On November 22, with the 7521 switch transferred from cold standby to operation, the 750 kV Liangqing Lines I, II, and III entered the charging operation state for the Pingliang measurement point, marking the successful commissioning of the expansion project of the Pingliang 750 kV substation, part of the grid connection project of the Longdong Converter Station—an important hub station connecting the Gansu, Shaanxi, and Ningxia power grids—which will provide strong support for the safe and stable operation of the Gansu power grid.

It is reported that the Longdong–Shandong ±800 kV ultra-high-voltage direct current (UHVDC) transmission project is China's first large-scale integrated energy base export project featuring the integration of wind, solar, thermal, and storage, and the Longdong DC project and its supporting 750 kV power transmission and transformation project are important supporting facilities of the "Gansu Power to Shandong" project. Once completed, the project will enhance Gansu's power export capacity, meet the demand for transmitting large-scale new energy power, provide strong AC grid support at the sending end for the Longdong–Shandong ±800 kV UHVDC transmission project, and is of great significance for meeting the province's new energy export needs and improving the level of new energy consumption and export.