来源：光明日报 青藏高原的雪山融水化作清洁电能，仅需9毫秒便能跨越2681公里，点亮粤港澳大湾区的万家灯火—— 这一看似科幻的场景，即将通过藏粤直流工程成为现实。 "这是我国首个跨越如此复杂地形的特高压工程。"中国南方电网有限责任公司工程建设部副总经理董言 乐表示，"我们面临的是超高海拔、雪山冻土、地质灾害、大件运输和环境保护等世界级难题。" 这条全长2681公里的"电力天路"，需要跨越青藏高原、云贵高原和华南丘陵三级地理阶梯，全线近90% 为山地、30%为高山大岭，海拔最高处达5300米。面对如此挑战，藏粤直流作为目前世界上输电能力最 强、技术水平最先进、投资规模最大的柔性直流输电工程，正在创造电力建设史上的多项"世界第一"。 而这背后，是科研工作者们长达数年的攻坚战。 "以前总觉得宇宙射线离我们很远，直到拿到西藏的环境数据。"南网科研院团队骨干杨柳说，为了找到 答案，团队把功率器件送到了东莞中国散裂中子源——这个能加速中子束的国家大科学装置，可以在几 小时内模拟器件在高海拔几十年的辐射量，快速验证功率器件在高海拔环境中的可靠性。 最终，他们不仅找到了器件的"安全电压阈值"，还给出了降低失效率的措施——这意 ...

Core Viewpoint - The company, Hunan Hualian Ceramics Co., Ltd., is experiencing growth in its business segments, particularly in dental materials and cross-border e-commerce, benefiting from currency depreciation and strong overseas revenue. Group 1: Company Performance - The company's stock price increased by 1.86% on September 22, with a trading volume of 224 million yuan and a market capitalization of 4.148 billion yuan [1] - For the first half of 2025, the company reported a revenue of 726 million yuan, representing a year-on-year growth of 25.10%, and a net profit attributable to shareholders of 120 million yuan, up 21.63% year-on-year [7] - Cumulative cash dividends since the company's A-share listing amount to 272 million yuan, with 219 million yuan distributed over the past three years [8] Group 2: Business Segments - The company produces zirconia, a key material for dental products, and has indicated involvement in cross-border e-commerce [2] - Its subsidiary, Hualian Torch, manufactures electrical porcelain products primarily for high and ultra-high voltage applications, serving clients such as the State Grid [3] - The subsidiary's products, including insulators and wall bushings, are utilized in flexible direct current transmission systems, with supply contracts to major clients like the State Grid and Southern Grid [4] Group 3: Market Dynamics - The company benefits from a significant overseas revenue share, accounting for 71.06% of total revenue, aided by the depreciation of the yuan [5] - The stock has seen a net inflow of 23.72 million yuan from major investors, indicating a positive trend in investor sentiment [6] - The average trading cost of the stock is 15.28 yuan, with the current price approaching a resistance level of 16.55 yuan, suggesting potential for upward movement if the resistance is broken [6]

Core Viewpoint - The construction of the Zang-Guangdong DC project marks a historic achievement in power transmission, being the world's largest flexible DC transmission project, aimed at transporting clean energy from Tibet to Guangdong [1][4][8]. Project Overview - The Zang-Guangdong DC project spans over 2,600 kilometers, crossing various geographical terrains including the Qinghai-Tibet Plateau and the Yunnan-Guangxi region, with a planned capacity to transmit 43 billion kilowatt-hours of clean energy annually [1][8]. - The project is expected to enhance the renewable energy consumption responsibility weight in Guangdong by 3.8 percentage points and increase power supply capacity by 5 million kilowatts for major cities like Guangzhou and Shenzhen [8]. Technical Challenges and Innovations - The project faces significant technical challenges due to its vast scale and complex environmental conditions, necessitating extensive research and development in high-altitude power transmission technologies [4][11]. - A new energy self-balancing flexible DC converter topology has been developed, which allows for efficient management of surplus energy during grid faults, ensuring system safety and stability [12][13]. Research and Development Efforts - The project has involved rigorous field investigations and data collection, with over 15,000 original data points gathered to support construction planning and environmental assessments [2][3]. - Research teams have conducted numerous high-altitude experiments to understand the electrical behavior in extreme conditions, leading to breakthroughs in high-altitude discharge testing and neutron radiation effects on power devices [5][6]. Strategic Importance - The Zang-Guangdong DC project is pivotal for optimizing national energy resource allocation and enhancing regional economic development, facilitating the transfer of clean energy from the resource-rich west to the economically vibrant east [8][9]. - The project also represents a significant collaboration between major power grid companies in China, aiming for mutual benefits and resource optimization [9][10].

Core Viewpoint - The construction of the Zang-Guangdong DC project has officially begun, marking a significant step in transmitting clean energy from Tibet to the Guangdong region, enhancing energy supply and supporting green development initiatives in China [1][11][20]. Group 1: Project Overview - The Zang-Guangdong DC project is China's first ultra-high voltage project that crosses the Qinghai-Tibet Plateau, Yunnan-Guizhou Plateau, and South China hills, spanning over 2,600 kilometers [1][5]. - The project will consist of over 4,300 towers, with the first segment in Yunnan facing significant geographical challenges, including high altitudes and harsh weather conditions [4][16]. - Once completed, the project is expected to deliver 43 billion kilowatt-hours of clean energy annually, increasing the renewable energy consumption responsibility in Guangdong by 3.8 percentage points [16][18]. Group 2: Technological Innovations - The Zang-Guangdong DC project will set multiple world records, being the strongest, most advanced, and largest investment flexible DC transmission project globally [5][10]. - The project has successfully overcome key technical challenges in areas such as direct current equipment manufacturing, insulation, and electromagnetic environment, achieving breakthroughs in multi-terminal flexible DC fault crossing [10][20]. - Research teams have conducted extensive high-altitude testing to gather critical data for the design and operation of power devices in extreme conditions, ensuring reliability in high-altitude environments [7][8][10]. Group 3: Economic and Environmental Impact - The project aims to optimize the national productivity layout and promote regional coordinated development by facilitating the transfer of clean energy from the resource-rich western regions to economically vibrant areas like the Guangdong-Hong Kong-Macao Greater Bay Area [11][13][20]. - The Zang-Guangdong DC project is expected to play a crucial role in establishing a new energy system in China, supporting the country's dual carbon goals and enhancing energy security [20][21].

Core Viewpoint - The construction of the Tibet-Guangdong Direct Current Project, a key cross-provincial power transmission project under China's 14th Five-Year Plan, has commenced, aiming to deliver clean energy from Tibet to the Guangdong-Hong Kong-Macao Greater Bay Area, with a total transmission capacity of over 43 billion kilowatt-hours annually after full operation in 2029, equivalent to half of the annual output of the Three Gorges Dam [2][5]. Group 1 - The Tibet-Guangdong Direct Current Project starts in southeastern Tibet and traverses Yunnan and Guangxi, covering approximately 2,681 kilometers, with four converter stations built in Tibet and Guangdong [1][4]. - The project utilizes advanced "Ultra-High Voltage Multi-Terminal Flexible Direct Current" technology to manage the instability of renewable energy generation, ensuring a stable power supply with minimal disruption to the grid, allowing for the transmission of green electricity from Tibet to Guangdong in just 9 milliseconds [7]. - The renewable energy installed capacity at the starting point in southeastern Tibet reaches 10 million kilowatts, highlighting the region's potential for clean energy generation [4].

Core Viewpoint - The recent data indicates a positive trend in the A-share market, with significant net inflows of capital into various concept sectors, particularly in Xinjiang revitalization, commercial aerospace, and mixed reality [1] Group 1: Market Performance - The Shanghai Composite Index increased by 0.48% over the past three days [1] - The trading volume in A-shares rose by 12.50% compared to the previous three days [1] Group 2: Capital Inflows - A total of 28 concept sectors experienced substantial net inflows of capital in the last three days [1] - The top three sectors with the highest net capital inflows were: - Xinjiang revitalization: net inflow of 1.359 billion yuan [1] - Commercial aerospace: net inflow of 1.348 billion yuan [1] - Mixed reality: net inflow of 1.036 billion yuan [1] Group 3: Sector Performance - The performance of the top sectors based on net inflows included: - Xinjiang revitalization: increased by 3.89% [1] - Commercial aerospace: increased by 2.40% [1] - Mixed reality: increased by 1.28% [1] - Other notable sectors with positive performance included flexible DC transmission, Apple concept, and nickel metal, each showing gains [1]

Group 1 - The military equipment restructuring concept has declined by 4.64%, ranking among the top declines in the concept sector, with companies like Changcheng Military Industry, Huachuang Technology, and Zhongguang Optical leading the declines [1] - The military equipment restructuring concept experienced a net outflow of 1.041 billion yuan in main funds today, with six stocks seeing net outflows, and five stocks having outflows exceeding 30 million yuan [2] - The stock with the highest net outflow is Changcheng Military Industry, which saw a net outflow of 791 million yuan, followed by Chang'an Automobile, Huachuang Technology, and Hunan Tianyan with net outflows of 111 million yuan, 56.65 million yuan, and 49.12 million yuan respectively [2] Group 2 - The top decliners in the military equipment restructuring concept include Changcheng Military Industry with a decline of 7.86%, Huachuang Technology with a decline of 6.58%, and Zhongguang Optical with a decline of 6.08% [2] - The trading volume for Changcheng Military Industry was 15.52%, while the trading volume for Huachuang Technology was 3.27% [2] - The only stock in the military equipment restructuring concept that saw a positive net fund flow was Jianshe Industrial, with a net inflow of 33.09 million yuan [2]

Group 1 - The high-pressure oxygen chamber concept increased by 1.55%, ranking second among concept sectors, with three stocks rising, including a 20% limit up for Tiebian Heavy Industry [1] - The leading gainers in the high-pressure oxygen chamber sector were International Medicine and Yinkang Life, which rose by 0.93% and 0.20% respectively [1] - The sector saw a net inflow of 0.50 billion yuan from main funds, with Tiebian Heavy Industry receiving the highest net inflow of 1.03 billion yuan [2][3] Group 2 - The main fund inflow ratios for Tiebian Heavy Industry, International Medicine, and Jinling Pharmaceutical were 29.36%, 10.10%, and 5.54% respectively [3] - The trading performance of stocks in the high-pressure oxygen chamber sector showed varied results, with Tiebian Heavy Industry leading in both price increase and fund inflow [3][4] - Stocks such as Weiao and Innovation Medical experienced significant declines, with net outflows of -3214.35 million yuan and -4427.60 million yuan respectively [4]

Group 1 - The flexible DC transmission concept increased by 2.00%, ranking 9th among concept sectors, with 41 stocks rising, including Aotexun hitting the limit up, Tongguang Cable, and Baobian Electric rising by 9.90%, 8.68%, and 6.99% respectively [1] - The concept sector saw a net inflow of 406 million yuan, with 26 stocks receiving net inflows, and 6 stocks exceeding 50 million yuan in net inflow, led by Baobian Electric with a net inflow of 127 million yuan [2][3] - Aotexun, China West Electric, and Far East Holdings had the highest net inflow ratios at 29.79%, 12.95%, and 11.62% respectively [3] Group 2 - The top gainers in the flexible DC transmission sector included Baobian Electric with an 8.68% increase and Aotexun with a 9.99% increase, while the biggest losers included Dadongnan with a 6.11% decrease [1][5] - The trading volume and turnover rates for key stocks in the sector were significant, with Aotexun showing a turnover rate of 9.54% and Baobian Electric at 8.26% [3][4] - The overall market sentiment for the flexible DC transmission sector appears positive, with substantial capital inflow and several stocks performing well [2][6]

Group 1 - The China Photovoltaic Industry Index (931151) has seen a strong increase of 1.54%, with key stocks such as Aiko Solar (600732) rising by 4.67% and Daqo New Energy (688303) by 4.06% [1] - The Lagoinha photovoltaic project in Brazil, built by China General Nuclear Power Corporation, has achieved full capacity operation, expected to generate approximately 400 million kWh annually, meeting the electricity needs of around 240,000 local households [1] - Domestic terminal demand is weak following the end of the 531 rush, leading to a slight decrease in production, with main chain prices dropping to cash cost levels, indicating a potential opportunity for supply-side reform [2] Group 2 - The top ten weighted stocks in the China Photovoltaic Industry Index account for 56.2% of the index, including Longi Green Energy (601012) and Tongwei Co., Ltd. (600438) [3] - The photovoltaic ETF fund closely tracks the China Photovoltaic Industry Index, which selects up to 50 representative listed companies in the photovoltaic industry chain [2][4] - Global photovoltaic installation growth rates have been revised to 15% for this year and 5% for next year, driven by strong demand in Europe and emerging markets [2]