Core Points - The Qinghai-Henan ±800 kV UHVDC project has successfully completed its annual maintenance, ensuring reliable power supply for the upcoming winter peak [1] - This project is the world's first long-distance transmission channel for renewable energy and is a crucial part of China's "West-to-East Power Transmission" initiative [1] - Since its operation, the project has delivered a total of 86.8 billion kWh of clean electricity to Henan, equivalent to a reduction of 39.06 million tons of standard coal consumption and a decrease of 64.23 million tons of CO2 emissions [1] Project Details - The Qinghai-Henan UHVDC project spans over 1,500 kilometers, passing through four provinces: Qinghai, Gansu, Shaanxi, and Henan [1] - The annual maintenance includes the innovative use of drones for data collection, enhancing the precision and efficiency of operations [1] - Maintenance and optimization upgrades were conducted on the intelligent inspection system at the Qingnan converter station [1]