Industry News - The National Energy Administration has established seven standardization technical organizations, including the Power Safety Governance Standardization Technical Committee [2] - In 2025, the hotline platform received 24,468 complaints, primarily related to electricity installation, power outage repairs, and meter measurement [2] - National market regulatory authorities have investigated 1,169 illegal cases related to power banks, ensuring product quality and safety [3] - China has successfully developed a superconducting magnet with a magnetic field strength of 35.6 Tesla, marking a global record in high-temperature superconducting applications [3] - The China Electric Power Research Institute has achieved large-scale application of high-performance transformer protection technology, enhancing the safety of ultra-high voltage and high-voltage direct current projects [3] - Beijing aims to achieve an external green electricity supply of 65 billion kilowatt-hours by 2030 as part of its green transformation strategy [4] - Hainan Province has announced major offshore wind power projects for 2026, with a total investment of 71.75 billion yuan [4] - Qinghai Province plans to produce 16.9 million tons of lithium carbonate in 2025, representing a 25.3% increase, and will focus on developing the "salt lake+" industry [5] Corporate News - The global largest compressed air energy storage project has been fully commissioned, providing significant support for the construction of a new power system in China [8] - Electric Power Investment Corporation expects a net profit of 3 billion to 3.5 billion yuan in 2025, reflecting a year-on-year growth of 187.37% to 235.26% due to major asset restructuring [8]

Core Insights - The China Electric Power Research Institute has developed a "high-performance transformer inter-turn protection technology" that has been successfully applied in the State Grid Corporation's UHV and HVDC converter stations, addressing a long-standing technical challenge in the industry [1][2] - This technology has received the first prize of the State Grid Corporation's 2025 Science and Technology Progress Award, highlighting its significance in enhancing the safety and stability of large-scale AC and DC power grids [1] Group 1 - The transformer is a critical component in UHV and HV transmission systems, and its unique winding structure can lead to severe faults if minor inter-turn issues are not addressed quickly, posing risks to equipment and system safety [1] - Existing technologies have a response time of 50-60 milliseconds due to the complexity of fault processes, necessitating significant improvements in performance to reduce fault energy accumulation at high voltage levels [1] - The research team, guided by the State Grid Corporation, focused on key challenges in transformer protection principles and developed a new principle based on phase sequence differential current characteristics, reducing the protection response time to 20 milliseconds [1][2] Group 2 - Since 2022, the developed transformer protection technology has been implemented in 21 UHV and HVDC converter stations, with over 2000 units operating successfully [2] - The project has achieved a full-chain innovation from theoretical research to large-scale application, enhancing the protection technology of domestic high-end equipment and significantly improving transformer safety levels [2] - Under the "dual carbon" goals, this core technology will continue to support the safe and stable operation of China's large-scale AC and DC power grids, ensuring reliable electricity supply [2]

Core Viewpoint - The China Electric Power Research Institute has developed a "high-performance transformer inter-turn protection technology" that has been successfully applied in the State Grid Corporation's UHV and HVDC converter stations, addressing a long-standing technical challenge in the industry and enhancing the safety of large-scale AC and DC power grids [1][2] Group 1: Technology Development - The new protection technology significantly reduces the action time from 50-60 milliseconds to 20 milliseconds, effectively mitigating the risk of serious faults in transformers [1] - The technology is based on a new principle that utilizes the differences in phase sequence differential current characteristics to provide rapid protection against developing inter-turn faults [1] Group 2: Application and Impact - Since 2022, the developed transformer protection technology has been implemented in 21 UHV and HVDC converter stations, with over 2000 units operating successfully [2] - The project represents a full-chain innovation from theoretical research to large-scale application, enhancing the safety operation level of transformers and supporting the upgrade of domestic high-end equipment protection technology [2] - The core technology aligns with China's "dual carbon" goals, contributing to the stable operation of large-scale AC and DC power grids [2]