特高压架起电力“闪送通道”（“十四五”，我们见证这些硬核突破④）

Core Insights - The construction of ultra-high voltage direct current (UHVDC) transmission lines in China is accelerating, with a focus on delivering clean energy from western regions to eastern consumption areas [10][11][14] - The Ningxia-Hunan ±800 kV UHVDC project is the first approved transmission corridor primarily for renewable energy from the "desert, Gobi, and barren" wind and solar power bases, capable of delivering over 36 billion kWh annually to Hunan, with more than 50% from renewable sources [12][13] - By the end of 2023, China's UHVDC transmission capacity is expected to exceed 340 million kW, a 25% increase from the end of the 13th Five-Year Plan [7][11] Group 1: Project Developments - The Gansu-Zhejiang ±800 kV UHVDC project has entered the line construction phase, indicating ongoing infrastructure development [4] - The Baihetan-Jiangsu ±800 kV UHVDC project exemplifies the efficiency of UHVDC technology, reducing transmission time to just 7 milliseconds for electricity from Sichuan to Jiangsu [9] - The Lonyang-Shandong ±800 kV UHVDC project, which is the first integrated energy base project, has been completed and is expected to deliver 36 billion kWh annually, with over half from renewable sources [12][13] Group 2: Technological Advancements - The "14th Five-Year Plan" period has seen significant advancements in UHVDC technology, with the total length of UHVDC lines expected to grow from 28,000 km to over 40,000 km [11][15] - The introduction of standardized ±800 kV/800 MW UHVDC technology has led to the creation of over 500 various standards and specifications, enhancing the domestic power equipment manufacturing capabilities [15][17] - Breakthroughs in "bottleneck" technologies have been achieved, including the use of domestically produced equipment, which reduces reliance on foreign technology [17]