en.Wedoany.com Reported - Construction of the Gansu Huangcheng Pumped Storage Power Station has entered an acceleration phase. This million-kilowatt-level green energy storage facility, located deep in the Qilian Mountains, is pushing forward with the dam filling of the upper and lower reservoirs and underground tunnel excavation. At the construction site in Huangcheng Town, Sunan Yugur Autonomous County, Zhangye City, at an altitude of over 2,800 meters, over a hundred pieces of engineering machinery are operating in an orderly manner, and more than a thousand builders are simultaneously advancing multiple main projects in the valley.
The northern slope of the lower reservoir is undergoing frame beam slope protection construction. The total height of the slope is 111 meters, with a total length of 700.49 meters, divided into 6 slope levels and 5 berms. According to Zhang Guoyuan, Deputy Director of the Engineering Management Department of PowerChina Sunan Pumped Storage Co., Ltd., construction of the five berms has been completed, and work on the sixth slope level is being accelerated.
Inside the 979.86-meter-long ventilation and safety tunnel, which has been excavated through, construction of the main powerhouse, main transformer chamber, and tailrace chamber is progressing simultaneously. Builders are carrying out processes such as scaffolding, drilling, hole cleaning, charging, blasting, and mucking. Zhang Guoyuan stated that the project is located in a high-altitude, cold region with a limited effective construction period. As temperatures have recently risen, the team is seizing the golden construction period, coordinating resource allocation, and optimizing plans. To date, 17 tunnels, including the ventilation and safety tunnel and the access tunnel, have been successfully excavated through. The first-layer excavation and support of the three major caverns of the water conveyance and power generation system have been completed, and dam filling for the upper and lower reservoirs has commenced.
This project is a key implementation project under the national "Medium and Long-Term Development Plan for Pumped Storage (2021-2035)" and the Gansu Province "14th Five-Year Plan." It has a total installed capacity of 1,400 MW and a rated head of 547 meters. The project complex consists of an upper reservoir, a water conveyance system, an underground powerhouse system, a lower reservoir, and a ground switchyard. The project is classified as Class I, Large (I) scale.
In November 2021, PowerChina Power Investment Company, as the investment entity, took the lead in registering and establishing the project company "PowerChina Sunan Pumped Storage Co., Ltd." In February 2022, the project was listed as a major project in Gansu Province. In October of the same year, it received approval from the Gansu Provincial Development and Reform Commission, becoming the first approved pumped storage power station project in the province. In June 2024, full-scale construction of the project began.
According to Yang Guang'an, Member of the Party Committee, Deputy General Manager, and Chief Engineer of PowerChina Sunan Pumped Storage Co., Ltd., upon completion, the power station will primarily undertake tasks such as peak shaving, valley filling, energy storage, frequency regulation, phase modulation, and emergency backup for the Gansu power grid and its external transmission bases. This will help promote the consumption of clean energy sources like wind and solar power and support the green energy transition of the regional energy system.
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