Method, device and equipment for determining adjustable power of refrigeration station and storage medium

Abstract

The invention relates to an adjustable power determination method and device of a refrigeration station, equipment and a storage medium. The method comprises the following steps: determining a target refrigeration mode corresponding to the refrigeration station according to an electricity price time period to which the current electricity price of the refrigeration station belongs; target refrigeration parameters of refrigeration equipment in the refrigeration station, candidate refrigeration parameters of the refrigeration equipment and the target refrigeration capacity of the refrigeration station are obtained; according to the target refrigerating capacity, the target refrigerating mode and the target refrigerating parameters, the reference power of the refrigerating station is determined; according to the target refrigerating capacity, the target refrigerating mode and the candidate refrigerating parameters, candidate power corresponding to the candidate refrigerating parameters is determined; and the difference value between the candidate power and the reference power is used as the adjustable power of the refrigeration station. By adopting the method, accurate quantification of the adjustable power of the refrigeration station is realized.

Description

Technical Field

[0001] The present application relates to the field of refrigeration control technology, and in particular to a method, device, equipment and storage medium for determining the adjustable power of a refrigeration station. Background Art

[0002] With the development of urbanization, the demand for intensive regional energy utilization is becoming increasingly urgent, and centralized cooling systems have emerged as a new type of infrastructure. District cooling stations utilize large-scale cooling equipment to provide efficient, intensive cooling services to buildings within a specific area through a cooling pipe network. The adjustable power of these cooling stations can be used to guide their participation in various power resource interaction scenarios, such as demand response services and virtual power plant load regulation.

[0003] However, the adjustable power of a refrigeration station under traditional methods is usually determined based on historical experience, which is difficult to objectively quantify and has low accuracy. Summary of the Invention

[0004] Based on this, it is necessary to provide a method, device, equipment and storage medium for determining the adjustable power of a refrigeration station to address the above technical problems, so as to accurately quantify the adjustable power of the refrigeration station.

[0005] In a first aspect, the present application provides a method for determining the adjustable power of a refrigeration station, comprising:

[0006] Determine the target cooling mode corresponding to the cooling station based on the electricity price period to which the current electricity price of the cooling station belongs;

[0007] Obtaining target cooling parameters and candidate cooling parameters of the cooling equipment in the cooling station, as well as a target cooling capacity of the cooling station;

[0008] Determine the baseline power of the refrigeration station according to the target cooling capacity, target cooling mode and target cooling parameters;

[0009] Determining a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0010] The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

[0011] In one of the embodiments, a target cooling mode corresponding to the cooling station is determined according to the electricity price period in which the current electricity price of the cooling station is located, including: when the electricity price period is in the off-peak period, determining the target cooling mode corresponding to the cooling station to be the first cooling mode; when the electricity price period is in the peak period, determining the target cooling mode corresponding to the cooling station to be the second cooling mode; wherein, in the first cooling mode, the cooling equipment includes a first refrigeration machine equipment; and in the second cooling mode, the cooling equipment includes a second refrigeration machine equipment and an ice melting device.

[0012] In one embodiment, when the target cooling mode is the first cooling mode, the target cooling parameters of the cooling equipment include the first water outlet temperature of the first cooling equipment; accordingly, the candidate cooling parameters of the first cooling equipment are determined according to the following steps: obtaining the preset water outlet temperature range corresponding to the first cooling equipment; and taking at least one water outlet temperature in the preset water outlet temperature range that is greater than the first water outlet temperature as the candidate cooling parameter of the first cooling equipment.

[0013] In one embodiment, when the target cooling mode is the second cooling mode, the target cooling parameter of the refrigeration equipment includes a first ice melting rate of the ice melting equipment; accordingly, the candidate cooling parameters of the ice melting equipment are determined according to the following steps: obtaining a preset ice melting rate interval corresponding to the ice melting equipment; and taking at least one ice melting rate in the preset ice melting rate interval that is greater than the first ice melting rate as a candidate cooling parameter of the ice melting equipment.

[0014] In one embodiment, the further step includes: when the target cooling mode is the second cooling mode, obtaining the ice storage capacity of the refrigeration station; and for each adjustable power, determining the duration of the refrigeration station under the adjustable power based on the ice storage capacity and the candidate cooling parameters corresponding to the adjustable power.

[0015] In one embodiment, the method further includes fitting the durations corresponding to different adjustable powers to obtain an adjustable capacity evaluation curve of the refrigeration station.

[0016] In a second aspect, the present application further provides a device for determining adjustable power of a refrigeration station, comprising:

[0017] A first determination module is used to determine a target cooling mode corresponding to the cooling station according to the electricity price period to which the current electricity price of the cooling station belongs;

[0018] A first acquisition module is configured to acquire target refrigeration parameters and candidate refrigeration parameters of refrigeration equipment in the refrigeration station, as well as a target refrigeration capacity of the refrigeration station;

[0019] A second determining module is configured to determine a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameters;

[0020] a third determining module, configured to determine a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0021] The first processing module is configured to use the difference between the candidate power and the reference power as the adjustable power of the refrigeration station.

[0022] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0023] Determine the target cooling mode corresponding to the cooling station based on the electricity price period to which the current electricity price of the cooling station belongs;

[0024] Obtaining target cooling parameters and candidate cooling parameters of the cooling equipment in the cooling station, as well as a target cooling capacity of the cooling station;

[0025] Determine the baseline power of the refrigeration station according to the target cooling capacity, target cooling mode and target cooling parameters;

[0026] Determining a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0027] The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

[0028] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0029] Determine the target cooling mode corresponding to the cooling station based on the electricity price period to which the current electricity price of the cooling station belongs;

[0030] Obtaining target cooling parameters and candidate cooling parameters of the cooling equipment in the cooling station, as well as a target cooling capacity of the cooling station;

[0031] Determine the baseline power of the refrigeration station according to the target cooling capacity, target cooling mode and target cooling parameters;

[0032] Determining a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0033] The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

[0034] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0035] Determine the target cooling mode corresponding to the cooling station based on the electricity price period to which the current electricity price of the cooling station belongs;

[0036] Obtaining target cooling parameters and candidate cooling parameters of the cooling equipment in the cooling station, as well as a target cooling capacity of the cooling station;

[0037] Determine the baseline power of the refrigeration station according to the target cooling capacity, target cooling mode and target cooling parameters;

[0038] Determining a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0039] The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

[0040] The above-mentioned method, device, equipment and storage medium for determining the adjustable power of the refrigeration station, by associating the electricity price period to which the current electricity price of the refrigeration station belongs with the target refrigeration mode of the refrigeration station, is conducive to reducing the cooling cost. By obtaining the target refrigeration parameters of the refrigeration equipment in the refrigeration station and the candidate refrigeration parameters of the refrigeration equipment, as well as the target cooling capacity of the refrigeration station, a data basis is provided for the subsequent determination of the adjustable power of the refrigeration station. By determining the reference power of the refrigeration station based on the target cooling capacity, target cooling mode and target cooling parameters, and determining the candidate power corresponding to the candidate cooling parameters based on the target cooling capacity, target cooling mode and candidate refrigeration parameters, and subtracting the candidate power from the reference power, it is possible to quantitatively evaluate the adjustment capacity boundary of the refrigeration station for the target cooling capacity and target cooling mode, that is, to realize the determination of the adjustable power of the refrigeration station, and also provide a reliable basis for the rational allocation of power resources and power regulation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0042] Figure 1 This is a schematic structural diagram of a refrigeration station in one embodiment;

[0043] Figure 2A 1 is a flow chart of a method for determining the adjustable power of a refrigeration station in one embodiment;

[0044] Figure 2B is a flow chart of the steps for determining the reference power in one embodiment;

[0045] Figure 2C is a schematic diagram of an adjustable capacity evaluation curve in one embodiment;

[0046] Figure 3 1 is a flow chart of a method for determining the adjustable power of a refrigeration station in another embodiment;

[0047] Figure 4 is a structural block diagram of an adjustable power determination device for a refrigeration station in one embodiment;

[0048] Figure 5 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0050] The method for determining the adjustable power of a refrigeration station provided in the embodiment of the present application can be applied to Figure 1 In the refrigeration station shown, the refrigeration station can include a cooling tower, cooling water pumps, chilled water pumps, chillers, and ice melt equipment. The cooling output of the refrigeration station (i.e., the primary side) is used to supply cooling to the target area (i.e., the secondary side) through the cooling exchange plate. The target area can include at least one building, such as Building A, Building B, and Building C.

[0051] Exemplarily, the chiller equipment may include a base load main unit and at least one dual-mode main unit. The base load main unit is used to output basic cooling capacity. The dual-mode main unit can operate in cooling mode and ice storage mode. The dual-mode main unit in cooling mode outputs cooling capacity; the dual-mode main unit in ice storage mode stores ice.

[0052] Illustratively, the ice melting equipment may include an ice storage tank and a water pump corresponding to the ice storage tank.

[0053] The target cooling mode of the refrigeration station is described below.

[0054] First Cooling Mode: When electricity prices are flat or off during the off-peak period, the target cooling mode for the refrigeration station can be set to the first cooling mode. The cooling strategy for the first cooling mode can be understood as prioritizing the cooling of the chillers. For example, the base load host can be enabled to provide a base cooling capacity. If the base cooling capacity is less than the target cooling capacity, a corresponding number of dual-mode hosts are enabled and switched to cooling mode to ensure that the combined cooling capacity of the chillers is at least as high as the target cooling capacity.

[0055] Second Cooling Mode: During peak electricity prices, the target cooling mode for the refrigeration station can be set to the second cooling mode. The cooling strategy for the second cooling mode can be understood as prioritizing the activation of ice-melting equipment for cooling. For example, the base load unit can be activated to provide a base cooling capacity. If the base cooling capacity is less than the target cooling capacity, a corresponding number of ice-melting equipment are activated to ensure that the combined cooling capacity of the base load unit and ice-melting equipment does not fall below the target cooling capacity.

[0056] Optionally, in the first refrigeration mode, other dual-mode hosts can be turned on and switched to ice storage mode to reserve the required amount of ice.

[0057] Optionally, in the second cooling mode, if the combined cooling capacity of the base load host and each ice melting device is still less than the target cooling capacity, the dual-mode host in the cooling mode can be additionally turned on to supplement the cooling supply.

[0058] Continue to refer Figure 1 , Figure 1 It is shown in the example that the refrigeration equipment can include one base load host and three dual-mode hosts. For example, an ethylene glycol pump can be used to provide refrigerant for the dual-mode host. The refrigeration station produces primary-side chilled water, which is heat-exchanged with the secondary-side chilled water on the user side through a cold supply plate exchanger. The refrigerant of the dual-mode host is ethylene glycol solution. Optionally, the ice storage tank and the dual-mode host can be connected in series to simultaneously supply cooling and exchange heat with the primary-side chilled water through an ice melting / dual-mode plate exchanger. Optionally, the base load host can directly cool the primary-side chilled water. It should be noted that this application does not impose any restrictions on the specific structure and specific control method of the refrigeration station.

[0059] In one embodiment, Figure 2A As shown, a method for determining the adjustable power of a refrigeration station is provided. This embodiment uses the method applied to a terminal as an example for illustration. It is understood that the method can also be applied to a server, or to a system including a terminal and a server, and implemented through interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0060] S210: Determine a target cooling mode corresponding to the cooling station according to the electricity price period to which the current electricity price of the cooling station belongs.

[0061] The electricity price period can be understood as the time-of-use electricity price billing interval divided by the power grid based on electricity load characteristics. The electricity price billing interval can be divided into the electricity price flat period and the electricity price peak period. The unit electricity price during the electricity price flat period is lower than the unit electricity price during the electricity price peak period.

[0062] In an optional embodiment, when the electricity price period is in the off-peak period, the target cooling mode corresponding to the refrigeration station is determined to be the first cooling mode; when the electricity price period is in the peak period, the target cooling mode corresponding to the refrigeration station is determined to be the second cooling mode; wherein, in the first cooling mode, the refrigeration equipment includes a first refrigeration machine equipment; and in the second refrigeration mode, the refrigeration equipment includes a second refrigeration machine equipment and an ice melting equipment.

[0063] Optionally, the first refrigeration equipment may include a first base load host and at least one dual-mode host in cooling mode.

[0064] Optionally, the second refrigeration device may include a second base host. The first base host and the second base host may be the same base host or different base hosts, which is not limited in this application.

[0065] S220: Obtain target refrigeration parameters of refrigeration equipment in the refrigeration station, candidate refrigeration parameters of the refrigeration equipment, and target refrigeration capacity of the refrigeration station.

[0066] The target cooling capacity can be determined based on the cooling capacity required by the user.

[0067] The target cooling parameter can be a pre-set cooling parameter. The candidate cooling parameter can be understood as a candidate cooling parameter. The target cooling parameter and the candidate cooling parameter can be one-dimensional parameters, such as "outlet water temperature T"; or multi-dimensional parameters, such as "outlet water temperature T, ice melting rate v."

[0068] Optionally, the target cooling parameter may also be a cooling parameter determined based on the target cooling capacity and the target cooling mode. It should be noted that the target cooling parameter and the candidate cooling parameter may be set by technicians based on needs or experience, or determined through a large number of experiments, and this application does not impose any restrictions on this.

[0069] In an optional embodiment, when the target cooling mode is the first cooling mode, the target cooling parameters of the refrigeration equipment include the first water outlet temperature of the first refrigeration equipment; accordingly, the candidate cooling parameters of the first refrigeration equipment are determined according to the following steps: obtaining the preset water outlet temperature range corresponding to the first refrigeration equipment; and taking at least one water outlet temperature in the preset water outlet temperature range that is greater than the first water outlet temperature as the candidate cooling parameter of the first refrigeration equipment.

[0070] Optionally, the first outlet water temperature may be 4° C., the preset outlet water temperature interval may be [4° C., 7° C.], and the candidate cooling parameters may include 5° C., 6° C., and 7° C. It should be noted that this application does not impose any limitation on the specific numerical range of the preset outlet water temperature interval.

[0071] It can be understood that in the first cooling mode, the cooling equipment corresponding to the cooling station includes the first cooling machine. If you want to adjust the power of the cooling station, you need to adjust the first outlet water temperature of the first cooling machine. This is because for the first cooling mode, under the same restriction of the target cooling capacity, changing the first outlet water temperature of the first cooling machine will change the load rate of the first cooling machine, and then change the equipment power of the first cooling machine. At the same time, the change in the first outlet water temperature will also lead to a change in the humidity on the user side. Therefore, based on comprehensive considerations, the target cooling parameter can be set to 4°C, and when it is necessary to reduce the power of the first cooling machine, the candidate cooling parameter can be selected within the preset outlet water temperature range.

[0072] In an optional embodiment, when the target refrigeration mode is the second refrigeration mode, the target refrigeration parameter of the refrigeration equipment includes the first ice melting rate of the ice melting equipment; accordingly, the candidate refrigeration parameter of the ice melting equipment is determined according to the following steps: obtaining a preset ice melting rate interval corresponding to the ice melting equipment; and taking at least one ice melting rate in the preset ice melting rate interval that is greater than the first ice melting rate as a candidate refrigeration parameter of the ice melting equipment.

[0073] Optionally, the target cooling parameter of the second chiller device may include a second outlet water temperature of the second chiller device. The second outlet water temperature may be the same as the first outlet water temperature. Accordingly, the candidate cooling parameter of the second chiller device may include a third outlet water temperature of the second chiller device. The third outlet water temperature may be the same as the second outlet water temperature.

[0074] It's understood that in the second cooling mode, the refrigeration station's corresponding refrigeration equipment includes a second chiller and an ice-melting device. Given the same cooling output, the power required by the second chiller is significantly greater than that of the ice-melting device. Therefore, in the second cooling mode, under the same target cooling output constraints, adjusting the refrigeration station's power requires increasing the ice-melting device's melting rate, reducing the cooling output required by the second chiller, and thus reducing the refrigeration station's power.

[0075] S230: Determine a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameters.

[0076] In an optional embodiment, the target cooling capacity, the target cooling mode, and the target cooling parameters may be input into a power determination model of the refrigeration station to obtain a reference power of the refrigeration station.

[0077] In another optional embodiment, a refrigeration equipment power model can be constructed for each refrigeration equipment in the refrigeration station; the refrigeration equipment that needs to be turned on and the corresponding number of equipment are determined based on the target refrigeration mode, target cooling capacity and target refrigeration parameters; and the baseline power of the refrigeration station is determined based on the refrigeration equipment that needs to be turned on, the corresponding number of equipment and the corresponding equipment power model.

[0078] For example, for the first cooling mode, based on the target cooling capacity, the refrigeration equipment required to be activated includes: the first chiller, the cooling water pump, the chilled water pump, and the cooling tower. The first chiller may include a baseload host and a dual-mode host. Based on the power model and target cooling parameters of each chiller, the power of the first chiller, the cooling water pump, the chilled water pump, and the cooling tower can be determined. By summing the power of each chiller, the baseline power of the refrigeration station can be obtained.

[0079] For example, for the second cooling mode, based on the target cooling capacity, the refrigeration equipment required to be activated includes: a second chiller, a cooling water pump, a chilled water pump, a cooling tower, and an ice melter. The second chiller may include a base station host. Similarly, based on the power model and target cooling parameters of each chiller, the chiller power, cooling water pump power, chilled water pump power, cooling tower power, and ice melter power are determined. By summing the power of each chiller, the baseline power of the refrigeration station can be obtained.

[0080] For easier understanding, refer to Figure 2B The flowchart of the steps for determining the reference power is shown in FIG. First, by inputting the current electricity price p elc ; According to the current electricity price p elc The target cooling mode corresponding to the cooling station is determined according to the electricity price period. The input data may also include the outdoor temperature T out , ice storage capacity E tes and target cooling capacity (i.e. cooling capacity Q cooling ), which is used to comprehensively determine the target cooling mode of the refrigeration station. This application does not impose any restrictions on the specific determination method of the comprehensive determination of the target cooling mode. For example, the ice storage capacity E tes If the ice storage capacity is less than the preset threshold, the target cooling mode is determined to be the first cooling mode; otherwise, according to the electricity price p elc Determine the target cooling mode.

[0081] Continue to refer Figure 2B If the target cooling mode is the first cooling mode, the chiller power model, chilled water pump power model, cooling water pump power model, and cooling tower power model can be used based on the target cooling parameters (for example, the outlet water temperature of the first chiller is T) to determine the refrigeration station's baseline power, or power baseline. The initial number of first chillers can be 1. Accordingly, it can be determined whether the cooling capacity output by the current number of first chillers reaches the target cooling capacity. If so, the refrigeration station's baseline power is determined. If not, the number of first chillers is incremented by 1, and the process returns to redetermine the refrigeration station's baseline power.

[0082] Similarly, when the target cooling mode is the second cooling mode, based on the target cooling parameters (e.g., the outlet water temperature of the second chiller is T, and the ice melting rate of the ice melting device is v), the chiller power model, the chilled water pump power model, the cooling water pump power model, and the cooling tower power model are invoked to determine the refrigeration station's baseline power, or power baseline. The number of second chillers is 1. Accordingly, a determination is made as to whether the cooling capacity output by the current number of second chillers meets the target cooling capacity. If so, the refrigeration station's baseline power is determined. Otherwise, the number of ice melting devices is increased by 1 (i.e., an additional ice melting tank is activated), the ice melting device power model is invoked, and the baseline power of the refrigeration station is re-determined. Optionally, if the target cooling capacity cannot be achieved by the ice melting devices and the current number of second chillers, additional second chillers can be added.

[0083] S240: Determine candidate powers corresponding to the candidate cooling parameters according to the target cooling capacity, the target cooling mode, and the candidate cooling parameters.

[0084] Similar to the previous steps, for each candidate cooling parameter, the target cooling capacity, target cooling mode, and candidate cooling parameter can be input into the refrigeration station's baseline power determination model to obtain the refrigeration station's candidate power. For example, for an outlet water temperature of 5°C, the refrigeration station's candidate power p1 can be obtained under this candidate cooling parameter; for an outlet water temperature of 6°C, the refrigeration station's candidate power p2 can be obtained under this candidate cooling parameter.

[0085] In another optional embodiment, the refrigeration equipment power model constructed above can be obtained; for each candidate parameter, the refrigeration equipment required to be turned on and the corresponding number of equipment are determined based on the target refrigeration mode, target cooling capacity and candidate refrigeration parameters; based on the refrigeration equipment that needs to be turned on, the corresponding number of equipment and the corresponding equipment power model, the candidate power of the refrigeration station is determined.

[0086] S250: The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

[0087] In an optional embodiment, the method may further include: determining a sustainable duration corresponding to the adjustable power when the reference power of the refrigeration station is adjusted based on the adjustable power.

[0088] For example, for the first cooling mode, since the candidate cooling parameter adjusts the outlet water temperature of the refrigerator, the duration corresponding to the adjustable power may be positive infinity.

[0089] For example, for the second cooling mode, since the candidate cooling parameters adjust the ice melting rate of the ice melting equipment, the duration corresponding to the adjustable power is limited by the ice storage capacity of the refrigeration station. Optionally, when the target cooling mode is the second cooling mode, the ice storage capacity of the refrigeration station can be obtained; for each adjustable power, the duration of the refrigeration station at the adjustable power is determined based on the ice storage capacity and the candidate cooling parameters corresponding to the adjustable power.

[0090] In an optional embodiment, the durations corresponding to different adjustable powers can be fitted to obtain a refrigeration station's adjustable capacity assessment curve. Alternatively, within a preset coordinate system, the x-axis can represent the duration and the y-axis can represent the adjustable power. The durations corresponding to different adjustable powers can be fitted to obtain the refrigeration station's adjustable capacity assessment curve.

[0091] The district cooling plant's adjustable capacity assessment curve represents the system's ability to reduce power at varying durations. This characteristic curve can be used to guide district cooling plants in various flexible power resource interaction scenarios, such as demand response services, peak-shaving and valley-shifting, and virtual power plant load regulation. It also provides guidance for developing strategies for participating in low-carbon operations and subsequent carbon trading markets.

[0092] refer to Figure 2C The schematic diagram of the adjustable capacity evaluation curve shown in FIG. 4 shows that the adjustable capacity evaluation curve can determine the duration corresponding to the maximum adjustable power, that is, the ratio of the ice storage capacity to the ice melting rate corresponding to the maximum adjustable power; the duration corresponding to the minimum adjustable power can also be determined, that is, the ratio of the ice storage capacity to the ice melting rate corresponding to the minimum adjustable power.

[0093] The above-mentioned method for determining the adjustable power of the refrigeration station is beneficial to reducing the cooling cost by associating the electricity price period to which the current electricity price of the refrigeration station belongs with the target cooling mode of the refrigeration station. By obtaining the target cooling parameters of the refrigeration equipment in the refrigeration station and the candidate cooling parameters of the refrigeration equipment, as well as the target cooling capacity of the refrigeration station, a data basis is provided for the subsequent determination of the adjustable power of the refrigeration station. By determining the reference power of the refrigeration station based on the target cooling capacity, target cooling mode and target cooling parameters, and determining the candidate power corresponding to the candidate cooling parameters based on the target cooling capacity, target cooling mode and candidate cooling parameters, and subtracting the candidate power from the reference power, it is possible to quantitatively evaluate the adjustment capacity boundary of the refrigeration station for the target cooling capacity and target cooling mode, that is, to realize the determination of the adjustable power of the refrigeration station, and also provide a reliable basis for the rational allocation of power resources and power regulation of the power grid.

[0094] Based on the above embodiments, the equipment power model of the refrigeration equipment is described in detail.

[0095] In an optional embodiment, the number of refrigeration devices may be determined according to the following formula:

[0096]

[0097] Among them, Q cooling Indicates the user-side cooling capacity, also known as the target cooling capacity; represents the cooling capacity of the nth chiller; q TES Indicates the refrigerant flow rate flowing through the ice storage tank of the ice melting equipment, in m 3 / h; ΔT TES It represents the temperature difference between the inlet and outlet of the ice storage tank, in °C; ρ represents the density of water, i.e. 1000 kg / m 3 c represents the specific heat capacity of water, which is 4.18 kJ / kg° C. For example, the refrigerant flow rate of the ice storage tank can be determined based on the ice melting rate.

[0098] It will be appreciated that in the first cooling mode, cooling is provided solely by the chillers. The number of chillers to be activated can be determined based on the chiller's cooling capacity and the target cooling capacity. In the second cooling mode, cooling is provided by a single base station and a corresponding number of ice-melting devices. The number of ice-melting devices (i.e., cold storage tanks) to be activated can be determined based on the chiller's cooling capacity and the target cooling capacity.

[0099] In an optional embodiment, the cooling power of the cooling device may be determined according to the following formula:

[0100]

[0101]

[0102] Among them, P chiller Indicates the equipment power of the cooling equipment in kW; represents the cooling capacity of the chiller; r represents the load rate, which is the ratio between the actual cooling capacity of the chiller and the rated cooling capacity. The load rate r is affected by the outlet water temperature of the chiller; a, b, and c represent the performance curve fitting parameters; COP PLR Indicates the energy efficiency coefficient under load rate r; COP rated It represents the energy efficiency coefficient at rated power. As can be seen, when the outlet water temperature of the chiller changes, the load rate of the chiller will also change, thus affecting the equipment power of the chiller.

[0103] In an optional embodiment, the chilled water pump power of the chilled water pump may be determined according to the following formula:

[0104]

[0105]

[0106] Among them, P CHW,pump Indicates the power of the chilled water pump in kW; k CHW is the pump performance proportional coefficient; Indicates the chilled water flow rate calculated from the equipment cooling capacity, in m 3 / h; ΔT CHW,chiller The temperature difference between the inlet and outlet of chilled water of the chiller equipment is determined according to the design parameters; It represents the cooling capacity of the chiller; ρ represents the density of water, i.e. 1000kg / m 3 ; c represents the specific heat capacity of water, which is 4.18kJ / kg℃.

[0107] In an optional embodiment, the cooling tower power of the cooling tower can be determined according to the following formula:

[0108]

[0109] in, Indicates the cooling tower power, that is, the actual power of the cooling tower; represents the rated power of the cooling tower; r represents the load rate, which is the ratio between the actual cooling capacity of the refrigeration equipment and the rated cooling capacity.

[0110] In an optional embodiment, the ice melting rate of the ice melting device can be expressed as:

[0111]

[0112]

[0113] Among them, Q TES represents the melting rate; q TES Indicates the refrigerant flow rate flowing through the ice storage tank of the ice melting equipment; ΔT TES represents the temperature difference between the inlet and outlet of the ice storage tank; ρ represents the density of water, i.e. 1000 kg / m 3 ; c represents the specific heat capacity of water, which is 4.18 kJ / kg℃; q pump,rated Indicates the rated flow rate of the water pump corresponding to the ice melting equipment, in m 3 / h.

[0114] The ice melting power of the ice melting device may be determined based on the ice melting rate.

[0115] Based on the above embodiment, a method for determining the adjustable power of a refrigeration station is described in detail.

[0116] refer to Figure 3 A method for determining the adjustable power of a refrigeration station in another embodiment is shown, comprising:

[0117] S310: When the electricity price period is in a flat or off-peak period, determine that the target cooling mode corresponding to the cooling station is a first cooling mode; in the first cooling mode, the cooling equipment includes a first chiller.

[0118] S320: When the electricity price period is at a peak, determine that the target cooling mode corresponding to the refrigeration station is a second cooling mode; in the second cooling mode, the refrigeration equipment includes a second chiller and an ice melting device.

[0119] S330: Obtain target refrigeration parameters of refrigeration equipment in the refrigeration station, candidate refrigeration parameters of the refrigeration equipment, and target refrigeration capacity of the refrigeration station.

[0120] S340: Determine a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameters.

[0121] S350: Determine candidate powers corresponding to the candidate cooling parameters according to the target cooling capacity, the target cooling mode, and the candidate cooling parameters.

[0122] S360: Using the difference between the candidate power and the reference power as the adjustable power of the refrigeration station.

[0123] S370: When the target cooling mode is the second cooling mode, obtain the ice storage capacity of the refrigeration station.

[0124] S380: For each adjustable power, determine the duration of the refrigeration station at the adjustable power according to the ice storage capacity and the candidate refrigeration parameters corresponding to the adjustable power.

[0125] S390: Fit the durations corresponding to different adjustable powers to obtain an adjustable capacity evaluation curve of the refrigeration station.

[0126] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0127] Based on the same inventive concept, embodiments of the present application also provide a device for determining the adjustable power of a refrigeration station for implementing the aforementioned method for determining the adjustable power of a refrigeration station. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of the embodiments of the device for determining the adjustable power of one or more refrigeration stations provided below can be found in the aforementioned method for determining the adjustable power of a refrigeration station, and will not be further elaborated here.

[0128] In an exemplary embodiment, Figure 4 As shown, a device for determining adjustable power of a refrigeration station is provided, comprising: a first determining module 410, a first obtaining module 420, a second determining module 430, a third determining module 440 and a processing module 450, wherein:

[0129] A first determining module 410 is configured to determine a target cooling mode corresponding to the cooling station according to the electricity price period to which the current electricity price of the cooling station belongs;

[0130] A first acquisition module 420 is configured to acquire target refrigeration parameters and candidate refrigeration parameters of refrigeration equipment in the refrigeration station, as well as a target refrigeration capacity of the refrigeration station;

[0131] A second determining module 430 is configured to determine a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameters;

[0132] A third determining module 440 is configured to determine a candidate power corresponding to a candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter;

[0133] The first processing module 450 is configured to use the difference between the candidate power and the reference power as the adjustable power of the refrigeration station.

[0134] In one embodiment, the first determination module 410 includes: a first determination unit, which is used to determine that the target cooling mode corresponding to the refrigeration station is the first cooling mode when the electricity price period is in the off-peak period; a second determination unit, which is used to determine that the target cooling mode corresponding to the refrigeration station is the second cooling mode when the electricity price period is in the peak period; wherein, in the first cooling mode, the refrigeration equipment includes a first refrigeration machine equipment; in the second refrigeration mode, the refrigeration equipment includes a second refrigeration machine equipment and an ice melting equipment.

[0135] In one embodiment, when the target cooling mode is the first cooling mode, the target cooling parameter of the refrigeration equipment includes the first water outlet temperature of the first refrigeration equipment; accordingly, the adjustable power determination device of the refrigeration station also includes: a second acquisition module, used to obtain the preset water outlet temperature range corresponding to the first refrigeration equipment; a second processing module, used to use at least one water outlet temperature in the preset water outlet temperature range that is greater than the first water outlet temperature as a candidate cooling parameter of the first refrigeration equipment.

[0136] In one embodiment, when the target cooling mode is the second cooling mode, the target cooling parameter of the refrigeration equipment includes a first ice melting rate of the ice melting equipment; accordingly, the adjustable power determination device of the refrigeration station further includes: a third acquisition module, used to obtain a preset ice melting rate range corresponding to the ice melting equipment; a third processing module, used to use at least one ice melting rate in the preset ice melting rate range that is greater than the first ice melting rate as a candidate cooling parameter of the ice melting equipment.

[0137] In one embodiment, the system further includes: a fourth acquisition module for acquiring the ice storage capacity of the refrigeration station when the target refrigeration mode is the second refrigeration mode; and a fourth determination module for determining, for each adjustable power, the duration of the refrigeration station under the adjustable power based on the ice storage capacity and the candidate refrigeration parameters corresponding to the adjustable power.

[0138] In one embodiment, the system further includes a fitting module for fitting the durations corresponding to different adjustable powers to obtain an evaluation curve of the adjustable capacity of the refrigeration station.

[0139] Each module in the above-mentioned device for determining the adjustable power of a refrigeration station can be implemented in whole or in part through software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0140] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The computer device includes a processor, memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals via wired or wireless means. The wireless means can be implemented via Wi-Fi, a mobile cellular network, near-field communication (NFC), or other technologies. When executed by the processor, the computer program implements a method for determining the adjustable power of a refrigeration station. The display unit of the computer device is used to form a visually visible image and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device casing, or an external keyboard, touchpad or mouse.

[0141] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0142] In one embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0143] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0144] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0145] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0146] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0147] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining the adjustable power of a refrigeration station, characterized in that: The method comprises: Determining a target cooling mode corresponding to the cooling station according to the electricity price period to which the current electricity price of the cooling station belongs; Obtaining target refrigeration parameters of refrigeration equipment in the refrigeration station, candidate refrigeration parameters of the refrigeration equipment, and a target refrigeration capacity of the refrigeration station; determining a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameter; determining, according to the target cooling capacity, the target cooling mode, and the candidate cooling parameters, a candidate power corresponding to the candidate cooling parameters; The difference between the candidate power and the reference power is used as the adjustable power of the refrigeration station.

2. The method according to claim 1, characterized in that The determining, based on the electricity price period of the current electricity price of the refrigeration station, a target refrigeration mode corresponding to the refrigeration station includes: When the electricity price period is in a flat or off-peak period, determining that the target cooling mode corresponding to the refrigeration station is the first cooling mode; When the electricity price period is a peak electricity price period, determining that the target cooling mode corresponding to the refrigeration station is the second cooling mode; Wherein, in the first refrigeration mode, the refrigeration equipment includes a first refrigeration machine; in the second refrigeration mode, the refrigeration equipment includes a second refrigeration machine and an ice melting device.

3. The method according to claim 2, characterized in that When the target cooling mode is the first cooling mode, the target cooling parameter of the refrigeration device includes the first outlet water temperature of the first refrigeration device; accordingly, the candidate cooling parameter of the first refrigeration device is determined according to the following steps: Obtaining a preset outlet water temperature range corresponding to the first chiller device; At least one outlet water temperature in the preset outlet water temperature range that is greater than the first outlet water temperature is used as a candidate refrigeration parameter of the first refrigerator device.

4. The method according to claim 2, characterized in that When the target cooling mode is the second cooling mode, the target cooling parameter of the cooling device includes a first ice melting rate of the ice melting device; Accordingly, the candidate refrigeration parameters of the ice melting equipment are determined according to the following steps: Obtaining a preset ice melting rate range corresponding to the ice melting equipment; At least one ice melting rate in the preset ice melting rate range that is greater than the first ice melting rate is used as a candidate refrigeration parameter of the ice melting equipment.

5. The method according to any one of claims 2 to 4, characterized in that: Also includes: When the target cooling mode is the second cooling mode, obtaining the ice storage capacity of the refrigeration station; For each adjustable power, the duration of time the refrigeration station can last at the adjustable power is determined according to the ice storage capacity and the candidate refrigeration parameters corresponding to the adjustable power.

6. The method according to claim 5, characterized in that Also includes: The durations corresponding to different adjustable powers are fitted to obtain an adjustable capacity evaluation curve of the refrigeration station.

7. A device for determining adjustable power of a refrigeration station, characterized in that: The device comprises: A first determining module is configured to determine a target cooling mode corresponding to the cooling station according to the electricity price period to which the current electricity price of the cooling station belongs; a first acquisition module, configured to acquire target refrigeration parameters of refrigeration equipment in the refrigeration station, candidate refrigeration parameters of the refrigeration equipment, and a target refrigeration capacity of the refrigeration station; a second determining module, configured to determine a reference power of the refrigeration station according to the target cooling capacity, the target cooling mode, and the target cooling parameter; a third determining module, configured to determine a candidate power corresponding to the candidate cooling parameter according to the target cooling capacity, the target cooling mode, and the candidate cooling parameter; The first processing module is configured to use the difference between the candidate power and the reference power as the adjustable power of the refrigeration station.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

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 steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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