Core Viewpoint - The construction of the Ningxia-Hunan ±800 kV UHVDC transmission project represents a significant advancement in China's UHV industry, showcasing the country's technological leadership and innovation in high-capacity power transmission [3][4][10]. Group 1: Project Overview - The Ningxia-Hunan UHVDC project spans 1634 kilometers, connecting a renewable energy base with a total installed capacity of 17,640 MW to Hunan Province, which has a population of 66.04 million [2][4]. - Upon successful operation, the project is expected to deliver at least 36 billion kilowatt-hours of electricity annually [4]. Group 2: Technological Achievements - The Hunan-based Hengbian Company has successfully manufactured 14 high-end converter transformers, which are critical for UHVDC projects, achieving a one-time pass rate in testing [5][10]. - The precision required for these transformers is extremely high, with insulation paper thickness tolerances of ±0.5 mm and assembly errors of less than 1 mm [5][11]. Group 3: Industry Leadership - The Heng-Chang-Zhu-Tan UHV transmission equipment industrial cluster has evolved from following international standards to leading in the field, with 27 out of 31 operational UHV lines in China utilizing equipment from this cluster [7][8]. - The cluster's annual output value exceeds 220 billion yuan, and it is projected to account for over 25% of the national total by 2024 [7][8]. Group 4: Future Goals - The cluster aims to create a world-class UHV transmission equipment industrial cluster, with expected total revenue of 270 billion yuan by 2026 and over 400 billion yuan by 2030 [10][12]. - Key focuses for future development include enhancing equipment safety and efficiency, as well as increasing capabilities in smart manufacturing and original technology development [10][11].