (heating, cooling, etc.)
or type of appliance (microwave, etc.) based on load signatures at a single point in the
installation.
NILM systems can be used to survey the specific uses of electrical power in homes, buildings
or industrial areas (see Figure 1).
Figure 1 – Principle of non-intrusive load monitoring (NILM)
At the moment, NILM systems are essentially used in AC distribution networks, but DC networks
are not excluded.
– 6 – IEC TS 63297:2021 IEC 2021
SENSING DEVICES FOR NON-INTRUSIVE
LOAD MONITORING (NILM) SYSTEMS
1 Scope
This Technical Specification is an attempt to provide classification of NILM sensing devices for
use in NILM systems, according to the state of the art of NILM technologies.
The classification of NILM analytics and NILM systems, as well as performance indicators for
NILM systems, can be considered in the future.
NILM systems produce estimated disaggregation into energy usages. When accurate
measurement and analysis of energy consumption and/or other electrical parameters is needed
(e.g. for monitoring the electrical installation), systems based on standardized measuring
devices (e.g. PMD, PQI or meters) are used.
NOTE Standardized measuring devices have guaranteed accuracy over a specified range and have limited
deviations in presence of influence quantities (temperature, frequency deviations, etc.) in addition to safety and
constructional requirements. See Annex C for more information.
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 terminological databases for use in s
...