我国抽水蓄能机组有了“超强新肺” 首台大型国产变速抽蓄机组励磁系统成功下线

Core Viewpoint - The successful development and testing of the 300 MW variable-speed pumped storage unit's AC excitation system marks a significant advancement in China's energy technology, breaking foreign monopolies and enhancing the construction of a new power system [1][2]. Group 1: Technological Advancements - The newly developed AC excitation system is ten times the capacity of conventional fixed-speed pumped storage units, ensuring precise control and output capabilities for variable-speed units [1]. - The variable-speed pumped storage unit can adjust its power output by nearly 50% through a 7% change in speed, making it more efficient in storing and utilizing intermittent renewable energy [2]. - The innovative "device series + branch parallel" technology route was adopted to overcome technical challenges, achieving output current and voltage levels that are three times and ten times higher than those of fixed-speed units, respectively [2]. Group 2: Project Implementation - The 300 MW and 400 MW domestic variable-speed pumped storage units have been included in the list of major technological equipment in the energy sector, reinforcing the technological and equipment support for green energy transition [3]. - The construction of the two projects, located in Zhaoqing and Huizhou, is progressing with plans for commissioning in 2026 and 2027, respectively [3].