“十四五”成就综述·电网篇丨我国建成世界规模最大、最复杂输变电工程

Core Insights - China's electricity consumption is projected to exceed 10 trillion kilowatt-hours by 2025, surpassing the total consumption of the EU, Russia, India, and Japan combined for 2024 [1] - The country has established the world's largest and most advanced power transmission network, with a reliability rate of 99.924% [1] Group 1: Power Transmission Capacity - During the "14th Five-Year Plan," China's ultra-high voltage (UHV) construction accelerated, increasing cross-province and cross-region transmission capacity 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, a 43% increase from the 28,000 kilometers during the "13th Five-Year Plan" [2] - The length of UHV alternating current lines has increased by over 67%, from 12,000 kilometers to over 20,000 kilometers [2] Group 2: Electricity Demand and Load - In the summer of 2025, China's electricity load reached a historical peak, with the total electricity consumption exceeding 1 trillion kilowatt-hours for two consecutive months [3] - The peak load reached 1.508 billion kilowatts, setting a new record [3] Group 3: Green Energy Transition - The proportion of clean energy transmitted through cross-regional UHV direct current channels increased from less than 40% at the end of the "13th Five-Year Plan" to nearly 60% by 2024, with annual clean energy transmission reaching 420 billion kilowatt-hours, a 70% increase [4] - New UHV projects have been developed to facilitate the transmission of renewable energy, including the first integrated UHV project for wind, solar, and storage [4] Group 4: Technological Advancements - China's UHV technology has achieved breakthroughs in various fields, establishing a self-controlled technical standard system and creating 26 world-first achievements [6] - Key technologies have overcome significant challenges, such as high altitude and severe weather conditions, enhancing the country's position as a global leader in UHV technology [6] - The integration of digital technology has improved the efficiency and reliability of the power grid, with significant advancements in operational decision-making and equipment assessment [7] Group 5: Global Influence - China's UHV technology is being exported globally, exemplified by the successful operation of UHV projects in Brazil, which has facilitated the export of clean hydropower over long distances [7] - The development of a comprehensive energy security network supports China's modernization and green development goals [7]