A storage power generation system and method

Abstract

A storage-type power generation system includes at least two sets of power generation modules and a water pipe. The power generation modules have different heights. Each power generation module includes several pools, each pool equipped with a float and a generator, with the generator located above the pool. The float has a density less than that of water and drives the generator's input shaft to rotate via a drive mechanism. The upstream and downstream ends of the water pipe are connected to a pressurized water source, with the pressure of the upstream water source being greater than that of the downstream water source. A first valve and a second valve are respectively installed at the upstream and downstream ends of the water pipe. Each pool of the power generation module is connected in parallel to the water pipe via a connecting pipe, and each connecting pipe is equipped with a third valve. This invention has a simple structure, flexible layout, and adapts to the utilization of water potential energy in various terrains.

Description

Technical Field

[0001] This invention relates to the field of power generation, and in particular to a storage-type power generation system and method. Background Technology

[0002] Hydropower is a clean and renewable energy source that converts the potential energy of water into electrical energy. It is characterized by low pollution and renewability. my country has abundant hydropower resources. Currently used hydropower stations generate electricity by releasing water from the reservoir during peak electricity demand periods to drive the generator impeller, and by pumping water from the reservoir during off-peak periods to store the liquid level.

[0003] This way of working has the following limitations: 1. Conditional: Two reservoirs with different elevations must be set up to convert electrical energy into potential energy by utilizing the difference in elevation between the water inlet and outlet. 2. Inefficiency: The conversion efficiency is not high, only utilizing the gravitational potential energy of water to convert electrical energy once, and the conversion efficiency is about 70%. 3. Restrictions: Due to natural conditions such as mountainous terrain, implementation can only be carried out in locations with suitable conditions.

[0004] Therefore, how to design a scheme that can efficiently utilize water potential energy to generate electricity is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One of the objectives of this invention is to address the shortcomings of existing technologies by providing a storage-type power generation system that is simple in structure, flexible in layout, and adaptable to the utilization of water potential energy in various terrains.

[0006] The second objective of this invention is to provide a method for generating electricity using the aforementioned energy storage power generation system, which is simple and convenient to operate and can efficiently utilize water potential energy for power generation. One of the technical solutions to achieve the objective of this invention is: an energy storage power generation system, comprising at least two sets of power generation modules and a water pipe. The height of each set of power generation modules is different. Each power generation module includes several pools, each pool is equipped with a float and a generator, and the generator is located above the pool. The density of the float is less than that of water, and the float drives the input shaft of the generator to rotate through a drive mechanism. The upstream and downstream ends of the water pipe are connected to a pressure water source, and the pressure of the pressure water source at the upstream end is greater than that at the downstream end. The upstream and downstream ends of the water pipe are respectively equipped with a first valve and a second valve. Each pool of the power generation module is connected in parallel to the water pipe through a connecting pipe, and each connecting pipe is equipped with a third valve.

[0007] The power generation module has several cells arranged in a matrix on the same horizontal plane.

[0008] The upper end of the float is open and sealed by a cover. A counterweight is provided inside the float, and the counterweight is water and / or sand and / or soil.

[0009] The driving mechanism is a sprocket and chain mechanism. The two sprockets of the sprocket and chain mechanism are located on the same vertical line. The float is hinged to the chain. The sprocket at the higher point drives the input shaft of the corresponding generator to rotate.

[0010] The driving mechanism is a rack and pinion mechanism, with the float hinged to the rack, and the gear drives the input shaft of the corresponding generator to rotate.

[0011] The float is fitted with the inner wall of the corresponding pool body with a clearance; the float and the inner wall of the corresponding pool body are guided by a guide wheel and guide rail, and a braking mechanism is provided on the guide wheel.

[0012] The upstream end of the water pipe is connected to the bottom of the upstream dam, and the downstream end of the water pipe is connected to the bottom of the downstream dam.

[0013] A water pump is installed on the water pipe, located between each group of power generation modules.

[0014] The second technical solution to achieve the objective of this invention is: a power generation method using any of the above-mentioned energy storage power generation systems, comprising the following steps: 1) Open the first valve to allow pressurized water to enter the water pipe. Open the third valve on the high-level power generation module pool to allow pressurized water to enter the pool of the high-level power generation module. The float of the high-level power generation module rises under the action of buoyancy and drives the generator of the high-level power generation module to generate electricity for the first time through the drive mechanism. 2) Close the first valve and open the third valve on the low-level power generation module pool. The pressurized water in the high-level power generation module pool flows out through the water pipe. The float of the high-level power generation module descends under the action of gravity and drives the generator of the high-level power generation module to generate electricity for the second time through the drive mechanism. 3) Pressurized water enters the pool of the low-level power generation module, and the float of the low-level power generation module rises under the action of buoyancy, which drives the generator of the low-level power generation module to generate electricity for the first time through the drive mechanism. 4) Open the second valve, and the pressurized water in the pool of the low-level power generation module flows out through the water pipe. The float of the low-level power generation module descends under the action of gravity, and drives the generator of the low-level power generation module to generate electricity for the second time through the drive mechanism.

[0015] Step 1) The third valves of the high-level power generation module are opened sequentially, or in multiple groups. Step 2) The third valves of the low-level power generation module are opened sequentially, or in multiple groups.

[0016] The above technical solution has the following beneficial effects: 1. The energy storage power generation system includes at least two sets of power generation modules and a water pipe. The heights of the power generation modules are different, meaning there is a height difference between different sets of power generation modules. Each power generation module includes several pools, each equipped with a float and a generator. The generator is located above the pool. The density of the float is less than that of water, and the float drives the input shaft of the generator to rotate via a drive mechanism. The float is subjected to gravity and buoyancy within the pool. When water is added to the pool, the buoyancy force on the float is greater than its gravity, causing the float to move upwards. This linear motion can be converted into rotational motion by the drive mechanism, driving the corresponding generator input shaft to rotate and generate electricity. After the water in the pool is drained, the float moves downwards with the drop in liquid level. This linear motion can be converted back into rotational motion by the drive mechanism, driving the corresponding generator input shaft to rotate and generate electricity again. Both the upstream and downstream ends of the water pipe are connected to a pressure water source, and the pressure of the pressure water source at the upstream end is greater than that at the downstream end. Under the action of gravity, the pressure water source at the upstream end can be discharged to the pressure water source at the downstream end through the water pipe (water discharge), or the pressure water source at the downstream end can be pumped to the pressure water source at the upstream end through the water pipe by a water pump (water pumping). The upstream and downstream ends of the water pipe are equipped with a first valve and a second valve, respectively. Each pool of the power generation module is connected in parallel to the water pipe through a connecting pipe, and each connecting pipe is equipped with a third valve. By opening the first or second valve and the corresponding third valve, water can be injected into the high-level power generation module pool during the water discharge or pumping process, causing the corresponding float to rise, or the pressurized water source in the high-level power generation module pool to be discharged, causing the corresponding float to fall. Similarly, water can be injected into the low-level power generation module pool, causing the corresponding float to rise, or the pressurized water source in the low-level power generation module pool to be discharged, causing the corresponding float to fall. This allows both the high-level and low-level power generation modules to generate electricity twice during a single water discharge or pumping process, effectively improving the utilization rate during water discharge or pumping, especially the utilization rate of water potential energy during water discharge. Furthermore, the high-level and low-level power generation modules can be set according to the actual terrain and precipitation environment, exhibiting broad adaptability.

[0017] 2. The upper end of the float is open and sealed by a cover. A counterweight is installed inside the float. The counterweight is water and / or sand and / or soil. The density of the float can be adjusted by adjusting the weight of the counterweight, so that the float can rise or fall normally in the pool and drive the drive mechanism to generate electricity.

[0018] 3. A water pump is installed on the water pipe between each group of power generation modules. During off-peak hours, the water pump can be turned on and the second valve can be opened to pump the downstream pressurized water source into the pool of the low-level power generation module, the pool of the high-level power generation module, and the upstream pressurized water source for energy storage.

[0019] 4. The power generation method of this invention first raises the height of the high-level power generation module float during the water release process, driving the corresponding generator to generate electricity for the first time. Then, the pressurized water source in the high-level power generation module is released, the float descends, driving the corresponding generator to generate electricity for the second time. The pressurized water source released by the high-level power generation module is sent to the low-level power generation module, raising the height of the low-level power generation module float, driving the corresponding generator to generate electricity for the first time. Then, the pressurized water source in the low-level power generation module is released and sent to the downstream pressurized water source to achieve normal water release, and drives the corresponding generator to generate electricity for the second time. This process is repeated, so that four power generations are achieved in a single water release. By arranging multiple energy storage power generation systems or controlling appropriate specifications and dimensions, the utilization rate of water potential energy can be effectively improved while meeting the normal water release requirements of the upstream pressurized water source (upstream reservoir).

[0020] 5. The power generation method of the present invention opens each of the third valves of the high-level power generation module sequentially or in groups, so that the amount of water entering the pool of the high-level power generation module at one time is sufficient, and the liquid level rises quickly enough to meet the power generation needs of the corresponding generator. Similarly, the liquid level drop rate of the high-level power generation module and the liquid level rise and fall rate of the low-level power generation module are sufficiently large to meet the power generation needs of the corresponding generator.

[0021] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0022] Figure 1 This is a structural layout diagram of the present invention; Figure 2 This is a schematic diagram of the structure of the pool body of the present invention.

[0023] In the attached diagram, 1 is the power generation module, 2 is the water pipe, 3 is the pool body, 4 is the float, 5 is the generator, 6 is the drive mechanism, 7 is the connecting pipe, 8 is the water pump, a is the first valve, b is the second valve, and c is the third valve. Detailed Implementation Example 1

[0024] See Figure 1 and Figure 2The energy storage power generation system includes at least two sets of power generation modules 1 and a water pipe 2. The height of each set of power generation modules is different. For ease of understanding, in this embodiment, the number of power generation modules is designed to be two sets. Of course, the number of power generation modules can be designed to be multiple. It is located between the upstream reservoir and the downstream reservoir. The downstream reservoir can also be selected as the river section downstream of the dam. The power generation module 1 includes ten pools 3 arranged in a row. The pools of the same group of power generation modules are located on the same horizontal plane. The pools are usually designed as square pools, but they can also be designed as other shapes, such as round pools. Each pool 3 is equipped with a float 4 and a generator 5, and the generator 5 is located above the pool 3. Obviously, the shape of the float is adapted to the shape of the pool, forming a gap fit. In order to ensure the stability of the float's movement in the pool, the float 4 and the inner wall of the corresponding pool 3 are guided by guide wheels and guide rails. Specifically, at least two guide rails extending vertically are set on the inner wall of the pool, and guide wheels are set on the surface of the float. The guide wheels are equipped with a braking mechanism. The guide wheels and guide rails cooperate to restrict the float's movement in the vertical direction. To facilitate control of the movement of the float, the upper end of the float 4 is open and sealed by a cover. A counterweight is installed inside the float 4. The counterweight is water and / or sand and / or soil. The density of the float can be controlled by controlling the amount of counterweight, but the density of the float 4 needs to be kept less than the density of water. The float 4 drives the input shaft of the generator 5 to rotate via the drive mechanism 6. Specifically, the generator is supported above the pool by a column. Typically, to reduce the number of columns, two adjacent pools are designed as a group, with the columns positioned between the pools. The corresponding two generators are mounted on the top of the column. In this embodiment, the drive mechanism 6 is a sprocket and chain mechanism. The two sprockets of the sprocket and chain mechanism are located on the same vertical line. The sprocket at the higher position is circumferentially fixed on the input shaft of the corresponding generator, while the sprocket at the lower position is mounted on the lower part of the inner wall of the pool. The float is hinged to the chain, and the sprocket at the higher position drives the input shaft of the corresponding generator to rotate. Of course, the drive mechanism can also be a rack and pinion mechanism. When a rack and pinion mechanism is used, the float is hinged to the rack, and the gear is circumferentially fixed on the input shaft of the corresponding generator, driving the input shaft of the corresponding generator to rotate. Both the upstream and downstream ends of the water pipe 2 are connected to a pressurized water source, with the pressure of the upstream pressurized water source being greater than that of the downstream pressurized water source. Specifically, the upstream end of the water pipe is connected to the bottom of the upstream reservoir dam, and the downstream end is connected to the downstream reservoir. A first valve a and a second valve b are respectively installed at the upstream and downstream ends of the water pipe 2. A water pump 8 is installed on the water pipe 2, located between the two sets of power generation modules. Each pool of the power generation module 1 is connected in parallel to the water pipe 2 via a connecting pipe 7, and each connecting pipe 7 is equipped with a third valve c. Example 2

[0025] When releasing water, the power generation method of the energy storage power generation system described in Example 1 includes the following steps: 1) Open the first valve, and the water (with pressure) in the upstream reservoir enters the water pipe. Then, open the third valves on the high-level power generation module pool in sequence, so that the pressurized water enters the pool of the high-level power generation module in sequence. The float of the high-level power generation module rises under the action of buoyancy, and drives the generator of the high-level power generation module to generate electricity for the first time through the drive mechanism. 2) Close the first valve and open the third valve on the low-level power generation module pool in sequence. The water in the high-level power generation module pool flows out through the water pipe. The float of the high-level power generation module descends under the action of gravity and drives the generator of the high-level power generation module to generate electricity for the second time through the drive mechanism. 3) The water flowing out of the high-level power generation module enters the pool of the low-level power generation module. The float of the low-level power generation module rises under the action of buoyancy, and drives the generator of the low-level power generation module to generate electricity for the first time through the drive mechanism. 4) Open the second valve, and the water in the low-level power generation module pool flows out through the water pipe and enters the downstream reservoir. The float of the low-level power generation module descends under the action of gravity, and drives the generator of the low-level power generation module to generate electricity for the second time through the drive mechanism. Example 3

[0026] When pumping water, the energy storage method of the energy storage power generation system described in Example 1 is used, including the following steps: 1) The guide wheel's braking mechanism locks the guide wheel, the first valve and the second valve are opened, and the water pump is started to pump water from the downstream reservoir to the upstream reservoir. During the pumping process, water sequentially enters each pool of the low-level power generation module, causing each float of the low-level power generation module to float upwards and store energy. Then, it sequentially enters each pool of the high-level power generation module, causing each float of the high-level power generation module to float upwards and store energy. After pumping is complete, the second valve is closed. Before releasing water from the upstream reservoir, the guide wheel is released, and the floats of each power generation module rise to generate electricity for the first time. Then, the second valve is opened to release the water from the power generation module, and the floats of each power generation module descend to generate electricity for the second time. The first valve is then opened, and water is released from the upstream reservoir, switching to the working mode of Example 2.

Claims

1. A storage-type power generation system, characterized in that: Includes at least two sets of power generation modules (1) and water pipes (2), with each set of power generation modules having a different height. The power generation module (1) includes several pools (3), each pool (3) is equipped with a float (4) and a generator (5), and the generator (5) is located above the pool (3). The density of the float (4) is less than that of water, and the float (4) drives the input shaft of the generator (5) to rotate through a drive mechanism (6). The upstream and downstream ends of the water pipe (2) are connected to a pressure water source, and the pressure of the pressure water source at the upstream end is greater than that at the downstream end. The upstream and downstream ends of the water pipe (2) are respectively equipped with a first valve (a) and a second valve (b). Each pool of the power generation module (1) is connected in parallel with the water pipe (2) through a connecting pipe (7), and each connecting pipe (7) is equipped with a third valve (c).

2. The energy storage power generation system according to claim 1, characterized in that: The power generation module (1) has several pools arranged in a matrix on the same horizontal plane.

3. The energy storage power generation system according to claim 1, characterized in that: The upper end of the float (4) is open and sealed by a cover. A counterweight is provided inside the float (4), which is water and / or sand and / or soil.

4. The energy storage power generation system according to claim 1, characterized in that: The drive mechanism (6) is a sprocket and chain mechanism. The two sprockets of the sprocket and chain mechanism are located on the same vertical line. The float is hinged to the chain. The sprocket at the high point drives the input shaft of the corresponding generator to rotate.

5. The energy storage power generation system according to claim 1, characterized in that: The drive mechanism (6) is a gear and rack mechanism, in which the float is hinged to the rack, and the gear drives the input shaft of the corresponding generator to rotate.

6. The energy storage power generation system according to claim 1, characterized in that: The float (4) is fitted with the inner wall of the corresponding pool body (3) with a clearance; the float (4) and the inner wall of the corresponding pool body (3) are guided by a guide wheel and guide rail, and a braking mechanism is provided on the guide wheel.

7. The energy storage power generation system according to claim 1, characterized in that: The upstream end of the water pipe (2) is connected to the bottom of the upstream dam, and the downstream end of the water pipe (2) is connected to the bottom of the downstream dam.

8. The energy storage power generation system according to claim 1 or 7, characterized in that: A water pump (8) is installed on the water pipe (2) and located between each group of power generation modules.

9. A power generation method using any one of the energy storage power generation systems according to claims 1-7, characterized in that, Includes the following steps: 1) Open the first valve to allow pressurized water to enter the water pipe. Open the third valve on the high-level power generation module pool to allow pressurized water to enter the pool of the high-level power generation module. The float of the high-level power generation module rises under the action of buoyancy and drives the generator of the high-level power generation module to generate electricity for the first time through the drive mechanism. 2) Close the first valve and open the third valve on the low-level power generation module pool. The pressurized water in the high-level power generation module pool flows out through the water pipe. The float of the high-level power generation module descends under the action of gravity and drives the generator of the high-level power generation module to generate electricity for the second time through the drive mechanism. 3) Pressurized water enters the pool of the low-level power generation module, and the float of the low-level power generation module rises under the action of buoyancy, which drives the generator of the low-level power generation module to generate electricity for the first time through the drive mechanism. 4) Open the second valve, and the pressurized water in the pool of the low-level power generation module flows out through the water pipe. The float of the low-level power generation module descends under the action of gravity, and drives the generator of the low-level power generation module to generate electricity for the second time through the drive mechanism.

10. The power generation method according to claim 9, characterized in that, Step 1) The third valves of the high-level power generation module are opened sequentially, or in multiple groups. Step 2) The third valves of the low-level power generation module are opened sequentially, or in multiple groups.

Images