GB/T 26216.1-2019DC current measuring device for HVDC transmission system—Part 1: Electronic 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 first 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 26216.1-2010 "DC current measurement devices for high-voltage DC transmission systems. Part 1. Electronic DC Compared with GB/T 26216.1-2010, the main technical changes are as follows.

--- "800" was changed to "1100", "flexible DC transmission system charging circuit and bridge arm circuit" was added to the typical layout position (see (Chapter 1, Chapter 1 of the 2010 edition);

--- Added "In the case of a digital interface, the electronic DC current measurement device is configured with a merge unit to complete this function." (See 3.2);

--- Modify 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 "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);

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

--- Respecified the current error value in Table 2 (see 5.7, 5.9 in the 2010 version);

--- Modify "2D41H" to "3A98H (decimal 15000)" and "0CCCH" to "1388H (decimal 5000) (see 5.13, 5.11 of 2010) ";

--- Increased the "sampling rate" (see 6.1);

--- Deleted the "cut-off frequency" and moved it to Chapter 6 (see 6.2, 2010 version 5.7);

--- Adjusted the "maximum attenuation of fiber optic transmission" and moved it to Chapter 6 (see 6.3, 5.10 of the 2010 edition);

--- Removed the "nameplate logo" (see 6.3 of the 2010 version);

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

--- Added "Combination unit output signal transmission protocol is about TDM, GB/T 20840.8-2007, GB/T 20840.9-2017 may Select "(see 6.6);

--- Deleted "Insulator is composite type, optical fiber is enclosed in it.", "Probe box, composite insulator" was modified to "Optical fiber fusion box, optical Fiber composite insulators "(see 6.10, 6.9 of the 2010 edition);

--- Modify the content of the merging unit to "When the DC current measuring device outputs digital signals, the number of merging units is The number of secondary converters is configured. "(See 6.11, 6.11 of 2010);

--- Modified "error measurement" to "accuracy test" and added "n) temperature cycle test" (see 7.3.1, 7.3 of the 2010 edition);

--- Modify "Ur < 200" to "Udm < 300" and "Ur>=200" to "Udm>=300" (see 7.3.4, 7.3.3 of the 2010 version);

--- Modify "positive polarity DC voltage" to "negative polarity DC voltage" (see 7.3.6, 7.3.5 of the 2010 edition);

--- Added "For DC measurement devices using shunts, the product can be verified by applying a measurement voltage to a primary converter High current measurement performance, "(see 7.3.10);

--- Modify the rise time "400µs" of step response to "250µs" and add "< 100µs (for flexible DC transmission systems)" (See 7.3.11, 2010 version 5.8);

--- Deleted the "frequency response" and used its content as the criterion for the frequency response test (see 7.3.12, 2010 version 5.6);

--- Modify "0.75% (the benchmark is Ir)" to "3%" (see 7.3.12, 2010 version 5.6);

--- Modify "100A" to "5% Ir" (see 7.3.12, 7.3.11 of the 2010 version);

--- Modify d) "Partial discharge measurement" to "d) DC withstand voltage test and partial discharge measurement" (see 7.4.1, 2010 version 7.4);

--- "Partial discharge measurement" was modified to "DC withstand voltage test and partial discharge measurement" Partial discharge measurement. During the test, the pre-voltage was 1.225Ur, and the partial discharge amount did not exceed 50pC. The partial discharge measurement voltage was 1.5Ur/2, partial discharge does not exceed 20pC. Refer to GB/T 7354 for partial discharge measurement. "(See 7.4.5, 2010 edition 7.4.4);

--- Increased criteria for step response tests (see 7.4.6, 7.4.5 of the 2010 version);

--- "For electronic output current measuring devices with digital output, Routine test. "Amended to" can be applied to 0.1pu, 0.2pu, 1.0pu, 1.2pu DC at room temperature in accordance with 7.3.10 Flow to measure accuracy, meeting the requirements of 5.7. "(See 7.4.8, 7.4.7 of the 2010 edition);

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

--- Removed Appendix A of the 2010 edition.

1 Scope

This part of GB/T 26216 specifies the requirements for electronic DC current measurement 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 electronic DC current measurement devices installed in DC power transmission systems with voltage levels of ± 1100kV and below.Typical Placement locations are DC pole busbars, midpoints of the double twelve pulsation converter valve group (if applicable) busbars, neutral busbars, ground electrode leads, flexible DC output Electric system charging circuit and bridge arm circuit.

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 2423.3 Environmental test Part 2: Test method Test Cab. Constant humidity test

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 11022-2011 Common technical requirements for high-voltage switchgear and control equipment standards

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

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

GB/T 20840.9-2017 Transformers Part 9: Digital Interface for Transformers

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

3 Terms and definitions

GB/T 2900.50, GB/T 2900.57, GB/T 2900.95 and GB/T 20840.8-2007 as well as the following terms and definitions The meaning applies to this document. For ease of use, the following lists some of the terms and definitions in GB/T 20840.8-2007.