IEC TS 63222-3:2024

IEC TS 63222-3 ®
Edition 1.0 2024-05
TECHNICAL
SPECIFICATION
Power quality management –
Part 3: User characteristics modelling

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IEC TS 63222-3 ®
Edition 1.0 2024-05
TECHNICAL
SPECIFICATION
Power quality management –
Part 3: User characteristics modelling

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.020  ISBN 978-2-8322-8921-1

– 2 – IEC TS 63222-3:2024 © IEC 2024
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Model category and modelling methodology . 9
4.1 Model category used for power quality assessment of distorting installations . 9
4.2 Model structure . 10
4.2.1 Power supply model . 10
4.2.2 User model . 11
4.3 Consideration on modelling . 12
4.4 Input data requirement . 12
4.5 Characterization of measured data. 13
5 Modelling for different power quality indices . 13
5.1 Voltage deviation . 13
5.1.1 Simplified calculation for voltage deviation analysis . 13
5.1.2 Advanced model for voltage deviation analysis . 14
5.2 Voltage fluctuation and flicker . 14
5.2.1 Simplified calculation for voltage fluctuation and flicker analysis . 14
5.2.2 Advanced model for voltage fluctuation and flicker analysis . 15
5.3 Harmonics/interharmonics . 16
5.3.1 Simplified calculation for harmonics/interharmonics analysis . 16
5.3.2 Advanced model for harmonics/interharmonics analysis . 17
5.4 Unbalance . 18
5.4.1 Simplified calculation for unbalance analysis . 18
5.4.2 Advanced model for unbalance analysis . 18
5.5 Voltage dip . 19
5.5.1 Simplified calculation for voltage dip analysis . 19
5.5.2 Advanced model for voltage dip analysis . 20
Annex A (informative) Typical disturbing users and power quality parameters to be
concerned . 21
Annex B (informative) Model example applications . 22
B.1 New type of installations with power electronic interface . 22
B.1.1 Device with rectifier and inductive DC bus . 22
B.1.2 Device with rectifier and capacitive DC bus . 22
B.1.3 Device with PWM rectifier . 23
B.1.4 Example of hybrid power quality simulation. 24
B.2 Traditional disturbing installations . 25
B.2.1 Large drive systems. 25
B.2.2 Electric arc furnace (EAF) . 26
B.2.3 AC electrified railway . 28
B.3 An application example of recommended methods . 32
Bibliography . 36

Figure 1 – Equivalent power source model . 10
Figure 2 – Thevenin/Norton harmonic model including fundamental frequency . 11
Figure 3 – P = 1 curve . 15
st
Figure 4 – Equivalent phasor model of induction motor . 19
Figure 5 – Unbalance modelling of induction motor based on negative impedance . 19
Figure 5 – Equivalent circuit for voltage dip due to induction motor starting . 19
Figure B.1 – Simplified harmonic models by small size simplified time domain
equivalent model . 23
Figure B.2 – Harmonic assessment results based on frequency domain and time
domain hybrid simulation . 25
Figure B.3 – Norton equivalent model . 26
Figure B.4 – EAF modelling by two chaotic functions per phase and simulated flicker
levels . 27
Figure B.5 – Principal arrangement of traction system . 28
Figure B.6 – High speed train traction system with PQ recorders and VSC compensator . 30
Figure B.7 – Recordings of voltage unbalances with and without VSC compensator . 30
Figure B.8 – On-site measurements with and without VSC compensator . 31
Figure B.9 – Simulation of unbalances and with VSC compensation . 31
Figure B.10 – Simulated harmonic distortions and VSC compensation currents . 32
Figure B.11 – Schematic diagram of a grid including nonlinear loads . 33
Figure B.12 – Starting curve of an induction motor and power curve of a controllable load . 34
Figure B.13 – Current wave forms and spectra of electric loads . 35

Table 1 – Example of representation/Template of the equivalent power source . 10
Table 2 – Example of representation/Template of the equivalent harmonic current
source . 11
Table 3 – Example of representation/template of the equivalent frequency impedance. 12
Table A.1 – Type of installation . 21
Table B.1 – Modelling methods of nonlinear electric loads . 33

– 4 – IEC TS 63222-3:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER QUALITY MANAGEMENT –
Part 3: User characteristics modelling

FOREWORD
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