SU987016A2 - Underground water-accumulating power station - Google Patents

Description

The invention relates to hydropower and hydropower plants and can be applied in the design and construction of pumped storage power plants.

According to the main auth. No. 746028 is known for the underground pumped storage power station (.HPP), and the upper pool, made in the form of an underground cavity, connected to a source of compressed gas, the building of the HPSP and the underground downstream reservoir. When the power plant is operating at peak times, the hydraulic machines operate as turbines, and electric machines as generators, generating electricity. The compressed gas in the upstream reservoir generates pressure at the station. In the hours of failure of the hydroelectric machine load, the PSPs operate as a pump, pumping water from the downstream reservoir to the upstream reservoir and compressing the gas in it. Thermal insulation of the walls of the tank makes it possible to raise the temperature of the compressed gas and, as a result, its pressure.

The disadvantage of the known underground storage pumping station is that the water will be saturated with gas. This will also contribute to elevated pressure and temperature. With the passage of water through the turbine, as a result of a sharp drop in pressure, a rapid release of gas from water is observed, which adversely affects the operation of the turbine, reduces its power and, in some cases, can cause the turbine to work in cavitation mode.

Purpose . the invention. - -increase reliability.

This goal is achieved by

15 that the headwater reservoir is provided with a separating device in the form of buoyancy located on the surface of the water ..

In this case, buoyancy is performed in

20 in the form of granules, or a lib made of foamed polymeric material, for example, foam plastic, or in the form of a floating shield, in the form of a layer of water-immiscible liquid.

25

In addition, in order to compensate for the loss of compressed gas and increase the operating efficiency of the station, the upstream reservoir is equipped with an aeration pipe equipped with

Claims (6)

30 valve. The drawing shows the offer underground GAES. The proposed underground power plant contains a machine room 1, in which hydraulic machines 2 and electric machines 3 are installed. Hydraulic machines 2 are connected by pipeline 4 to reservoir 5 of the tail bay and pipeline 6 with the cut of the 7 downstream pool. The cavity of tank 5 is filled with compressed gas / supplied compressor 8, through pipes 9 and 10. The walls of tank 5 are covered with a gas-tight lining and heat insulating material. A separating device 11, made in the form of buoyancy placed on the surface of the water, is installed in the upper pool 5. The separating device 11 may be made in the form of granules of a material with a lower specific weight than the specific weight of water. For example, from granules of foamed polymeric material (foam) or immiscible water liquid, in the form of buoyancy. shield Reservoir 5 of the upper reach is equipped with an aeration pipe 9 with a check valve 12, which opens upon the formation of 5 vacuum in the reservoir, which will compensate for the gas losses. During the work of the HPSP during peak hours hydro. Machines 2 operate as turbines and electric machines 3 as generators, generating electricity. At the same time, water from reservoir 5 through line 4 goes to hydraulic machines 2, gives them energy and is discharged through pipeline .6 to downstream tank 7. The compressed gas in reservoir 5 increases the pressure at the station, which makes it possible to reduce the difference in the position of reservoirs 5 and 7. This reduces the construction costs. The presence of a separating device eliminates the possibility of water saturation with gas and, as a consequence, a decrease in the power of the HPS and the operation of the turbines in cavitation modes, i.e. increases the reliability of the power plant. The choice of the type of floating separation device depends on the size of the upper and lower pools, the differential pressure and the power of the plant. A separating device, made of granules of material with a specific weight less than the specific gravity of water, is applicable to all types of pumped storage plants and does not depend on the overall size of the headwater reservoir. A separating device with a floating shield is applicable to PSPPs in which the reservoir has a constant cross section in height. A separating device in the form of a non-mixing layer: with a liquid with water is applicable for low-pressure PSPs. The presence of the aeration pipe 9 and the compressor 8 makes it possible to compensate for possible losses of compressed gas and to increase the depth of the drawdown. The invention is possible and expedient to apply. In hydropower construction. Its use will make it possible to increase the reliability of work under the earth's electric pumped chamber. .stations. Claims 1. Underground pumped storage power station, auth. 746028, characterized in that, in order to increase reliability of operation, the headwater reservoir is provided with a separating device in the form of buoyancy located on the surface of the water. : 2. The power plant of claim 1, wherein the buoyancy is in the form of pellets. 3. The power plant according to claims 1 and 2, distinguishing from the fact that the granules are made of foamed polymeric material, for example foam plastic. 4. The power plant according to claim 1, about the fact that the buoyancy is made in the form of a floating shield 5. A power plant according to claim 1, characterized in that the buoyancy is made in the form of a layer of a water-immiscible liquid. 6. The power plant in accordance with claim 1, which is designed so that, in order to compensate for the loss of compressed gas and increase the efficiency of the station, the upstream reservoir is equipped with an aeration pipe equipped with a check valve. Sources of information taken into account in the examination 1. USSR author's certificate 746028, cl. E 6-2 L 9/00, 1975. eight