Control method, controller, system and medium for load limitation of central air-conditioning system
By calculating the number of operating chillers and the water valve opening, the problem of the inability to accurately control the power consumption of the central air-conditioning system in the existing technology is solved, and accurate adjustment of the power load is achieved.
Patent Information
- Application Number
- CN202510797316.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-13
- Publication Date
- 2025-09-23
AI Technical Summary
In the prior art, it is impossible to precisely control the power consumption of the central air-conditioning system to achieve a specific target by shutting down some chillers.
By obtaining the power consumption limit and current power consumption value, the number of operating chillers and the opening of the water valve are calculated, and precise adjustment of the chillers and water valves can be achieved.
It achieves precise control of the power load of the central air-conditioning system, ensuring that the power consumption value reaches the set limit.
Smart Images
Figure CN120684772A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of air conditioning technology, and in particular to a control method, controller, system and medium for load limitation of a central air conditioning system. Background Art
[0002] In related technologies, chillers are the largest power-consuming devices in central air-conditioning systems. Current air-conditioning systems for large and medium-sized commercial and office buildings generally provide rapid demand response by shutting down some of the running chillers to achieve power consumption regulation. However, shutting down some of the running chillers cannot control the power consumption of the air-conditioning system to a specific target value. Summary of the Invention
[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a control method, controller, system and medium for load limitation of a central air conditioning system, aiming to improve the accuracy of power load adjustment of the central air conditioning system.
[0004] In a first aspect, an embodiment of the present application provides a method for controlling load limitation of a central air conditioning system, wherein the central air conditioning system includes a chiller and a water valve, and the method includes: Get the power consumption limit value and current power consumption value; Calculation is performed based on the power consumption limit value and the current power consumption value to obtain the number of operating units of the chiller and the water valve opening of the water valve.
[0005] According to some embodiments of the present application, the calculating according to the power consumption limit value and the current power consumption value includes at least one of the following: When the power consumption limit value is greater than or less than the current power consumption value, obtaining the full-load operating power of the chiller, calculating the number of operating units of the chiller according to the power consumption limit value and the full-load operating power, and calculating the water valve opening according to the power consumption limit value and the current power consumption value; When the power consumption limit value is equal to the current power consumption value, the current number of operating units of the chiller and the current opening of the water valve are obtained, the number of operating units of the chiller is determined to be the current number of operating units, and the opening of the water valve is determined to be the current opening.
[0006] According to some embodiments of the present application, calculating the number of operating chillers according to the power consumption limit value and the full-load operating power includes: The number of operating units of the chiller is obtained by calculating the number of operating units according to the power consumption limit value and the full-load operating power using a preset calculation formula.
[0007] According to some embodiments of the present application, the calculation formula for the number of running units is: ; Among them, the is the number of running units, is the power consumption limit value, is the full load operating power.
[0008] According to some embodiments of the present application, the calculating the water valve opening according to the power consumption limit value and the current power consumption value includes: Get the current valve opening; Obtaining a valve opening correction value according to the power consumption limit value and the current power consumption value using a preset valve opening correction value calculation formula; The water valve opening is obtained according to the valve opening correction value and the current valve opening using a preset valve opening calculation formula.
[0009] According to some embodiments of the present application, the valve opening correction value calculation formula is: ; described is the valve opening correction value, is the current power consumption value, is the power consumption limit value, is the first preset threshold.
[0010] According to some embodiments of the present application, the valve opening calculation formula is: ; described is the valve opening, is the current valve opening.
[0011] In a second aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein when the processor runs the computer program, the controller executes the control method for load limitation of the central air-conditioning system as described in the first aspect above.
[0012] In a third aspect, an embodiment of the present application provides a central air-conditioning system, comprising the controller as described in the second aspect.
[0013] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the control method for load limitation of a central air-conditioning system as described in the first aspect above.
[0014] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program or computer instructions, wherein the computer program or the computer instructions are stored in a computer-readable storage medium, and a processor of a computer device reads the computer program or the computer instructions from the computer-readable storage medium, and the processor executes the computer program or the computer instructions, so that the computer device executes the control method for load limitation of a central air-conditioning system as described in the first aspect above.
[0015] According to the technical solution of the embodiment of the present application, there are at least the following beneficial effects: the embodiment of the present application proposes a control method, controller, system and medium for load limitation of a central air-conditioning system, which is applied to a central air-conditioning system, wherein the central air-conditioning system includes a chiller and a water valve, and the method includes: obtaining a power consumption limit value and a current power consumption value; and calculating based on the power consumption limit value and the current power consumption value to obtain the number of operating chillers and the water valve opening of the water valve. Because the embodiment of the present application can determine the number of operating chillers and the water valve opening of the water valve based on the power consumption limit value and the current power consumption value, the number of operating chillers and the water valve opening of the water valve can be adjusted, thereby achieving precise control of the power load of the central air-conditioning system.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.
[0018] Figure 1 This is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by one embodiment of the present application; Figure 2 is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by another embodiment of the present application; Figure 3 is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by another embodiment of the present application; Figure 4 is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by another embodiment of the present application; Figure 5 is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by another embodiment of the present application; Figure 6 This is an overall flow chart of a method for controlling load limitation of a central air-conditioning system provided by one embodiment of the present application; Figure 7 This is a structural diagram of a central air-conditioning system provided by an embodiment of the present application; Figure 8 This is a schematic diagram of a controller for executing a control method for load limitation of a central air-conditioning system provided in one embodiment of the present application. DETAILED DESCRIPTION
[0019] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0020] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.
[0021] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.
[0022] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0023] In some cases, the chiller is the largest power-consuming device in the central air-conditioning system. Current air-conditioning systems for large and medium-sized commercial and office buildings generally provide rapid demand response by shutting down some of the running chillers to achieve power consumption regulation. However, shutting down some of the running chillers cannot control the power consumption of the air-conditioning system to a specific target value.
[0024] Based on the above situation, the present application proposes a control method, controller, system and medium for load limitation of a central air-conditioning system, aiming to improve the accuracy of power load adjustment of the central air-conditioning system.
[0025] The following further describes various embodiments of the central air-conditioning system load limiting control method of the present application in conjunction with the accompanying drawings.
[0026] like Figure 1 As shown, Figure 1 This is a flow chart of a method for controlling load limitation of a central air-conditioning system provided by an embodiment of the present application; the method for controlling load limitation of a central air-conditioning system is applied to a central air-conditioning system, and the method includes but is not limited to step S110 and step S120.
[0027] Step S110: Obtain power consumption limit value and current power consumption value; Step S120: Calculate the number of operating chillers and the water valve opening of the water valve according to the power consumption limit value and the current power consumption value.
[0028] In one embodiment, first, a power consumption limit value and a current power consumption value are obtained; second, a calculation is performed based on the power consumption limit value and the current power consumption value to obtain the number of operating chillers and the water valve opening of the water valve. Because the embodiment of the present application can determine the number of operating chillers and the water valve opening of the water valve based on the power consumption limit value and the current power consumption value, the number of operating chillers and the water valve opening of the water valve can be adjusted, thereby achieving precise control of the power load of the central air conditioning system.
[0029] It is understandable that the central air conditioning system includes a chiller and a water valve.
[0030] It can be understood that the number of operating chillers and the water valve opening of the water valve are determined by calculating the power consumption limit value and the current power consumption value, so as to adjust the number of operating chillers and the water valve opening, and then the power consumption value of the central air-conditioning system can be adjusted to the power consumption limit value, thereby improving the accuracy of the power load adjustment of the central air-conditioning system.
[0031] It is understandable that the above-mentioned power consumption limit value can be set by the user, and the embodiment of the present application does not specifically limit it.
[0032] like Figure 2 As shown, Figure 2 This is a flowchart of a control method for load limitation of a central air-conditioning system provided by another embodiment of the present application; regarding the calculation based on the power consumption limit value and the current power consumption value in the above-mentioned step S120, it includes but is not limited to step S210 and step S220.
[0033] Step S210: When the power consumption limit value is greater than or less than the current power consumption value; Step S220: Obtain the full-load operating power of the chiller, calculate the number of operating chillers based on the power consumption limit value and the full-load operating power, and calculate the water valve opening based on the power consumption limit value and the current power consumption value.
[0034] In one embodiment, when the power consumption limit value is greater than or less than the current power consumption value, it indicates that the power consumption value of the central air-conditioning system at this time does not match the set power consumption limit value, so the full-load operating power of the chiller is obtained, and then the number of operating chillers is calculated based on the power consumption limit value and the full-load operating power, and the water valve opening is calculated based on the power consumption limit value and the current power consumption value to adjust the number of operating chillers and the opening of the water valve, so that the power consumption value of the central air-conditioning system can be adjusted to the power consumption limit value, thereby improving the accuracy of the power load adjustment of the central air-conditioning system.
[0035] like Figure 3 As shown, Figure 3 This is a flowchart of a control method for load limitation of a central air-conditioning system provided by another embodiment of the present application; regarding the calculation based on the power consumption limit value and the current power consumption value in the above-mentioned step S120, it includes but is not limited to step S310 and step S320.
[0036] Step S310: When the power consumption limit value is equal to the current power consumption value; Step S320: Obtain the current number of operating chillers and the current opening of the water valve, determine that the number of operating chillers is the current number of operating chillers, and determine that the opening of the water valve is the current opening.
[0037] In one embodiment, when the power consumption limit value is equal to the current power consumption value, it means that there is no need to adjust the number of operating units and the water valve opening of the water valve, so the current number of operating units of the chiller and the current opening of the water valve are obtained, and the number of operating units of the chiller is determined to be the current number of operating units, and the water valve opening is determined to be the current opening.
[0038] like Figure 4 As shown, Figure 4 It is a flowchart of a control method for load limitation of a central air-conditioning system provided by another embodiment of the present application; regarding the above-mentioned step S220 in which the number of operating chillers is calculated based on the power consumption limit value and the full-load operating power, it includes but is not limited to step S410 and step S420.
[0039] Step S410: Calculate the number of running units using a preset formula; Step S420: Calculate the number of operating chillers according to the power consumption limit value and the full-load operating power.
[0040] It can be understood that the above calculation formula for the number of running units is: ;in, is the number of running units, is the power consumption limit, The power is at full load.
[0041] As you can understand, ceil is a function that rounds a number up to the nearest integer.
[0042] like Figure 5 As shown, Figure 5 It is a flowchart of a control method for load limitation of a central air-conditioning system provided by another embodiment of the present application; regarding the water valve opening calculated based on the power consumption limit value and the current power consumption value in the above-mentioned step S220, it includes but is not limited to step S510, step S520 and step S530.
[0043] Step S510, obtaining the current valve opening; Step S520: Obtain a valve opening correction value according to the power consumption limit value and the current power consumption value using a preset valve opening correction value calculation formula; Step S530: Obtain the water valve opening according to the valve opening correction value and the current valve opening using a preset valve opening calculation formula.
[0044] In one embodiment, first, the current valve opening is obtained; then, the valve opening correction value is obtained according to the power consumption limit value and the current power consumption value through a preset valve opening correction value calculation formula, and then the water valve opening is obtained according to the valve opening correction value and the current valve opening through a preset valve opening calculation formula, and then the water valve opening is adjusted to the water valve opening, so as to improve the accuracy of power load adjustment of the central air-conditioning system.
[0045] It can be understood that the above-mentioned calculation formula for the valve opening correction value is: ,in, is the valve opening correction value, is the current power consumption value, The power consumption limit value.
[0046] It can be understood that the above valve opening calculation formula is: ,in, is the valve opening, is the current valve opening, is the first preset threshold.
[0047] It can be understood that the above-mentioned first preset threshold can be set according to actual conditions, and the embodiment of the present application does not specifically limit it.
[0048] Based on the control methods for load limitation of a central air-conditioning system in the above-mentioned embodiments, overall embodiments of the control methods for load limitation of a central air-conditioning system of the present application are respectively proposed below.
[0049] like Figure 6 As shown, Figure 6This is an overall flow chart of a method for controlling load limitation of a central air-conditioning system provided by an embodiment of the present application.
[0050] The embodiment of the present application integrates a chiller limit control algorithm and a power regulation control algorithm. When receiving a power consumption limit task from the power grid or load aggregator, the chiller start-stop control algorithm will re-determine the number of running chillers based on the power consumption limit value; the calculation formula for the number of running chillers is: .in is the power consumption limit, It is the number of chillers that are kept in operation during the period of demand limitation of the central air-conditioning system. It is the full load operating power of a single chiller. is a function that rounds a number up to the nearest integer; by implementing this chiller limit control algorithm, a rapid power consumption limit effect can be achieved, and the power consumption of the central air-conditioning system can be roughly controlled to be close to the set value when demand limitation begins.
[0051] Subsequently, the power regulation control algorithm will be activated to accurately adjust the actual power consumption of the system. It adjusts the water valve opening of the air handling unit, thereby affecting the chilled water flow of the chilled water system to accurately control the system power consumption close to the set value. At time t, through the formula Calculate the valve opening of chiller i for air handling, where is the valve opening, is the current valve opening, The valve opening correction value is calculated by the formula Calculated, where is the current power consumption value, is the power consumption limit, It is the first preset threshold and can be set according to actual needs.
[0052] like Figure 7 As shown, Figure 7 This is a structural diagram of a central air-conditioning system provided in one embodiment of the present application.
[0053] The load-limiting control method for a central air conditioning system disclosed herein can be applied to central air conditioning systems to precisely control the air conditioning system's power consumption within a target value. During normal control periods, the valves of the air handling units (AHUs) are controlled to meet a specific supply air temperature set point. During demand-limited periods, the hierarchical optimization control method proposed in this disclosure adjusts the number of operating chillers and the water valve openings of the AHUs based on the power consumption limits set by the power grid or load aggregator and the measured current power consumption of the system, thereby precisely controlling the AHU power consumption within the target value.
[0054] Based on the control methods for load limitation of the central air-conditioning system in the above-mentioned embodiments, various embodiments of the controller, central air-conditioning system, computer-readable storage medium and computer program product of the present application are respectively proposed below.
[0055] like Figure 8 As shown, Figure 8 Schematic diagram of a controller for executing a control method for limiting the load of a central air conditioning system according to an embodiment of the present application. The controller 700 implemented in the present application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein: Figure 8 In the figure, a processor 710 and a memory 720 are taken as an example.
[0056] The processor 710 and the memory 720 may be connected via a bus or other means. Figure 8 The bus connection is taken as an example.
[0057] The memory 720 is a non-transitory computer-readable storage medium that can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 720 may include a high-speed random access memory and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 may optionally include a memory 720 remotely located relative to the processor 710, and these remote memories 720 may be connected to the controller 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.
[0058] Those skilled in the art will understand that Figure 8 The device structure shown in the figure does not constitute a limitation on the controller 700, and the controller 700 may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
[0059] exist Figure 8 In the illustrated controller 700, processor 710 can be used to invoke a control program stored in memory 720 to implement the aforementioned central air conditioning system load limiting control method. Specifically, the non-transient software program and instructions required to implement the aforementioned central air conditioning system load limiting control method are stored in memory 720. When executed by processor 710, the aforementioned central air conditioning system load limiting control method is implemented.
[0060] It is worth noting that since the controller 700 of the embodiment of the present application can execute the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the controller 700 of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments.
[0061] In addition, an embodiment of the present application further provides a central air-conditioning system, which includes the controller of the above embodiment.
[0062] It is worth noting that since the central air-conditioning system of the embodiment of the present application includes the controller of the above embodiment, and the controller of the above embodiment is capable of executing the control method for load limitation of the central air-conditioning system of any of the above embodiments, the specific implementation methods and technical effects of the central air-conditioning system of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method for load limitation of the central air-conditioning system of any of the above embodiments.
[0063] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions for executing the above-mentioned central air-conditioning system load limit control method. Figures 1 to 5 The method steps in .
[0064] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments.
[0065] In addition, an embodiment of the present application further provides a computer program product, including a computer program or computer instructions, the computer program or computer instructions being stored in a computer-readable storage medium, the processor of a computer device reading the computer program or computer instructions from the computer-readable storage medium, and the processor executing the computer program or computer instructions, so that the computer device executes the above-described control method for limiting the load of a central air-conditioning system. For example, the above-described Figures 1 to 5 The method steps in .
[0066] It is worth noting that since the computer program product of the embodiment of the present application can execute the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer program product of the embodiment of the present application can refer to the specific implementation methods and technical effects of the control method for load limitation of the central air-conditioning system of any of the above-mentioned embodiments.
[0067] Those skilled in the art will appreciate that all or some of the steps and systems disclosed above can be implemented as software, firmware, hardware, or any suitable combination thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is well known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. Furthermore, as is well known to those skilled in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.
[0068] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.
[0069] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the scheme of this embodiment.
[0070] It should also be understood that the various implementation methods provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.
[0071] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the art can also make various equivalent modifications or substitutions under the shared conditions that do not violate the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.
Claims
1. A method for controlling load limitation of a central air-conditioning system, characterized in that: Applied to a central air conditioning system, the central air conditioning system includes a chiller and a water valve, and the method includes: Get the power consumption limit value and current power consumption value; Calculation is performed based on the power consumption limit value and the current power consumption value to obtain the number of operating units of the chiller and the water valve opening of the water valve.
2. The method according to claim 1, characterized in that The calculating according to the power consumption limit value and the current power consumption value includes at least one of the following: When the power consumption limit value is greater than or less than the current power consumption value, obtaining the full-load operating power of the chiller, calculating the number of operating units of the chiller according to the power consumption limit value and the full-load operating power, and calculating the water valve opening according to the power consumption limit value and the current power consumption value; When the power consumption limit value is equal to the current power consumption value, the current number of operating units of the chiller and the current opening of the water valve are obtained, the number of operating units of the chiller is determined to be the current number of operating units, and the opening of the water valve is determined to be the current opening.
3. The method according to claim 2, characterized in that The calculating the number of operating chillers according to the power consumption limit value and the full-load operating power includes: The number of operating units of the chiller is obtained by calculating the number of operating units according to the power consumption limit value and the full-load operating power using a preset calculation formula.
4. The method according to claim 2, characterized in that The calculation formula for the number of running units is: ； Among them, the is the number of running units, is the power consumption limit value, is the full load operating power.
5. The method according to claim 2, characterized in that The calculating the water valve opening according to the power consumption limit value and the current power consumption value includes: Get the current valve opening; Obtaining a valve opening correction value according to the power consumption limit value and the current power consumption value using a preset valve opening correction value calculation formula; The water valve opening is obtained according to the valve opening correction value and the current valve opening using a preset valve opening calculation formula.
6. The method according to claim 5, characterized in that The calculation formula of the valve opening correction value is: ； described is the valve opening correction value, is the current power consumption value, is the power consumption limit value, is the first preset threshold.
7. The method according to claim 6, characterized in that The valve opening calculation formula is: ； described is the valve opening, is the current valve opening.
8. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the control method for load limitation of a central air-conditioning system according to any one of claims 1 to 7 when executing the computer program.
9. A central air conditioning system, characterized in that: Comprising the controller as claimed in claim 8.
10. A computer-readable storage medium, characterized in that: Computer-executable instructions are stored, and the computer-executable instructions are used to execute the control method for load limitation of a central air-conditioning system according to any one of claims 1 to 7.