SK92013A3 - Underground pumped-storage power plant - Google Patents

Abstract

The invention relates to an underground pumped storage power plant, in which the working aqueous medium is led into the working space through a supply pipe (6) to the engine room (7), in which the Francis pumping turbine unit (8) is located, and to the engine room hall (7). connects the waste pipe (30) leading to the connecting tunnel (32) leading to the individual fields (33) of the underground tank (34), where this tunnel (32) is connected to the surface atmosphere by ventilation shafts (35), while the engine room (7) is further connected by a corridor (38) with the hall of the transformer station (31) with transformers (37), where an access tunnel (39) connecting the engine room (7) and the transformer station (31) is connected to the hall of the transformer station (31), which is brought to the surface in opposite directions into the space of the shaft tower (40), the corridor (38) being extended to the connecting tunnel (32) by an access corridor (41), so that the engine room hall (7) is connected by this access corridor (41) and the rising ventilation shaft (35) adjoining it. ) with ventilation object tom (36).

Description

Technical field

The invention relates to the technology of utilizing hydropower for its accumulation and then to obtaining it, with the possibility of replenishing it as a deficit substitute in the public distribution grid, by using the technology of pumping Francis turbine aggregates in bilateral turbine-pump mode.

BACKGROUND OF THE INVENTION

Currently there are a number of different types of pumped-storage power stations, using suitable sites and different waterworks, forming a natural supply of potential energy in the form of water in the tank above the power plant and vice versa the possibility of storing energy in water in the tank at the power plant level. .

None of these alternatives to pumped storage systems solve their installation in a deep underground construction, which is built specifically for this purpose when a pumped storage power plant with accessories is built in a high altitude underground facility and a special bottom retention tank is built, that the upper retention tank is formed by an artificially formed water body or natural water reservoir.

The subject of the invention is an underground pumped storage power plant consisting of an artificially constructed underground underground work on which a high-capacity retention tank is built at the bottom and underground spaces for the installation of a pumped-storage power plant with accessories.

• · ·· • ·

SUMMARY OF THE INVENTION

The above-mentioned disadvantages are solved by a system of an underground deep pumped-storage power plant built near a waterworks or a natural water reservoir, which is used as an upper retention tank. This system consists of a deep underground part, in which a pumped-storage power plant with accessories is built in the underground space, at a site of high altitude potential, and a special deep underground retention tank is built, for example in a system of parallel, interconnected tunnels. that this underground pumping system is equipped with inlet and securing elements to the working space, it is further formed and guided through the screening barrier and the plate closure through the supply piping to the machine room, which is connected to the machine room with the Francis turbine pumping unit waste pipe leading to the interconnecting tunnel leading to the individual fields of the underground tank, where this tunnel is connected to the surface atmosphere by ventilation shafts, while the hall of the engine room is further connected with the hall with the transformer hall a transformer station where an access tunnel is connected to the transformer station hall, connecting the engine room and the transformer station, and which is led in the opposite direction to the surface into the shaft tower space, the corridor extending to the tunnel through the access corridor so connected to it by a rising ventilation shaft with a ventilation object.

Furthermore, it is advantageous if the pumping Francis turbine of an underground pumped-storage power plant consists of a ball valve, a pumping Francis turbine and a motor generator, which are mounted in a frame, the ball valve being fitted with a rotary drive, the pumping Francis turbine connected to the ball valve. then, a guide ring is formed in which the guide blades are disposed on the inside, the arms of which are interconnected by rods, the pumping Francis turbine further comprising an impeller fixedly connected to a vertical shaft sealed by a gland, fitted with a pair of linear rotary drives each including a globoid Engaging in a tightening nut with toothing, the vertical shaft of the pumping Francis turbine being rotatably mounted in the frame in the bearings and by means of a start-up s The coupling is connected to an electric motor generator, whereby the drain pipe elbow is axially connected at the bottom of the transfer Francis turbine.

v <

Furthermore, it is advantageous if the arms comprise a drive arm which is elongated and pivotally connected to a linear hydraulic drive on the opposite side mounted on the distributor ring.

in

Furthermore, it is advantageous if the bottom of the underground tank is located above the upper level of the impeller of the transfer Francis turbine to constantly overload the working turbine.

Furthermore, it is advantageous if the ventilation shafts open into the ventilation object.

in

It is further preferred that the supply line, the pumping Francis turbine aggregate and the discharge line form a power branch.

Furthermore, it is advantageous if the power branches are more than one.

The concept and principles of the solution of the waterworks are given by the main purpose of the construction, ie. using hydropower in a pumped-storage power plant. The engine room of the pumped-storage power plant, located between the upper and lower reservoir, consists mainly of technological units.

In the upper and lower reservoir are placed inlet and outlet objects with the technological equipment necessary for operation of pumped storage power plant, such as racks, plate closures and other equipment controlled by automatic turbines and ensuring safe, trouble-free and reliable operation.

The water supply from the upper tank is designed by one separate steel feeder, divided in the lower part in front of the turbines into two separate feeders. Ball valves are located at the end of the ducts and upstream of the turbines to protect the turbines. In the engine room there are two aggregates with reverse Francis turbines, each of which is connected to a synchronous generator. The aggregates can work together or separately and ensure turbine or pump operation. Next to the hall of the engine room is a hall for transformation and distribution of electricity. At the same time, there is a complete electrical part, including a power outlet and connected to the grid. Phasing with the mains and its compensation in the form of power factor. Furthermore, the installed automation assumes control by central dispatching, with the aggregates designed for the production of highly valued peak energy and balancing unsteady states of the network such as frequency changes, rapid power changes and the like.

The subterranean solution is adapted to the site, and it is envisaged to make full use of the extracted rock to produce valuable building materials for the construction of, for example, transport structures.

· _{Β β β β β β β β β} · · · · · · · · · · · · · · _β · _{β β β}

BRIEF DESCRIPTION OF THE DRAWINGS

The enclosed letters show pictures and legend.

The figure for the annotation shows the overall disposition of the layout of individual objects of the underground pumped storage power plant.

FIG. 1 The overall layout of the layout of individual buildings of the underground pumped storage plant.

FIG. 2 Detailed representation of underground structures

FIG. 3 Underground objects - top and bottom view

FIG. 4 Engine room with interior fittings, transformer substation with interior fittings, corridor and access hall with interior fittings

FIG. 5 Francis turbine in built-up area

FIG. 6 Francis turbine unit mounted in frame

FIG. 7 The Francis turbine unit in section, in the bottom view, is visible

Control and mechanical distribution of the guide vanes control and method of establishing the tightness of seals

DETAILED DESCRIPTION OF THE INVENTION

The basic element of the underground pumped-storage power plant 1 is the upper water tank 2 of one of the existing large waterworks or natural water reservoirs, where the treatment for water drainage through the screen 3 and safety barriers 4 is provided, including the plate closure 5 where the water is led through the supply line 6 at an incline below the natural surface for a suitable distance, or otherwise, and then vertically, or gravitationally, to the engine room 7, to the pumping_French turbine aggregate 8.

The basic subassemblies of the pumping Francis turbine aggregate 8 at the underground pumping station 1 are a ball valve 9, a pumping Francis turbine 10 and a motor generator 11 which are housed in the frame 12.

The ball valve 9 is actuated by a rotary actuator 13 via a compensating clutch 14. The pumped Francis turbine 10 is flange-connected to the ball valve 9, then a distributor ring 15 is connected, the inner part of which is annular guide blades 16 whose arms 17 are connected by rods 18, wherein one of them, the arm of the drive 19 is elongated and pivotally connected to the linear hydropower 20, on the opposite side attached to the distributor ring 15.

Another essential component of the transfer Francis turbine 10 is an impeller 21 rigidly connected to a vertical shaft 22 sealed by a seal 23, the establishment of which is accomplished by a pair of linear rotary drives 24, each comprising a globoid slug 25 engaging a tightening nut with a gear 26. 23 of the transfer Francis turbine 10 is rotatably mounted in the frame 12 in the bearings 27 and is connected to the electric motor generator H by means of a start coupling 28. 31 and opens to the first interconnecting tunnel 32, from where it flows into individual fields 33 of the underground tank 34, which is connected to the surface atmosphere by ventilation shafts 35 with an outlet to the ventilation building 36. Next to the hall of the engine room 7 is located a transformer station hall 31 with transformers 37 connected to the engine room 7 by a corridor 38 on their lower floor, with an access tunnel 39 leading into their upper floor, which is led in the opposite direction to the surface into the space of the shaft tower 40. The upper floor of corridor 38 is extended to the first interconnecting tunnel 32 through the access corridor 44. The mobile interconnected engine rooms 7 and the transformer station 31 with the surface are enabled by the access tunnel 39 and at the opposite end of the surface opening into the shaft tower 40.

The bottom of the underground tank 34 is located above the upper level of the impeller 21 of the pumped-off Francis turbine 10 so that the turbine 10 is still congested, thus allowing the opposite process of power generation where the motor generator 14 operates in motor mode. into the upper water tank 2, thereby also achieving the required energy storage.

The power line 42 in the inlet line 6, the pumping Francis turbine 10 aggregates 8, and the waste line 31 may be multiplied to increase power, in our case of the particular solution these branches are multiplied at the bottom into two branches.

Next to the engine room 2 is a transformer station hall 36, which is connected to the engine room 2 by a corridor 38, into which an access tunnel 39 opens.

feature

The underground pumped storage power plant 1 preferably utilizes one of the existing upper large water reservoirs 2, then it is possible to use the natural terrain, and only then r is appropriate to create a space for the underground reservoir 34 at the necessary depth to increase the pressure on the turbine 10. 2, at the appropriate location, adjustments are made for the installation of the screens 3, the safety barriers 4 and the sheet closure 5, from where the supply line 6 first follows the ground surface and after reaching the maximum height difference the supply line 6 is rotated at a steep or oblique angle the maximum possible depth is achieved with the maximum pressure increase as short as possible.

The inlet pipe 6, the diameter of which is optimized for the lowest possible losses, flows into the machine room 2. The pressurized water passes through the ball valve 9 with a secured

the safety shut-off guard represented by the rotary drive 13 acting through the compensating clutch 14, and after passing the pressurized water through the guide blades 16 of the guide ring 15 and the impeller 21 of the pumping Francis turbine 10 reaches the waste line 30 from there from which it is distributed to the individual fields 33 of the underground tank 34, the filling of which is made possible by the existence of a ventilation shaft 35 with a surface outlet into the ventilation object 36. Power control of the pumping Francis turbine 10 is enabled by adjusting the guide vanes 16 whose synchronization is performed by connecting rods 18 on the arms. 17, which are part of the blades 16. One of the arms - the arm 16 is extended, and is controlled by a linear hydraulic drive 20, pivotally mounted on the distributor ring 15.

The transfer turbine 10 is mounted in a solid frame 12 and consists of a ball valve 9 and its accessories, flange-mounted by the transfer ring 15 of the transfer turbine 10, in which the impeller 21 is fixedly connected to the vertical shaft 22. the lower part of which are seals 23 against a water-compressed tightening nut with toothing controlled by globoid slugs 25 which are part of a pair of rotary drives 24. The vertical shaft 22 is rotatably supported in the frame 12 by bearings 27 and is followed by a start clutch 28 as input and protective motor generator element IL ·

The aggregate 8 of the pumping Francis turbine 10 is located in the hall of the engine room 7, next to which is the transformer station hall 31 with transformers 37, connected to the machine room 7 through a corridor 38 into which the access tunnel 39 opens on the upper floor. the upper floor of the corridor 38 forms an access corridor 41, allowing the halls of the engine room 7 and the transformer station 31 to be connected to the underground tank 34 to allow for inspection, cleaning, repairs, etc.

The machinery hall 7 and the transformer station 31 are mobile with the terrain surface connected through the access tunnel 39 and on the other side - on the surface of the mouth to the shaft tower 40.

• ·

The bottom of the underground tank 34 is located above the upper level of the impeller 21 of the pumped-off Francis turbine 10 so that the turbine is still flooded, thus allowing the opposite process of power generation, where the motor generator 11 operates in motor mode. water tank 2, thereby providing the required energy storage.

In order to increase the overall power capacity, the branches, supply line 6, pumping Francis turbine 10 and waste line 30 can be multiplied by these branches, as in our particular case, at the bottom they are multiplied to two branches.

• · «·

Industrial usability

The invention can be applied wherever there is a need for fast and accurate electricity supply to the public electricity grid, which is particularly necessary in areas of nuclear power plants whose power is difficult to control, and in areas with increased production of renewable electricity, such as e.g. wind, sun and the like, and ultimately in areas with increased electricity consumption.

A particular benefit of the invention is the possibility of constructing the proposed pumped storage systems in a landscape without height differences, with the advantage of using especially large waterworks as top retention tanks, advantageously utilizing excavated rocks suitable for construction purposes, furthermore system and with the advantage of significantly expanding the number of sites where pumped storage systems can be built.

Claims (7)

PATENT CLAIMS 1. Underground pumped-storage power plant formed from a reservoir of one of the existing large waterworks, where water treatment is carried out through the technological units of the input supply and safety elements into the working space with the engine room of the power plant containing pumped-storage Francis turbine and transformer station for electricity comprising operating access, ventilation and securing technology elements, characterized in that the working water medium supply comprising the inlet and securing elements to the working space is formed and guided by screens (3), a safety barrier (4) and a sheet closure (5) through the supply piping (6) into the engine room (7), where the pumping Francis turbine (10) unit (8) is connected to the engine room (7), which is connected to the waste pipe (30) leading to the interconnecting tunnel (32) p (33) of an underground tank (34), wherein the tunnel (32) is connected to the surface atmosphere by ventilation shafts (35), the engine room (7) is further connected to a corridor (38) with a transformer station (31) hall with transformers ( 37), where an access tunnel (39) connecting the engine room (7) and the transformer station (31) is connected to the transformer station hall (31), and which is led to the surface of the shaft tower (40) in the opposite direction. it is extended to the interconnecting tunnel (32) by an access corridor (41), so that the engine room hall (7) is connected by this access corridor (41) and the adjoining ascending vent shaft (35) to the vent object (36). Underground pumped storage power plant according to claim 1, characterized in that the Francis pumped storage turbine (10) of the underground pumped storage power station (1) is formed by a ball valve (9), a pumped Francis turbine (10) and a motor generator (11). The ball valve (9) is fitted with a rotary actuator (13), and is connected to a pumping Francis turbine (10), which is connected to the ball valve (9), and then connects to the distributor. a ring (15) in which the guide vanes (16) are arranged, the arms (17) of which are connected by means of rods (18), the pumping Francis turbine (10) further comprising an impeller (21) firmly connected to the vertical shaft (22) a sealed packing (23), fitted with a pair of linear rotary drives (24), each comprising a globoid slug (25) engaging a toothed nut (26) The vertical shaft (22) of the transfer Francis turbine (10) is rotatably mounted in the frame (12) in the bearings (27) and is connected via a start coupling (28) to the electric motor generator (11), (10) axially adjoins the drain pipe elbow (29). Underground pumped-storage power plant according to claim 1 or 2, characterized in that the arms (17) comprise a drive arm (19) which is elongated and pivotally connected to a linear hydraulic drive (20) on the opposite side mounted on the distributor ring (17). 15). Underground pumped-storage power plant according to claim 1 or 2, characterized in that the bottom of the underground tank (34) is located above the upper level of the impeller (21) of the pumped-over Francis turbine (10) to constantly overload the working turbine. Underground pumped storage power plant according to claim 1 or 2, characterized in that the ventilation well (35) opens into the ventilation object (36). Underground pumped-storage power plant according to claim 1 or 2, characterized in that the supply line (6), the Francis turbine transfer unit (10) and the discharge line (30) form a power branch (42). Underground pumped storage power plant according to claim 1 or 2, characterized in that the power branches (42) are more than one.