人民日报丨特高压架起电力“闪送通道” 中国已投运40余项特高压交直流工程

Core Viewpoint - China's ultra-high voltage (UHV) transmission projects are rapidly advancing, significantly enhancing the country's energy distribution capabilities and supporting the transition to cleaner energy sources [9][14][17]. Group 1: UHV Projects Overview - China has put into operation over 45 UHV projects, with an expected transmission capacity exceeding 340 million kilowatts by the end of this year, marking a 25% increase from the end of the 13th Five-Year Plan [9][14]. - The Ningxia-Hunan ±800 kV UHV DC transmission project is the first approved project primarily for transmitting renewable energy from large-scale wind and solar bases, capable of delivering over 36 billion kilowatt-hours annually to Hunan, with renewable energy accounting for over 50% [4][17]. - The Gansu-Zhejiang ±800 kV UHV DC project has entered the line construction phase, further expanding the UHV network [6]. Group 2: Energy Distribution and Demand - China's energy production and consumption are inversely distributed, necessitating the "West-East Power Transmission" strategy to efficiently transport energy from resource-rich western regions to consumption-heavy eastern areas [12][14]. - The UHV DC technology allows for long-distance transmission (2000 to 3000 kilometers) with low line losses, effectively connecting energy supply to high-demand regions [12][14]. Group 3: Technological Innovations - The UHV projects have led to significant technological advancements, including the establishment of standardized results for ±800 kV/800 MW UHV DC systems, with over 500 various standards and specifications developed [19][21]. - The Baihetan-Jiangsu ±800 kV UHV DC project is notable for being the first to utilize hybrid cascade transmission technology, integrating conventional and flexible DC transmission advantages [20][21]. - The introduction of domestically produced equipment, such as the tap changer and DC control systems, has broken foreign technology monopolies, enhancing China's electrical equipment manufacturing capabilities [21]. Group 4: Future Outlook - By 2024, the proportion of clean energy transmitted through UHV DC channels is expected to reach nearly 60%, with a total transmission of approximately 420 billion kilowatt-hours, reflecting a 70% increase from the end of the 13th Five-Year Plan [16][17]. - The construction of UHV projects is shifting from primarily coal-based power to prioritizing clean energy, significantly contributing to China's green energy transition [17].