用电负荷无缝切换技术

Search documents
“无缝切换”“交通分流”“虚拟电厂” 各地多措并举保障迎峰度夏电力稳定供应
Yang Shi Wang· 2025-07-10 08:44
Core Insights - The article highlights the increasing electricity demand in China due to rising temperatures, prompting various measures to ensure power supply during peak summer periods [1][3]. Group 1: Electricity Demand and Supply - Since July, the highest load in the State Grid operating area reached 11.96 million kilowatts, with nine provincial grids, including Shandong, Jiangsu, Anhui, and Fujian, setting 21 new records [3]. - On July 9, the Southern Power Grid recorded a peak load of 2.52 million kilowatts, marking a historical high, with Guangdong becoming the first province in China to exceed 16 million kilowatts in power load [3]. Group 2: Power Supply Measures - To ensure power supply, China is leveraging the resource allocation capabilities of its ultra-high voltage power grid, with inter-regional and inter-provincial power transmission exceeding 21 million kilowatts [5]. - Various flexible measures are being implemented to address peak electricity demand, such as the "seamless switching" technology introduced in Laixi, Shandong, which allows for rapid load transfer between lines in as little as 15 seconds [7][9]. Group 3: Innovative Solutions - The Laixi Power Supply Company has developed a system that functions like "traffic diversion," quickly transferring loads to less utilized lines, enhancing the safety and reliability of the entire power grid [9]. - In Ningbo, Zhejiang, a "virtual power plant" has been established, integrating energy storage devices and air conditioning loads to create a flexible resource pool exceeding 300,000 kilowatts, ensuring balance during peak demand [11]. Group 4: Coal and Gas Supply Stability - The National Energy Administration reports that since 2025, coal supply has been stable, with national coal inventories exceeding 200 million tons, sufficient for over 30 days of use [14]. - Both long-term contract prices and spot prices for coal have decreased, effectively lowering energy costs, while natural gas supply remains secure with over 11 billion cubic meters injected into underground storage [14].