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

Foreword

GB/T 20990 "HVDC Thyristor Valves" plans to publish the following parts:

---Part 1: Electrical test;

---Part 2: Terminology;

---Part 3: Basic ratings (limits) and characteristics:

This part is Part 1 of GB/T 20990:

This section was drafted in accordance with the rules given in GB/T 1:1-2009:

This part replaces GB/T 20990:1-2007 "HVDC Thyristor Valve Part 1: Electrical Test" and

GB/T 28563-2012 "Electrical Test of Thyristor Valves for +/-800kV UHV DC Transmission":

Compared with GB/T 20990:1-2007, the main technical changes in this part are as follows:

---Modified the normative reference documents (see Chapter 2, Chapter 2 of the:2007 edition);

--- Deleted the terms "internal and external insulation", "valve support", "valve structure" and "redundant thyristor level" (see Chapter 3 of the:2007 edition);

--- Amend "dielectric test" to "insulation test" (see 3:3:1, 4:3:1, Chapter 6, Chapter 7, Chapter 8,:2007 edition

3:3:1, 4:3:1, Chapter 6, Chapter 7, Chapter 8);

--- Modify the "test object" to "test product" (see 4:1:2, 6:2, 8:2, 8:4:2, 9:2, 10:2, 11:2, 12:2, 13:2, 14:3,:2007

Version 4:1:2, 6:2, 8:2, 8:4:2, 9:2, 10:2, 11:2, 12:2, 13:2, 14:2);

---The content of the item "pressure" in the "atmospheric correction" has been revised (see 4:2, 4:2 of the:2007 edition);

--- Change the suspension paragraphs in Chapters 4:4, 9:3:1, 9:3:3, 12:3, and Chapter 14 of the:2007 edition to 4:4:1, 9:3:2:1, 9:3:4:1, respectively

12:3:1, 14:1 "General", the number of the following clauses is extended (see 4:4, 9:3:2, 9:3:4, 12:3, Chapter 14,:2007 edition

4:4, 9:3:1, 9:3:3, 12:3, Chapter 14);

---Modified the number of faulty thyristor levels allowed during the type test (see Table 1, Table 1 of the:2007 edition);

---Modified the type test item table (see Table 2, Table 2 of the:2007 edition);

--- Deleted the "Valve support AC current test" in "Before the test, the valve support should be short-circuited to ground for at least 2h" requirements (see:2007

Version 6:3:2);

---Added a "steep wave front impact test of valve bracket" (see 6:3:6);

---Modified the AC voltage test requirements for multiple valve units (see 7:3:2, 7:3:2 of the:2007 edition);

---Added "Multiple Valve (MVU) Steep Wave Front Impact Test" (see 7:3:5);

---Added a "valve wet DC voltage test" (see 8:3:2);

---Modified the valve AC voltage test requirements (see 8:3:3, 8:3:2 of the:2007 edition);

--- Modify "VDSM---rated thyristor forward surge voltage non-repetitive peak value" to "VDSM---rated thyristor off-state not

Repetitive peak voltage" (see 8:3:4, 8:3:3 of the:2007 edition);

---Added "valve wet operation impact test" (see 8:3:6);

---Modified the expression of withstand voltage in "valve steep wave front impact test" (see 8:3:8, 8:3:6 in:2007 edition);

--- Modify "Uv0max---the highest steady state no-load phase-to-phase voltage on the transformer valve side" to "Uv0max---the highest steady state no-load voltage on the transformer valve side"

Load line voltage" (see 9:3:2:1, 9:3:1 in:2007 edition);

--- Change "alphamax" in the relevant expressions of "Maximum Continuous Trigger Voltage Test", "Maximum Continuous Recovery Voltage Test" and "Hot Running Test"

"Mumax" and "gammamax" are respectively modified to "alpha", "µ" and "gamma" (see 9:3:2:2~9:3:2:4, 9:3:1:1~9:3:1:3 of the:2007 edition);

---Modified the expression of the recovery step voltage in the "Maximum Recovery Voltage Test" (see 9:3:2:3, 9:3:1:2 of the:2007 edition);

---Modified the expression of the recovery step voltage in the "Minimum Turn-Off Angle Test" (see 9:3:4:3, 9:3:3:2 of the:2007 edition);

--- Modify "Uv0max---the highest steady-state no-load phase-to-phase voltage on the transformer valve side" to "Uv0max---the highest stable voltage on the transformer valve side"

State no-load line voltage", modify the "delay angle" to "trigger angle" (see 9:3:3,:2007 edition 9:3:2);

---Respectively modify "nt" and "nv" in the voltage expression of "Minimum AC Voltage Test" to "Ntut", "Nt", "Uv0min---Transformer

The lowest steady-state no-load phase-to-phase voltage on the valve side" is revised to "Uv0min---the lowest steady-state no-load line voltage on the valve side of the transformer" (see 9:3:4:

1, 9:3:3 of the:2007 edition);

--- Modify the "alphamin" in the relevant expressions of the "minimum firing angle test" to "alpha" (see 9:3:4:2, 9:3:3:1 of the:2007 edition);

---Modified the minimum shut-off angle test requirements (see 9:3:4:3, 9:3:3:2 of the:2007 edition);

---Modified the requirements of transient undervoltage test (see 9:3:5, 9:3:4 in:2007 edition);

---Modified the requirements for intermittent DC current test (see 9:3:6, 9:3:5 in:2007 edition);

--- Added "protective trigger continuous operation test" (see 9:3:7);

---Added "Valve loss verification" (see 9:3:8);

---Modified the test purpose of the transient forward voltage test during the recovery period (see 10:1, 10:1 of the:2007 edition);

---Modified the transient forward voltage test requirements during the recovery period (see 10:3, 10:3 of the:2007 edition);

---Modified the test purpose of the valve fault current test (see 11:1, 11:1 in the:2007 edition);

---Modified the single-wave fault current test requirements plus forward voltage (see 11:3:2, 11:3:1 of the:2007 edition);

---Modified the test purpose of the valve anti-electromagnetic interference test (see 12:1, 12:1 of the:2007 edition);

---Modified the test purpose of special function test and fault tolerance test (see 13:1,:2007 edition of 13:1);

---Modified the value of the operating test safety factor (see A:3,:2007 edition of A:5);

---Modified the partial discharge measurement requirements (see B:1,:2007 edition of B:1);

--- Deleted Appendix C (see Appendix C of the:2007 edition):

Compared with GB/T 28563-2012, the main technical changes in this part are as follows:

--- The terms "internal insulation and external insulation", "valve support", "valve structure", "redundant thyristor level", "thyristor level", "valve assembly", and "multiple

"Valve unit" "High (pressure) end 12-pulse converter bridge" and "Low (pressure) end 12-pulse converter bridge" (see Chapter 3 of the:2012 edition);

---The content of the item "pressure" in the "atmospheric correction" has been revised (see 4:2, 4:2 of the:2012 edition);

---Modified the number of thyristor levels allowed to be damaged in the type test (see Table 1, Table 1 of the:2012 edition);

--- Modified the "test product" in "Multiple Valve Unit (MVU) Insulation Test" (see 7:2,:2012 edition of 7:2);

--- Modify "SIPLm" in the voltage expression of "Multiple Valve Unit Operation Impact Test" to "USIPLm" (see 7:3:3,:2012 edition

7:3:3);

--- Modify "LIPLm" in the voltage expression of "Multiple Valve Unit Lightning Impulse Test" to "ULIPLm" (see 7:3:4,:2012 edition

7:3:4);

---Modified the valve AC voltage test requirements (see 8:3:3, 8:3:3 of the:2012 edition);

--- Modify "VDSM---rated thyristor forward surge voltage non-repetitive peak value" to "VDSM---rated thyristor off-state not

Repetitive peak voltage" (see 8:3:4, 8:3:4 of the:2012 edition);

--- Deleted item f) in "Valve Impact Test" (see 8:3:4 in:2012 edition);

---Modified the "test product" in "periodical trigger and shutdown test" (see 9:2,:2012 edition of 9:2);

---Modified the "general rules" for periodic triggering and shutdown tests (see 9:3:1, 9:3:1 of the:2012 edition);

--- Modify the "delay angle" to "trigger angle" (see 9:3:2:2,:2012 edition of 9:3:2:2);

---Modified the requirements for the intermittent DC current test (see 9:3:6, 9:3:6 of the:2012 edition);

---Modified the purpose of the transient forward voltage test during the recovery period (see 10:1, 10:1 in the:2012 edition);

---The purpose of the valve fault current test is modified (see 11:1, 11:1 in the:2012 edition);

---Modified the "general requirements" of "valve fault current test" (see 11:3:1,:2012 edition 11:3:1);

--- In the "Valve Electromagnetic Compatibility Test", the end of paragraph 2 of "Test Purpose" is added "This is because, when the converter station is in normal operation, this

Conditions equivalent to these tests may appear, and these conditions will not cause the converter station to trip: "(See 12:1);

---Modified the "Overview" of "Product Testing" (see 14:1, 14:1 of the:2012 edition);

--- The title of the article "Purpose of Routine Test" is amended to "Routine Test-Minimum Requirements" (see 14:5,:2012 edition of 14:5);

--- Amend "Appendix A" to "Appendix B" (see Appendix B, Appendix A of the:2012 edition);

--- Amend "Appendix B" to "Appendix A" (see Appendix A, Appendix B of the:2012 edition):

This part uses the redrafting method to modify and adopt IEC 60700-1:2015 "HVDC Thyristor Valve Part 1: Electrical Test

Experience:

Compared with IEC 60700-1:2015, this part adds 6:3:6, 7:3:5, 8:3:2, 8:3:6, 9:3:7, 9:3:8 in structure, and changes the original

8:3:2~8:3:4, 8:3:5, 8:3:6 are adjusted to 8:3:3~8:3:5, 8:3:7, 8:3:8 respectively:

Technical differences between this part and IEC 60700-1:2015 (the clauses involved in these differences have been

The vertical single line (|) is marked) and the reasons are as follows:

---Regarding normative reference documents, this part has made adjustments with technical differences to adapt to my country's technical conditions and adjustments

It is concentratedly reflected in Chapter 2 "Normative Reference Documents", and the specific adjustments are as follows:

* Replace IEC 60071-1 with GB/T 311:1 which is modified to adopt international standards;

* Replace IEC 60270 with GB/T 7354 which is modified to adopt international standards;

* Replace IEC 60099-4 with GB/T 11032 modified to adopt international standards;

* Replace IEC 60060 (all parts) with GB/T 16927 (all parts) which is modified to adopt international standards;

* Replace IEC 60060-1 with GB/T 16927:1 which is modified to adopt international standards;

* Replace IEC 61803 with GB/T 20989-2017 which is equivalent to adopting international standards;

* Replace IEC 17025 with GB/T 27025 which is equivalent to adopting international standards;

* Added reference to GB/T 13498-2017;

--- Deleted the terms "internal and external insulation", "valve support", "valve structure", "redundant thyristor level", "thyristor level", "valve assembly" and "multiple

Heavy valve unit" (see 3:1 and 3:2 of IEC 60700-1:2015);

--- Deleted the "Note" in "Type Test Terms" and "Product Test Terms" (see IEC 60700-1:2015 3:3 and 3:4);

--- Deleted part of the content in the "Summary" of "Type Test Success Criterion" (see 4:4:1 of IEC 60700-1:2015);

---Added footnotes to Table 2 to distinguish between optional items (see Table 2);

--- Modify "50% of the highest test voltage" to "50% of the 1min test voltage" (see 6:3:2, 6:3:3, 7:3:1 and 8:3:1,

IEC 60700-1:2015 6:3:2, 6:3:3, 7:3:1 and 8:3:1);

--- Modify "50% of the highest test voltage" to "50% of the 15s test voltage" (see 8:3:3, IEC 60700-1:2015

8:3:2);

---Correct the valve DC voltage test voltage expression "Utdv=+/-Udn+/-k7" to "Utdv=+/-Udnxk7" (see 8:3:1,

IEC 60700-1:2015 8:3:1);

--- Correct "VDSM---Thyristor non-repetitive forward surge peak voltage rating" to "VDSM---Thyristor off-state non-repetitive peak

Value voltage rating" (see 8:3:4, 8:3:4 of IEC 60700-1:2015);

--- Added requirements for coolant: "The coolant should reflect the actual operating conditions: Especially the flow rate and temperature should be set as the test station

The most unfavorable value considered: "(See 9:2);

This section has made the following editorial changes:

--- Correct the "see 9:3:4:1" in the "intermittent DC current test" column item b) to "see 9:3:4:2" (see 9:3:6, IEC 60700-1:

9:3:6 in:2015):

---Incorporated the content of IEC 60700-1:2015/Cor1:2017 errata:

This part was proposed by China Electrical Equipment Industry Association:

This part is under the jurisdiction of the National Power Electronic System and Equipment Standardization Technical Committee (SAC/TC60):

Drafting organizations of this section: China Electric Power Research Institute Co:, Ltd:, Xi'an High Voltage Apparatus Research Institute Co:, Ltd:, Xi'an Xidian Power

Power Systems Co:, Ltd:, State Grid Sichuan Electric Power Research Institute, Global Energy Internet Research Institute Co:, Ltd:, State Grid Shanghai

Electric Power Research Institute, Xi'an Power Electronics Technology Research Institute, Nanjing Nanrui Relay Electric Co:, Ltd:, China Southern Power Grid

Research Institute Co:, Ltd:, China Southern Power Grid Co:, Ltd: EHV Transmission Company, Xu Ji Electric Co:, Ltd:, State Grid Economic Technology

Research Institute Co:, Ltd:, State Grid Anhui Electric Power Co:, Ltd: Electric Power Research Institute:

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: