Both the upper and lower reservoirs belong to Liuxi River system. Shang Reservoir is located in the Chenhe River Basin in the upper reaches of Zhaodashui River, with a rainwater collection area of 5 square kilometers above the dam site, with an average annual flow of 0.209 cubic meters per second and an average annual runoff of 6.6 million cubic meters. Lower reservoir is located in Xiaoshan basin in the upper reaches of Jiuqu River. Dam site area 13 km2, with an average annual runoff of 0.544 cubic meters per second, 1.7 1.6 million cubic meters. The topography of the upper reservoir is a natural reservoir basin, and most of the bedrock forming the reservoir bottom and bank is granite, and only a small amount of sand shale is distributed in the southeast corner of the right reservoir tail, which is in close contact with each other. Most faults are small in width and filled with well cemented tectonic rocks; Groundwater is supplied to the reservoir, so it will not leak out of the reservoir after storage. Although limestone is distributed at the bottom of the lower reservoir, it is surrounded by granite mountains and is a closed residue. The faults around the reservoir and leading to the outside of the reservoir are usually small in scale and well cemented; Groundwater supplies the reservoir, so it won't leak out of the reservoir. The upper reservoir dam site has narrow valley, strong mountains on both sides, granite, single lithology, small fault structure and superior geological conditions. The foundation stone of the lower reservoir is also granite, the alluvial layer of the river reservoir is thin, the fully weathered and strongly weathered zones on both sides of the hillside are not deep, and the rocks in the weakly weathered zone are hard. Although faults are developed, it still has good dam-building conditions. According to the Guangdong Earthquake Administration, the basic earthquake intensity in this power station area is 6 degrees. The lithology of the water diversion system is mainly medium-coarse grained biotite granite, with a small amount of lamprophyre veins and fine grained granite veins. F2, F4, F 109, F 1 10 and other large NW-trending faults. The geological conditions of the diversion tunnel are mainly controlled by faults and altered rocks, and it can be divided into four sections along the line, including the second section (2+0 10 ~ 2+500) and the fourth section (2+9 10 to the entrance and exit of the lower reservoir). The lithology of underground powerhouse is granite, so we should try our best to avoid F4 fault and its nearby F 179 and dense alteration zone. Since the implementation of the special economic policy in Guangdong Province, industrial and agricultural production has developed rapidly, with a sharp increase in electricity load, a wide peak-valley difference and a low minimum load rate (b = 0.5 1). Guangdong power grid is dominated by thermal power, and most thermal power units are high-temperature and high-pressure condensing coal-fired units with high minimum technical output, which should only be arranged in the base load; At the same time, after Daya Bay Nuclear Power Station is put into operation, it is only suitable for base load operation from the perspective of safety and economy. Therefore, it is urgent to build a pumped storage power station near Guangzhou, which is close to the load center, in order to increase the peak-shaving capacity of the power grid and cooperate with the construction of nuclear power and large-capacity thermal power plants. It is proved that the installed capacity of the energy storage power station is 654.38+200,000 kilowatts. After the power station is put into the system, it plays the role of peak-shaving and valley-filling, making the nuclear power station run at full load all the year round, and the low-valley electricity will be changed into peak-shaving electricity (in 2000, the low-valley electricity will be changed from 310.38 billion kW h to 2.38 billion kW h peak electricity), which will increase the income from electricity sales; More economical than thermal power peak shaving; It can also improve the economic operation conditions of the system (in 2000, the annual operation cost can be saved by about 6,543.8+0,000 tons of standard coal, and the wastewater can be used more by about 900 million kW·h), providing spare capacity for the system, which has remarkable power, economic and social benefits.
Guangzhou Pumped Storage Power Station Hub consists of upper reservoir, diversion tunnel, upstream surge shaft, high pressure tunnel (pipeline), underground powerhouse system, tailrace surge shaft and tailrace tunnel. The normal water levels of the upper and lower reservoirs are 8 10m and 283m respectively, and their storage capacities are170,000 m3 and175,000 m3 respectively, and their effective storage capacities are100,000 m3. The dams all adopt reinforced concrete face rockfill dams, with the crest elevation of 8 13m and 286.3m respectively, the maximum dam height along the dam axis of 60m and 37m respectively, the crest width of 8m, and the upstream and downstream dam slopes of 1: 1.4 respectively. The upper reservoir adopts a side-channel bank spillway with a width of 40m. The elevation of the weir crest is flush with the normal water level, and there is no gate, so it can overflow freely. The right dam head of the lower reservoir is equipped with two side-grooved bank spillways controlled by gates, with a width of 9m and a weir crest elevation of 281m. The left side of the spillway is equipped with a bottom hole with a diameter of1m.. The waterway system adopts the water supply (drainage) mode of 1 hole 4 machine; The diversion tunnel is about 925m long from the intake to the upstream surge shaft, and the inner diameter of the lining is 9 m; The upstream surge shaft adopts impedance type, with the diameter of large well 18m, the diameter of connecting pipe 9m, the highest surge 825m and the lowest surge 787.31m; ; The inclined shaft is arranged behind the surge shaft in the pressure tunnel. Before entering the factory, the 1 hole bifurcates into four holes, with the total length of 1395.4 and the inner diameter of the main pipe of 8.5 ~ 8m. Four draft tubes are merged into 1 and enter the tailrace surge tank, which is also impedance type. The diameter of the big well is 20m, the connecting pipe is 9m, the wellhead elevation is 3 13m, and the bottom elevation is 250m. The tailrace tunnel is about 1230.7 m long from the tailrace surge shaft to the downstream outlet, and the inner diameter of the lining is 9 m. Guangzhou Pumped Storage Power Station is designed by Guangdong Water Resources and Hydropower Survey and Design Institute. After bidding, the 14th Hydropower Bureau of the Group Company undertook the construction task, and Zhongnan Branch of China Water Conservancy and Hydropower Construction Engineering Consulting Company undertook the project supervision. This project was approved by Guangdong Provincial Planning Commission 1988 in March, 20 10, and is ready to start construction.