GB/T 30423-2025High-voltage direct current (HVDC) installations - System tests (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents".

Drafting.

This document replaces GB/T 30423-2013 "System Testing of High Voltage Direct Current Facilities". Compared with GB/T 30423-2013, except for the structure...

Aside from adjustments and editorial changes, the main technical changes are as follows.

---The term "field test" has been added (see 3.1.4);

---The suspended section in section 3.2 has been deleted. "In a DC system, there are five operating states. grounded, out of service/isolated, standby, blocked, and deactivated." Lock. (See 3.2 in the 2013 edition);

---Added description of acceptance testing (see 4.1);

---A description of unipolar/bipolar DC systems has been added (see 4.2);

---Figure 2 has been modified (see 4.2, 2013 version 4.2);

---The description of charging phenomena of AC filters and converter transformers has been deleted. Some requirements for acceptance testing during the on-site commissioning phase have been removed (see...).

(4.4 of the 2013 edition)

---Added functional descriptions for off-site simulation software and real-time simulators (see 4.6.1);

---Acceptance testing requirements have been added (see 4.7);

---Change "charging" to "charged" (see Chapter 5, Chapter 5 of the 2013 edition);

---The requirements for applying voltage when the voltage is applied to a low-voltage energized system have been changed (see 5.2.3.1, 2013 version 5.2.3.1);

---Added some objectives and requirements for open-circuit testing (see 5.7.1);

---The test procedure for the DC field open-circuit test has been modified (see 5.7.3.1, 2013 version 5.7.3.1);

---The order of the test procedures for DC transmission circuit testing has been changed (see 5.7.3.2, 2013 version 5.7.3.2);

---Figure 5 has been modified (see 6.1.1.1, 2013 version 6.1.1.1);

---The start-up and shutdown sequence at minimum power and the pre-test conditions for steady-state operation have been modified (see 6.1.2.3, 2013 version of 6.1.2.3);

---The test procedure for changing the protection interlocking and tripping sequence has been revised (see 6.1.3.4, 2013 version of 6.1.3.4);

---The test procedure for tap changer control has been modified (see 6.1.5.4, 2013 version 6.1.5.4);

---The test criteria for tap changer control tests have been modified (see 6.1.5.5, 2013 version 6.1.5.5);

---The test procedure for control function switching has been modified (see 6.2.3.4, 2013 version 6.2.3.4);

---The description of the test objective for reactive power control mode switching has been revised (see 6.2.4.2, 2013 version 6.2.4.2);

---The test procedure for reactive power control mode switching has been modified (see 6.2.4.4, 2013 version 6.2.4.4);

---The test procedures for rated to buck conversion operation have been modified (see 6.2.5.4, 2013 version of 6.2.5.4);

---The statement "This test is only applicable to two-end systems and back-to-back HVDC systems" has been removed (see 6.4.1.1 in the 2013 version).

---The pre-test conditions for switching on the main circuit equipment have been changed (see 6.4.1.2, 2013 version of 6.4.1.2);

---The test procedure for the inverter current controller has been modified (see 6.5.2.4.5, the 2013 version of 6.5.2.4.5);

---The experimental objectives for the interaction/control of AC systems have been changed (see 6.5.5.2, 2013 version 6.5.5.2);

---Change "full load" to "load agreed upon with the utility company" (see 6.7.2.4, 2013 version of 6.7.2.4);

---The test acceptance criteria for trial operation have been changed (see 7.5, 2013 version 7.5);

---The "deviation report" has been modified and moved to the "system test results file" (see 8.7.3, 8.8 in the 2013 version).

This document adopts IEC 61975:2022 "Testing of high voltage direct current facilities systems".

The following minimal editorial changes have been made to this document.

---Added "Note" (see 3.1.1, 3.1.2, 4.6.2, 5.1.3, 5.6.4.2, 5.6.4.3, 5.7.2.1, 6.6.1.5.2) and "Note 2" (see 3.2.1~) 3.2.5);

---The "Note" under section 3.2 and the "Out of Service Status" in the "Note" of section 3.2.4 have been removed;

---Since both are bipolar topologies, the wiring method in Figure 4 is changed to be the same as that in Figure 2 to maintain consistency;

---Change the clauses to list items (see 5.5.2, 6.4.1.2, 6.4.4.4 and 6.6.1.4.4);

---The description of the test procedure for the inverter current controller test has been corrected (see 6.5.2.4.5);

---The test procedure for the inverter current controller has been corrected (see 6.5.2.4.5);

---The heading "Test Objective" is corrected to "Acceptance Criteria" (see 6.8.1.3).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Power Electronic Systems and Equipment (SAC/TC60).

1 Scope

This document applies to system testing of high-voltage direct current (HVDC) facilities where the sending and receiving ends are respectively connected to an AC system.

The tests specified in this document are based on bidirectional unipolar and bidirectional bipolar HVDC systems consisting of a sender and a receiver connected to an AC system, respectively.

The test requirements and acceptance criteria also apply to back-to-back systems, while the test requirements and acceptance criteria for multi-terminal systems and systems using voltage source converters also apply.

Acceptance criteria are not included in this document. Except for bipolar testing, this document applies to unipolar HVDC systems.

For specific engineering projects requiring special functions or performance, additional tests not included in this document should be added according to the technical specifications.

project.

This document serves only as a system testing guide for HVDC facilities, instructing users on how to develop commissioning plans. The tests described in this document do not...

It is certainly applicable to all engineering projects, but it represents the possible range of tests that should be considered.

Therefore, it is recommended that project owners prioritize developing separate test plans in accordance with this document and clearly define the roles of each participating unit in advance (e.g., for example, the responsibilities of various tasks/trials among users, suppliers, manufacturers, operators, and purchasers.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

Vocabulary

Note. GB/T 13498-2017 High Voltage Direct Current Transmission Terminology (IEC 60633:2015, MOD)

3 Terms and Definitions

The terms and definitions defined in IEC 60633:2019 and the following terms and definitions apply to this document.