万里银线 强国脊梁——我国建成世界上规模最大、最复杂的输变电工程

Core Insights - China's electricity consumption is expected to exceed 10 trillion kilowatt-hours for the first time by 2025, surpassing the total consumption of the EU, Russia, India, and Japan combined for 2024 [1] - The country has built the world's largest and most advanced power transmission network, with a reliability rate of 99.924% [1] Group 1: Development of High Voltage Transmission - The capacity of China's ultra-high voltage (UHV) transmission has increased from 270 million kilowatts at the end of the 13th Five-Year Plan to 340 million kilowatts, a growth of over 25% [2] - The total length of UHV direct current lines has surpassed 40,000 kilometers, marking a 43% increase from the previous period [2] - The UHV alternating current network has expanded significantly, with the length increasing from 12,000 kilometers to over 20,000 kilometers, a growth of over 67% [2] Group 2: Clean Energy Transition - The proportion of clean energy transmitted through UHV direct current channels has risen from less than 40% at the end of the 13th Five-Year Plan to nearly 60% in 2024, with annual clean energy transmission reaching 420 billion kilowatt-hours, a 70% increase [6] - The construction of UHV transmission channels has accelerated, with projects like the first "wind-solar-fire-storage integrated" UHV project and the "desert energy" transmission channel successfully operational [7][8] Group 3: Technological Innovations - China's UHV technology has achieved breakthroughs in various fields, establishing a self-controlled technical standard system [11] - Key technologies have overcome significant challenges, such as high-altitude construction and integrating large hydropower stations [12] - The integration of digital technology has enhanced the efficiency and reliability of the UHV network, with significant improvements in operational decision-making and equipment assessment [12] Group 4: Global Leadership and Export - China has established itself as a global leader in UHV technology, with the unique ±1100 kV UHV direct current transmission technology setting international standards [13] - Successful projects like the Belo Monte UHV project in Brazil demonstrate China's capability to export high-end equipment and technology [13]