IEC/IEEE 60076-57-129:2017
(Main)Power transformers - Part 57-129: Transformers for HVDC applications
Power transformers - Part 57-129: Transformers for HVDC applications
IEC/IEEE 60076-57-129:2017(E) specifies requirements of liquid-immersed three-phase and single-phase converter transformers for use in high voltage direct current (HVDC) power transmission systems including back-to-back applications. It applies to transformers having two, three or multiple windings.
This document does not apply to:
- converter transformers for industrial applications (see IEC 61378-1 or IEEE C57.18.10);
- converter transformers for traction applications (see IEC 60310).
This publication cancels and replaces the first edition of IEC 61378-2 published in 2001 and IEEE Std C57.129™ published in 2007.
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IEC/IEEE 60076-57-129 ®
Edition 1.0 2017-11
INTERNATIONAL
STANDARD
Power transformers –
Part 57-129: Transformers for HVDC applications
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IEC/IEEE 60076-57-129 ®
Edition 1.0 2017-11
INTERNATIONAL
STANDARD
Power transformers –
Part 57-129: Transformers for HVDC applications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.180 ISBN 978-2-8322-4447-0
– 2 – IEC/IEEE 60076-57-129:2017
IEC/IEEE 2017
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
2.1 IEC references . 8
2.2 IEEE references . 9
3 Terms, definitions and symbols. 9
3.1 Terms and definitions . 9
3.2 Symbols . 10
4 Use of normative references . 11
5 General requirements . 11
5.1 General . 11
5.2 Service conditions . 11
5.2.1 General . 11
5.2.2 Temperature . 11
5.2.3 Load current . 11
5.2.4 AC voltage . 11
5.2.5 Direction of power flow . 11
5.3 Unusual service conditions . 12
5.4 Loading of transformer above rating . 12
6 Rating data . 12
6.1 General . 12
6.2 Rated voltage . 12
6.3 Rated current . 12
6.4 Rated frequency . 12
6.5 Rated power . 12
7 Losses . 13
7.1 General . 13
7.2 No-load loss . 13
7.3 Load loss under rated frequency conditions . 13
7.4 Load loss under service conditions . 13
7.5 Determination of hot-spot temperature . 14
8 Test requirements . 15
8.1 General . 15
8.1.1 Routine tests . 15
8.1.2 Type tests . 15
8.1.3 Special tests . 15
8.1.4 Commissioning tests . 15
8.2 Test applicability . 16
8.2.1 General . 16
8.2.2 DC withstand voltage test . 16
8.2.3 Polarity reversal test . 16
8.2.4 AC applied withstand test for valve side winding(s) . 16
8.3 Dielectric test voltage levels . 17
8.3.1 Line windings . 17
8.3.2 Valve windings . 17
8.4 Induced voltage level with partial discharge measurement . 18
IEC/IEEE 2017
9 Tests . 18
9.1 General . 18
9.1.1 Applicable tests . 18
9.1.2 Test sequence . 18
9.1.3 Ambient temperature . 18
9.1.4 Assembly . 18
9.1.5 Converter transformers for connection to gas-insulated equipment . 19
9.2 Load loss and impedance measurements . 19
9.2.1 General . 19
9.2.2 Calculation procedure . 19
9.3 Switching impulse test . 20
9.4 Applied switching impulse test on the valve side winding . 20
9.5 Lightning impulse tests . 20
9.6 DC withstand voltage test . 20
9.6.1 Applicability . 20
9.6.2 Transformer test temperature . 20
9.6.3 Polarity . 20
9.6.4 Test procedure . 21
9.6.5 Acceptance criteria . 21
9.7 Polarity reversal test . 21
9.7.1 Applicability . 21
9.7.2 Transformer test temperature . 21
9.7.3 Test procedure . 21
9.7.4 Acceptance criteria . 22
9.8 Extended polarity-reversal test . 23
9.8.1 Applicability . 23
9.8.2 Transformer test temperature . 23
9.8.3 Test procedure . 23
9.8.4 Acceptance criteria . 25
9.9 AC applied voltage test for valve side winding(s) . 25
9.9.1 Test procedure . 25
9.9.2 Acceptance criteria . 25
9.10 AC applied voltage test on line side winding(s) . 25
9.11 AC induced voltage test with partial discharge measurement . 26
9.11.1 General . 26
9.11.2 Acceptance criteria . 26
9.12 Induced voltage test including running of oil pumps . 26
9.13 Temperature-rise test . 26
9.13.1 General . 26
9.13.2 Test procedure . 27
9.13.3 Tank surface temperature rise measurement . 28
9.14 Load current test . 28
9.15 Sound level measurement . 28
9.16 Insulation power-factor test .
...
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