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

Scope

This document is applicable to system tests for high-voltage direct current (HVDC) facilities where the sending end and receiving end are respectively connected to the AC system.
The tests specified in this document are based on bidirectional single-pole and bidirectional double-pole HVDC systems composed of the sending end and receiving end respectively connected to the AC system. The test requirements and acceptance criteria are also applicable to back-to-back systems, while the test requirements and acceptance criteria for multi-terminal systems and voltage-source converter systems are not included in this document. In addition to bidirectional tests, this document is applicable to single-pole HVDC systems.
For special functions or performance requirements of specific engineering projects, it is recommended to add additional test items not included in this document according to the requirements of technical specifications.
This document is solely intended as a system test guide for HVDC facilities, providing guidance on how to develop a commissioning plan. The tests described in this document may not necessarily apply to all engineering projects, but they represent a possible range of tests that should be considered.
Therefore, it is recommended that project developers prioritize the development of separate test plans in accordance with this document and clarify the responsibilities of various participating units (such as users, suppliers, manufacturers, operators, and purchasers) for various tasks/tests in advance.

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