Energy-saving control method, equipment and power supply system

Abstract

The invention provides an energy-saving control method, equipment and a power supply system, which are applied to a virtual power plant power supply system, and the power supply system comprises rectifier modules. And determining the number of target rectification modules and the AC power limit value thereof according to the AC power total limit value provided for each rectification module and the high-efficiency working range of each rectification module. And issuing a first starting command and a first power limiting command to the target rectification module, so that the target rectification module operates without exceeding the respective AC power limiting value. And during operation of the target rectification modules, obtaining the load rate of each target rectification module, and adjusting the number of the target rectification modules according to the load rate of each target rectification module and the high-efficiency working range thereof. A rectifier module dormancy energy-saving technology is combined with virtual power plant scheduling response, and a rectifier module energy-saving method in a virtual power plant application scene is provided, so that the rectifier module works in a high-efficiency range, the energy-saving function is more effectively played, and the utilization efficiency of site energy is improved.

Description

Technical Field

[0001] This application relates to the technical field of energy-saving control, and particularly to an energy-saving control method, device, and power supply system. Background Art

[0002] With the increase in the installed capacity of new energy sources such as wind energy and solar energy, and the development of energy storage technologies represented by lithium batteries, virtual power plants have begun to move from theory to practice, and some provinces and cities have carried out pilots for virtual power plants.

[0003] In the application scenario of a virtual power plant, a site can participate in the load dispatching of the virtual power plant as an adjustable load. The common practice is to receive instructions from the dispatching platform and limit the power of the rectifier module during specific periods, and the batteries configured in the site bear part of the load, so as to achieve the dispatching response to the virtual power plant. However, how to improve the energy utilization efficiency of the site and make the rectifier module achieve the purpose of energy saving has inevitably become the focus of attention in energy-saving control. Summary of the Invention

[0004] This application provides an energy-saving control method, device, and power supply system, which are used to provide an energy-saving solution for rectifier modules in the application scenario of a virtual power plant.

[0005] In a first aspect, this application provides an energy-saving control method, which is applied to a virtual power plant power supply system, and the power supply system includes each rectifier module; the method includes:

[0006] Obtain the total limit value of the AC power provided for each rectifier module, and determine the number of target rectifier modules and the AC power limit value of each target rectifier module according to the total limit value of the AC power and the high-efficiency operating range of each rectifier module;

[0007] Send a first start command and a first power limit command to the target rectifier module, so that the target rectifier module responds to the first start command and the first power limit command to operate without exceeding its respective AC power limit value;

[0008] During the operation of the target rectifier module, obtain the load rate of each target rectifier module, and adjust the number of target rectifier modules according to the load rate of each target rectifier module and its high-efficiency operating range.

[0009] In a possible design, the determining the number of target rectifier modules and the AC power limit value of each target rectifier module according to the total limit value of the AC power and the high-efficiency operating range of each rectifier module includes:

[0010] According to the high-efficiency operating range of each rectifier module in the power supply system, determine the AC power range consumed by different numbers of rectifier modules, and sort the AC power ranges to obtain an AC power range sequence;

[0011] Scan the AC power range sequence to obtain a target AC power range that matches the total AC power limit, and determine the number of rectifier modules corresponding to the target AC power range as the number of target rectifier modules;

[0012] Determine the AC power limit of each target rectifier module according to the total AC power limit according to a preset allocation strategy.

[0013] In a possible design, sorting the AC power ranges to obtain an AC power range sequence includes:

[0014] Sort the AC power ranges in descending order of the number of rectifier modules to obtain the AC power range sequence;

[0015] Wherein, the first data in the AC power range sequence refers to the AC power range consumed by all rectifier modules corresponding to the high-efficiency operating range of all rectifier modules when all rectifier modules in the power supply system are turned on;

[0016] The last data in the AC power range sequence refers to the AC power range consumed by one rectifier module corresponding to the high-efficiency operating range of the one rectifier module when only one rectifier module is turned on in the power supply system.

[0017] In a possible design, the obtaining of the target AC power range that matches the total AC power limit includes:

[0018] In the AC power range sequence, obtain the first AC power range that includes the total AC power limit, and determine the obtained AC power range as the target AC power range.

[0019] In a possible design, before sending the first turn-on command and the first power limit command to the target rectifier module, it further includes:

[0020] If it is determined that the total AC power limit is greater than the upper limit of the first data in the AC power range sequence, send a second turn-on command to all rectifier modules in the power supply system to turn on all rectifier modules;

[0021] If it is determined that the total AC power limit value is less than the lower limit of the last data in the AC power range sequence, a third start command is sent to a preset number of rectifier modules in the power supply system to start the preset number of rectifier modules, where the preset number is the lower limit number of rectifier modules.

[0022] In a possible design, the adjusting the number of target rectifier modules according to the load rate of each target rectifier module and its high-efficiency operating range includes:

[0023] If it is determined that the number of target rectifier modules is greater than the preset number, it is judged whether the load rate of the current target rectifier module is less than the lower limit threshold of the high-efficiency operating range of the current target rectifier module;

[0024] If so, one or more rectifier modules with the lowest efficiency in the target rectifier modules are preferentially turned off according to the efficiency identifier, where the efficiency identifier is used to identify the energy conversion efficiency of the target rectifier module;

[0025] Repeat the above judgment steps until the number of the target rectifier modules in operation reaches the preset number.

[0026] In a possible design, after each time one or more rectifier modules with the lowest efficiency in the target rectifier modules are turned off, it further includes:

[0027] Determine the AC power limit value of each candidate rectifier module according to the total AC power limit value according to the preset distribution strategy, where the candidate rectifier module refers to the remaining target rectifier modules after each turn-off operation;

[0028] Send a fourth start command and a second power limit command to each candidate rectifier module, so that each candidate rectifier module responds to the fourth start command and the second power limit command to operate without exceeding its respective AC power limit value.

[0029] In a possible design, the high-efficiency operating range is characterized by any one of the upper and lower limit values of the high-efficiency operating interval, the best operating point, and the load fluctuation ratio.

[0030] In a possible design, the power supply system further includes a battery, and the battery is connected in parallel to the DC busbar;

[0031] When all the rectifier modules are started, some of the all rectifier modules charge the battery;

[0032] When the preset number of rectifier modules are started, the battery discharges to share the load.

[0033] Second aspect, the present application provides an energy-saving control device, which is applied to a virtual power plant power supply system, and the power supply system includes each rectification module; the device includes:

[0034] An acquisition and processing module, configured to acquire the total AC power limit provided for each rectification module, and determine the number of target rectification modules and the AC power limit of each target rectification module according to the total AC power limit and the high-efficiency operating range of each rectification module;

[0035] A sending module, configured to send a first start command and a first power limit command to the target rectification module, so that the target rectification module responds to the first start command and the first power limit command to operate without exceeding its respective AC power limit;

[0036] A control module, configured to acquire the load rate of each target rectification module during the operation of the target rectification module, and adjust the number of target rectification modules according to the load rate of each target rectification module and its high-efficiency operating range.

[0037] In a possible design, the acquisition and processing module includes:

[0038] A sequence generation module, configured to determine the AC power range required for different numbers of rectification modules according to the high-efficiency operating range of each rectification module in the power supply system, and sort the AC power ranges to obtain an AC power range sequence;

[0039] A number determination module, configured to scan the AC power range sequence, acquire the target AC power range matching the total AC power limit, and determine the number of rectification modules corresponding to the target AC power range as the number of target rectification modules;

[0040] A power determination module, configured to determine the AC power limit of each target rectification module according to the total AC power limit according to a preset distribution strategy.

[0041] In a possible design, the sequence generation module is further configured to:

[0042] Sort the AC power ranges in descending order of the number of rectification modules to obtain the AC power range sequence;

[0043] Wherein, the first data in the AC power range sequence refers to the AC power range consumed by all rectification modules corresponding to the high-efficiency operating range of all rectification modules when all rectification modules in the power supply system are turned on;

[0044] The last data in the AC power range sequence refers to the AC power range consumed by the one rectification module within the high-efficiency operating range of the one rectification module when only one rectification module in the power supply system is turned on.

[0045] In a possible design, the number determination module is further configured to:

[0046] In the AC power range sequence, obtain the first AC power range that includes the total AC power limit value, and determine the obtained AC power range as the target AC power range.

[0047] In a possible design, the sending module is further configured to:

[0048] If it is determined that the total AC power limit value is greater than the upper limit of the first data in the AC power range sequence, send a second turn-on command to all the rectification modules in the power supply system to turn on all the rectification modules;

[0049] If it is determined that the total AC power limit value is less than the lower limit of the last data in the AC power range sequence, send a third turn-on command to a preset number of rectification modules in the power supply system to turn on the preset number of rectification modules, where the preset number is the lower limit number of rectification modules.

[0050] In a possible design, the control module is specifically configured to:

[0051] If it is determined that the number of the target rectification modules is greater than the preset number, determine whether the load rate of the current target rectification module is less than the lower threshold of the high-efficiency operating range of the current target rectification module;

[0052] If so, preferentially turn off one or more of the lowest-efficiency rectification modules in the target rectification modules according to the efficiency identifier, where the efficiency identifier is used to identify the energy conversion efficiency of the target rectification module;

[0053] Repeat the above determination steps until the number of the target rectification modules in operation reaches the preset number.

[0054] In a possible design, the power determination module is further configured to determine the AC power limit value of each candidate rectification module according to the total AC power limit value according to the preset distribution strategy, where the candidate rectification module refers to the remaining target rectification modules after each turn-off operation;

[0055] The sending module is further configured to send a fourth turn-on command and a second power limit command to each candidate rectification module, so that each candidate rectification module responds to the fourth turn-on command and the second power limit command to operate without exceeding its respective AC power limit value.

[0056] In a third aspect, the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0057] The memory stores computer-executable instructions;

[0058] The processor executes the computer-executable instructions stored in the memory to implement any one of the possible energy-saving control methods provided in the first aspect.

[0059] In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement any one of the possible energy-saving control methods provided in the first aspect.

[0060] In a fifth aspect, the present application provides a computer program product, including computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement any one of the possible energy-saving control methods provided in the first aspect.

[0061] In a sixth aspect, the present application provides a virtual power plant power supply system, including: a dispatching platform and each rectification module; the dispatching platform is used to implement any one of the possible energy-saving control methods provided in the first aspect.

[0062] The present application provides an energy-saving control method, device and power supply system. The energy-saving control method can be applied to a virtual power plant power supply system, and the power supply system includes each rectification module. First, obtain the total limit value of the AC power provided for each rectification module, and determine the number of target rectification modules and their AC power limit values according to the total limit value of the AC power and the high-efficiency working range of each rectification module. Then send a first start command and a first power limit command to the target rectification modules, so that the target rectification modules respond to the first start command and the first power limit command to operate without exceeding their respective AC power limit values. During the operation of the target rectification modules, obtain the load rate of each target rectification module, and adjust the number of target rectification modules according to the load rate of each target rectification module and its high-efficiency working range. By combining the rectification module sleep energy-saving technology with the virtual power plant dispatching response, an energy-saving method for rectification modules in the virtual power plant application scenario is proposed. By dynamically switching the rectification modules, the effect of dynamically adjusting the load rate of the rectification modules is achieved, so that the rectification modules work in the high-efficiency range, more effectively exert the energy-saving function, and further improve the energy utilization efficiency of the site. In addition, the application range of the rectification module energy-saving technology can be expanded. Description of the Drawings

[0063] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0064] Figure 1 Schematic diagram of the architecture of a power supply system provided by an embodiment of the present application;

[0065] Figure 2 Schematic flow chart of an energy-saving control method provided by an embodiment of the present application;

[0066] Figure 3 Schematic flow chart of another energy-saving control method provided by an embodiment of the present application;

[0067] Figure 4 Schematic diagram of the structure of an energy-saving control device provided by an embodiment of the present application;

[0068] Figure 5 Schematic diagram of the structure of an acquisition and processing module provided by an embodiment of the present application;

[0069] Figure 6 Schematic diagram of the structure of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0070] Here, the exemplary embodiments will be described in detail, and the examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of methods and devices consistent with some aspects of the present application as detailed in the appended claims.

[0071] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above accompanying drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0072] Explanation of related terms:

[0073] Virtual power plant dispatching response: The site can participate in the load dispatching of the virtual power plant as a dispatchable resource. The virtual power plant dispatching platform issues a power limit instruction to the site based on the power balance in the system. The site restricts the use of municipal power by adjusting the rectification module to achieve the virtual power plant dispatching response.

[0074] Sleep energy saving: The energy conversion efficiency of the rectification module is related to the load rate. By controlling the on / off of the rectification module in combination with the load situation, the rectification module works in a high-efficiency range, thus achieving energy saving.

[0075] In the application scenario of the virtual power plant, the site can participate in the load dispatching of the virtual power plant as an adjustable load. The common method is to receive instructions from the dispatching platform and limit the power of the rectification module during specific periods. The battery configured in the site undertakes part of the load, thus achieving the dispatching response to the virtual power plant. However, how to improve the energy utilization efficiency of the site and make the rectification module achieve the purpose of energy saving has inevitably become the focus of attention in energy-saving control.

[0076] In view of the above problems existing in the prior art, the present application provides an energy-saving control method, device and power supply system. The energy-saving control method is applied to the virtual power plant power supply system, and the power supply system includes each rectification module. The inventive concept of the energy-saving control method provided by the present application lies in: combining the rectification module sleep energy-saving technology with the virtual power plant dispatching response, adjusting the number of rectification modules allowed to work by the load rate and its high-efficiency working range of the rectification modules allowed to work in the system, so that the rectification modules running in the system are in the high-efficiency working range, thereby achieving the energy-saving purpose of the rectification module in the virtual power plant scenario and improving the energy utilization efficiency of the virtual power plant site.

[0077] Figure 1 It is a schematic diagram of the architecture of a power supply system provided by an embodiment of the present application. As shown in the figure, the power supply system in the virtual power plant scenario includes: a monitoring unit 101, each rectification module, and a battery 103. Each rectification module is, for example, rectification module 1021, rectification module 1022, and rectification module 1023, etc. Among them, each rectification module is powered by the municipal power and outputs direct current. The battery 103 is connected in parallel to the DC busbar. When the municipal power supply is insufficient, the battery 103 discharges to undertake part or all of the load 200; when the municipal power supply is sufficient, the rectification module in operation charges the battery 103 to replenish the energy of the battery 103 in time.

[0078] The monitoring unit 101 can be configured as a dispatching platform of the virtual power plant to execute the energy-saving control method provided by the embodiments of the present application. By combining the rectifier module dormancy energy-saving technology with the virtual power plant dispatching response, an energy-saving method for rectifier modules in the virtual power plant application scenario is proposed. By switching the rectifier modules, the rectifier modules can work in the high-efficiency range, more effectively exert the energy-saving function, and improve the utilization efficiency of the site energy.

[0079] In a possible design, the power supply system may further include other system components such as the photovoltaic module 104. In actual working conditions, the power supply system deploys the system components it includes according to the actual working conditions. The embodiments of the present application do not limit the specific content of the system components.

[0080] It should be noted that the above system architecture is only illustrative. The energy-saving control method provided by the embodiments of the present application includes but is not limited to the above system architecture.

[0081] Figure 2 It is a schematic flowchart of an energy-saving control method provided by the embodiments of the present application. As Figure 2 shown, the energy-saving control method provided by the embodiments of the present application includes:

[0082] S101: Obtain the total AC power limit value provided for each rectifier module.

[0083] S102: Determine the number of target rectifier modules and the AC power limit value of each target rectifier module according to the total AC power limit value and the high-efficiency working range of each rectifier module.

[0084] The commercial power supplies power to each rectifier module set in the power supply system, and the power limit value of the alternating current provided by the commercial power supply is the total AC power limit value provided by the commercial power supply for each rectifier module. Then, according to the total AC power limit value and the high-efficiency working range of each rectifier module, the number of rectifier modules that can work in the high-efficiency working range supported by the total AC power limit value and the AC power limit value of each rectifier module that works in the high-efficiency working range are determined. Accordingly, the target rectifier modules can be determined.

[0085] Among them, the rectifier modules that can work in the high-efficiency working range supported by the total AC power limit value are defined as target rectifier modules.

[0086] For example, there are N rectifier modules set in the power supply system, N is an integer greater than or equal to 1, and the N rectifier modules are Figure 1Each rectification module in []. Steps S101 and S102 are used to determine the number n of rectification modules among the N rectification modules that can operate within the high-efficiency operating range under the total AC power limit, and the AC power limit of each rectification module among the n rectification modules. Here, n is less than or equal to N. Each rectification module among the N rectification modules corresponds to its own high-efficiency operating range. The high-efficiency operating ranges of the N rectification modules are related to parameters such as their respective specifications and load ratios.

[0087] In some embodiments, the high-efficiency operating range of each rectification module in the power supply system can be characterized by any one of the upper and lower limits of the high-efficiency operating interval, the optimal operating point, and the load fluctuation ratio. For example, the high-efficiency operating interval upper and lower limits indicate that the high-efficiency operating range is 70%-90%. Additionally, it should be noted that the high-efficiency operating ranges of each rectification module in the power supply system can be different.

[0088] S103: Compare the total AC power limit with the upper limit of the first data and the lower limit of the last data in the AC power range sequence.

[0089] If it is determined that the total AC power limit is greater than the upper limit of the first data in the AC power range sequence, indicating that if all rectification modules in the power supply system are fully turned on and these all rectification modules operate within the high-efficiency operating range, it will not exceed the total AC operating limit provided by the mains power, then execute step S104a.

[0090] S104a: Send a second turn-on command to all rectification modules in the power supply system to turn on all rectification modules.

[0091] The scheduling platform sends a second turn-on command to all rectification modules in the power supply system to turn on all rectification modules.

[0092] In step S103, if it is determined that the total AC power limit is less than the lower limit of the last data in the AC power range sequence, indicating that the total AC power limit cannot meet the condition for the rectification modules to operate within the high-efficiency operating range, then execute step S104b.

[0093] S104b: Send a third turn-on command to a preset number of rectification modules in the power supply system to turn on the preset number of rectification modules.

[0094] The scheduling platform sends a third turn-on command to a preset number of rectification modules in the power supply system to turn on the preset number of rectification modules.

[0095] In step S103, if it is determined that the total AC power limit is less than or equal to the upper limit of the first data in the AC power range sequence and greater than or equal to the lower limit of the last data in the AC power range series, then execute step S104c and subsequent steps.

[0096] S104c: Send the first activation command and the first power limit command to the target rectifier module, so that the target rectifier module responds to the first activation command and the first power limit command and operates without exceeding its respective AC power limit.

[0097] After determining the rectifier modules that can operate within the high-efficiency operating range under the total AC power limit, their number, and the AC power limits, further, the dispatching platform of the virtual power plant can send the first activation command and the first power limit command to the rectifier modules determined in the above steps that can operate within the high-efficiency operating range, that is, send the first activation command and the first power limit command to each target rectifier module. Each target rectifier module then responds to the first activation command to start and responds to the first power limit command to operate without exceeding its own AC power limit.

[0098] It can be understood that the first activation command is used to activate each target rectifier module, and the first power limit command is used to instruct the target rectifier module to operate without exceeding its own AC power limit. It can be understood that each target rectifier module is each rectifier module among the n rectifier modules.

[0099] S105: During the operation of the target rectifier module, obtain the load rate of each target rectifier module, and adjust the number of target rectifier modules according to the load rate of each target rectifier module and its high-efficiency operating range.

[0100] Through step S104c, each target rectifier module is in operation after being activated. And the energy conversion efficiency of the rectifier module in operation is related to its load rate. Therefore, the number of rectifier modules in operation can be controlled in combination with the actual load rate situation during operation, so that the rectifier modules in operation work within the high-efficiency operating range to achieve energy conservation. Therefore, on the basis of the above virtual power plant dispatching response, the rectifier module sleep energy-saving technology is applied to further adjust the number of target rectifier modules.

[0101] Specifically, the load rate of each target rectifier module can be obtained, and then for each target rectifier module, according to the current load rate of the target rectifier module and its current high-efficiency operating range, one or more low-efficiency target rectifier modules in operation are turned off to achieve the energy-saving effect in the rectifier module sleep energy-saving technology.

[0102] For example, when it is determined that the load rate of a target rectifier module is less than the lower threshold of its high-efficiency operating range, and the number of target rectifier modules in operation is greater than the lower limit number of rectifier modules for operation, one or more low-efficiency target rectifier modules can be turned off, effectively exerting the energy-saving function of the rectifier module and improving the energy utilization rate of the site. The lower limit number of rectifier modules is the minimum number of rectifier modules that need to be operating in the power supply system, and its specific value is determined according to the specific working conditions. For example, the lower limit number of rectifier modules can be 1, or 2, or other numbers.

[0103] It can be understood that each rectifier module set in the power supply system can be determined as a low-efficiency or high-efficiency rectifier module according to its rated power. Low-efficiency or high-efficiency refers to the energy conversion efficiency of the rectifier module, and the energy conversion efficiency can be identified by an efficiency label. Optionally, there may be a situation where rectifier modules with different rated powers are mixed and inserted in the power supply system, that is, a situation where low-efficiency rectifier modules and high-efficiency rectifier modules are mixed and inserted.

[0104] In a possible design, when performing the turn-off operation, low-efficiency rectifier modules can be preferentially turned off to ensure that high-efficiency rectifier modules work first. If there is no situation where low-efficiency and high-efficiency rectifier modules are mixed and inserted, when it is determined that an operation to turn off rectifier modules is required, any one or more target rectifier modules can be selected for turning off.

[0105] The energy-saving control method provided by the embodiments of this application can be applied to a virtual power plant power supply system, and the power supply system includes each rectifier module. Obtain the total limit value of the AC power provided for each rectifier module, and determine the number of target rectifier modules and their AC power limit values according to the total limit value of the AC power and the high-efficiency operating range of each rectifier module. Send a first turn-on command and a first power limit command to the target rectifier modules, so that the target rectifier modules respond to the first turn-on command and the first power limit command to operate without exceeding their respective AC power limit values. During the operation of the target rectifier modules, obtain the load rate of each target rectifier module, and adjust the number of target rectifier modules according to the load rate of each target rectifier module and its high-efficiency operating range. Combining the rectifier module sleep energy-saving technology with the virtual power plant dispatching response, a rectifier module energy-saving method in the virtual power plant application scenario is proposed. By switching the rectifier modules, the rectifier modules work in the high-efficiency range, more effectively exerting the energy-saving function, improving the energy utilization efficiency of the site, and also expanding the application range of the rectifier module energy-saving technology.

[0106] Figure 3 It is a schematic flowchart of another energy-saving control method provided by the embodiments of this application. As Figure 3 shown, the energy-saving control method provided by the embodiments of this application includes:

[0107] S201: Obtain the total limit value of the AC power provided for each rectifier module.

[0108] The possible implementation methods, principles, and technical effects of step S201 are similar to those of step S101. For detailed content, reference can be made to the foregoing description and will not be elaborated here.

[0109] S202: According to the high-efficiency operating range of each rectifier module in the power supply system, determine the AC power ranges consumed by different numbers of rectifier modules, and sort the AC power ranges to obtain an AC power range sequence.

[0110] Each rectifier module set in the power supply system has its corresponding high-efficiency operating range. Based on the high-efficiency operating ranges of each rectifier module in the power supply system, determine the AC power ranges consumed by different numbers of rectifier modules.

[0111] For example, as Figure 2 described, if there are N rectifier modules set in the power supply system, then based on the high-efficiency operating ranges of these N rectifier modules respectively, determine the AC power range consumed when N rectifier modules are turned on, the AC power range consumed when N - 1 rectifier modules are turned on, the AC power range consumed when N - 2 rectifier modules are turned on, etc., until the AC power range consumed by the rectifier module when only one rectifier module is turned on.

[0112] After respectively determining the AC power ranges consumed by different numbers of rectifier modules, then sort the determined AC power ranges to obtain a sequence of each AC power module, and define this sequence as the AC power range sequence.

[0113] For example, the AC power ranges can be sorted in descending order according to the number of rectifier modules corresponding to each AC power range to obtain the AC power range sequence. Among them, the first data in the AC power range sequence is the AC power range consumed by all rectifier modules corresponding to the high-efficiency operating ranges of all rectifier modules when all rectifier modules in the power supply system are turned on; the last data in the AC power range sequence is the AC power range consumed by the one rectifier module corresponding to the high-efficiency operating range of this one rectifier module when only one rectifier module is turned on in the power supply system.

[0114] S203: Scan the AC power range sequence, obtain the target AC power range that matches the total AC power limit value, and determine the number of rectifier modules corresponding to the target AC power range as the number of target rectifier modules.

[0115] Scan the AC power range sequence, and from the AC power range sequence, obtain the first data including the total AC power limit value, that is, find the first AC power range in the AC power range sequence that satisfies that the total AC power limit value can fall within the AC power range, that is, the total AC power limit value is within the found AC power range, indicating that the found AC power range matches the total AC power limit value. Determine the obtained data, that is, the found AC power range, as the target AC power range.

[0116] The AC power range sequence is sorted according to the AC power ranges required by different numbers of rectifier modules. Therefore, based on the AC power range sequence, it can be known which rectifier modules and their numbers correspond to each AC power range in the sequence, and each rectifier module can be uniquely identified by a module identifier. Therefore, when the target AC power range is determined from the AC power range sequence, the rectifier module corresponding to the target AC power range is determined as the target rectifier module, and the number of rectifier modules corresponding to the target AC power range is the number of target rectifier modules. The determined target rectifier module is the rectifier module to be turned on in the subsequent steps.

[0117] S204: Determine the AC power limit value of each target rectifier module according to the total AC power limit value according to a preset distribution strategy.

[0118] Determine the number of target rectifier modules, and distribute the total AC power limit value according to a preset distribution strategy to allocate an AC power limit value to each target rectifier module. For example, the preset distribution strategy can be an average distribution, and the total AC power limit value is evenly distributed to each target rectifier module. The AC power limit value of each target rectifier module is the result obtained by dividing the total AC power limit value by the number of target rectifier modules. In actual working conditions, the preset distribution strategy can also be other proportional distributions, not just an average distribution, and the embodiments of this application do not limit this.

[0119] So far, through steps S202 to S204, the target rectifier module, its number, and the AC power limit value of each target rectifier module can be determined according to the total AC power limit value and the high-efficiency operating ranges of each rectifier module.

[0120] S205: Compare the total AC power limit value with the upper limit of the first data and the lower limit of the last data in the AC power range sequence.

[0121] If it is determined that the total AC power limit value is greater than the upper limit of the first data in the AC power range sequence, it means that if all the rectifier modules in the power supply system are turned on and these all rectifier modules operate within the high-efficiency operating range, it will not exceed the total AC power limit provided by the mains power, then execute step S206a.

[0122] S206a: Send the second start command to all rectifier modules in the power supply system to start all rectifier modules.

[0123] The dispatching platform sends the second start command to all rectifier modules in the power supply system to start all rectifier modules.

[0124] In step S205, if it is determined that the total AC power limit value is less than the lower limit of the last data in the AC power range sequence, indicating that the total AC power limit value cannot meet the condition for the rectifier module to operate in the high-efficiency working range, then step S206b is executed.

[0125] S206b: Send the third start command to a preset number of rectifier modules in the power supply system to start the preset number of rectifier modules.

[0126] The dispatching platform sends the third start command to a preset number of rectifier modules in the power supply system to start the preset number of rectifier modules.

[0127] In step S205, if it is determined that the total AC power limit value is less than or equal to the upper limit of the first data in the AC power range sequence and greater than or equal to the lower limit of the last data in the AC power range sequence, then step S206c and subsequent steps are executed.

[0128] S206c: Send the first start command and the first power limit command to the target rectifier modules, so that the target rectifier modules respond to the first start command and the first power limit command to operate without exceeding their respective AC power limit values.

[0129] The possible implementation methods, principles and technical effects of step S206c are similar to those of step S103. For detailed content, please refer to the foregoing description and will not be elaborated here.

[0130] S207: During the operation of the target rectifier modules, obtain the load rate of each target rectifier module.

[0131] After starting the target rectifier modules, each target rectifier module is in operation, and the load rate of each target rectifier module is obtained during the operation.

[0132] S208: If it is determined that the number of target rectifier modules is greater than the preset number, determine whether the load rate of the current target rectifier module is less than the lower limit threshold of the high-efficiency working range of the current target rectifier module.

[0133] When it is determined that the number of target rectifier modules is greater than the preset number, for each target rectifier module, it is judged whether the load rate of the current target rectifier module is less than the lower threshold of the high-efficiency operating range of the current target rectifier module. The preset number refers to the lower limit number of rectifier modules. If the judgment result is yes, it means that the load rate of the current target rectifier module can be further increased and the current target rectifier module can be ensured to operate within the high-efficiency operating range, and step S209 can be further executed; on the contrary, if the judgment result is no, that is, the load rate of the current target rectifier module is greater than or equal to the lower threshold of the high-efficiency operating range of the current target rectifier module, it means that there is no room for improvement in the load rate while ensuring that the current target rectifier module is within the high-efficiency operating range. Therefore, step S2010 is executed to keep the target rectifier modules running at the preset number.

[0134] In addition, if it is determined that the number of target rectifier modules is less than or equal to the preset number, no energy-saving control is performed on the current power supply system, and the target rectifier modules at the preset number are kept running.

[0135] Among them, the high-efficiency operating range can be characterized by any one of the upper and lower limits of the high-efficiency operating interval, the optimal operating point, and the load fluctuation ratio. Taking the upper and lower limits of the high-efficiency operating interval as an example, the lower threshold of the high-efficiency operating range is the lower limit value among the upper and lower limits of the high-efficiency operating interval.

[0136] If the high-efficiency operating range is characterized by the upper and lower limits of the high-efficiency operating interval, the goal of energy-saving control achieved through the rectifier module sleep energy-saving technology based on steps S208 to S2010 is to maintain the load rate of the rectifier modules in operation within the high-efficiency operating interval; if the high-efficiency operating range is characterized by the optimal operating point, the goal of energy-saving control is to maintain the load rate at the optimal operating point; if the high-efficiency operating range is characterized by the load fluctuation ratio, the goal of energy-saving control is to maintain the load rate within an interval obtained by subtracting the load fluctuation ratio from the optimal operating point. In algorithm implementation, the control operation for the upper limit of the high-efficiency operating interval is equivalent to that for the optimal operating point, and the control operation for the lower limit of the high-efficiency operating interval is equivalent to that obtained by subtracting the load fluctuation ratio from the optimal operating point.

[0137] S209: According to the efficiency identifier, preferentially turn off one or more of the rectifier modules with the lowest efficiency among the target rectifier modules.

[0138] Preferentially turn off one or more of the rectifier modules with the lowest efficiency among the target rectifier modules according to the efficiency identifier. The efficiency identifier is used to identify the energy conversion efficiency of the target rectifier module. That is, in one turn-off operation, one or more low-efficiency rectifier modules can be preferentially turned off.

[0139] After performing a shutdown operation, for another target rectification module, step S207 is executed until the number of target rectification modules in operation reaches a preset number, that is, until step S2010 ends the energy-saving control method provided by the embodiment of the present application.

[0140] S2010: Determine that the number of target rectification modules in operation reaches a preset number.

[0141] So far, through steps S208 to S2010, the number of target rectification modules is controlled according to the load rate of each target rectification module and its high-efficiency working range, so as to achieve energy-saving control by using the rectification module sleep energy-saving technology.

[0142] In addition, if the high-efficiency working range is characterized by the upper and lower limits of the high-efficiency working interval, the goal of energy-saving control achieved through the rectification module sleep energy-saving technology based on steps S208 to S2010 is that the load rate of the rectification modules in operation is maintained within the high-efficiency interval; if the high-efficiency working range is characterized by the optimal working point, the goal of energy-saving control is that the load rate is maintained at the optimal working point; if the high-efficiency working range is characterized by the load fluctuation ratio, the goal of energy-saving control is that the load rate is maintained within an interval of the optimal working point minus the load fluctuation ratio. In algorithm implementation, the control operation for the upper limit of the high-efficiency working interval is equivalent to the operation for the optimal working point, and the control operation for the lower limit of the high-efficiency working interval is equivalent to the optimal working point minus the load fluctuation ratio.

[0143] In a possible design, after each time one or more of the target rectification modules with the lowest efficiency are shut down, the energy-saving control method provided by the embodiment of the present application may further include:

[0144] Determine the AC power limit value of each candidate rectification module according to the total AC power limit value according to a preset distribution strategy, where the candidate rectification module refers to the target rectification modules remaining after each shutdown operation. And issue a fourth start command and a second power limit command to each candidate rectification module, so that each candidate rectification module operates in response to the fourth start command and the second power limit command not exceeding its respective AC power limit value. In actual working conditions, the preset distribution strategy may also be other proportional distributions, not only the average distribution, and the embodiment of the present application does not limit this.

[0145] As can be seen from the description of the above embodiments, for the energy-saving control method provided by the embodiments of the present application, after determining the target rectifier modules according to the total AC power limit value and the high-efficiency operating ranges of the rectifier modules in the power supply system, an opening command and a first power limit command are sent to the target rectifier modules based on the virtual power plant dispatching response to turn on each target rectifier module. Furthermore, the number of target rectifier modules is adjusted by combining the rectifier module sleep energy-saving technology to adjust the load rate of the target rectifier modules so that the target rectifier modules in operation operate within the high-efficiency operating range, effectively exerting the energy-saving function of the target rectifier modules and improving the energy utilization efficiency of the site. And the rectifier module sleep energy-saving technology is applied in the virtual power plant scenario, expanding the application range of the rectifier module sleep energy-saving technology.

[0146] In some embodiments, as Figure 1 described in, the power supply system may further include that when all rectifier modules are turned on, some of all the rectifier modules can charge the battery; when a preset number of rectifier modules are turned on, the battery discharges to share the load. During the energy-saving control process, when the load rate of the target rectifier module approaches the load rate corresponding to its AC power limit value, the current target rectifier module operates in a power-limited state, and the remaining load is borne by the battery. The degree of proximity between the load rate of the target rectifier module and the load rate corresponding to its AC power limit value can be characterized by a preset difference value. The embodiments of the present application do not limit the specific value of the preset difference value.

[0147] Figure 4 The following is a schematic structural diagram of an energy-saving control device provided by the embodiments of the present application. The energy-saving control device can be applied to a virtual power plant, and the power supply system includes each rectifier module. As Figure 4 shown, the energy-saving control device 400 provided by the embodiments of the present application includes:

[0148] An acquisition and processing module 401, configured to acquire the total AC power limit value provided for each rectifier module, and determine the number of target rectifier modules and the AC power limit value of each target rectifier module according to the total AC power limit value and the high-efficiency operating ranges of the rectifier modules;

[0149] A sending module 402, configured to send a first opening command and a first power limit command to the target rectifier modules, so that the target rectifier modules respond to the first opening command and the first power limit command to operate without exceeding their respective AC power limit values;

[0150] A control module 403, configured to acquire the load rate of each target rectifier module during the operation of the target rectifier modules, and adjust the number of target rectifier modules according to the load rate of each target rectifier module and its high-efficiency operating range.

[0151] In a possible design, Figure 5The figure is a schematic structural diagram of an acquisition and processing module provided by an embodiment of the present application. As Figure 5 shown, the acquisition and processing module 401 provided by the embodiment of the present application includes:

[0152] A sequence generation module 4011, configured to determine the AC power range consumed by different numbers of rectifier modules according to the high-efficiency operating range of each rectifier module in the power supply system, and sort the AC power ranges to obtain an AC power range sequence;

[0153] A number determination module 4012, configured to scan the AC power range sequence, obtain the target AC power range that matches the total AC power limit value, and determine the number of rectifier modules corresponding to the target AC power range as the number of target rectifier modules;

[0154] A power determination module 4013, configured to determine the AC power limit value of each target rectifier module according to the total AC power limit value according to a preset distribution strategy.

[0155] In a possible design, the sequence generation module 4011 is further configured to:

[0156] Sort the AC power ranges in descending order of the number of rectifier modules to obtain an AC power range sequence;

[0157] Wherein, the first data in the AC power range sequence refers to the AC power range consumed by all rectifier modules corresponding to the high-efficiency operating range of all rectifier modules when all rectifier modules in the power supply system are turned on;

[0158] The last data in the AC power range sequence refers to the AC power range consumed by one rectifier module corresponding to the high-efficiency operating range of one rectifier module when only one rectifier module in the power supply system is turned on.

[0159] In a possible design, the number determination module 4012 is further configured to:

[0160] In the AC power range sequence, obtain the first AC power range that includes the total AC power limit value, and determine the obtained AC power range as the target AC power range.

[0161] In a possible design, the distribution module 402 is further configured to:

[0162] If it is determined that the total AC power limit value is greater than the upper limit of the first data in the AC power range sequence, send a second turn-on command to all rectifier modules in the power supply system to turn on all rectifier modules;

[0163] If it is determined that the total AC power limit is less than the lower limit of the last data in the AC power range sequence, send a third activation command to a preset number of rectifier modules in the power supply system to activate the preset number of rectifier modules, where the preset number is the lower limit number of rectifier modules in the power supply system.

[0164] In a possible design, the control module 403 is specifically configured to:

[0165] If it is determined that the number of target rectifier modules is greater than the preset number, determine whether the current load rate of the target rectifier modules is less than the lower limit threshold of the high-efficiency operating range of the current target rectifier modules;

[0166] If so, preferentially turn off one or more of the lowest-efficiency rectifier modules in the target rectifier modules according to the efficiency identifier, where the efficiency identifier is used to identify the energy conversion efficiency of the target rectifier modules;

[0167] Repeat the above determination steps until the number of target rectifier modules in operation reaches the preset number.

[0168] In a possible design, the high-efficiency operating range is characterized by any one of the upper and lower limits of the high-efficiency operating interval, the optimal operating point, and the load fluctuation ratio.

[0169] In a possible design, the power supply system further includes a battery, and the battery is connected in parallel to the DC busbar;

[0170] When all rectifier modules are activated, some of the rectifier modules in all rectifier modules charge the battery;

[0171] When a preset number of rectifier modules are activated, the battery discharges to share the load.

[0172] In a possible design, the power determination module 4013 is further configured to determine the AC power limit of each candidate rectifier module according to the total AC power limit according to a preset distribution strategy, where the candidate rectifier modules refer to the remaining target rectifier modules after each shutdown operation;

[0173] The sending module 402 is further configured to send a fourth activation command and a second power limit command to each candidate rectifier module, so that each candidate rectifier module operates in response to the fourth activation command and the second power limit command not exceeding its respective AC power limit.

[0174] The energy-saving control device provided in the embodiments of the present application can execute the steps of the energy-saving control method in the above method embodiments, and its implementation principle and technical effects are similar, and will not be described in detail here.

[0175] Figure 6 It is a schematic structural diagram of an electronic device provided in the embodiments of the present application. As Figure 6As shown in the figure, the electronic device 500 provided by the embodiment of the present application may include: a processor 501, and a memory 502 communicatively connected to the processor 501.

[0176] The memory 502 is used to store a program. Specifically, the program may include program code, and the program code includes computer execution instructions.

[0177] The memory 502 may include a high-speed RAM memory, and may also include a non-volatile memory (NoN-volatile memory), such as at least one disk memory.

[0178] The processor 501 is used to execute the computer execution instructions stored in the memory 502 to implement an energy-saving control method.

[0179] Among them, the processor 501 may be a central processing unit (CPU for short), or an application specific integrated circuit (ASIC for short), or one or more integrated circuits configured to implement the embodiment of the present application.

[0180] Optionally, the memory 502 may be either independent or integrated with the processor 501. When the memory 502 is a device independent of the processor 501, the electronic device 500 may further include:

[0181] A bus 503 for connecting the processor 501 and the memory 502. The bus may be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0182] Optionally, in a specific implementation, if the memory 502 and the processor 501 are integrated on a chip, the memory 502 and the processor 501 may communicate through an internal interface.

[0183] The present application also provides a computer-readable storage medium, which may include: various media capable of storing program codes such as USB flash drives, external hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs. Specifically, the computer-readable storage medium stores computer-executable instructions for each step of the method in the above embodiments.

[0184] The present application also provides a computer program product, including computer-executable instructions, which implement the method in the above embodiments when executed by a processor.

[0185] The present application also provides a virtual power plant power supply system, including: a dispatching platform and each rectification module; the dispatching platform includes the electronic device provided above and is configured to implement the method in the above embodiments.

[0186] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include known common knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the claims.

[0187] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. An energy-saving control method, characterized in that: Applied to a virtual power plant power supply system, the power supply system includes various rectifier modules; the method includes: Obtaining a total AC power limit provided for each rectifier module, and determining the number of target rectifier modules and the AC power limit of each target rectifier module according to the total AC power limit and the high-efficiency working range of each rectifier module; Sending a first start command and a first power limit command to the target rectifier module, so that the target rectifier module responds to the first start command and the first power limit command to operate without exceeding the respective AC power limits; During the operation of the target rectifier modules, the load rate of each target rectifier module is obtained, and the number of the target rectifier modules is adjusted according to the load rate of each target rectifier module and its high-efficiency working range.

2. The energy-saving control method according to claim 1, characterized in that: The determining the number of target rectifier modules and the AC power limit of each target rectifier module according to the total AC power limit and the high-efficiency working range of each rectifier module includes: According to the high-efficiency working range of each rectifier module in the power supply system, determining the AC power range required to be consumed by different numbers of rectifier modules, and sorting the AC power ranges to obtain an AC power range sequence; Scan the AC power range sequence to obtain a target AC power range that matches the total AC power limit, and determine the number of rectifier modules corresponding to the target AC power range as the number of target rectifier modules; The AC power limit of each target rectifier module is determined according to the total AC power limit and a preset allocation strategy.

3. The energy-saving control method according to claim 2, characterized in that: The AC power ranges are sorted to obtain an AC power range sequence, including: Sorting the AC power ranges in descending order according to the number of the rectifier modules to obtain the AC power range sequence; The first data in the AC power range sequence refers to the AC power range that all the rectifier modules need to consume corresponding to the high-efficiency working range of all the rectifier modules when all the rectifier modules in the power supply system are turned on; The last data in the AC power range sequence refers to the AC power range that the one rectifier module needs to consume corresponding to the high-efficiency working range of the one rectifier module when only one rectifier module in the power supply system is turned on.

4. The energy-saving control method according to claim 2, characterized in that: The acquiring a target AC power range matching the AC power total limit value includes: In the AC power range sequence, a first AC power range including the AC power total limit value is obtained, and the obtained AC power range is determined as the target AC power range.

5. The energy-saving control method according to claim 3, characterized in that: Before sending the first start command and the first power limit command to the target rectifier module, the method further includes: If it is determined that the total AC power limit is greater than the upper limit of the first data in the AC power range sequence, a second start command is issued to all the rectifier modules in the power supply system to start all the rectifier modules; If it is determined that the total AC power limit is less than the lower limit of the last data in the AC power range sequence, a third start command is sent to a preset number of rectifier modules in the power supply system to turn on the preset number of rectifier modules, where the preset number is the lower limit number of rectifier modules.

6. The energy-saving control method according to claim 5, characterized in that: The step of adjusting the number of the target rectifier modules according to the load rate of each target rectifier module and its high-efficiency working range includes: If it is determined that the number of the target rectifier modules is greater than the preset number, determining whether the load rate of the current target rectifier module is less than a lower limit threshold of the high-efficiency working range of the current target rectifier module; If so, one or more rectifier modules with the lowest efficiency among the target rectifier modules are preferentially shut down according to the efficiency identifier, where the efficiency identifier is used to identify the energy conversion efficiency of the target rectifier module; The above determination steps are repeated until the number of the target rectifier modules in operation reaches the preset number.

7. The energy-saving control method according to claim 6, characterized in that: After shutting down one or more rectifier modules with the lowest efficiency among the target rectifier modules each time, the method further comprises: Determining an AC power limit value of each candidate rectifier module according to the total AC power limit value and the preset allocation strategy, wherein the candidate rectifier module refers to the target rectifier module remaining after each shutdown operation; A fourth start-up command and a second power limit command are issued to each candidate rectifier module, so that each candidate rectifier module responds to the fourth start-up command and the second power limit command to operate at a level not exceeding the respective AC power limit.

8. The energy-saving control method according to any one of claims 2 to 7, characterized in that: The high-efficiency working range is characterized by any one of the upper and lower limits of the high-efficiency working range, the optimal working point, and the load fluctuation ratio.

9. The energy-saving control method according to claim 5, characterized in that: The power supply system also includes a battery, which is connected in parallel to the DC busbar; When all the rectifier modules are turned on, some of the rectifier modules among all the rectifier modules charge the battery; When the preset number of rectifier modules are turned on, the battery is discharged to share the load.

10. An energy-saving control device, characterized in that: Applied to a virtual power plant power supply system, the power supply system includes various rectifier modules; the device includes: An acquisition and processing module, used to acquire a total AC power limit provided for each rectifier module, and determine the number of target rectifier modules and the AC power limit of each target rectifier module according to the total AC power limit and the high-efficiency working range of each rectifier module; A sending module, configured to send a first start-up command and a first power limit command to the target rectifier module, so that the target rectifier module responds to the first start-up command and the first power limit command to operate without exceeding the respective AC power limits; The control module is used to obtain the load rate of each target rectifier module during the operation of the target rectifier module, and adjust the number of the target rectifier modules according to the load rate of each target rectifier module and its high-efficiency working range.

11. The energy-saving control device according to claim 10, characterized in that: The acquisition and processing module includes: A sequence generation module, used to determine the AC power range required to be consumed by different numbers of rectifier modules according to the high-efficiency working range of each rectifier module in the power supply system, and to sort the AC power ranges to obtain an AC power range sequence; A number determination module, configured to scan the AC power range sequence, obtain a target AC power range that matches the total AC power limit, and determine the number of rectifier modules corresponding to the target AC power range as the target number of rectifier modules; The power determination module is used to determine the AC power limit of each target rectifier module according to the total AC power limit and a preset allocation strategy.

12. The energy-saving control device according to claim 11, characterized in that: The sequence generation module is further used for: Sorting the AC power ranges in descending order according to the number of the rectifier modules to obtain the AC power range sequence; The first data in the AC power range sequence refers to the AC power range that all the rectifier modules need to consume corresponding to the high-efficiency working range of all the rectifier modules when all the rectifier modules in the power supply system are turned on; The last data in the AC power range sequence refers to the AC power range that the one rectifier module needs to consume corresponding to the high-efficiency working range of the one rectifier module when only one rectifier module in the power supply system is turned on.

13. The energy-saving control device according to claim 11, characterized in that: The number determination module is further used for: In the AC power range sequence, a first AC power range including the AC power total limit value is obtained, and the obtained AC power range is determined as the target AC power range.

14. The energy-saving control device according to claim 12, characterized in that: The sending module is further used for: If it is determined that the total AC power limit is greater than the upper limit of the first data in the AC power range sequence, a second start command is issued to all the rectifier modules in the power supply system to start all the rectifier modules; If it is determined that the total AC power limit is less than the lower limit of the last data in the AC power range sequence, a third start command is sent to a preset number of rectifier modules in the power supply system to turn on the preset number of rectifier modules, where the preset number is the lower limit number of rectifier modules.

15. The energy-saving control device according to claim 14, characterized in that: The control module is specifically used for: If it is determined that the number of the target rectifier modules is greater than the preset number, determining whether the load rate of the current target rectifier module is less than a lower limit threshold of the high-efficiency working range of the current target rectifier module; If so, one or more rectifier modules with the lowest efficiency among the target rectifier modules are preferentially shut down according to the efficiency identifier, where the efficiency identifier is used to identify the energy conversion efficiency of the target rectifier module; The above determination steps are repeated until the number of the target rectifier modules in operation reaches the preset number.

16. The energy-saving control device according to claim 15, characterized in that: The power determination module is further used to determine the AC power limit of each candidate rectifier module according to the total AC power limit and the preset allocation strategy, wherein the candidate rectifier module refers to the target rectifier module remaining after each shutdown operation; The sending module is further used to send a fourth start-up command and a second power limit command to each of the candidate rectifier modules, so that each of the candidate rectifier modules responds to the fourth start-up command and the second power limit command to operate without exceeding the respective AC power limit.

17. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the energy-saving control method according to any one of claims 1 to 9.

18. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, they are used to implement the energy-saving control method according to any one of claims 1 to 9.

19. A computer program product, comprising computer executable instructions, which are used to implement the energy-saving control method according to any one of claims 1 to 9 when executed by a processor.

20. A virtual power plant power supply system, characterized in that: include: A scheduling platform and each rectifier module; the scheduling platform is used to implement the energy-saving control method as described in any one of claims 1 to 9.

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