GB/T 26216.2-2019DC current measuring device for HVDC transmission system—Part 2: Electromagnetic DC current measuring device (English PDF)

Foreword

GB/T 26216 "DC Current Measurement Device for HVDC Transmission System" is divided into two parts.

--- Part 1. Electronic DC current measuring device;

--- Part 2. Electromagnetic DC current measuring device.

This part is the second part of GB/T 26216.

This section is drafted in accordance with the rules given in GB/T 1.1-2009.

This section replaces GB/T 26216.2-2010 "DC current measurement devices for high-voltage DC transmission systems. Part 2. Electromagnetic DC". Compared with GB/T 26216.2-2010, the main technical changes are as follows.

--- Amend "800" to "1100", "± 800kV and below voltage level DC transmission system DC pole bus, double twelve pulsation switching Electromagnetic DC current measuring device for the midpoint (if applicable) busbar and neutral busbar of the flow valve group. "To" ± 1100kV and Electromagnetic DC current measurement devices for DC voltage transmission systems of the following voltage levels, typically arranged at neutral busbars and ground terminals Line etc. "(See Chapter 1, Chapter 1 of the 2010 edition);

--- Change the rated primary DC current value "600A, 3000A, 3125A, 4000A, 4500A." To "500A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A, 6300A." (see 5.1, 5.1 of the 2010 version);

--- Modify the title of the "overload DC current" to "overload current" (see 5.2, 5.2 of the 2010 version);

--- Modify "Rated Voltage" to "Rated Primary Voltage", where the values "408kV, 515kV, 680kV, 816kV" are modified "400kV, 500kV, 660kV, 800kV", and increase the value "1100kV" (see 5.4, 2010 version 5.4);

--- Increased the "maximum continuous operating voltage" see (5.5);

--- In Table 1, "rated voltage" was modified to "maximum continuous operating voltage" and the corresponding voltage value was modified. DC withstand voltage value in the table "1200" was changed to "1224" and "1122" and its corresponding value were added (see 5.6, 5.5 of the 2010 version);

--- Respecified the current error value in Table 2 (see 5.7, 5.8 of the 2010 version);

--- Deleted the "rated value of digital output" (see 5.9 in the 2010 version);

--- Removed the "nameplate logo" (see 6.4 of the 2010 version);

--- Deleted the "design requirements for digital output" (see 6.5 of the 2010 version);

--- "150 x 10^-6" was modified to "250", and "(including gas density relay, pressure indicator and temperature indicator)" was deleted (see 6.5, 6.7 of the 2010 version);

--- Deleted the "test group" and moved part of it into the type test project (see 7.3.2.1, 7.3.2 of the 2010 version);

--- Added "accuracy test, current step response test, frequency response test, dry heat test, high current test, Effect of high-frequency current on the interlock circuit, electromagnetic compatibility test "(see 7.3.2.1, 7.3.3 of the 2010 edition);

--- The content of the temperature rise test is modified to "The temperature rise test is carried out in accordance with 7.2.2 regulations and criteria of GB/T 20840.2-2014." (See 7.3.2.3, 7.3.3.2 of the 2010 version);

--- Modify "Ud < 200" to "Udm < 300" and "Ud>=200" to "Udm>=300" (see 7.3.2.4, 7.3.3.3 of the 2010 version);

--- Modify "positive DC voltage" to "negative DC voltage" (see 7.3.2.6, 7.3.3.5 of the 2010 version);

--- Deleted the "step response" and used its content as the criterion for the current step response test (see 7.3.2.12, 2010 version 5.7);

--- Deleted the "frequency response" and used its content as the criterion for the frequency response test (see 7.3.2.13, 2010 version 5.6);

--- Deleted the "test of electronic equipment" (see 7.3.4 of the 2010 version);

--- Deleted the "complementary type test of digital output" (see 7.3.4.8 of the 2010 version);

--- Modify "250 x 10^-6" to "250" and "66kV" to "60kV" (see 7.5.8, 7.5.7 of the 2010 version);

--- "Leak point for qualitative leak detection, quantitative leak detection if in doubt, annual leakage rate should be less than 0.5%." Amended to "SF6 gas absolute The method for checking the tightness of the edge DC current measuring device is performed in accordance with the regulations and criteria of GB/T 11023." (See 7.5.9, 2010 version 7.5.8);

--- Added "flags" (see Chapter 8);

--- Removed the Appendix A of the 2010 edition.

1 Scope

This part of GB/T 26216 specifies the specifications of electromagnetic DC current measuring devices for DC power transmission of voltage levels of ± 1100kV and below. Normal and special use conditions, ratings, design and construction, tests, etc.

This section applies to electromagnetic DC current measurement devices installed in DC power transmission systems with voltage levels of ± 1100kV and below. Typical The layout location is neutral bus, ground electrode lead, etc.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 311.1-2012 Insulation coordination Part 1: Definitions, principles and rules

GB/T 2423.2 Environmental tests for electric and electronic products. Part 2. Test methods Test B. High temperature

GB/T 2424.25 Environmental testing for electric and electronic products-Part 3: Test guidelines-Earthquake test methods

GB/T 2900.50 Electrical terminology General terminology for power generation, transmission and distribution

GB/T 2900.57 Electrical terminology for power generation, transmission and distribution operation

GB/T 2900.95 Electrical terminology transformers, voltage regulators and reactors

GB/T 7354 High Voltage Test Technology Partial Discharge Measurement

GB/T 11023 Sulfur hexafluoride gas seal test method for high voltage switchgear

GB/T 16927.1 High voltage test technology-Part 1: General definition and test requirements

GB/T 20840.1-2010 transformers Part 1: General technical requirements

GB/T 20840.2-2014 Transformers Part 2: Supplementary technical requirements for current transformers

GB/T 20840.8-2007 Current transformers Part 8: Electronic current transformers

GB/T 22071.1 Test Guide for Transformers Part 1: Current Transformers

GB/T 22707 Artificial pollution test for high-voltage insulators for DC systems

GB 50150-2016 electrical equipment installation engineering electrical equipment handover test standard

3 Terms and definitions

GB/T 2900.50, GB/T 2900.57, GB/T 2900.95 and GB/T 20840.1-2010 and the following terms and definitions The meaning applies to this document.