在"宁电入湘"工程的受端衡阳换流站，就有14台由国内企业特变电工自主研制生产的高端换流变压器， 这也是我国首批实现独立设计、独立采购、独立制造的高端换流变压器。 据介绍，在研制过程中，特变电工从制造精度、安装标准及环境适应性等20多个方面对产品进行了技术 提升。将网线圈焊点从传统的450多个减至42个，焊点操作可靠性提升10倍，使得最终设备结构更紧 实，抗短路能力大幅增强。通过铜磁复合屏蔽、油路优化等技术实现低损耗设计，将行业平均40K的温 升控制在了35K以内，极大地延长了设备使用寿命。 中新网北京8月20日电 (记者 王梦瑶)8月20日，宁夏至湖南±800千伏特高压直流输电工程(以下简称"宁电 入湘"工程)全面投产送电。该工程额定最大送电能力800万千瓦，每年可向湖南输送电量360亿至400亿 千瓦时，"超级工程"的安全运行离不开背后"超级装备"的硬核保障。 "宁电入湘"工程始于宁夏回族自治区中卫市中宁换流站，一路途经甘肃、陕西、重庆、湖北四地，最终 抵达湖南省衡阳市衡阳换流站，线路全长1616千米，总投资达281亿元。由于工程线路跨度大，且沿途 地理环境复杂多样，施工过程中面临着诸多严峻挑战。 高端换流 ...

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].