T/GSEE 0010-2023 Active

Scope: This document specifies the principles and structure of fiber-optic DC current transformers (hereinafter referred to as transformers), their normal and special operating conditions, technical parameters and performance requirements, testing, marking, packaging, storage, and transportation. This document applies to fiber-optic current transformers installed in DC transmission circuits with voltage levels of ±800 kV and below, and currents ranging from 100A to 6300A, including the DC pole buses, the neutral buses, and the midpoints of dual twelve-pulse converter valve groups (if applicable). Main technical content: This standard consists of 8 chapters, including: (1) Scope - This standard applies to fiber-optic current transformers installed in DC transmission systems with voltage levels of ±800 kV and below, including the DC pole buses, the neutral buses, and the midpoints of dual twelve-pulse converter valve groups (if applicable). This standard specifies the operating conditions and technical requirements for fiber-optic DC current transformers used in DC transmission systems with voltage levels of ±800 kV and below. (2) Normative references - This standard references 28 national standards, industry standards, and international standards. (3) Terms and definitions (4) Principle and structure of current transformers (5) Normal and special operating conditions (6) Technical parameters and performance requirements (7) Testing (8) Marking, packaging, storage, and transportation. V. Verification of Quality Evaluation Results This draft standard relies on the Guangdong Key R&D Project "Development of Key Technologies and Testing Systems for High-Voltage DC Switchgear in Smart Grids". The technical requirements are mainly based on the internal technical requirements of the main participating units of the project, including the Guangdong Product Quality Supervision and Inspection Research Institute, Guangdong Zhongbei Energy Technology Co., Ltd., and Guang'an