An energy management system based on efficient utilization of water energy

Abstract

The present invention discloses an energy management system based on efficient utilization of water energy, including an energy pool, an energy storage structure, an energy conversion system and a pipeline system. When electricity consumption is low, the system uses a water pump to inject water into the energy storage structure with excess electricity, converts electrical energy into water energy and stores it, and then drives the motor to generate electricity through the energy conversion system during peak electricity consumption, converting water energy into electrical energy and transmitting it to the power grid. The present invention has a simple structure, good scalability, and is not restricted by geographical location; the energy unit's lifting energy storage and lowering power generation are achieved by the same motor, without the need for additional energy consumption; the power generation efficiency can reach more than 95%, and the maintenance cost is lower than that of chemical energy storage, which is convenient for large-scale promotion and application.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage and power generation, and in particular to an energy management system which converts electrical energy into water energy for storage during low electricity consumption periods and efficiently converts water energy into electrical energy during peak electricity consumption periods. Background Art

[0002] With the development of economy, the improvement of people's living standards, and the growing demand for electricity, the capacity of power grids has been continuously expanded, the structure of electricity consumption has changed greatly, and the peak-to-valley difference of major power grids has been increasing. The contradiction between the peak-to-valley capacity of power grids and the objective peak-to-valley need is very sharp. With the power stations built in the past two years being put into operation, the state's macroeconomic regulation and restrictions on high-energy-consuming enterprises, the problem of lack of peak-to-valley means during the trough period will become more prominent. The common thermal power generation and nuclear power generation do not have a large power regulation capability, and wind power, photovoltaic power generation and other power generation have great uncertainty and discontinuity, resulting in insufficient or excessive power supply.

[0003] In recent years, chemical energy storage technology has flourished, especially lithium battery energy storage technology has been rapidly developed and widely used, and has become the mainstream chemical energy storage method. However, lithium battery energy storage itself also faces challenges in terms of cycle number, safety, cost, etc., and its safety and economy are still insufficient. In contrast, although physical energy storage technology is safe and economical, the commonly used energy storage method is still pumped storage, which is greatly restricted by geographical conditions. More importantly, due to the structural factors of the turbine, the volumetric efficiency, hydraulic efficiency and mechanical efficiency of water are all lost, resulting in a low overall power generation efficiency, which seriously restricts the promotion and application of physical energy storage technology. Summary of the invention

[0004] The purpose of the present invention is to provide an energy management system for efficient utilization of water energy in response to the problems existing in the prior art. The system has a simple structure and high efficiency. When electricity consumption is underestimated, the excess electricity is used to inject water into the energy storage structure through a water pump, and the electrical energy is converted into water energy and stored. When the electricity consumption is at its peak, the energy unit is used to drive the motor to generate electricity, and the water energy is converted into electrical energy and transmitted to the power grid.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] An energy management system based on efficient utilization of water energy comprises an energy pool, an energy storage structure and an energy conversion system, wherein the energy pool is used for storing water, the energy storage structure is arranged above the energy pool, and the energy conversion system is arranged on one side of the energy storage structure; the energy storage structure is composed of at least one partition bin, each partition bin is provided with a plurality of water inlet holes and a plurality of water outlet holes in layers and columns, and the plurality of water inlet holes and the plurality of water outlet holes are opposite to each other; the energy conversion system is provided with a plurality of water inlet holes and each energy conversion system corresponds to a column of water outlet holes, and each energy conversion system comprises a motor, an energy unit and a supporting structure, the motor is arranged at the top of the supporting structure and is connected to the energy unit through a steel wire rope, and the energy unit can move up and down along the supporting structure; a water inlet is arranged at the upper part of one side of the energy unit, and an automatic drainage is arranged at the bottom Water inlet; the water inlet hole is connected to the energy pool through a water inlet pipe and a water pump, a one-way valve is arranged on the water inlet pipe, the water outlet hole is connected with an electronic valve and a contact seal in sequence, a plurality of drain elbows are arranged under the energy unit, each drain elbow pipe opening is directly opposite to the automatic drain outlet of an energy unit, and all drain elbows are connected to the energy pool through the drain pipe; each energy unit can be connected to the water outlet holes at different heights through the contact seal to allow the water in the segmentation bin to flow into the energy unit, when the energy unit contacts the drain elbow, the automatic drain outlet can be pushed open by the drain elbow to connect the energy unit with the drain elbow, and when the energy unit is away from the drain elbow, the automatic drain outlet can be automatically closed; the motor, water pump, one-way valve and electronic valve are all connected to the control system.

[0007] Furthermore, the interior of the partition bin is divided into a plurality of chambers by the partition bin load-bearing walls, the partition bin load-bearing walls are supported by the partition bin support beams, and each chamber is provided with a water inlet and a water outlet.

[0008] Furthermore, the support structure is composed of four right-angle rails, a plurality of circular supports and a plurality of straight supports, and the energy unit is rollingly connected to the right-angle rails.

[0009] Furthermore, each right-angle track is composed of two tracks, and rollers are arranged on the left and right sides and the front and rear sides of the energy unit, and each right-angle track is connected to the rollers on the two sides.

[0010] Furthermore, a water level sensor is provided above the energy unit, and the water level sensor is connected to the control system.

[0011] Furthermore, a sealing gasket is provided at the outlet of the drainage elbow to ensure the sealing of the connection between the energy unit and the drainage elbow.

[0012] Furthermore, a pressure sensor is provided below the sealing pad, and the pressure sensor is connected to a control system.

[0013] Furthermore, a filter is provided at the water inlet of the water inlet pipe.

[0014] Furthermore, the automatic drain outlet includes a drain outlet and a sealing cover and a water-blocking gate connected to the drain outlet. One end of the water-blocking gate is flip-connected to the drain outlet, and the other end is connected to the drain outlet through a spring. When the energy unit is away from the drain bend, the water-blocking gate is automatically retracted under the action of the spring to close the drain outlet.

[0015] Furthermore, the energy conversion system also includes a winch and a pulley block, the motor is connected to the winch, the winch is connected to the pulley block via a wire rope, the pulley block is connected to the energy unit, and the motor can realize the functions of an electric motor and a generator.

[0016] Furthermore, the energy conversion system also includes a rain protection device, which is arranged above the supporting structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The system of the present invention has a simple overall structure, is highly efficient, environmentally friendly, low-cost, has good scalability, and is not restricted by geographical location;

[0019] The energy unit's lifting energy storage and lowering power generation are achieved by the same motor, without additional energy consumption and low cost;

[0020] The power generation efficiency can reach over 95%, which is an efficiency level that other energy storage devices cannot achieve;

[0021] Fewer wearing parts, lower maintenance cost than chemical energy storage, and easier to promote and apply on a large scale;

[0022] 5) The service life of the system of the present invention is generally more than 30 years, which is much higher than that of chemical energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of an energy management system based on efficient utilization of water energy according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the split warehouse structure;

[0025] Figure 3 It is a schematic diagram of the structure of the energy conversion system;

[0026] Figure 4 This is a schematic diagram of the pipeline system structure;

[0027] Figure 5 It is a schematic diagram of the energy unit structure;

[0028] Among them, 1 energy pool, 2 energy storage structure, 3 energy conversion system, 4 pipeline system, 21 top plate, 22 warehouse body, 23 bottom plate, 31 motor, 32 winch, 33 pulley block, 34 energy unit, 35 support structure, 36 expansion bolt, 41 filter, 42 water pump, 43 one-way valve, 44 layered pipeline, 45 drainage elbow, 46 electronic valve, 47 contact seal, 48 sealing gasket, 49 drainage pipe, 50 fixing device, 221 water inlet, 222 split warehouse load-bearing wall, 223 split warehouse support beam, 224 water outlet, 341 water inlet, 342 roller, 343 automatic drain outlet, 351 rain protection device, 352 right-angle track, 353 circular support, 354 straight support. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] like Figure 1 As shown, an energy management system based on efficient utilization of water energy includes an energy pool 1, an energy storage structure 2, an energy conversion system 3 and a pipeline system 4.

[0033] The energy pool 1 is used for storing water, and its capacity is greater than the water storage capacity of the energy storage structure 2 to ensure that the water storage capacity always meets the requirements. The energy pool 1 can utilize natural geographical conditions or be formed by artificial digging on the ground.

[0034] The energy storage structure 2 is arranged above the energy pool 1 , and the energy conversion system 3 is arranged on one side of the energy storage structure 2 .

[0035] The energy storage structure 2 is composed of at least one partition. Each partition, such as Figure 2 As shown, it is modularly cast by a top plate 21, a bin body 22 and a bottom plate 23, wherein a plurality of water inlet holes 221 are designed in layers and rows at the water inlet end of the split bin, and a plurality of water outlet holes 224 are correspondingly arranged at the drainage end.

[0036] The interior of the partition bin is divided into a plurality of chambers by the partition bin load-bearing wall 222 , and the partition bin load-bearing wall 222 is supported by the partition bin support beam 223 . Preferably, each chamber is provided with a water inlet 221 and a water outlet 224 .

[0037] The split bins can be constructed and used separately, and can be prefabricated in a factory, including pouring a top plate 21 and a floor 23 corresponding to their size.

[0038] The energy storage structure 2 can be formed by stacking a number of split bins, the number of which is determined according to the actual capacity. After the split bins are prefabricated in the factory, they can be stacked and installed side by side on site using a crane.

[0039] like Figure 1 , 2 As shown, a plurality of energy conversion systems 3 are provided, and each energy conversion system 3 corresponds to a row of water discharge holes 224 of the energy storage structure 2 .

[0040] like Figure 3 As shown, each energy conversion system 3 includes a motor 31 , a winch 32 , a pulley block 33 , an energy unit 34 , and a support structure 35 .

[0041] The motor 31 is arranged at the upper end of the support structure 35 , and the motor 31 is connected to the winch 32 , and the winch 32 is connected to the pulley block 33 through a wire rope, and the pulley block 33 is connected to the energy unit 34 , and the energy unit 34 can move up and down along the support structure 35 .

[0042] The motor 31 can realize the functions of a motor and a generator, and can switch between the motor mode and the generator mode. The motor is controlled by a frequency converter. In addition, the motor 31 is also provided with a self-locking device, which automatically locks when the motor is powered off.

[0043] The support structure 35 is assembled from standard profiles such as a right-angle track 352, a round support 353, and a straight support 354, and plays a role in supporting and transporting energy. Among them, the energy unit 34 is rollingly connected to the right-angle track 352. The right-angle track 352 is composed of two tracks. The support structure can be modularly installed according to the actual capacity.

[0044] like Figure 5As shown, rollers 342 are provided on the left and right sides and the front and rear sides of the energy unit 34, and each right-angle track 352 is connected to the rollers 342 on two sides at the same time to limit the freedom of the energy unit so that the energy unit can only move up and down along the supporting structure.

[0045] like Figure 3 As shown, a rainproof device 351 is also provided above the support structure 35 to prevent the motor, winch, etc. from being damaged by rain. The support structure 35 is also connected to the energy pool 1 through expansion bolts 36 to ensure the stability of the support structure.

[0046] like Figure 5 As shown, a water inlet 341 is provided at the upper part of one side of the energy unit 34, and an automatic drain outlet 343 is provided at the bottom. In one embodiment, the automatic drain outlet 343 includes a drain outlet and a sealing cover connected to a water retaining door on the drain outlet, one end of the water retaining door is flipped and connected to the drain outlet, and the other end is connected to the drain outlet through a spring.

[0047] A water level sensor is also provided above the energy unit 34 to monitor the water level of the energy unit and feed back the monitored water level signal to the control system.

[0048] The pipeline system 4 is composed of a water inlet pipeline system and a drainage pipeline system. One end of the water inlet pipeline system is connected to the energy pool 1, and the other end is connected to the energy storage structure 2. One end of the drainage pipeline system is connected to the energy conversion system 3, and the other end is connected to the energy pool 1, so that all the water in all energy units flows into the energy pool.

[0049] like Figure 4 As shown, the water inlet pipe system includes a filter 41, a water pump 42, a one-way valve 43 and a layered pipeline 44 connected in sequence, and the layered pipeline 44 is connected to the water inlet hole 221 of the energy storage structure 2. Among them, the filter is used to filter impurities in the water to ensure that the water quality injected into the energy storage structure meets the requirements.

[0050] The drainage pipe system includes an electronic valve 46, a contact seal 47, a plurality of drainage elbows 45 and a drainage pipe 49. The water outlet 224 of the energy storage structure 2 is connected to the electronic valve 46 and the contact seal 47 in sequence. The drainage elbow 45 is arranged below the energy unit 34. The outlet of each drainage elbow 45 faces the automatic drainage port 343 of an energy unit 34. All drainage elbows 45 are connected to the energy pool 1 through the drainage pipe 49.

[0051] The energy unit 34 can be connected to the water outlets 224 at different heights through the contact seal 47 to allow the water in the energy storage structure 2 to flow into the energy unit 34. When the energy unit 34 is lowered to contact the drain elbow 45, the automatic drain port 343 can be pushed open by the drain elbow 45, thereby achieving the connection between the energy unit and the drain elbow, and the water in the energy unit flows into the drain elbow through the automatic drain port, and then flows into the energy pool through the drainage pipe. When the energy unit is away from the drain elbow, the water retaining door of the automatic drain port is automatically retracted under the action of the spring, thereby closing the drain port.

[0052] There are multiple drainage pipes 49, and all pipes can be effectively fixed by the fixing device 50 to ensure the reliability of the pipes during use.

[0053] like Figure 4 As shown, a sealing gasket 48 is also provided at the outlet of the drain elbow 45 to ensure the sealing performance when the energy unit 34 is connected to the drain elbow 45 .

[0054] A pressure sensor is provided below the sealing gasket 48. The pressure sensor is a contact sensor for monitoring the pressure when the sealing gasket contacts the energy unit and feeding back the monitored pressure signal to the control system.

[0055] In addition, the motor 31, the water pump 42, the one-way valve 43 and the electronic valve 46 are all connected to the control system, and their opening and closing are controlled by the control system.

[0056] The working process of the system of the present invention is as follows:

[0057] 1) Energy storage process

[0058] When electricity consumption is low, electricity is obtained from the power grid to drive the water pump 43 to rotate. The water in the energy pool 1 is injected into the energy storage structure 2 through the water inlet pipe system through the filter 41, the one-way valve 43, and the layered pipeline 44, and the water is stored at a certain height to form potential energy for storage. The rotation of the motor 31 drives the winch 32 to rotate, winding the wire rope, and the energy unit 34 is raised along the support structure 35 through the pulley group 33, and all energy units 34 are lifted to the position corresponding to the water outlet 224 at the highest point of the energy storage structure 2, so that the contact seal 47 corresponds to the water inlet 341 of the energy unit 34, and the motor self-locking device is locked, and the energy storage process ends at this time.

[0059] 2) Power generation process

[0060] During peak electricity consumption, the motor 31 is switched to generator mode, and the control system controls the electronic valve 46 to open, allowing the water in the energy storage structure 2 to flow into the energy unit 34 through the contact seal 47. After the water is filled, the water level sensor sends a signal to the control system, and the control system controls the electronic valve 46 to close.

[0061] The motor self-locking device is opened, and the energy unit 34 descends along the support structure 35, driving the wire rope, the pulley block 33, the winch 32, and the motor 31 to generate electricity. When the energy unit 34 descends to contact the drain elbow 45, the automatic drain port 343 is opened under the action of the drain elbow 45, and the water in the energy unit 34 is discharged into the energy pool 1 through the drain elbow 45 and the drain pipe 49. At the same time, when the energy unit 34 contacts the sealing gasket 48 on the outlet of the drain elbow 45, the pressure sensor feeds back a signal to the control system, and the control system controls the motor 31 to lock.

[0062] After all the water in the energy unit 34 is discharged into the energy pool 1, the motor 31 is switched from the generator mode to the motor mode. The rotation of the motor 31 drives the winch 32 to rotate, winding the wire rope, and the energy unit 34 is raised along the support structure 35 through the pulley set 33. When the energy unit 34 rises away from the drainage elbow 45, the automatic drain outlet 343 is automatically closed under the action of the spring.

[0063] According to the water level in the energy storage structure 2 and the amount of energy required by the power grid, the control system can automatically optimize a number of energy units 34 to dock at the corresponding water outlets 224 of the energy storage structure 2 to take water, and repeat the above process, thereby converting the potential energy of the water in the energy storage structure 2 into electrical energy and transmitting it to the power grid, thereby completing the power generation process.

[0064] The overall structure of the system of the present invention is simple, efficient, environmentally friendly, low-cost, has good scalability, and is not restricted by geographical locations; the lifting energy storage and lowering power generation of the energy unit are realized by the same motor, without the need for additional energy consumption and with low cost; a frequency converter is used to control the motor, and with very little energy loss caused by mechanical friction and air resistance, the power generation efficiency can reach more than 95%, an efficiency level that other energy storage devices cannot achieve; there are fewer wearing parts, and the maintenance cost is lower than that of chemical energy storage, which is convenient for large-scale promotion and application; the service life exceeds 30 years, which is much higher than that of chemical energy storage.

[0065] The present invention has been disclosed above with preferred embodiments, but they are not intended to limit the present invention. Any technical solutions obtained by adopting equivalent replacement or equivalent transformation solutions fall within the protection scope of the present invention.

Claims

1. An energy management system based on efficient utilization of water energy, characterized in that: It includes an energy pool, an energy storage structure and an energy conversion system, the energy pool is used to store water, the energy storage structure is arranged above the energy pool, and the energy conversion system is arranged on one side of the energy storage structure; the energy storage structure is composed of at least one split compartment, each split compartment is layered and arranged with multiple water inlet holes and multiple water outlet holes, and the multiple water inlet holes and the multiple water outlet holes are opposite to each other; there are several energy conversion systems, each energy conversion system corresponds to a row of water holes, each energy conversion system includes a motor, an energy unit and a supporting structure, the motor is arranged at the top of the supporting structure and connected to the energy unit through a steel wire rope, and the energy unit can move up and down along the supporting structure; a water inlet is arranged on the upper part of one side of the energy unit, and an automatic drain is arranged on the bottom; the water inlet hole The energy pool is connected via a water inlet pipe and a water pump, a one-way valve is provided on the water inlet pipe, the water outlet is connected with an electronic valve and a contact seal in sequence, a number of drain elbows are provided below the energy unit, each drain elbow is opposite to an automatic drain outlet of an energy unit, and all drain elbows are connected to the energy pool via a drain pipe; each energy unit is connected to the water outlets at different heights via the contact seal to allow water in the segmentation bin to flow into the energy unit, when the energy unit contacts the drain elbow, the automatic drain outlet is pushed open by the drain elbow to connect the energy unit to the drain elbow, and when the energy unit is away from the drain elbow, the automatic drain outlet can be automatically closed; the motor, water pump, one-way valve and electronic valve are all connected to a control system.

2. The energy management system based on efficient utilization of water energy according to claim 1 is characterized in that: The interior of the partition bin is divided into a plurality of chambers by the partition bin load-bearing walls, the partition bin load-bearing walls are supported by the partition bin support beams, and each chamber is provided with a water inlet and a water outlet.

3. The energy management system based on efficient utilization of water energy according to claim 1 is characterized in that: The support structure is composed of four right-angle rails, a plurality of circular supports and a plurality of straight supports, and the energy unit is rollingly connected to the right-angle rails.

4. The energy management system based on efficient utilization of water energy according to claim 3 is characterized in that: Each right-angle track is composed of two tracks. Rollers are arranged on the left and right sides and the front and rear sides of the energy unit, and each right-angle track is connected to the rollers on the two sides.

5. The energy management system based on efficient utilization of water energy according to claim 1, characterized in that: A water level sensor is also provided above the energy unit, and the water level sensor is connected to the control system.

6. The energy management system based on efficient utilization of water energy according to claim 1, characterized in that: The outlet of the drain elbow is provided with a sealing gasket to ensure the sealing of the connection between the energy unit and the drain elbow.

7. The energy management system based on efficient utilization of water energy according to claim 6 is characterized in that: A pressure sensor is arranged below the sealing pad and is connected to a control system.

8. The energy management system based on efficient utilization of water energy according to claim 1, characterized in that: A filter is also provided at the water inlet of the water inlet pipe.

9. The energy management system based on efficient utilization of water energy according to claim 1, characterized in that: The automatic drain outlet includes a drain outlet and a water retaining door with a sealing cover connected to the drain outlet. One end of the water retaining door is flip-connected to the drain outlet, and the other end is connected to the drain outlet through a spring. When the energy unit is away from the drain elbow, the water retaining door is automatically retracted under the action of the spring to close the drain outlet.

10. The energy management system based on efficient utilization of water energy according to claim 1, characterized in that: The energy conversion system also includes a winch and a pulley block. The motor is connected to the winch, the winch is connected to the pulley block via a wire rope, the pulley block is connected to the energy unit, and the motor can realize the functions of an electric motor and a generator.

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