这一年，电网骨干网架纵横延伸，配网“毛细血管”精准织密

Core Viewpoint - The article emphasizes the significant advancements in China's power grid construction aimed at establishing a new type of power system by 2025, focusing on safety, sustainability, and development, with record-high investments and enhanced energy transmission capabilities [1][2][4]. Investment and Infrastructure Development - In 2023, the State Grid's fixed asset investment is expected to exceed 650 billion yuan, while the Southern Power Grid plans to invest 175 billion yuan, both marking historical highs [1]. - Key projects completed include four ultra-high voltage projects and the second phase of the Qinghai-Tibet interconnection, enhancing cross-regional energy allocation capabilities [1]. Project Highlights - The Jinshang-Hubei ±800 kV ultra-high voltage direct current project, spanning nearly 1900 kilometers, will deliver approximately 40 billion kWh of clean electricity annually, replacing about 12 million tons of standard coal and reducing CO2 emissions by around 30 million tons [1]. - The Southern Power Grid has successfully upgraded its backbone network, including the Hainan 500 kV provincial main network, which marks a historic transition from 220 kV to 500 kV operations [2]. Collaborative Efforts and Innovations - Five flexible interconnection projects have been approved, marking a deep collaboration between the State Grid and Southern Power Grid in the flexible direct current sector, with plans to build five new converter stations [4]. - Technological innovations, such as the world's first direct current site-level cascading technology and the first ±800 kV ultra-high voltage quantum current sensor, are enhancing the grid's capacity to support high proportions of renewable energy [5]. Energy Supply and Market Dynamics - During the peak summer period, national electricity load reached new highs, with significant inter-provincial electricity resource circulation aiding in efficient energy distribution [4]. - The Southern Power Grid provided 1.8 million kW of clean electricity to support the Yangtze River Delta region, demonstrating the effectiveness of cross-regional electricity trading [4].