Successful Practice of Domestic Application of Grain-Oriented Silicon Steel as Core Material for Ultra-High Voltage Transformer Supported by High Quality Standards
High grade grain-oriented(GO)silicon steel,as a key basic material,has been included in the catalog of the"Made in China 2025 Strategy".It is a key development direction to achieve independent support for important power equipment such as ultra-high voltage direct current(UHVDC)converter transformers in China,and avoid being controlled by others.GO steel for UHVDC transformers in China was once monopolized by a few multinational companies such as Nippon Steel and POSCO for a long time,and lacking of standard was one of the key technical bottlenecks restricting the localization.This paper introduces the research process,innovative content,engineering practice,and application of an enterprise standard of State Grid Corporation of China on GO silicon steel.Since the implementation of this standard,domestic GO steel has been applied in 532 converter transformers of 13 UHVDC projects,including±800kV Baihetan Zhejiang and±1100kV Zhundong Wannan.The localization rate has now reached 100%,completely solving the bottleneck problem of high-grade GO steel.This has become a typical case of leading the application of domestic materials in key power equipment with high-quality standards.
国家科技期刊平台
NSTL
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