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GB/T 20990.1-2020Thyristor valves for high voltage direct current (HVDC) power transmission - Part 1: Electrical testing (English PDF)

高压直流输电晶闸管阀第1部分：电气试验

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 14, 2020

Implementation date

July 1, 2021

Scope

GB/T 20990.1-2020 is the English-translated version of 高压直流输电晶闸管阀第1部分：电气试验.

GB/T 20990.1-2020 is the Chinese standard "Thyristor valves for high voltage direct current (HVDC) power transmission - Part 1: Electrical testing".

Its scope clause reads: This part of GB/T 20990 specifies the items, requirements and criteria for valve type tests and product tests: This part is applicable to thyristor valves used in HVDC transmission or as part of a back-to-back system commutated converter in the power grid: Metal oxide arresters are directly connected to both ends of the valve: This section is limited to electrical type tests and product tests: The tests specified in this section are based on air-insulated valves: Other types of valves can also refer to the requirements and acceptance criteria of this section:. Its clauses include terms and definitions.

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Document preview — GB/T 20990.1-2020

National Standard of the People's Republic of China

ICS: 29.200
Classification: K 46
Replacing: GB/T 28563-2012; GB/T 20990.1-2007

Issued by: State Administration for Market Regulation, China National Standardization Administration

Preface
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
5 Type test list
6 Valve support insulation test
7 Multiple valve unit (MVU) insulation test
8 Insulation test between valve terminals
9 Periodic trigger and shutdown test
10 Transient forward voltage test during recovery period
11 Valve fault current test
12 Valve anti-electromagnetic interference test
13 Special function test and fault tolerance test
14 Product test
15 Method of determining loss
16 Description of type test results
Appendix A (Normative Appendix) Test safety factor
Appendix B (Normative Appendix) Partial Discharge Measurement

1 Scope

This part of GB/T 20990 specifies the items, requirements and criteria for valve type tests and product tests:

This part is applicable to thyristor valves used in HVDC transmission or as part of a back-to-back system commutated converter in the power grid:

Metal oxide arresters are directly connected to both ends of the valve: This section is limited to electrical type tests and product tests:

The tests specified in this section are based on air-insulated valves: Other types of valves can also refer to the requirements and acceptance criteria of this section:

2 Normative references

The following documents are indispensable for the application of this document: For dated reference documents, only the dated version applies to this article

Pieces: For undated references, the latest version (including all amendments) applies to this document:

GB/T 311:1 Insulation coordination Part 1: Definitions, principles and rules (GB/T 311:1-2012, IEC 60071-1:2006,

MOD)

GB/T 7354 High Voltage Test Technology Partial Discharge Measurement (GB/T 7354-2018, IEC 60270:2000, MOD)

GB/T 11032 AC gapless metal oxide arrester (GB/T 11032-2010, IEC 60099-4::2006, MOD)

GB/T 13498-2017 Terminology for HVDC Transmission (IEC 60633:2015, MOD)

GB/T 16927 (all parts) High voltage test technology (IEC 60060)

GB/T 16927:1 High Voltage Test Technology Part 1: General Definition and Test Requirements (GB/T 16927:1-2011,

IEC 60060-1:2010, MOD)

GB/T 20989-2017 Determination of losses in HVDC converter stations (IEC 61803:2011, IDT)

GB/T 27025 General requirements for the competence of testing and calibration laboratories (GB/T 27025-2019, ISO /IEC 17025:2017,

IDT)

3 Terms and definitions

The following terms and definitions defined in GB/T 13498-2017 apply to this document:

3:1 Terminology for insulation coordination

3:1:1

Test withstand voltage

Standard waveform test voltage: An undamaged, complete new valve under specified conditions, with specified number of applications or specified duration

When subjected to the test voltage, no breakdown discharge occurs, and all other acceptance criteria for the specific test requirements are met:

3:1:2

Steep frontimpulse

The peak time is shorter than the standard lightning impulse, but not shorter than the extremely fast wavefront voltage defined in GB/T 311:1:

Shock:

GB/T 37404 | GB/T 31487.3 | GB/T 3859.1 | GB/T 20996.1 | GB/T 20995 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 67 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 311 · IEC 60071 · IEC 60270 · IEC 60099 · IEC 60633 · GB/T 16927 · IEC 60060 · IEC 61803 · IEC 17025

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