en.Wedoany.com Reported - Affected by persistent high temperatures, the peak system load of Guangdong Power Grid recently reached 173 million kilowatts, up 5.3% from the 2025 annual peak, posing severe challenges to grid operation. Since May, 35 pumped storage units in the Guangdong-Hong Kong-Macao Greater Bay Area have been operating continuously under high load, with daily pumped-storage power generation exceeding 100 million kilowatt-hours for multiple days, and the daily pumped-storage power generation per unit once surpassing 3 million kilowatt-hours, providing crucial support for grid peak shaving and peak load supply.
Currently, 35 pumped storage units are in operation in the Guangdong-Hong Kong-Macao Greater Bay Area, with a total installed capacity of 10,880 megawatts, accounting for about one-sixth of the nation's operational pumped storage units. In May, the cumulative operating hours of the units reached 10,009.38 hours, a year-on-year increase of 21.14%; pumped-storage power generation reached 2.402 billion kilowatt-hours, up 27.15% year-on-year; and the number of unit starts reached 4,086, an increase of 8.01% year-on-year. These figures fully demonstrate the important role of pumped storage power stations as the core regulation carrier of the new power system. "Facing rapid growth in high-temperature loads and electricity demand, pumped storage power stations, with their flexible operating characteristics and strong regulation capabilities, have become a key force in ensuring the safe and stable operation of the power grid," said Wang Junpeng, General Manager of the Centralized Control Center of CSG Energy Storage Operation Company.
High-frequency, long-duration unit operation also poses greater challenges to equipment maintenance. To ensure the safe and stable operation of the units, the operation company responded swiftly by actively conducting equipment inspections and maintenance work. Since May, 13 emergency defect rectifications have been carried out, with a 100% timely rectification rate and an average rectification time controlled within 4 hours, effectively ensuring the healthy operation of the units and providing solid support for reliable power supply to the grid.
In the next step, CSG Energy Storage Company will closely monitor temperature changes, grid load, and new energy output trends, continuously strengthen equipment operation and maintenance management, fortify the safety production line, and make every effort to ensure the safe and reliable supply of electricity in the southern region during the peak summer period.
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