Core Insights - Yunnan Energy Investment has officially commenced the construction of a 350MW salt cavern compressed air energy storage demonstration project in Anning City, marking the first high-altitude mountain salt cavern compressed air energy storage project in Southwest China [1][2] - The project aims to support the national "dual carbon" goals and establish a new power system in Yunnan, filling the gap in long-duration physical energy storage technology within the province [1][2] Project Overview - The project will have a single storage capacity of 1.75 million kilowatt-hours, with an energy storage duration of 8 hours, an annual turnover of 300 cycles, and a minimum utilization of 1,500 hours, leading to an annual power generation capacity of 525 million kilowatt-hours [1] - Total investment for the project is 1.872 billion yuan, utilizing retired salt caverns as storage mediums and designed to operate at pressures between 7MPa and 9MPa [1][2] Technical Features - The project includes an air compression system, turbine generator system, heat exchange system, and a 220kV booster station, integrating into the Yunnan power grid with a 42-kilometer connection to the Kunming Pujie substation [2] - It is expected to be completed and operational by the first half of 2027, serving multiple functions such as peak shaving, frequency regulation, and black start capabilities, thus acting as a "stabilizer" for grid safety [2] Strategic Importance - This project is a key component of Yunnan Energy Investment Group's "8+X" large energy industry system, promoting the integration of green electricity and energy storage [2] - The initiative addresses technical challenges in high-altitude environments by collaborating with universities and research institutions to develop a specialized energy storage system, enhancing overall energy utilization efficiency to over 70% [2]

Core Viewpoint - The Yunnan Energy Investment Group has officially commenced the construction of the 350MW salt cavern compressed air energy storage demonstration project in Anning City, which aims to support the national "dual carbon" goals and enhance the stability of the power grid in high-altitude regions [1][2]. Group 1: Project Overview - The total investment for the project is 1.872 billion yuan, making it a key initiative for Yunnan Province to develop a new power system [1]. - The project will utilize retired salt caverns (An1-An4) as energy storage mediums, with a designed operating pressure of 7MPa-9MPa and a construction scale of 350MW/1750MWh [1]. - The energy storage system is designed to operate on a "low valley storage, high peak release" principle, allowing for flexible energy regulation [1]. Group 2: Technical Specifications - The project will have an annual utilization of at least 1,300 hours, with an expected annual power generation of 465 million kilowatt-hours [1]. - The system can store up to 1.75 million kilowatt-hours of electricity, with a storage duration of 8 hours and an average turnover of 260 cycles per year [1]. - The construction includes an air compression system, turbine power generation system, heat exchange system, and a 220kV booster station, integrating into the Yunnan power grid [2]. Group 3: Strategic Importance - The project is a critical component of Yunnan Energy Investment Group's "8+X" energy industry system, promoting the integration of green electricity and energy storage [2]. - It addresses the technical challenges of high-altitude environments by collaborating with universities and research institutions to develop a specialized energy storage system [2]. - The implementation of this project is expected to stabilize fluctuations in renewable energy generation and enhance the grid's capacity to accept large-scale green electricity [2]. Group 4: Local Government Support - The Anning City government has committed to optimizing the business environment and providing excellent service to support the project's construction [3].