CN115614246A - Compressed air energy storage method, device and system and electronic equipment - Google Patents
Compressed air energy storage method, device and system and electronic equipment Download PDFInfo
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- CN115614246A CN115614246A CN202211304011.XA CN202211304011A CN115614246A CN 115614246 A CN115614246 A CN 115614246A CN 202211304011 A CN202211304011 A CN 202211304011A CN 115614246 A CN115614246 A CN 115614246A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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Abstract
The application provides a compressed air energy storage method, a device, a system and electronic equipment, wherein the method comprises the following steps: obtaining rated power of a compressed air energy storage system; controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank and a gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline based on the first preset flow of the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline; and after the liquid pump reaches the rated power, inputting the gas in the gas storage cylinder into the second liquid storage tank, and injecting the liquid in the second liquid storage tank into the first liquid storage tank through a liquid conveying pipeline so as to drive the generator to generate power by the liquid pump based on the current power. Through carrying out air compression to the gas bomb, the drive liquid pump rotates with the hydraulic motor state, and then the generator electricity generation that the drive is connected with the liquid pump has reduced the cost demand of energy storage.
Description
Technical Field
The application relates to the technical field of power management, in particular to a compressed air energy storage method, device and system and electronic equipment.
Background
At present, an emergency energy storage system is generally arranged for dam flood discharge equipment in an important large hydropower station so as to ensure that the hydropower station can enter a safe operation mode under the condition of sudden power failure.
In the prior art, a diesel generator or a battery is generally used as an energy storage system. However, the diesel generator needs to consume fossil fuel energy for operation, and the storage battery needs to be manually charged regularly, and both of them have high cost requirements.
Disclosure of Invention
The application provides a compressed air energy storage method, a compressed air energy storage device, a compressed air energy storage system and electronic equipment, and aims to overcome the defects that the cost requirement is high in the prior art and the like.
The first aspect of the application provides a method for storing energy by compressed air, which is applied to a compressed air energy storage system, and the system comprises: liquid pump, first liquid storage pot, second liquid storage pot, gas bomb and generator, the mounted position of first liquid storage pot is higher than the mounted position of second liquid storage pot, first liquid storage pot with be equipped with the infusion pipeline between the second liquid storage pot, the liquid pump is in on the infusion pipeline, the business turn over gas port of second liquid storage pot with be equipped with the gas transmission pipeline between the business turn over gas port of gas bomb, the method includes:
obtaining rated power of the compressed air energy storage system;
controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, and communicating the gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline according to a first preset flow based on the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline;
monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed;
when the temperature change value of the system reaches a preset threshold value, based on the liquid pump, injecting the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline according to a second preset flow, wherein the second preset flow is smaller than the first preset flow, and meanwhile, according to the current pressure of the liquid pump, adjusting the rotating speed of the liquid pump until the liquid pump reaches the rated power;
after the liquid pump reaches the rated power, if an energy storage calling instruction is received, based on the gas transmission pipeline, inputting gas in the gas storage bottle into the second liquid storage tank, and enabling liquid in the second liquid storage tank to be injected into the first liquid storage tank through the liquid transmission pipeline, so that the liquid pump drives the generator to generate electricity based on the current power.
Optionally, the adjusting the rotation speed of the liquid pump according to the current pressure of the liquid pump includes:
acquiring a compression working efficiency characteristic curve of the liquid pump and the current pressure of the liquid pump; the characteristic curve of the compression working efficiency represents the corresponding relation among the pressure, the rotating speed and the compression working efficiency of the hydraulic pump;
determining a target rotating speed corresponding to the current pressure according to the compression working efficiency characteristic curve;
and adjusting the rotation speed of the liquid pump according to the target rotation speed.
Optionally, the determining the target rotation speed corresponding to the current pressure according to the characteristic curve of the compression working efficiency includes:
when the rotating speed change value of the liquid pump in a preset time period does not exceed a preset threshold value, determining the rotating speed correction direction of the liquid pump according to the compression working efficiency of the liquid pump under the current rotating speed and the current pressure, which is represented by the compression working efficiency characteristic curve;
and determining the target rotating speed corresponding to the current pressure according to the rotating speed correction direction of the liquid pump and a preset rotating speed correction scale.
Optionally, the method further includes:
acquiring the pressure of a gas storage bottle, the liquid injection flow of the second liquid storage tank, the torque of the liquid pump and the temperature of a system in the process that the liquid pump runs at the target rotating speed;
determining the current power of the liquid pump according to the pressure of the gas bomb, the liquid injection flow of the second liquid storage tank, the torque of the liquid pump and the system temperature;
and judging whether the liquid pump reaches the rated power or not according to the magnitude relation between the current power and the rated power of the liquid pump.
Optionally, the method further includes:
when the liquid pump reaches the rated power, determining the target rotating speed of the liquid pump according to the rated power and the torque of the liquid pump;
and limiting the rotation speed of the liquid pump according to the target rotation speed.
In a second aspect, the present application provides a compressed air energy storage device for use in a compressed air energy storage system, the system comprising: liquid pump, first liquid storage pot, second liquid storage pot, gas bomb and generator, the mounted position of first liquid storage pot is higher than the mounted position of second liquid storage pot, first liquid storage pot with be equipped with the infusion pipeline between the second liquid storage pot, the liquid pump is in on the infusion pipeline, the business turn over gas port of second liquid storage pot with be equipped with the gas transmission pipeline between the business turn over gas port of gas bomb, the device includes:
the acquisition module is used for acquiring the rated power of the compressed air energy storage system;
the first energy storage module is used for controlling the liquid pump to operate at an initial rotating speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, communicating the gas conveying pipeline, and injecting liquid in the first liquid storage tank into the second liquid storage tank through the liquid conveying pipeline according to a first preset flow rate based on the liquid pump so that gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline;
the monitoring module is used for monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed;
the second energy storage module is used for injecting the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline based on a second preset flow rate of the liquid pump when the temperature change value of the system reaches a preset threshold value, wherein the second preset flow rate is smaller than the first preset flow rate, and the rotating speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power;
and the energy storage calling module is used for inputting the gas in the gas storage bottle into the second liquid storage tank based on the gas pipeline if an energy storage calling instruction is received after the liquid pump reaches the rated power, so that the liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid pipeline, and the liquid pump drives the generator to generate power based on the current power.
A third aspect of the present application provides a compressed air energy storage system comprising: the compressed air energy storage device comprises a liquid pump, a first liquid storage tank, a second liquid storage tank, a gas storage bottle, a generator and the compressed air energy storage device designed according to the second aspect;
the installation position of the first liquid storage tank is higher than that of the second liquid storage tank, a liquid conveying pipeline is arranged between the first liquid storage tank and the second liquid storage tank, the liquid pump is arranged on the liquid conveying pipeline, and a gas conveying pipeline is arranged between a gas inlet and a gas outlet of the second liquid storage tank and a gas inlet and a gas outlet of the gas storage bottle;
the compressed air energy storage device controls the compressed air energy storage system using the method according to the first aspect and various possible designs of the first aspect.
Optionally, an air inlet pipeline is arranged at an air inlet of the second air cylinder, and the air inlet pipeline is communicated with the outside of the system and used for filling external air into the second air cylinder.
A fourth aspect of the present application provides an electronic device, comprising: at least one processor and memory;
the memory stores computer execution instructions;
the at least one processor executes computer-executable instructions stored by the memory to cause the at least one processor to perform the method as set forth in the first aspect above and in various possible designs of the first aspect.
A fifth aspect of the present application provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement a method as set forth in the first aspect and various possible designs of the first aspect.
This application technical scheme has following advantage:
the application provides a compressed air energy storage method, a device, a system and electronic equipment, wherein the method comprises the following steps: obtaining rated power of a compressed air energy storage system; controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank and a gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline based on the first preset flow of the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline; monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed; when the temperature change value of the system reaches a preset threshold value, based on the fact that the liquid pump injects the liquid in the first liquid storage tank into the second liquid storage tank through the liquid delivery pipeline according to a second preset flow, the second preset flow is smaller than the first preset flow, and meanwhile, the rotation speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power; after the liquid pump reaches the rated power, if an energy storage calling instruction is received, gas in the gas storage bottle is input into the second liquid storage tank based on the gas transmission pipeline, so that liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid transmission pipeline, and the liquid pump drives the generator to generate electricity based on the current power. The method that above-mentioned scheme provided, through carrying out air compression to the gas bomb, based on the high-pressure gas of gas bomb output when the energy storage is called, pass through infusion tube and pour into first liquid storage pot with the liquid in the second liquid storage pot, the drive liquid pump rotates with the hydraulic motor state, and then the generator electricity generation that the drive is connected with the liquid pump, whole process not only need consume fossil fuel energy, also need not manual intervention, has reduced the cost demand of energy storage.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a schematic structural diagram of an electric power system on which an embodiment of the present application is based;
FIG. 2 is a schematic flow chart of a compressed air energy storage method according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow diagram illustrating an exemplary method for storing energy from compressed air in accordance with an exemplary embodiment of the present disclosure;
FIG. 4 is a schematic flow chart diagram illustrating another exemplary method of storing energy from compressed air in accordance with an embodiment of the present disclosure;
FIG. 5 is a schematic structural diagram of a compressed air energy storage device according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural diagram of a compressed air energy storage system according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of an exemplary compressed air energy storage system provided by an embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following examples, "plurality" means two or more unless specifically limited otherwise.
In the prior art, a diesel generator or a storage battery is generally used as an energy storage system. But the diesel generator has the defects of high misoperation risk and environmental pollution. The composite emergency power supply system has the advantages that the diesel generator and the battery energy storage system are combined to realize uninterrupted power supply and can supply power for a long time, however, the storage battery pack needs to be charged manually at regular intervals, the emergency that the storage battery pack is completely discharged when sudden power failure of a total station cannot be coped with and power supply cannot be rapidly recovered by other external power sources exists, the capacity life of the storage battery pack is related to the operation time, and even if the time is longer, the capacity can be reduced, and the energy storage cost requirement is increased.
In order to solve the above problems, the compressed air energy storage method, device, system and electronic device provided by the embodiment of the application obtain the rated power of the compressed air energy storage system; controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank and a gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline based on the first preset flow of the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline; monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed; when the temperature change value of the system reaches a preset threshold value, based on the fact that the liquid pump injects the liquid in the first liquid storage tank into the second liquid storage tank through the liquid delivery pipeline according to a second preset flow, the second preset flow is smaller than the first preset flow, and meanwhile, the rotation speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power; after the liquid pump reaches the rated power, if an energy storage calling instruction is received, gas in the gas storage bottle is input into the second liquid storage tank based on the gas transmission pipeline, so that liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid transmission pipeline, and the liquid pump drives the generator to generate electricity based on the current power. According to the method provided by the scheme, the gas storage bottle is compressed by air, high-pressure gas output by the gas storage bottle is used when energy storage is called, liquid in the second liquid storage tank is injected into the first liquid storage tank through the infusion pipeline, the liquid pump is driven to rotate in the state of the hydraulic motor, and then the generator connected with the liquid pump is driven to generate electricity.
The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a configuration of a power system based on the present application will be described:
the compressed air energy storage method, the compressed air energy storage device, the compressed air energy storage system and the electronic equipment are suitable for providing electric energy for an electric power system. As shown in fig. 1, the schematic structural diagram of an electric power system based on the embodiment of the present application mainly includes an electric power dispatching device, a compressed air energy storage system, a compressed air energy storage device, and an electric power consumption device. Specifically, the power dispatching equipment can send power dispatching demand information to the compressed air energy storage device, and the device determines the rated power of the compressed air energy storage system according to the obtained power dispatching demand information, and further correspondingly controls the compressed air energy storage system to generate electric energy and transmit the electric energy to the electric equipment.
The embodiment of the application provides a compressed air energy storage method, be applied to compressed air energy storage system, this system includes the liquid pump, first liquid storage pot, the second liquid storage pot, gas bomb and generator, the mounted position of first liquid storage pot is higher than the mounted position of second liquid storage pot, be equipped with the infusion pipeline between first liquid storage pot and the second liquid storage pot, the liquid pump is on the infusion pipeline, be equipped with the infusion pipeline between the business turn over gas port of second liquid storage pot and the business turn over gas port of gas bomb, the compressed air energy storage method that this application embodiment provided is used for controlling compressed air energy storage system to adopt compressed air's mode energy storage. The main executing body of the embodiment of the present application is an electronic device, such as a server, a desktop computer, a notebook computer, a tablet computer, and other electronic devices that can be used to control a compressed air energy storage system.
As shown in fig. 2, a schematic flow chart of a compressed air energy storage method provided in an embodiment of the present application is shown, where the method includes:
Specifically, power dispatching demand information issued by power dispatching equipment in the power system can be acquired, and then the rated power which needs to be reached by the compressed air energy storage system is determined by analyzing the power dispatching demand information, so that the operation of the compressed air energy storage system can be controlled by taking the rated power as a target.
And 202, controlling the liquid pump to operate at an initial rotating speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, and communicating a gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline according to a first preset flow based on the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline.
In particular, in order to be able to increase the power of the compressed air energy storage system rapidly to the rated power, a higher initial rotational speed can be provided in advance, so that the liquid pump is operated at a higher initial rotational speed. At the moment, the compressed air energy storage system is in an energy storage mode, so that the compressed air energy storage system can be communicated with a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank and a gas conveying pipeline between an air inlet and an air outlet of the second liquid storage tank and an air inlet and an air outlet of the gas storage bottle, at the moment, the first liquid storage tank is an atmospheric pressure liquid storage tank, the second liquid storage tank is a high-pressure liquid storage tank, and because the installation position of the first liquid storage tank is higher than that of the second liquid storage tank, liquid in the second liquid storage tank can be injected into the second liquid storage tank through the liquid conveying pipeline under the action of the liquid pump, and then gas in the second liquid storage tank is input into the gas storage bottle through the gas conveying pipeline in a compressed mode, so that primary energy storage is realized.
The liquid pump can inject the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline at a first preset flow rate according to a first high compression ratio in the process that the liquid pump runs at the initial rotating speed.
And step 203, monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at the initial rotating speed.
It should be noted that, because the power of the compressed air energy storage system is gradually increased and does not reach the rated power value in the process that the liquid pump operates at the initial rotation speed, the liquid pump injects the liquid in the first liquid storage tank into the second liquid storage tank through the liquid delivery pipe at the initial stage of the compressed energy storage according to the first preset flow rate, and the temperature of the compressed air energy storage system is increased due to the heat accumulation along with the progress of the compressed energy storage process.
And 204, when the temperature change value of the system reaches a preset threshold value, based on the fact that the liquid pump injects the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline according to a second preset flow, wherein the second preset flow is smaller than the first preset flow, and meanwhile, the rotation speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power.
Specifically, the temperature change of the compressed air energy storage system can be monitored in real time, and when the system temperature change value of the compressed air energy storage system in a fixed time period reaches a preset threshold value, the compressed air energy storage system is controlled to enter the next stage of compressed energy storage.
Specifically, at the next stage of the compressed air energy storage system, the flow rate of the liquid injected from the first liquid storage tank to the second liquid storage tank can be reduced, that is, the liquid pump can inject the liquid in the first liquid storage tank into the second liquid storage tank through the liquid conveying pipeline at a second lower preset flow rate according to a second lower compression ratio. Meanwhile, the rotating speed of the liquid pump can be adjusted according to the current pressure of the liquid pump based on a converter connected with the liquid pump.
And step 205, after the liquid pump reaches the rated power, if an energy storage calling instruction is received, inputting gas in the gas storage bottle into the second liquid storage bottle based on the gas transmission pipeline, and injecting liquid in the second liquid storage bottle into the first liquid storage bottle through the gas transmission pipeline, so that the liquid pump drives the generator to generate electricity based on the current power.
It should be noted that steps 201 to 204 are the energy storage process of the compressed air energy storage system, and step 205 is the energy release process of the compressed air energy storage system.
Specifically, after an energy storage calling instruction is received, the compressed air energy storage system is controlled to enter an energy release state, a gas transmission pipeline between the gas storage bottle and the second liquid storage tank is communicated in the energy release state, a liquid transmission pipeline between the first liquid storage tank and the second liquid storage tank is communicated, and at the moment, high-pressure gas in the liquid storage bottle is input into the second liquid storage tank through the gas transmission pipeline, so that liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid transmission pipeline under the action of the high-pressure gas, the liquid pump is also driven to enter a hydraulic motor state, the coaxial generator is driven to generate electricity through the current power, and primary energy release is achieved.
For example, as shown in fig. 3, for a flow chart of an exemplary compressed air energy storage method provided in the embodiment of the present application, an emergency power command is first input to indicate a rated power P N And then detecting whether the pressure of the gas storage cylinder reaches the standard, if so, representing that the current energy storage is enough to respond to the emergency power supply power instruction, otherwise, storing energy. Under the condition of reaching the standard, whether an emergency power supply calling instruction (an energy storage calling instruction) is input or not can be monitored in real time, if the emergency power supply calling instruction is received, corresponding energy releasing work is carried out, and meanwhile, energy releasing time t is recorded i+1 ＝t i + Δ t, when accumulated energy release time t i+1 ≥t T When the energy is released, the energy releasing is finished. Wherein, t T Indicating the nominal operating time, t, of the compression-function energy storage system T Can be set according to the emergency power calling instruction.
As a practical way, on the basis of the above embodiment, in an embodiment, the rotation speed adjustment of the liquid pump according to the current pressure of the liquid pump includes:
2041, acquiring a compression working efficiency characteristic curve of the liquid pump and the current pressure of the liquid pump; the compression working efficiency characteristic curve represents the corresponding relation among the pressure, the rotating speed and the compression working efficiency of the liquid pump;
step 2042, determining a target rotating speed corresponding to the current pressure according to the compression working efficiency characteristic curve;
and 2043, adjusting the rotation speed of the liquid pump according to the target rotation speed.
It should be noted that, in the compressed air energy storage process, the pressure of the liquid pump is gradually increased, the power of the liquid pump is gradually increased, and before the rated power is reached, in order to ensure that the pressure, the rotation speed and the compression working efficiency of the liquid pump are matched, the rotation speed can be adjusted according to the current pressure of the liquid pump based on the working efficiency characteristic curve of the liquid pump.
Specifically, in an embodiment, when the variation value of the rotation speed of the liquid pump in the preset time period does not exceed the preset threshold, the rotation speed correction direction of the liquid pump may be determined according to the compression working efficiency of the liquid pump at the current rotation speed and the current pressure, which is characterized by the compression working efficiency characteristic curve; and determining the target rotating speed corresponding to the current pressure according to the rotating speed correction direction of the liquid pump and the preset rotating speed correction scale.
Specifically, in one embodiment, the gas cylinder pressure, the liquid injection flow rate of the second liquid storage tank, the torque of the liquid pump and the system temperature can be obtained during the operation of the liquid pump at the target rotation speed; determining the current power of the liquid pump according to the pressure of the gas storage bottle, the liquid injection flow of the second liquid storage tank, the torque of the liquid pump and the system temperature; and judging whether the liquid pump reaches the rated power or not according to the magnitude relation between the current power and the rated power of the liquid pump.
Further, in one embodiment, a target rotational speed of the liquid pump may be determined based on the rated power and the torque of the liquid pump when the liquid pump reaches the rated power; and limiting the rotation speed of the liquid pump according to the target rotation speed.
Specifically, as shown in fig. 4, a schematic flow chart of another exemplary compressed air energy storage method is provided for the embodiment of the present application, and when the liquid pump is adjusted to rotate, the current rotation speed N of the liquid pump is obtained in real time first k Efficiency η of liquid mixing pump (compression work efficiency) k When the current speed N of the liquid pump k Liquid pump efficiency eta expressed by working efficiency characteristic curve k Corresponding target speed N ref After the pressure p of the gas storage cylinder is equal to the system flow, the liquid injection flow (system flow) Q of the second liquid storage tank and the torque T of the liquid pump are collected p And the system temperature t k And then the liquid injection flow of the second liquid storage tank is determined according to the pressure of the gas storage cylinderThe amount, the liquid pump torque and the system temperature, and the liquid pump power P is calculated. When the power P of the liquid pump reaches the rated power P N Before, judging the rotating speed variation value | N of the liquid pump in a preset time period k -N k-1 Whether | exceeds a preset threshold e N If not, further judging the current system temperature t k Relative initial System temperature (Room temperature) t 0 If the preset temperature difference delta t is higher than the preset temperature difference delta t, the liquid pump is enabled to use the first compression ratio C r1 Injecting the liquid in the first liquid storage tank into the second liquid storage tank through the liquid conveying pipeline at a higher first preset flow rate, and otherwise enabling the liquid pump to compress the liquid at a second compression ratio C r2 And injecting the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline at a second lower preset flow rate. Then according to the relation between the compression working efficiency under the current pressure and the current rotating speed
Determining whether the rotational speed correction direction of the liquid pump is increased or decreased, and if so, determining the target rotational speed N ref ＝N rk + Δ N, if decreasing, determining the target speed N ref ＝N rk - Δ N, Δ N being a preset rotation speed correction scale,
wherein, the rotation speed variation value | N of the liquid pump in a preset time period k -N k-1 L exceeds a preset threshold e N Then the current rotation speed N can be adjusted k Is determined as a target rotational speed N ref I.e. no speed adjustment is performed.
When the liquid pump reaches the rated power, a preset maximum power point tracking control strategy can be adopted to limit the rotating speed of the liquid pump so as to keep the rotating speed at the maximum power point.
Specifically, the maximum power point tracking control strategy may be expressed as the following formula:
it should be noted that, no matter in the energy storage process or the energy release process of the compressed air energy storage system, the rotation speed adjustment mode of the liquid pump is the same, the above embodiment mainly describes a specific implementation mode of rotation speed adjustment of the liquid pump by taking the energy storage process as an example, and the energy release process is not described again.
According to the compressed air energy storage method provided by the embodiment of the application, the rated power of a compressed air energy storage system is obtained; controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank and communicating a gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline based on the first preset flow of the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline; monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed; when the temperature change value of the system reaches a preset threshold value, based on the fact that the liquid pump injects the liquid in the first liquid storage tank into the second liquid storage tank through the liquid delivery pipeline according to a second preset flow, the second preset flow is smaller than the first preset flow, and meanwhile, the rotation speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power; after the liquid pump reaches rated power, if an energy storage calling instruction is received, gas in the gas storage bottle is input into the second liquid storage tank based on the gas transmission pipeline, so that liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid transmission pipeline, and the liquid pump drives the generator to generate electricity based on the current power. According to the method provided by the scheme, the gas storage bottle is compressed by air, high-pressure gas output by the gas storage bottle is used when energy storage is called, liquid in the second liquid storage tank is injected into the first liquid storage tank through the infusion pipeline, the liquid pump is driven to rotate in the state of the hydraulic motor, and then the generator connected with the liquid pump is driven to generate electricity. And the micro-miniature compressed air energy storage technology is applied to the hydropower station, so that the problem of water and electricity consumption in the case of surplus electric power can be effectively solved.
The embodiment of the application provides a compressed air energy storage device, which is used for executing the compressed air energy storage method provided by the embodiment.
Fig. 5 is a schematic structural view of a compressed air energy storage device according to an embodiment of the present disclosure. The compressed air energy storage device 50 includes: the system comprises an acquisition module 501, a first energy storage module 502, a monitoring module 503, a second energy storage module 504 and an energy storage calling module 505.
The acquisition module is used for acquiring rated power of the compressed air energy storage system; the first energy storage module is used for controlling the liquid pump to operate at an initial rotating speed according to rated power, is communicated with a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, is communicated with a gas conveying pipeline, and is used for injecting liquid in the first liquid storage tank into the second liquid storage tank through the liquid conveying pipeline based on a first preset flow of the liquid pump so as to enable gas in the second liquid storage tank to enter the gas storage bottle through the gas conveying pipeline; the monitoring module is used for monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed; the second energy storage module is used for injecting the liquid in the first liquid storage tank into the second liquid storage tank through a liquid conveying pipeline based on the liquid pump according to a second preset flow when the temperature change value of the system reaches a preset threshold value, wherein the second preset flow is smaller than the first preset flow, and the rotating speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power; and the energy storage calling module is used for inputting gas in the gas storage bottle into the second liquid storage tank based on the gas transmission pipeline if an energy storage calling instruction is received after the liquid pump reaches the rated power, so that liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid transmission pipeline, and the liquid pump drives the generator to generate electricity based on the current power.
The specific manner in which the individual modules perform the operations has been described in detail in relation to the embodiment of the method in this embodiment of the compressed air energy storage device and will not be elaborated upon here.
The compressed air energy storage device provided by the embodiment of the application is used for executing the compressed air energy storage method provided by the embodiment, the implementation mode and the principle are the same, and the description is omitted.
The embodiment of the application provides a compressed air energy storage system, which is used for executing the compressed air energy storage method provided by the embodiment.
Fig. 6 is a schematic structural diagram of a compressed air energy storage system according to an embodiment of the present application. The compressed air energy storage system 60 includes: the compressed air energy storage device 50 comprises a liquid pump 601, a first liquid storage tank 602, a second liquid storage tank 603, a gas storage bottle 604, a generator 605 and the compressed air energy storage device provided by the embodiment.
The mounting position of the first liquid storage tank is higher than that of the second liquid storage tank, a liquid conveying pipeline is arranged between the first liquid storage tank and the second liquid storage tank, the liquid pump is arranged on the liquid conveying pipeline, and a gas conveying pipeline is arranged between a gas inlet and a gas outlet of the second liquid storage tank and a gas inlet and a gas outlet of the gas storage bottle; the compressed air energy storage device controls the compressed air energy storage system by adopting the compressed air energy storage method provided by the embodiment.
Specifically, in one embodiment, the air inlet of the second liquid storage tank is provided with an air inlet pipeline, and the air inlet pipeline is communicated with the outside of the system and used for filling the second liquid storage tank with external air.
Specifically, as shown in fig. 7, a schematic structural diagram of an exemplary compressed air energy storage system provided for the embodiment of the present application is applied to supply electric energy to a dam gate, and the system further includes a turbine set, a transmission, a transformer and a dam gate. The liquid conveying pipeline arranged between the first liquid storage tank and the second liquid storage tank is divided into a first liquid conveying pipeline and a second liquid conveying pipeline, the first liquid conveying pipeline is used for conveying liquid from the first liquid storage tank to the second liquid storage tank, the second liquid conveying pipeline is used for conveying liquid from the second liquid storage tank to the first liquid storage tank, and the switch S is arranged 2 And S 4 In the first infusion line, S 2 And S 4 When closed, the first transfusion pipeline is communicated with the switch S 1 And S 3 In the second infusion line, S 1 And S 3 When the second transfusion pipeline is closed, the second transfusion pipeline is communicated. Switch S 5 On the gas pipeline arranged between the gas inlet and outlet of the second liquid storage tank and the gas inlet and outlet of the gas storage bottle S 5 When the valve is closed, the gas pipelines are communicated. Switch S 6 On the air inlet pipe of the second liquid storage tank S 6 When closed, the air inlet pipeline is communicated.
Wherein, to compressed air energy storage systemAnd in the energy storage stage, when the turbine set does not receive an energy storage calling instruction, the transmission is driven, the transmission drives the liquid pump, and the working state of the liquid pump is the hydraulic pump at the moment. In particular the controllable switch S 2 、S 4 、S 5 Closed, switch S 1 、S 3 、S 6 And (5) disconnecting. At the moment, the first liquid storage tank is a normal-pressure liquid storage tank, the second liquid storage tank is a high-pressure liquid storage tank, liquid in the first liquid storage tank flows into the second liquid storage tank under the action of the hydraulic pump, so that gas in the second liquid storage tank is pressed into the gas storage bottle, and primary energy storage is realized. Switch S 2 、S 4 、S 5 Open, switch S 1 、S 3 、S 6 And (5) closing. The liquid in the second liquid storage tank is pumped back into the first liquid storage tank under the action of the liquid pump. Due to S 6 And the second liquid storage tank is communicated with the outside and can be refilled with air to recover the normal pressure state. Can realize continuous energy storage by repeated operation
Aiming at the energy release stage of the compressed air energy storage system, the hydraulic turbine set is separated from the speed changer when receiving an energy storage calling instruction, and hydroelectric power generation is carried out. If an instruction for starting the dam gate emergency power supply is received, high-pressure air in the gas storage cylinder expands to do work to drive the liquid pump to work, and the working state of the liquid pump is a hydraulic motor at the moment, so that the generator is driven to generate electricity. In particular the switch S can be controlled 1 、S 3 、S 5 Closed, switch S 2 、S 4 、S 6 And (4) disconnecting. Liquid in the second liquid storage tank flows into the first liquid storage tank under the action of high-pressure gas in the gas storage cylinder, so that the hydraulic motor is driven to rotate, the coaxial generator is driven to generate electricity, and primary energy release is realized. Switch S 1 、S 3 、S 5 Open, switch S 2 、S 4 、S 6 And (5) closing. The first liquid storage tank and the second liquid storage tank are both communicated with the outside, and the liquid in the first liquid storage tank flows back to the second liquid storage tank based on the action of gravity because the installation position of the first liquid storage tank is higher than that of the second liquid storage tank. The repeated operation can realize continuous energy release.
The compressed air energy storage system provided by the embodiment of the application is used for executing the compressed air energy storage method provided by the embodiment, the implementation mode and the principle are the same, and the description is omitted.
The embodiment of the application provides electronic equipment for executing the compressed air energy storage method provided by the embodiment.
Fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 80 includes: at least one processor 81 and a memory 82.
The memory stores computer-executable instructions; the at least one processor executes the computer-executable instructions stored by the memory to cause the at least one processor to perform the compressed air energy storage method provided by the above embodiments.
The electronic device provided by the embodiment of the application is used for executing the compressed air energy storage method provided by the embodiment, the implementation mode and the principle are the same, and the description is omitted.
The embodiment of the application provides a computer-readable storage medium, wherein a computer executing instruction is stored in the computer-readable storage medium, and when a processor executes the computer executing instruction, the compressed air energy storage method provided by any one of the above embodiments is implemented.
The storage medium including the computer executable instructions according to the embodiments of the present application may be configured to store the computer executable instructions of the compressed air energy storage method provided in the foregoing embodiments, and an implementation manner and a principle thereof are the same, and are not described again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A compressed air energy storage method is applied to a compressed air energy storage system, and the system comprises: liquid pump, first liquid storage pot, second liquid storage pot, gas bomb and generator, the mounted position of first liquid storage pot is higher than the mounted position of second liquid storage pot, first liquid storage pot with be equipped with the infusion pipeline between the second liquid storage pot, the liquid pump is in on the infusion pipeline, the business turn over gas port of second liquid storage pot with be equipped with the gas transmission pipeline between the business turn over gas port of gas bomb, its characterized in that, the method includes:
obtaining rated power of the compressed air energy storage system;
controlling the liquid pump to operate at an initial rotation speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, and communicating the gas conveying pipeline, so that the liquid in the first liquid storage tank is injected into the second liquid storage tank through the liquid conveying pipeline according to a first preset flow based on the liquid pump, and the gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline;
monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed;
when the temperature change value of the system reaches a preset threshold value, based on the liquid pump, injecting the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline according to a second preset flow, wherein the second preset flow is smaller than the first preset flow, and meanwhile, according to the current pressure of the liquid pump, adjusting the rotating speed of the liquid pump until the liquid pump reaches the rated power;
after the liquid pump reaches the rated power, if an energy storage calling instruction is received, based on the gas transmission pipeline, inputting gas in the gas storage bottle into the second liquid storage tank, and enabling liquid in the second liquid storage tank to be injected into the first liquid storage tank through the liquid transmission pipeline, so that the liquid pump drives the generator to generate electricity based on the current power.
2. The method of claim 1, wherein said adjusting the speed of the liquid pump in accordance with the current pressure of the liquid pump comprises:
acquiring a compression working efficiency characteristic curve of the liquid pump and the current pressure of the liquid pump; the compression working efficiency characteristic curve represents the corresponding relation among the pressure, the rotating speed and the compression working efficiency of the liquid pump;
determining a target rotating speed corresponding to the current pressure according to the compression working efficiency characteristic curve;
and adjusting the rotation speed of the liquid pump according to the target rotation speed.
3. The method according to claim 2, wherein the determining a target rotation speed corresponding to the current pressure according to the characteristic curve of the compression working efficiency comprises:
when the rotating speed change value of the liquid pump in a preset time period does not exceed a preset threshold value, determining the rotating speed correction direction of the liquid pump according to the compression working efficiency of the liquid pump under the current rotating speed and the current pressure, which is represented by the compression working efficiency characteristic curve;
and determining the target rotating speed corresponding to the current pressure according to the rotating speed correction direction of the liquid pump and a preset rotating speed correction scale.
4. The method of claim 2, further comprising:
acquiring the pressure of a gas storage bottle, the liquid injection flow of the second liquid storage tank, the torque of the liquid pump and the temperature of a system in the process that the liquid pump runs at the target rotating speed;
determining the current power of the liquid pump according to the gas bomb pressure, the liquid injection flow of the second liquid storage tank, the torque of the liquid pump and the system temperature;
and judging whether the liquid pump reaches the rated power or not according to the magnitude relation between the current power and the rated power of the liquid pump.
5. The method of claim 4, further comprising:
when the liquid pump reaches the rated power, determining the target rotating speed of the liquid pump according to the rated power and the torque of the liquid pump;
and limiting the rotation speed of the liquid pump according to the target rotation speed.
6. A compressed air energy storage device is applied to a compressed air energy storage system, and the system comprises: liquid pump, first liquid storage pot, second liquid storage pot, gas bomb and generator, the mounted position of first liquid storage pot is higher than the mounted position of second liquid storage pot, first liquid storage pot with be equipped with the infusion line between the second liquid storage pot, the liquid pump is in on the infusion line, the business turn over gas port of second liquid storage pot with be equipped with the gas transmission line between the business turn over gas port of gas bomb, its characterized in that, the device includes:
the acquisition module is used for acquiring the rated power of the compressed air energy storage system;
the first energy storage module is used for controlling the liquid pump to operate at an initial rotating speed according to the rated power, simultaneously communicating a liquid conveying pipeline between the first liquid storage tank and the second liquid storage tank, communicating the gas conveying pipeline, and injecting liquid in the first liquid storage tank into the second liquid storage tank through the liquid conveying pipeline based on the liquid pump according to a first preset flow rate, so that gas in the second liquid storage tank enters the gas storage bottle through the gas conveying pipeline;
the monitoring module is used for monitoring a system temperature change value of the compressed air energy storage system in the process that the liquid pump runs at an initial rotating speed;
the second energy storage module is used for injecting the liquid in the first liquid storage tank into the second liquid storage tank through the infusion pipeline based on a second preset flow rate of the liquid pump when the temperature change value of the system reaches a preset threshold value, wherein the second preset flow rate is smaller than the first preset flow rate, and the rotating speed of the liquid pump is adjusted according to the current pressure of the liquid pump until the liquid pump reaches the rated power;
and the energy storage calling module is used for inputting the gas in the gas storage bottle into the second liquid storage tank based on the gas pipeline if an energy storage calling instruction is received after the liquid pump reaches the rated power, so that the liquid in the second liquid storage tank is injected into the first liquid storage tank through the liquid pipeline, and the liquid pump drives the generator to generate power based on the current power.
7. A compressed air energy storage system, comprising: a liquid pump, a first liquid storage tank, a second liquid storage tank, a gas storage bottle, a generator and the compressed air energy storage device of claim 6;
the installation position of the first liquid storage tank is higher than that of the second liquid storage tank, a liquid conveying pipeline is arranged between the first liquid storage tank and the second liquid storage tank, the liquid pump is arranged on the liquid conveying pipeline, and a gas conveying pipeline is arranged between a gas inlet and a gas outlet of the second liquid storage tank and a gas inlet and a gas outlet of the gas storage bottle;
the compressed air energy storage device controls the compressed air energy storage system by adopting the compressed air energy storage method of any one of claims 1 to 5.
8. The system of claim 7, wherein the air inlet of the second air cylinder is provided with an air inlet pipe which is communicated with the outside of the system and is used for filling the second air cylinder with external air.
9. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any of claims 1 to 5.
10. A computer-readable storage medium having computer-executable instructions stored thereon which, when executed by a processor, implement the method of any one of claims 1 to 5.
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| CN116608092A (en) * | 2023-05-22 | 2023-08-18 | 长江三峡集团实业发展(北京)有限公司 | Offshore wind generating set and energy storage system |
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| CN116608092A (en) * | 2023-05-22 | 2023-08-18 | 长江三峡集团实业发展(北京)有限公司 | Offshore wind generating set and energy storage system |
| CN116608092B (en) * | 2023-05-22 | 2024-04-12 | 长江三峡集团实业发展(北京)有限公司 | Offshore wind generating set and energy storage system |
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