RU2830127C1 - Tidal power plant with increased operating cycle - Google Patents

Abstract

FIELD: hydraulic structures.

SUBSTANCE: tidal power plant with an extended operating cycle comprises dam 1 forming reservoir 3 separated from sea water area 2, a power plant building, standard working gates placed in dam 1, reversible turbines with electric generators, additional hydraulic turbine 4 with electric generator, located in main line 5 passing through dam 1, accumulation tank 6. Tank 6 is located in water area 2, connected to it at low tide level by check valve 7 and is equipped inside in its lower part with rotary gate 8, shutting off the inlet of pipe 9, connecting tank 6 with main line 5 inside dam 1. Gate 8 is connected to the end of cable 10, which by the other end is connected through blocks 11 installed in the upper part of reservoir 6 and dam 1, to float 12. Float 12 and gate 8 are equipped with weights 13 and 14, respectively. Weight 13 is larger.

EFFECT: invention is aimed at increasing the efficiency of the tidal power plant by generating electric power during the period between tides.

1 cl, 1 dwg

Description

The invention relates to hydraulic structures and can be used to increase energy production by using the energy of the tides by increasing the operating time of the hydroelectric power station between tides.

For example, the “Damless Tidal Hydroelectric Power Station” by A. I. Popov is known under Russian Federation Patent No. 2757047, IPC F03B 13/26; F02B 9/08.

This hydroelectric power station contains an additional reservoir mounted on a support in the reservoir area at the upper tide level, a cylindrical overflow tank with a bi-directional White hydraulic turbine, a water storage tank and control mechanisms to control the water flows to the turbine.

The disadvantages of this tidal hydroelectric power plant are the relatively small volume of water that can be accumulated in an additional reservoir placed on the support and, accordingly, the small reserve of hydraulic power that can be converted into electrical energy.

Another disadvantage is the need to use a White turbine, which has a low efficiency in converting hydraulic energy into electrical energy.

Also known is the “Tidal Power Station” by R.S. Tsgoev under Russian patent No. 2525622, IPC E02B 9/08, F03B 13/26.

The tidal power plant contains several water-passing channels with their own hydroturbines and a common generator. All hydroturbines are connected by a single shaft, loaded onto a generator, which is made for the total capacity of all hydroturbines in the group.

The efficiency of this power plant is achieved by reducing the width of the dam and using a generator with greater power and better technical and economic indicators.

Another disadvantage of this device is its low efficiency due to the lack of any additional water storage devices that would expand the range of regulation of the station’s electrical energy production.

Also known is the “Tidal Power Station” by the authors Nedviga Yu. S. and Nedviga N. Yu., according to USSR invention No. 1490223, IPC E02B 9/08.

A tidal power plant contains a dam that forms a reservoir divided by enclosing walls into several basins connected to the water area by deep water conduits, a power plant building with reversible hydroelectric units and gates in turbine conduits, and the station is equipped with a pipeline with switching gates that sequentially connect the basins with turbine conduits.

This device increases the efficiency of the station by expanding the range of regulation of electricity generation by creating several pools with water reserves and alternately releasing water through turbines, which extends the operating cycle of the tidal power station.

The disadvantage of this technical solution is the significant complexity of manufacturing such a dam with pools and the need to automate the process of controlling the gates.

Dams of this kind are designed and built only for new construction, and it is not possible to improve the technical characteristics of existing tidal stations.

The closest technical solution to the claimed invention is the “Tidal power plant with an additional reservoir” by Popov A. I. under Russian patent No. 2796337, IPC F02B 9/08; F03B 13/26.

This tidal hydroelectric power station contains a reservoir located on pontoons in the reservoir area, which is filled by a pumping unit during high tide through a main pipe laid inside the dam.

During low tide, after the water leaves the reservoir through the working turbines, the reservoir on the pontoons is lowered, and the water from it also exits through the turbines into the sea.

The disadvantage of this tidal hydroelectric power plant is the small volume of water accumulated in the reservoir and, consequently, the insignificant additional energy generated by the power plant.

The objective of the proposed invention is to create a universal device that can be used to increase the efficiency of existing tidal stations.

The technical problem solved by the present invention is the creation of a universal device that can be used to increase the efficiency of existing tidal power plants by generating electricity between tides.

The technical result consists in the fact that in a tidal power plant with an extended operating cycle, containing a dam forming a reservoir separated from the sea water area, a power plant building, standard working gates placed in the dam, reversible turbines with electric generators, an additional hydroturbine with an electric generator placed in the main line passing through the dam, a storage tank placed in the sea water area, connected to it at the low tide level by a check valve and equipped inside in its lower part with a rotary gate, blocking the inlet of the pipe connecting the tank with the main line inside the dam, wherein the rotary gate is connected by means of a cable with the other end of the cable through blocks installed in the upper part of the tank and the dam, wherein the float and the rotary gate are equipped with additional weights, wherein the weight of the float is made greater in weight.

The drawing shows a "Long Cycle Tidal Power Plant".

The device comprises a dam 1 forming a reservoir 3 separated from the sea water area 2, a power plant building, standard working gates located in the dam, reversible turbines with electric generators generating electric power in the network (not shown in the drawing), an additional small hydro turbine 4 located in the main line 5 passing through the dam, a storage tank 6 for water located in the sea water area, connected to it at the low tide level by a check valve 7 and equipped inside its lower part with a rotary gate 8 blocking the inlet of a pipe 9 connecting the tank to the main line inside the dam, wherein the rotary gate is connected by means of a cable 10 through blocks 11 installed in the upper part of the tank and the dam with a float 12, and the float and the rotary gate are equipped, respectively, with an additional large weight load 13 and a load 14. The float with the load in the lower zone of the reservoir is placed on a stand 15 of a certain height.

The "extended cycle tidal power plant" works as follows.

The drawing shows the state of the power plant after the end of the low tide.

When the tide comes, water from the water area 2 of the sea through standard working gates enters the reversible turbines with electric generators (not shown in the drawing) and the reservoir 3 accumulates, while the float 12 with the load 13 floats up, the cable 10 moves towards the reservoir 6 and the load 14, descending, closes the rotary valve 8. Simultaneously with the accumulation of water in the reservoir 3, the reservoir 6 is filled with water through the check valve 7.

The operation of the reversible turbines located in the dam and the generation of electric power for the networks by their generators continues until the high tide level is reached. After some time, the ebb process begins, and the water from the reservoir 3 through the reversible turbines generating the main electric power for the networks exits through the standard working gates into the sea water area, and the float 12 with the load 13 begins to descend. After the float 12 reaches the level of the support 15, the cable 10 is pulled by the heavier load 13 and the rotary gate 8 opens. The accumulated water in the reservoir 6 through the pipe 9 enters the main line 5 to the additional hydraulic turbine 4, the electric generator of which (not shown in the drawing) generates additional electric power, and the water that entered the currently dewatered reservoir 3 then flows through the inoperative reversible turbines back into the sea water area 2.

The dimensions of reservoir 6 and, accordingly, the volume of water accumulated in it are calculated by electricity consumers for the time until the next tidal cycle, during which an additional hydro turbine 4 with a generator will operate, producing electricity for the station’s own needs or to supply a small settlement.

Thus, by using the water reserve in an additional reservoir located in the sea area, it is possible to increase the productivity of existing tidal power plants and ensure the supply of electricity for the station’s own needs in the time interval between tides.

Claims (1)

A tidal power plant with an extended operating cycle, comprising a dam forming a reservoir separated from the sea water area, a power plant building, standard working gates located in the dam, reversible turbines with electric generators, an additional hydroturbine with an electric generator located in the main line passing through the dam, a storage tank, characterized in that the storage tank is located in the sea water area, connected to it at the low tide level by a check valve and equipped inside in its lower part with a rotary gate, blocking the inlet of the pipe connecting the tank with the main line inside the dam, wherein the rotary gate is connected to the end of a cable, the other end of which is connected through blocks installed in the upper part of the tank and the dam, to a float, wherein the float and the rotary gate are equipped with additional weights, wherein the weight of the float is made greater in weight.