IEC TS 63222-2:2023

IEC TS 63222-2 ®
Edition 1.0 2023-10
TECHNICAL
SPECIFICATION
colour
inside
Power quality management –
Part 2: Power Quality Monitoring System

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IEC TS 63222-2 ®
Edition 1.0 2023-10
TECHNICAL
SPECIFICATION
colour
inside
Power quality management –
Part 2: Power Quality Monitoring System

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020  ISBN 978-2-8322-7588-7

– 2 – IEC TS 63222-2:2023 © IEC 2023
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Purposes and applications analysis . 8
5 Preliminary study . 9
5.1 Background information collection . 9
5.2 Selection of monitoring sites . 10
5.3 Selection of monitoring parameters . 11
5.4 Voltage Transformer (VT)/Current Transformer (CT) characteristics analysis . 12
5.5 Data sources . 12
6 PQ monitoring system structure and functions . 13
6.1 General . 13
6.2 Function modules . 14
6.2.1 Data collection . 14
6.2.2 Communication . 14
6.2.3 Data storage . 15
6.2.4 Data processing and analysis . 15
6.3 System structure . 15
6.3.1 General . 15
6.3.2 Brower/Server (B/S) and Client/Server (C/S) architecture . 15
6.3.3 Centralized and distributed architecture . 15
7 Communication and protocol . 16
7.1 General . 16
7.2 Communication . 17
7.2.1 Communication mode . 17
7.2.2 Communication interface . 17
7.3 Protocol . 17
8 Data storage and management . 18
8.1 Data storage . 18
8.2 Data management . 19
8.2.1 Data backup . 19
8.2.2 Data quality management . 19
8.2.3 Missing data checking . 19
8.2.4 Data security . 20
8.3 Data setting . 20
8.3.1 General . 20
8.3.2 Time aggregation setting . 20
8.3.3 Grouping and sub-grouping setting . 20
8.3.4 Flagged data pre-processing setting . 20
8.3.5 Sites attribution setting . 20
8.3.6 Time setting . 20
8.3.7 Accessing setting. 21
8.4 Power quality assessment . 21
8.5 Advanced data analysis . 21
Annex A (informative) Characteristics of instrument transformers . 22

A.1 Inductive instrument transformers . 22
A.1.1 Inductive voltage transformers . 22
A.1.2 Inductive current transformers . 22
A.2 Low-power instrument transformers (LPIT) . 23
A.2.1 Low-power voltage transformers (LPVT) . 23
A.2.2 Low-power current transformers (LPCT) . 24
A.3 Capacitive voltage transformers (CVT) . 24
Bibliography . 26

Figure 1 – Function modules of power quality monitoring system . 13
Figure 2 – Structure of a typical power quality monitoring system . 14
Figure 3 – Centralised architecture . 16
Figure 4 – Distributed architecture . 16
Figure A.1 – Frequency response of a typical 420 kV inductive VT . 22
Figure A.2 – Different types of LPVTs . 23
Figure A.3 – Estimated amplitude and phase error up to 2 kHz . 23
Figure A.4 – Frequency response of an optical current transformer . 24
Figure A.5 – Frequency response of a Rogowski current transformer . 24
Figure A.6 – Frequency response of a typical 220 kV CVT . 25

– 4 – IEC TS 63222-2:2023 © IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER QUALITY MANAGEMENT –
Part 2: Power quality monitoring system

FOREWORD
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IEC TS 63222-2 has been prepared by 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
8/1658/DTS 8/1674/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, Pa
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