T/GSEE 0009-2023 High-voltage Direct Current (HVD) hybrid multi-terminal DC transmission engineering for switching station equipment quality control technical guidelines

Scope

Scope: This document specifies the quality control requirements for the main equipment of ultra-high voltage hybrid multi-terminal DC transmission stations during the manufacturing process, and provides guidance on equipment quality control activities (including extended supervision, special quality control activities, spot checks, inspections, and remote supervision). This document applies to the quality control of major equipment for ultra-high voltage hybrid multi-terminal DC transmission stations, including: converter transformers, coupling transformers, converter valves and valve cooling systems, dry reactors, control and protection equipment, switchgear, and other equipment. The quality control of other equipment shall refer to the current relevant standards for implementation. Main technical content: This standard consists of 6 chapters, including: (1) Scope: This document specifies the quality control requirements for the main equipment of ultra-high voltage hybrid multi-terminal DC transmission stations during the manufacturing process, and provides guidance on equipment quality control activities (including extended supervision, special quality control activities, spot checks, inspections, and remote supervision). This document applies to the quality control of major equipment for ultra-high voltage hybrid multi-terminal DC transmission stations, including: converter transformers, coupling transformers, converter valves and valve cooling systems, dry reactors, control and protection equipment, switchgear, and other equipment. (2) Normative references: This standard references 10 national standards and industry standards. (3) Terms and definitions: This section defines the terms and concepts referenced in the standard. (4) General provisions: This section clarifies the purpose and working methods of quality control. (5) Implementation of quality control: This section specifies the preparation and implementation points and methods of quality co

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