“宁电入湘”背后“超级装备”做硬核保障

Core Viewpoint - The Ningxia to Hunan ±800 kV UHVDC transmission project, known as "Ningdian Ruxiang," has been fully commissioned, with a maximum transmission capacity of 8 million kW, capable of delivering 36 to 40 billion kWh of electricity annually to Hunan [1] Group 1: Project Overview - The project spans 1,616 kilometers, starting from Zhongning Converter Station in Ningxia and passing through Gansu, Shaanxi, Chongqing, and Hubei before reaching Hengyang Converter Station in Hunan, with a total investment of 28.1 billion yuan [1] - The project faced significant challenges due to its long distance and complex geographical environment [1] Group 2: Key Equipment - High-end converter transformers, regarded as the "heart" of UHVDC projects, play a crucial role in the conversion of AC to DC and in voltage and power regulation [1] - The Hengyang Converter Station features 14 high-end converter transformers independently designed and manufactured by TBEA, marking a significant achievement in domestic production capabilities [1] Group 3: Technological Advancements - TBEA enhanced the manufacturing precision and reliability of the transformers by reducing the number of welding points from over 450 to 42, improving reliability by tenfold and significantly increasing short-circuit resistance [2] - The transformers were designed to maintain a temperature rise below 35K, compared to the industry average of 40K, thereby extending their operational lifespan [2] Group 4: Supporting Infrastructure - The Zhongning Converter Station was custom-designed with earthquake-resistant epoxy resin impregnated paper capacitive DC bushings to ensure safe operation in a seismically active area [3] - TBEA upgraded traditional manufacturing processes to high-precision CNC plasma cutting systems to meet the high stability requirements for transformer oil tanks [3] - Innovative steel core aluminum stranded wire products were developed using an intelligent production system, enhancing production efficiency and ensuring high-quality conductors with micron-level precision [3]