Core Points - The "Ningdian Ruxiang" project is China's first approved "Shagao Desert" renewable energy transmission project, capable of delivering over 36 billion kilowatt-hours of electricity annually from Ningxia to Hunan, meeting the annual electricity needs of over 10 million households [1][2] - This project is part of China's strategy to accelerate the construction of a new energy system and enhance the capacity for "West-to-East" electricity transmission [1][2] Group 1: Project Overview - The "Ningdian Ruxiang" project is a ±800 kV UHVDC transmission line spanning 1616 kilometers, with a transmission capacity of 8 million kilowatts [2][3] - It is a key project in the "14th Five-Year" electricity development plan, contributing to a comprehensive UHV transmission network in China, with total investments exceeding 380 billion yuan and 19 UHV projects under construction [2][3] Group 2: Technical Aspects - UHV transmission lines have significant advantages, including three times the capacity of ordinary lines, long-distance transmission capabilities, and lower loss rates of approximately 4% to 5% [3][4] - The project faces design and construction challenges due to diverse geographical conditions, requiring tailored solutions for seismic zones, weak soil areas, and river crossings [4][5] Group 3: Equipment and Automation - All equipment for the project is domestically manufactured, including high-end converter transformers, which are crucial for the UHV system [5][6] - The project utilizes advanced automation and intelligent monitoring systems to ensure efficient operation and real-time adjustments based on grid demands [7][8] Group 4: Environmental Considerations - The project emphasizes green energy, with over 70% of the installed capacity coming from renewable sources, including 4 million kilowatts of wind power and 9 million kilowatts of solar power [8][9] - Measures are in place to mitigate environmental impacts, including wastewater treatment and noise reduction strategies, ensuring compliance with ecological standards [9][10] Group 5: Operational Impact - The project has already demonstrated its capability during peak electricity demand periods, with a trial operation achieving a delivery capacity of 4 million kilowatts [10] - Once fully operational, the project will provide 1/6 of Hunan's electricity needs, significantly enhancing the region's power supply stability [10]

Core Viewpoint - The "Ningdian Ruxiang" project is China's first approved "desert and Gobi" renewable energy transmission project, which will deliver over 36 billion kilowatt-hours of electricity annually from Ningxia to Hunan, meeting the annual electricity needs of over 10 million households [6][17]. Group 1: Project Overview - The "Ningdian Ruxiang" project is a ±800 kV UHVDC transmission line that spans 1616 kilometers, connecting Ningxia with Hunan and crossing multiple provinces [8][9]. - The project is a key initiative under China's 14th Five-Year Plan for power development, with a total investment exceeding 380 billion yuan for UHV projects [8][9]. - The project aims to enhance the capacity for "West-to-East" electricity transmission and optimize the allocation of clean energy resources [6][8]. Group 2: Technical Aspects - The UHVDC transmission line has a capacity of 8 million kilowatts and a transmission loss rate of approximately 4% to 5%, significantly lower than conventional transmission lines [9][10]. - The project involves overcoming various technical challenges, including diverse geological conditions and the need for customized solutions for different terrains [10][11]. - All equipment for the project is domestically manufactured, with advanced technologies implemented to enhance efficiency and reliability [11][12]. Group 3: Renewable Energy Integration - The project has an installed capacity of 17.64 million kilowatts, with 13 million kilowatts coming from renewable sources, including 4 million kilowatts from wind and 9 million kilowatts from solar energy [14]. - Over 50% of the electricity transmitted to Hunan will be from renewable sources, contributing to a reduction of 16 million tons of carbon dioxide emissions annually [14][15]. - The integration of renewable energy faces challenges due to the variability of wind and solar output, necessitating the use of traditional power sources for balancing [15]. Group 4: Environmental Considerations - The project incorporates measures to minimize environmental impact, including wastewater treatment and noise reduction strategies [16]. - Construction has been carefully planned to avoid sensitive ecological areas and water source protection zones, with a focus on ecological restoration [16][17]. - The project has successfully passed the summer peak electricity demand test, demonstrating its capability to provide stable power supply during high-demand periods [17].

Core Viewpoint - The Ningxia to Hunan ±800 kV UHVDC transmission project, known as "Ningdian Ruxiang," has been fully commissioned, with a maximum transmission capacity of 8 million kW, capable of delivering 36 to 40 billion kWh of electricity annually to Hunan [1] Group 1: Project Overview - The project spans 1,616 kilometers, starting from Zhongning Converter Station in Ningxia and passing through Gansu, Shaanxi, Chongqing, and Hubei before reaching Hengyang Converter Station in Hunan, with a total investment of 28.1 billion yuan [1] - The project faced significant challenges due to its long distance and complex geographical environment [1] Group 2: Key Equipment - High-end converter transformers, regarded as the "heart" of UHVDC projects, play a crucial role in the conversion of AC to DC and in voltage and power regulation [1] - The Hengyang Converter Station features 14 high-end converter transformers independently designed and manufactured by TBEA, marking a significant achievement in domestic production capabilities [1] Group 3: Technological Advancements - TBEA enhanced the manufacturing precision and reliability of the transformers by reducing the number of welding points from over 450 to 42, improving reliability by tenfold and significantly increasing short-circuit resistance [2] - The transformers were designed to maintain a temperature rise below 35K, compared to the industry average of 40K, thereby extending their operational lifespan [2] Group 4: Supporting Infrastructure - The Zhongning Converter Station was custom-designed with earthquake-resistant epoxy resin impregnated paper capacitive DC bushings to ensure safe operation in a seismically active area [3] - TBEA upgraded traditional manufacturing processes to high-precision CNC plasma cutting systems to meet the high stability requirements for transformer oil tanks [3] - Innovative steel core aluminum stranded wire products were developed using an intelligent production system, enhancing production efficiency and ensuring high-quality conductors with micron-level precision [3]

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].