Control method of energy storage temperature control system, medium and equipment

Abstract

The invention discloses a control method of an energy storage temperature control system, a medium and equipment. The control method comprises the steps that the target temperature and the discharge plan of an energy storage module and the second time, used for precooling, of a refrigeration module are obtained in advance of the first time; obtaining a pre-heating value of the energy storage module according to the discharge plan of the energy storage module; the pre-refrigerating capacity of the refrigerating module is obtained according to the pre-heating capacity of the energy storage module; according to the target temperature of the energy storage module and the second time of the refrigeration module, the cooling balance refrigerating capacity of the refrigeration module for enabling cooling liquid of the refrigeration module to reach a temperature balance state at the second time is obtained; the total refrigerating capacity is obtained according to the pre-refrigerating capacity and the cooling balance refrigerating capacity; according to the total refrigerating capacity and the second time, the target refrigerating power of the refrigerating module is obtained; and the refrigeration module carries out refrigeration in advance of second time according to the target refrigeration power. The temperature of the energy storage module can be reduced to be lower than the target temperature, and heat generated when the energy storage module discharges is waited in advance.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a control method, medium and equipment for an energy storage temperature control system. Background Art

[0002] Most energy storage temperature control solutions on the market use the coolant temperature as the final target value and use the PID algorithm to control the energy storage temperature. However, this energy storage temperature control solution has the problem of being unable to perform pre-temperature adjustment and can only be passively adjusted after the energy storage coolant temperature rises. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention proposes a control method, medium and equipment for an energy storage temperature control system.

[0004] The present invention provides a control method for an energy storage temperature control system, wherein the energy storage temperature control system includes an energy storage module and a refrigeration module, including:

[0005] Acquire a target temperature of the energy storage module, a discharge plan, and a second time for precooling of the refrigeration module in advance at a first time; wherein the second time is less than or equal to the first time;

[0006] According to the discharge plan of the energy storage module, the preheating amount of the energy storage module is obtained;

[0007] According to the preheating amount of the energy storage module, the precooling capacity of the refrigeration module for precooling the energy storage module is obtained;

[0008] According to the target temperature of the energy storage module and the second time of the refrigeration module, obtaining a cooling equilibrium refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature equilibrium state at the second time;

[0009] According to the pre-cooling capacity and the cooling balance cooling capacity, the total cooling capacity is obtained; wherein the total cooling capacity = the total pre-cooling capacity + the ambient cooling balance cooling capacity;

[0010] Obtaining a target cooling power of the cooling module according to the total cooling capacity and the second time;

[0011] The refrigeration module performs refrigeration in advance for a second time according to the target refrigeration power.

[0012] Preferably, according to the target temperature of the energy storage module and the second time of the refrigeration module, obtaining the cooling equilibrium refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature equilibrium state at the second time specifically includes:

[0013] According to the target temperature of the energy storage module and the second time of the refrigeration module, a cooling balance power of the refrigeration module is obtained so that the coolant of the refrigeration module reaches a temperature balance state within the second time;

[0014] According to the cooling balance power of the refrigeration module and the second time of the refrigeration module, the cooling balance refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature balance state in the second time is obtained.

[0015] Preferably, the discharge plan includes discharge output power and discharge time.

[0016] Preferably, according to the discharge plan of the energy storage module, the preheating amount of the energy storage module is obtained, which specifically includes:

[0017] According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating amount of the energy storage module is obtained.

[0018] Preferably, according to the discharge plan of the energy storage module and the preset heating coefficient, the preheating amount of the energy storage module is obtained, which specifically includes:

[0019] According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating value of the energy storage module is obtained based on the FLC algorithm.

[0020] Preferably, before obtaining the cooling balance power of the refrigeration module for making the coolant of the refrigeration module reach a temperature balance state within the second time according to the target temperature of the energy storage module and the second time, the method further includes:

[0021] Get the cooling balance power table of the cooling module.

[0022] Preferably, according to the target temperature of the energy storage module and the second time, obtaining the cooling balance power of the refrigeration module for making the temperature of the energy storage module reach the target temperature within the second time specifically includes:

[0023] According to the target temperature of the energy storage module and the second time, the cooling balance power of the refrigeration module that enables the coolant of the refrigeration module to reach a temperature balance state within the second time is obtained from the cooling balance power table.

[0024] Preferably, obtaining the cooling balance power table of the refrigeration module specifically includes:

[0025] Placing the energy storage module and the refrigeration module under different temperature conditions;

[0026] Turning off the charging and discharging of the energy storage module so that the refrigeration module performs refrigeration at a different first fixed frequency;

[0027] At a certain temperature, when the energy storage module reaches the target temperature from the temperature within the second time, the first fixed frequency is used as the cooling balance power at the temperature;

[0028] The cooling balance power at different temperatures is calculated and a cooling balance power table is formed.

[0029] Preferably, a target refrigeration power of the refrigeration module is obtained according to the total refrigeration capacity and the second time;

[0030] Dividing the second time according to preset time intervals to obtain multiple second time periods;

[0031] Dividing the total cooling capacity and the plurality of second time periods to obtain the cooling capacity of each time period;

[0032] According to the cooling capacity in each time period, the target cooling power in each time period is obtained;

[0033] Among them, in the second time period, the target cooling power in the front time period is less than or equal to the cooling power in the back time period.

[0034] Preferably, a power output limit for each time period is preset in the refrigeration module, and the target refrigeration power for each time period is less than or equal to the power output limit of the refrigeration module.

[0035] Preferably, the process of obtaining the power output limit in each time period includes:

[0036] Placing the energy storage module and the refrigeration module under target temperature conditions;

[0037] The energy storage module is discharged at different discharge powers to obtain the discharge cooling equilibrium power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers;

[0038] The discharge cooling balance power is used as the power output limit of the refrigeration module.

[0039] Preferably, the energy storage module is discharged at different discharge powers to obtain the discharge cooling equilibrium power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers, specifically including:

[0040] Discharging the energy storage module at different discharge powers;

[0041] When the energy storage module is discharged at a certain discharge power, the refrigeration module is simultaneously refrigerated at a different second fixed frequency;

[0042] When the temperature of the energy storage module reaches a temperature equilibrium state within a certain time period, the second fixed frequency is used as the discharge cooling equilibrium power of the refrigeration module within the time period under the discharge power.

[0043] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the control method of the energy storage temperature control system as described in any one of the above is implemented.

[0044] The present invention also proposes an electronic device, comprising: a processor and a memory, the memory being used to store one or more programs; when the one or more programs are executed by the processor, the control method of the energy storage temperature control system as described in any one of the above is implemented.

[0045] In the present invention, the control method, medium and device of the energy storage temperature control system proposed can calculate the heat generation of the energy storage module in advance based on the discharge plan of the energy storage module, and use the refrigeration module to refrigerate the energy storage module in advance according to the heat generation of the energy storage module, so that the temperature of the energy storage module drops to a state lower than the target temperature, and waits in advance for the heat generated by the energy storage module when discharging to perform pre-temperature adjustment, thereby avoiding the problem of passive adjustment that can only be performed after the temperature of the energy storage coolant rises. Compared with the technical method in the prior art that uses the temperature of the coolant as the control input, there are obvious advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a structural schematic diagram of a control method for an energy storage temperature control system proposed by the present invention. DETAILED DESCRIPTION

[0047] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0048] Reference Figure 1 The present invention provides a control method for an energy storage temperature control system, wherein the energy storage temperature control system includes an energy storage module and a refrigeration module, including:

[0049] Acquire a target temperature of the energy storage module, a discharge plan, and a second time for precooling of the refrigeration module in advance at a first time; wherein the second time is less than or equal to the first time;

[0050] According to the discharge plan of the energy storage module, the preheating amount of the energy storage module is obtained;

[0051] According to the preheating amount of the energy storage module, a precooling capacity of the refrigeration module for precooling the energy storage module is obtained;

[0052] According to the target temperature of the energy storage module and the second time of the refrigeration module, obtaining a cooling balance power of the refrigeration module for making the temperature of the energy storage module reach the target temperature within the second time;

[0053] According to the cooling balance power of the refrigeration module and the second time, the cooling balance refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature balance state at the second time is obtained;

[0054] According to the pre-cooling capacity and the cooling balance cooling capacity, the total cooling capacity is obtained; wherein the total cooling capacity = the total pre-cooling capacity + the ambient cooling balance cooling capacity;

[0055] Obtaining a target cooling power of the cooling module according to the total cooling capacity and the second time;

[0056] The refrigeration module performs refrigeration in advance for a second time according to the target refrigeration power.

[0057] The present invention can calculate the heat generation of the energy storage module in advance based on the discharge plan of the energy storage module, and use the refrigeration module to cool the energy storage module in advance according to the heat generation of the energy storage module, so that the temperature of the energy storage module drops to a state lower than the target temperature, and waits in advance for the heat generated by the energy storage module when it is discharged to perform pre-temperature adjustment, thereby avoiding the problem of passive adjustment that can only be performed after the temperature of the energy storage coolant rises. Compared with the technical method in the prior art that uses the temperature of the coolant as the control input, there are obvious advantages.

[0058] It should be noted that the discharge plan in this embodiment includes discharge output power and discharge time.

[0059] In this embodiment, according to the discharge plan of the energy storage module, the preheating amount of the energy storage module is obtained, which specifically includes:

[0060] According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating amount of the energy storage module is obtained.

[0061] In a further embodiment, the preheating amount of the energy storage module is obtained according to the discharge plan of the energy storage module and the preset heating coefficient, which specifically includes:

[0062] According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating value of the energy storage module is obtained based on the FLC algorithm.

[0063] Among them, calorific value = discharge output power × discharge time × heating coefficient.

[0064] The FLC (Fuzzy Logic Control) algorithm divides the input variables into segments, for example: [a:b], [b:c] [c:d] [d:e] [e:f]. This embodiment adopts the FLC algorithm to perform interval control for the heat generation in different situations, that is, each section can be controlled using a different heat release coefficient. Ideally, the heat generation coefficient can be more finely controlled in combination with the actual test precision of the experiment. Compared with the one parameter of the entire control strategy of PID, the FLC algorithm is more detailed and accurate, so the preheating value of the energy storage module obtained in this embodiment is more accurate.

[0065] In order to quickly obtain the cooling balance power, in this embodiment, before obtaining the cooling balance power of the refrigeration module for making the temperature of the energy storage module reach the target temperature within the second time according to the target temperature of the energy storage module and the second time, the method further includes:

[0066] A cooling balance power table of the refrigeration module is obtained when the coolant of the refrigeration module reaches a temperature balance state at different temperatures within the second time.

[0067] Wherein, according to the target temperature of the energy storage module and the second time, the cooling balance power of the refrigeration module used to make the temperature of the energy storage module reach the target temperature within the second time is obtained, specifically including:

[0068] According to the target temperature of the energy storage module and the second time, the cooling balance power of the refrigeration module used to make the temperature of the energy storage module reach the target temperature within the second time is obtained from the cooling balance power table.

[0069] In order to obtain the cooling balance power table of the refrigeration module in advance,

[0070] Wherein, obtaining the cooling balance power table of the refrigeration module when the coolant of the refrigeration module reaches a temperature equilibrium state at different temperatures within the second time specifically includes:

[0071] Placing the energy storage module and the refrigeration module under different temperature conditions;

[0072] Turning off the charging and discharging of the energy storage module so that the refrigeration module performs refrigeration at a different first fixed frequency;

[0073] At a certain temperature, when the coolant of the energy storage module refrigeration module reaches a temperature equilibrium state within a second time, the first fixed frequency is used as the cooling equilibrium power of the refrigeration module at the temperature;

[0074] The cooling balance powers of the refrigeration module at different temperatures are used to form a cooling balance power table of the refrigeration module.

[0075] In this embodiment, the target cooling power of the cooling module is obtained according to the total cooling capacity and the second time;

[0076] Dividing the second time according to preset time intervals to obtain multiple second time periods;

[0077] Dividing the total cooling capacity and the plurality of second time periods to obtain the cooling capacity of each time period;

[0078] According to the cooling capacity in each time period, the target cooling power in each time period is obtained;

[0079] Among them, in the second time period, the target cooling power in the front time period is less than or equal to the cooling power in the back time period.

[0080] This embodiment can set different interval values ​​according to different calorific values, so as to perform more efficient refrigeration control to achieve optimal energy saving requirements.

[0081] In a further embodiment, a power output limit for each time period is preset in the refrigeration module, and the target refrigeration power for each time period is less than or equal to the power output limit of the refrigeration module.

[0082] In order to finely control the target cooling power in each time period and improve the cooling efficiency, in this embodiment, the process of obtaining the power output limit in each time period includes:

[0083] Placing the energy storage module and the refrigeration module under target temperature conditions;

[0084] The energy storage module is discharged at different discharge powers to obtain the discharge cooling equilibrium power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers;

[0085] The discharge cooling balance power in each time period is used as the power output limit of the refrigeration module in the time period.

[0086] In a further embodiment, the energy storage module is discharged at different discharge powers, and the discharge cooling balance power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers is obtained, specifically including:

[0087] Discharging the energy storage module at different discharge powers;

[0088] When the energy storage module is discharged at a certain discharge power, the refrigeration module is made to perform refrigeration at a different second fixed frequency;

[0089] When the temperature of the energy storage module reaches a temperature equilibrium state within a certain time period, the second fixed frequency is used as the discharge cooling equilibrium power of the refrigeration module within the time period under the discharge power.

[0090] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A control method for an energy storage temperature control system, the energy storage temperature control system comprising an energy storage module and a refrigeration module, characterized in that: include: A target temperature of the energy storage module, a discharge plan, and a second time for precooling of the refrigeration module are obtained in advance at a first time; wherein the second time is less than or equal to the first time; wherein the discharge plan includes a discharge output power and a discharge time. According to the discharge plan of the energy storage module, the preheating amount of the energy storage module is obtained; According to the preheating amount of the energy storage module, the precooling capacity of the refrigeration module for precooling the energy storage module is obtained; According to the target temperature of the energy storage module and the second time of the refrigeration module, obtaining a cooling equilibrium refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature equilibrium state at the second time; According to the pre-cooling capacity and the cooling balance cooling capacity, the total cooling capacity is obtained; wherein the total cooling capacity = the total pre-cooling capacity + the ambient cooling balance cooling capacity; Obtaining a target cooling power of the cooling module according to the total cooling capacity and the second time; The refrigeration module performs refrigeration in advance for a second time according to the target refrigeration power.

2. The control method of the energy storage temperature control system according to claim 1, characterized in that: According to the target temperature of the energy storage module and the second time of the refrigeration module, the cooling equilibrium refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature equilibrium state at the second time is obtained, specifically including: According to the target temperature of the energy storage module and the second time of the refrigeration module, a cooling balance power of the refrigeration module is obtained so that the coolant of the refrigeration module reaches a temperature balance state within the second time; According to the cooling balance power of the refrigeration module and the second time of the refrigeration module, the cooling balance refrigeration capacity of the refrigeration module for making the coolant of the refrigeration module reach a temperature balance state in the second time is obtained.

3. The control method of the energy storage temperature control system according to claim 1, characterized in that: According to the discharge plan of the energy storage module, the preheating of the energy storage module is obtained, including: According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating amount of the energy storage module is obtained; Preferably, according to the discharge plan of the energy storage module and the preset heating coefficient, the preheating amount of the energy storage module is obtained, which specifically includes: According to the discharge plan of the energy storage module and the preset heating coefficient, the preheating value of the energy storage module is obtained based on the FLC algorithm.

4. The control method of the energy storage temperature control system according to claim 2, characterized in that: Before obtaining the cooling balance power of the refrigeration module for making the coolant of the refrigeration module reach a temperature balance state within the second time according to the target temperature of the energy storage module and the second time, the method further includes: A cooling balance power table of the refrigeration module is obtained when the coolant of the refrigeration module reaches a temperature balance state at different temperatures within the second time.

5. The control method of the energy storage temperature control system according to claim 4, characterized in that: According to the target temperature of the energy storage module and the second time, the cooling balance power of the refrigeration module used to make the temperature of the energy storage module reach the target temperature within the second time is obtained, specifically including: According to the target temperature of the energy storage module and the second time, the cooling balance power of the refrigeration module that enables the coolant of the refrigeration module to reach a temperature balance state within the second time is obtained from the cooling balance power table.

6. The control method of the energy storage temperature control system according to claim 4, characterized in that: Obtaining a cooling balance power table of the refrigeration module when the coolant of the refrigeration module reaches a temperature equilibrium state at different temperatures within the second time, specifically including: Placing the energy storage module and the refrigeration module under different temperature conditions; Turning off the charging and discharging of the energy storage module so that the refrigeration module performs refrigeration at a different first fixed frequency; At a certain temperature, when the coolant of the refrigeration module reaches a temperature equilibrium state within a second time, the first fixed frequency is used as the cooling equilibrium power of the refrigeration module at the temperature; The cooling balance powers of the refrigeration module at different temperatures are used to form a cooling balance power table of the refrigeration module.

7. The control method of the energy storage temperature control system according to claim 1, characterized in that: Obtaining a target cooling power of the cooling module according to the total cooling capacity and the second time; Dividing the second time according to preset time intervals to obtain multiple second time periods; Dividing the total cooling capacity and the plurality of second time periods to obtain the cooling capacity of each time period; According to the cooling capacity in each time period, the target cooling power in each time period is obtained; Wherein, within the second time period, the target cooling power in the preceding time period is less than or equal to the cooling power in the succeeding time period; Preferably, the refrigeration module is preset with a power output limit for each time period, and the target refrigeration power for each time period is less than or equal to the power output limit of the refrigeration module; Preferably, the process of obtaining the power output limit in each time period includes: Placing the energy storage module and the refrigeration module under target temperature conditions; The energy storage module is discharged at different discharge powers to obtain the discharge cooling equilibrium power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers; The discharge cooling balance power in different time periods is used as the power output limit of the refrigeration module in the time period.

8. The control method of the energy storage temperature control system according to claim 7, characterized in that: The energy storage module is discharged at different discharge powers to obtain the discharge cooling equilibrium power when the refrigeration module makes the temperature of the energy storage module reach a temperature equilibrium state in different time periods under different discharge powers, specifically including: Discharging the energy storage module at different discharge powers; When the energy storage module is discharged at a certain discharge power, the refrigeration module is simultaneously refrigerated at a different second fixed frequency; When the temperature of the energy storage module reaches a temperature equilibrium state within a certain time period, the second fixed frequency is used as the discharge cooling equilibrium power of the refrigeration module within the time period under the discharge power.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the control method of the energy storage temperature control system according to any one of claims 1 to 7 is implemented.

10. An electronic device, characterized in that: include: A processor and a memory, the memory being used to store one or more programs; When one or more programs are executed by a processor, the control method of the energy storage temperature control system according to any one of claims 1 to 7 is implemented.

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