Guangzhou Pumped Storage Hydropower Station

Guangzhou Pumped Storage Hydropower Station Tourist Resort is located in Lutian Town, Conghua. It is a perfect combination of high technology and nature, and has the characteristics of industrial tourism. It is the largest pumped storage power station in the world and was rated as AAA scenic spot by the National Tourism Administration in 2002. The construction of the hydropower station was started in 1989 and completed in 12 years. The total investment is 6.5 billion yuan, covering 27 square kilometers. The power station hub project is very grand, mainly composed of upper and lower reservoirs, two underground power houses and 30 km underground passages. The drop of the upper and lower reservoirs is more than 500 meters, and the storage capacity is 24 million cubic meters. When the Daya Bay nuclear power station or Guangdong power grid is in the low valley of power consumption and there is surplus electric energy, the surplus electric energy will be input into the energy storage unit, pumping the water from the lower reservoir to the upper reservoir, converting the electric energy into the potential energy of water, which is known as "pumped storage". When the power grid is in the peak of power consumption, the water from the upper reservoir can be put down to drive the generator to generate electricity to meet the demand of electricity So that the power supply quality of the whole power grid can be improved. Two 9-meter-diameter diversion tunnels, 4000 meters long, run through the upper and lower reservoirs and connect the underground powerhouse. The underground powerhouse is equipped with 8 sets of energy storage generating units imported from France and Germany, with a total installed capacity of 2.4 million kW / h, ranking first in the world. The 450 meter factory building is 45 meters high, 156 meters long and 22 meters wide. If you think the number is too abstract, you might as well imagine that it is a factory building that can fill in the whole Aiqun hotel. Is it concrete enough?! There is no one on duty in the plant, which is totally monitored by a set of double backup intelligent computer system. Eight units can be started and stopped remotely in Guangzhou and Hong Kong. The high-tech modernization level has really reached the world-class level. The whole scenic spot is dominated by primary secondary forest, surrounded by mountains, with fresh air and high negative ion content, which is difficult to achieve in general industrial areas, and the green coverage rate is more than 90%. The area has lush trees and green grass. Pavilions, pavilions and pavilions are scattered in an orderly manner, and all the winding paths are ingeniously connected with the surrounding buildings.

Guangzhou Pumped Storage Hydropower Station

This entry is compiled and applied by "popular science China" Science Encyclopedia

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Guangzhou Pumped Storage Power Station, located in Lutian Town, Conghua District, Guangzhou City, Guangdong Province, China, is a pure pumped storage power station, 90 km away from Guangzhou city. It is a supporting project of Dayawan Nuclear Power Station and Ling'ao nuclear power station, with a total installed capacity of 2400mw. The upper reservoir is located on the Chenhedong stream in the upper reaches of zhaodashui, and the lower reservoir is located in Xiaoshan basin in the upper reaches of jiuqushui. It is the main frequency modulation power plant in Guangdong power grid.

brief introduction

Guangzhou Pumped Storage Power Station, located in Lutian Town, Conghua District, Guangzhou City, Guangdong Province, China, is a pure pumped storage power station, 90 km away from Guangzhou city. It is a supporting project of Dayawan Nuclear Power Station and Ling'ao nuclear power station, with a total installed capacity of 2400mw. The upper reservoir is located on the Chenhedong stream in the upper reaches of zhaodashui, and the lower reservoir is located in Xiaoshan basin in the upper reaches of jiuqushui. It is the main frequency modulation power plant in Guangdong power grid.

The first phase was put into service from 1993 to 1994, with four 300MW generators. Hong Kong Zhonghua power has the right to use 50% of the first phase of power generation for 40 years until 2034.

The second phase was put into service from 1999 to 2000, with four 300MW generators.

Guangzhou Pumped Storage Power Station is the first pumped storage power station in China.

effect

The commissioning of Guangzhou Pumped Storage Hydropower Station will play an important role in ensuring the safe and stable production of Daya Bay nuclear power station, optimizing the structure, safe and economic operation and improving the power supply quality of Guangdong power grid and Hongkong Zhonghua power company. The power station with a total installed capacity of 2.4 million kilowatts was jointly built by Guangdong Electric Power Group Co., Ltd., China National Development and Investment Corporation and Guangdong Nuclear Power Investment Co., Ltd., with a total investment of 6 billion yuan. The main project of the power station was undertaken by Sinohydro 14 Bureau.

Construction reasons

Since the implementation of the special economic policy in Guangdong Province, the industrial and agricultural production has developed rapidly, the power load has increased sharply, the peak valley difference is wide, and the minimum load rate is low (b = 0.51); Guangdong power grid is mainly thermal power, while most of the 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 operation; at the same time, after the Dayawan Nuclear Power Station is put into operation, it is necessary to start from Anya nuclear power plant The whole economy is only suitable for base load operation. Therefore, in order to increase the peak shaving capacity in the grid and cooperate with the construction of nuclear power and large capacity thermal power stations, it is urgent to build pumped storage power stations near Guangzhou, which is close to the load center. It is proved that the installed capacity of 1.2 million kW is suitable. After the power station is put into the system, it will play the role of peak load regulation and valley filling, so that the nuclear power station can run at full load for a long time, and the low valley power can be changed into peak load regulation power (the level in 2000 can change the low valley power of 3.138 billion kw · h into peak power of 2.38 billion kw · h), which can increase the income of power sales; it is more economical than the peak load regulation of thermal power; it can also improve the economic operation conditions of the system (the level in 2000 can save the annual operation cost, equivalent to about 10% of standard coal) The dynamic benefit, economic benefit and social benefit are very significant.

Design

Guangzhou Pumped Storage Power Station is composed of upper reservoir, diversion tunnel, upstream surge shaft, high pressure tunnel (pipeline), underground powerhouse system, tailrace surge shaft and tailrace tunnel. The normal water level of the upper reservoir and the lower reservoir are 810m and 283m respectively, the storage capacity is 17 million cubic meters and 17.5 million cubic meters respectively, and the effective storage capacity is 10 million cubic meters; the reinforced concrete face rockfill dam is adopted for the dam, the crest elevation is 813m and 286.3m respectively, the maximum dam height at the dam axis is 60m and 37m, the crest width is 8m, and the upstream and downstream dam slopes are 1:1.4. The upper reservoir adopts the side channel type bank spillway, the width of the side weir is 40m, the elevation of the weir top is flush with the normal pool level, and there is no gate to overflow freely; the right dam head of the lower reservoir is provided with two side channel type bank spillways with 9m width each, the elevation of the weir top is 281m, and the bottom outlet with 1m diameter is set on the left side of the spillway. The waterway system adopts the water supply (drainage) mode of one tunnel and four units; the length of the diversion tunnel from the water intake to the upstream surge shaft is about 925m, and the inner diameter of the lining is 9m; the upstream surge shaft adopts the impedance type, the inner diameter of the large shaft is 18m, the inner diameter of the connecting pipe is 9m, the maximum surge is 825m, and the minimum surge is 787.31m; the pressure tunnel adopts the inclined shaft layout after the surge shaft, and the first tunnel before entering the plant bifurcates into four adits, with a total length of 1395.4m, and the main pipe length is 1395.4m The inner diameter is 8.5-8m; four draft tubes are combined into one to enter the tailrace surge shaft, and the tailrace surge shaft is also of impedance type. The inner diameter of the large shaft is 20m, the inner diameter of the connecting pipe is 9m, the top elevation is 313M, and the bottom elevation is 250m; the length of the tailrace tunnel from the tailrace surge shaft to the downstream outlet is about 1230.7m, and the inner diameter of the lining is 9m.

Geological structure

The upper and lower reservoirs belong to Liuxi River system. The upper reservoir is located in Chenhedong basin in the upper reaches of zhaodashui River, with a rainfall collection area of 5 square kilometers above the dam site, an average annual flow of 0.209 cubic meters per second and an average annual runoff of 6.6 million cubic meters; the lower reservoir is located in Xiaoshan basin in the upper reaches of jiuqushui River, with a rainfall collection area of 13 square kilometers above the dam site, an average annual flow of 0.544 cubic meters per second and an average annual runoff of 17.16 million cubic meters. The topography of the upper reservoir is a natural reservoir basin. Most of the bedrock that constitutes the bottom and Bank of the reservoir is granite. Only a small amount of sand shale is distributed in the southeast corner of the right reservoir tail. They are in close contact with each other. Most of the faults are not wide and filled with well cemented tectonic rocks. Groundwater supplies the reservoir, so it will not leak out of the reservoir after impoundment. Although limestone is distributed at the bottom of the reservoir, it is surrounded by granite mountains and is a closed residual body; faults around the reservoir and leading to the outside of the reservoir are generally small in scale and well cemented; groundwater supplies the reservoir, so it will not leak out of the reservoir. The dam site of the upper reservoir has narrow valley, strong mountains on both sides, granite, single lithology, small-scale fault structure and superior geological conditions. The foundation stone of the lower reservoir is also granite, the alluvium of the river reservoir is thin, the fully and strongly weathered zone of the slopes on both banks is not deep, and the rock in the weakly weathered zone is hard. Although the faults are relatively developed, it still has good conditions for dam construction. According to the appraisal of the Seismological Bureau of Guangdong Province, the basic intensity of the earthquake in this power station area is 6 degrees. The lithology of the water diversion system is mainly medium coarse biotite granite with a small amount of lamprophyre veins and fine-grained granite veins. Large scale faults are NW trending faults such as F2, F4, f109, F110, etc. The geological conditions of the diversion tunnel are mainly controlled by faults and altered rocks. The route can be divided into four sections, the second and the fourth of which are the main ones. The lithology of underground powerhouse is also granite, so F4 fault, f179 and dense alteration zone should be avoided as far as possible.

Tourism information

Guangzhou Pumped Storage Power Station is a national industrial tourism demonstration site and the only high-tech tourist attraction in Guangdong Province. Mainly from the power station hub

Chinese PinYin : Guang Zhou Xu Neng Shui Dian Zhan