A power control method applied to charge and discharge control system

Abstract

The present application discloses a power control method for a charge-discharge control system, comprising: calculating, through M second control modules, a first total output power outputted to a load by Y operating DC / DC modules among T DC / DC modules at the current moment or within a preset time period starting at the current moment; collecting, through L first control modules, a second total output power of S operating AC / DC modules among N AC / DC modules at the current moment; and comparing, through the L first control modules, the first total output power with the second total output power. If the first total output power is less than the second total output power, shutting down A operating AC / DC modules among the S operating AC / DC modules, where A is less than S, S is less than N, and Y is less than or equal to T. By controlling the AC / DC modules in the charge-discharge control system, the present application can dynamically adjust the output power of an AC cabinet to achieve energy-saving effects.

Description

Technical Field

[0001] The present application relates to the technical field of battery charging and discharging, and in particular to a power control method applied to a charging and discharging control system. Background Art

[0002] In battery formation, capacity grading, and battery charge-discharge detection systems, for energy conservation and ease of wiring, multiple bidirectional inverters are typically connected in parallel on a busbar to form an AC cabinet. These bidirectional inverters are 380Vac to 750Vdc power modules, with power ranging from tens to 100-200 kilowatts. The downstream equipment is a 750Vdc to 5V DC power module, with power ranging from 1 to 2 kilowatts. The DC module's primary function is to charge and discharge the connected battery cells. Multiple DC modules are installed together to form a DC cabinet. Due to the high power output of AC cabinets, they can often support dozens or even hundreds of them.

[0003] In case 1, if all DC cabinets are charged at full power, the power required by the AC cabinet to be provided by the DC cabinet reaches the maximum value Pac_max.

[0004] In case 2, if n / 2 batteries are charged at full power and n / 2 batteries are discharged at full power, the power required by the DC cabinet from the AC cabinet reaches the minimum value Pac_min.

[0005] In actual operation, the power required by the AC cabinet is somewhere between these two values, denoted as Pac_t. Because there are many DC cabinets and the charging and discharging steps of each DC module are not fixed, Pac_t is a variable that changes in real time. This can lead to the following problems: If the AC cabinet is fully configured, there will be excessive power redundancy, low cabinet efficiency, and high losses. Furthermore, the large number of AC modules increases costs. Summary of the Invention

[0006] To solve the above technical problems, the present application provides a power control method applied to a charge and discharge control system. By shutting down N AC / DC modules in the charge and discharge control system, the output power of the AC cabinet can be dynamically adjusted to achieve energy saving. In addition, through the working step switching mode / charge and discharge channel process switching, the T DC / DC modules in the charge and discharge control system can be shut down, or additional AC / DC modules can be started to increase the output power of the AC cabinet to prevent overpower protection of the AC cabinet.

[0007] In a first aspect, the present application provides a power control method applied to a charge and discharge control system, wherein the charge and discharge control system includes:

[0008] N AC / DC modules, T DC / DC modules, L first control modules for controlling the startup or shutdown of the N AC / DC modules, and M second control modules for respectively controlling the startup or shutdown of each of the T DC / DC modules, where L is less than or equal to N; wherein,

[0009] The N AC / DC modules are distributed in L AC cabinets; the T DC / DC modules are distributed in M different DC cabinets, the DC cabinets correspond one-to-one to the second control modules; and the AC cabinets correspond one-to-one to the first control modules.

[0010] The power control method comprises:

[0011] Calculating, by the M second control modules, a first total output power output to the load by the Y operating DC / DC modules among the T DC / DC modules at a current moment or within a preset time starting from the current moment;

[0012] collecting, through the L first control modules, the second total output power of S operating AC / DC modules among the N AC / DC modules at a current moment;

[0013] comparing the first total output power with the second total output power through the L first control modules,

[0014] If the first total output power is less than the second total output power, shutting down A AC / DC modules among the S running AC / DC modules; wherein A is less than S;

[0015] If the first total output power is greater than the second total output power, then (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules that are in operation, where B is less than N, S is less than or equal to N, and Y is less than or equal to T.

[0016] In an optional implementation, the L first control modules compare the first total output power with the second total output power. If the first total output power is less than the second total output power, A of the S running AC / DC modules are shut down, specifically including:

[0017] The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is less than zero, the L first control modules divide the absolute value of the first difference power by the output power of a single AC / DC module to obtain a quotient A, and then shut down A of the S running AC / DC modules. Then, the L first control modules re-collect the power of the running AC / DC modules at the current moment to obtain a third total output power of all running AC / DC modules.

[0018] In an optional implementation, the first total output power is compared with the second total output power by the L first control modules. If the first total output power is greater than the second total output power, (B+1) additional AC / DC modules are started on the basis of the S AC / DC modules that are in operation, specifically including:

[0019] The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is greater than zero, the L first control modules divide the first difference power by the output power of a single AC / DC module to obtain a quotient of B. Based on the S operating AC / DC modules, (B+1) additional AC / DC modules are started to obtain a third total output power of all operating AC / DC modules; where B is greater than or equal to 0, and where the sum of S and (B+1) is less than or equal to N.

[0020] In an optional implementation, if the first total output power is less than the second total output power, A AC / DC modules among the S operating AC / DC modules are shut down; or if the first total output power is greater than the second total output power, after additionally starting (B+1) AC / DC modules in addition to the S operating AC / DC modules, the power control method further includes:

[0021] When the first DC / DC module performs a working step switch at a current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the first total output power is updated by the M second control modules to obtain a fourth total output power of all operating DC / DC modules; wherein the first DC / DC module is one of the Y DC / DC modules;

[0022] The third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

[0023] In an optional implementation, if the first total output power is less than the second total output power, A AC / DC modules among the S operating AC / DC modules are shut down; or if the first total output power is greater than the second total output power, after additionally starting (B+1) AC / DC modules in addition to the S operating AC / DC modules, the power control method further includes:

[0024] When the first DC / DC module completes the charge and discharge channel process at the current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the M second control modules update the first total output power to obtain a fourth total output power of all running DC / DC modules; wherein the first DC / DC module is one of the Y DC / DC modules;

[0025] The third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

[0026] In an optional embodiment, comparing the third total output power with the fourth total output power by the L first control modules, and shutting down some of the N AC / DC modules according to the comparison result, specifically includes:

[0027] The third total output power is compared with the fourth total output power by the L first control modules. If the fourth total output power is less than the third total output power, the third total output power is subtracted from the fourth total output power to obtain a second difference power. The absolute value of the second difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient C. C AC / DC modules are then determined from the running AC / DC modules to be shut down, where C is greater than or equal to 0.

[0028] In an optional implementation manner, after the L first control modules compare the first total output power with the second total output power, the method further includes:

[0029] If the first total output power is less than the second total output power, and S=N,

[0030] subtracting the second total output power from the first total output power by the L first control modules to obtain a first difference power; if the first difference power is less than zero, dividing the absolute value of the first difference power by the output power of a single DC / DC module by the L first control modules to obtain a quotient D;

[0031] Based on the control of running Y DC / DC modules, the M second control modules further control the start of E DC / DC modules, where E is less than or equal to D, and the sum of E and Y is less than or equal to T.

[0032] In an optional implementation manner, after the L first control modules compare the first total output power with the second total output power, the method further includes:

[0033] If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be shut down according to the historical operating time of the DC / DC modules by the M second control modules; or

[0034] If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be turned off according to the sequence numbers of the DC / DC modules by the M second control modules; or

[0035] The M second control modules are used to simultaneously control one or more DC / DC modules among the T DC / DC modules to be shut down according to the sequence number of the DC / DC module and the historical operating time of the DC / DC module, where C is a positive integer and C is less than T.

[0036] In an optional implementation manner, after the L first control modules compare the first total output power with the second total output power, the method further includes:

[0037] If the first total output power is greater than the second total output power and S=N, no additional AC / DC module is started.

[0038] The present application discloses a power control method for a charge-discharge control system, wherein the charge-discharge control system includes: N AC / DC modules, T DC / DC modules, L first control modules for controlling the activation or deactivation of the N AC / DC modules, and M second control modules for controlling the activation or deactivation of each of the T DC / DC modules, where L is less than or equal to N. N AC / DC modules are distributed in L AC cabinets; T DC / DC modules are distributed in M different DC cabinets, and the DC cabinets correspond to the second control modules one-to-one; and the AC cabinets correspond to the first control modules one-to-one. The power control method may include but is not limited to: calculating, by the M second control modules, a first total output power output to the load by Y running DC / DC modules among the T DC / DC modules at the current moment or within a preset time starting from the current moment; collecting, by the L first control modules, a second total output power at the current moment of S running AC / DC modules among the N AC / DC modules; comparing the first total output power with the second total output power by the L first control modules; and if the first total output power is less than the second total output power, shutting down A running AC / DC modules among the S running AC / DC modules; wherein A is less than S;

[0039] If the first total output power is greater than the second total output power, (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules that are in operation, where B is less than N, S is less than or equal to N, and Y is less than or equal to T.

[0040] By adopting this application, the output power of the AC cabinet can be dynamically adjusted by starting or shutting down the N AC / DC modules in the charge and discharge control system to achieve energy saving. In addition, by switching the working step mode / charging and discharging channel process, the T DC / DC modules in the charge and discharge control system can be shut down, or additional AC / DC modules can be started to increase the output power of the AC cabinet to prevent overpower protection of the AC cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] Figure 1 This is a flow chart of a power control method applied to a charge and discharge control system provided by the present application;

[0043] Figure 2This is a structural diagram of a charge and discharge control system provided by this application. DETAILED DESCRIPTION

[0044] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] It should be noted that the first and second in this application are only used to distinguish different power and control modules, etc., and have no other special meanings and should not limit the scope of protection of this application.

[0046] Example 1

[0047] The charge and discharge control system in this application may include but is not limited to:

[0048] N AC / DC modules (AC-DC conversion modules), T DC / DC modules (DC-DC conversion modules), L first control modules for controlling the activation or deactivation of the N AC / DC modules, and M second control modules for respectively controlling the activation or deactivation of each of the T DC / DC modules, where L is less than or equal to N; wherein,

[0049] An AC / DC module is a conversion module that converts alternating current into direct current, and a DC / DC module is a conversion module that converts one type of direct current into another type of direct current.

[0050] The N AC / DC modules are distributed in L AC cabinets (wherein the AC cabinets may be AC distribution cabinets); the T DC / DC modules are distributed in M different DC cabinets (wherein the DC cabinets may be DC distribution cabinets), and the DC cabinets correspond one-to-one with the second control modules (i.e., the number of DC cabinets corresponds one-to-one with the number of second control modules, with one DC cabinet corresponding to one second control module); and the AC cabinets correspond one-to-one with the first control modules (i.e., the number of AC cabinets corresponds one-to-one with the number of first control modules, with one AC cabinet corresponding to one first control module).

[0051] Optionally, N is a positive integer, T is a positive integer, M is a positive integer, and L is a positive integer;

[0052] It should be noted that the input sides of the N AC / DC modules are also connected to a 380V AC power supply.

[0053] It should be noted that a high-voltage bus (e.g., a 750V high-voltage DC bus) is also connected between the output sides of the N AC / DC modules and the input sides of the T DC / DC modules. That is, the output sides of the N AC / DC modules are connected to the input sides of the T DC / DC modules via the high-voltage bus for power transmission.

[0054] Optionally, the first control module may include but is not limited to: any one of chips such as a DPU (Data Processing Unit), a DSP (Digital Signal Processing) chip, or other control chips for controlling functions related to the AC / DC module;

[0055] It should be noted that a first control module can control one or more AC / DC modules;

[0056] Optionally, the second control module may include but is not limited to: any one of chips such as DPU, DSP or other control chips for controlling functions related to the DC / DC module;

[0057] It should be noted that one second control module can control one or more DC / DC modules.

[0058] Figure 1 The following is a flow chart showing a power control method applied to a charge and discharge control system. Figure 1 As shown,

[0059] The aforementioned power control method may include but is not limited to the following steps:

[0060] S101 , calculating, by M second control modules, a first total output power outputted to a load by Y operating DC / DC modules among T DC / DC modules at a current moment or within a preset time starting from the current moment.

[0061] Specifically, the first total output power is the total output power outputted to the load by Y operating DC / DC modules among the T DC / DC modules at the current moment, or the first total output power is the total output power outputted to the load by Y operating DC / DC modules among the T DC / DC modules within a preset time period starting at the current moment. The load may include, but is not limited to, any of a battery pack, a battery, and a device incorporating a battery. Optionally, a load may be one or more batteries.

[0062] S102 : The second total output power of S operating AC / DC modules at the current moment is collected through L first control modules.

[0063] Specifically, the second total output power is the total output power output by the S running AC / DC modules to the T DC / DC modules at the current moment; or,

[0064] The second total output power is the total output power outputted to the high-voltage bus by the S running AC / DC modules at the current moment. The total output power is then outputted to the T DC / DC modules via the high-voltage bus.

[0065] S103. Compare the first total output power with the second total output power through L first control modules. If the first total output power is less than the second total output power, shut down A AC / DC modules among the S running AC / DC modules. If the first total output power is greater than the second total output power, start (B+1) additional AC / DC modules in addition to the S running AC / DC modules.

[0066] Specifically, A is less than S, B is less than N, S is less than N, and Y is less than or equal to T;

[0067] Optional, S is a positive integer, A is a natural number, B is a natural number, and Y is a natural number.

[0068] When S is less than N,

[0069] In the present application, the first total output power is compared with the second total output power by L first control modules. If the first total output power is less than the second total output power, A AC / DC modules among the S AC / DC modules that are in operation are shut down. Specifically, the following methods may be included:

[0070] The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is less than zero, the L first control modules divide the absolute value of the first difference power by the output power of a single AC / DC module to obtain a quotient A. A of the S operating AC / DC modules are then shut down (this reduces the output power of the AC cabinet while still meeting the power requirements of the DC cabinet, thereby achieving energy conservation). Subsequently, the L first control modules re-collect the power of the operating AC / DC modules at the current moment to obtain a third total output power of all operating AC / DC modules. Specifically, the third total output power is used as the total output power of the AC / DC modules remaining in operation after shutting down A of the S operating AC / DC modules.

[0071] In this application, the first total output power is compared with the second total output power by L first control modules. If the first total output power is greater than the second total output power, (B+1) AC / DC modules are started on the basis of the S AC / DC modules that are in operation. Specifically, the starting of the modules may include but is not limited to:

[0072] The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is greater than zero, the L first control modules divide the first difference power by the output power of a single AC / DC module to obtain a quotient B. Based on the S operating AC / DC modules, (B+1) additional AC / DC modules are activated, and finally a third total output power of all operating AC / DC modules is obtained (purpose: when the AC cabinet is not outputting at maximum power and the actual operating power of the DC cabinet is greater than the maximum power provided by the AC cabinet, (B+1) additional AC / DC modules are activated based on the S operating AC / DC modules to increase the output power of the AC cabinet, meet the required power of the DC cabinet, and prevent overpower protection of the AC cabinet). That is, the third total output power is used here as the total operating power of all operating AC / DC modules after (B+1) AC / DC modules are activated based on the S operating AC / DC modules.

[0073] Wherein, B is greater than or equal to 0, and wherein the sum of S and (B+1) is less than or equal to N.

[0074] Optionally, if the first total output power is less than the second total output power, A AC / DC modules among the S operating AC / DC modules are shut down; or if the first total output power is greater than the second total output power, (B+1) AC / DC modules are additionally started in addition to the S operating AC / DC modules. The power control method further includes but is not limited to the following two methods:

[0075] Method 1:

[0076] Step 1: When a first DC / DC module switches to a working step at a current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the first total output power is updated by M second control modules to obtain a fourth total output power of all operating DC / DC modules; wherein the first DC / DC module is one of the Y operating DC / DC modules;

[0077] Step 2: The third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

[0078] It should be noted that the fourth total output power here is: when the first DC / DC module performs step switching at the current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the total output power of the T DC / DC modules (or: when the output power of the first DC / DC module is set to 0, the total output power of the DC / DC modules operating in the T DC / DC modules).

[0079] It should be noted that, taking the load as a battery as an example, the process steps in this application may include but are not limited to any of the following: battery charging process, battery static process, battery discharging process, battery operating condition test process, and DCIR test process.

[0080] It should be noted that the work step switching may include but is not limited to: switching between the battery charging process and the battery static process, switching between the battery discharging process and the battery static process, switching between the battery static process and the battery working condition test process, or switching between the DCIR test process and the battery working condition test process.

[0081] Method 2:

[0082] Step 1: When the first DC / DC module completes the charge-discharge channel process at the current moment or at any moment within the preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the M second control modules update the first total output power to obtain the fourth total output power of all running DC / DC modules; it should be noted that the fourth total output power here is: when the first DC / DC module completes the charge-discharge channel process at the current moment or at any moment within the preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the total output power of the T DC / DC modules (or: when the output power of the first DC / DC module is set to 0, the total output power of the DC / DC modules running among the T DC / DC modules). The first DC / DC module may correspond to a single channel, and a single channel is used to charge and discharge a load;

[0083] Step 2: Compare the third total output power with the fourth total output power through the L first control modules, and shut down some of the N AC / DC modules according to the comparison result.

[0084] It should be noted that, taking a battery as an example, the charge and discharge channel process of a single battery in this application may include but is not limited to: a single-channel battery charging process, a single-channel battery discharging process, and a single-channel battery static process.

[0085] It should be noted that the third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are shut down according to the comparison result, which may specifically include but is not limited to the following steps:

[0086] The third total output power is compared with the fourth total output power through L first control modules. If the fourth total output power is less than the third total output power, the third total output power is subtracted from the fourth total output power to obtain a second difference power. The absolute value of the second difference power is divided by the output power of a single AC / DC module through the L first control modules to obtain a quotient C. C AC / DC modules are then determined from the running AC / DC modules to be shut down, where C is greater than or equal to 0.

[0087] Optional, when S=N,

[0088] After the L first control modules compare the first total output power with the second total output power, the following six methods are also included but not limited to:

[0089] Method 1:

[0090] If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be shut down according to the historical operating time of the DC / DC modules by the M second control modules; specifically,

[0091] If one of the T DC / DC modules is controlled to be shut down, the DC / DC module with the shortest running time in the historical running time is shut down first; or,

[0092] If multiple DC / DC modules among T DC / DC modules are controlled to be shut down, multiple DC / DC modules with relatively short operating time in historical operating time can be shut down first. It should be noted that method 1 is adopted to prevent overpower protection of the AC cabinet.

[0093] It should be noted that before the L first control modules compare the first total output power with the second total output power, the M second control modules may obtain the historical operating time of the T DC / DC modules in advance.

[0094] Method 2:

[0095] If the first total output power is greater than the second total output power and S=N, the M second control modules are used to control one or more of the T DC / DC modules to be turned off according to the sequence number of the DC / DC modules. Specifically,

[0096] If one of T DC / DC modules is controlled to be shut down, after the T DC / DC modules are numbered, the DC / DC module with the smallest module number can be shut down first; or

[0097] If multiple DC / DC modules among T DC / DC modules are controlled to be shut down, after the T DC / DC modules are numbered respectively, multiple DC / DC modules with relatively smaller module numbers among all module numbers can be shut down first. It should be noted that method 2 is adopted to prevent overpower protection of the AC cabinet.

[0098] It should be noted that before the L first control modules compare the first total output power with the second total output power, the M second control modules may obtain the module serial numbers of the T DC / DC modules in advance.

[0099] Method 3:

[0100] If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be shut down based on the sequence number of the DC / DC module and the historical operating time of the DC / DC module by the M second control modules. Specifically,

[0101] If one of the T DC / DC modules is controlled to be shut down, and when C DC / DC modules with the same historical operating time and the shortest historical operating time appear at the same time, the DC / DC module with the smallest sequence number among the C DC / DC modules is preferentially shut down by the M second control modules, where C is a positive integer and C is less than T; or

[0102] If multiple DC / DC modules among T DC / DC modules are controlled to be shut down, and when C DC / DC modules with the same historical operating time and the shortest historical operating time appear at the same time, multiple DC / DC modules with relatively smaller sequence numbers among the C DC / DC modules are preferentially shut down by the M second control modules, where C is a positive integer and C is less than T. It should be noted that method 3 is adopted to prevent overpower protection of the AC cabinet.

[0103] It should be noted that before the L first control modules compare the first total output power with the second total output power, the M second control modules may obtain the historical operating time and module serial numbers of the T DC / DC modules in advance.

[0104] Method 4:

[0105] If the first total output power is less than the second total output power, and S=N,

[0106] subtracting the second total output power from the first total output power by the L first control modules to obtain a first difference power; if the first difference power is less than zero, dividing the absolute value of the first difference power by the output power of a single DC / DC module by the L first control modules to obtain a quotient D;

[0107] After the M second control modules control the operation of Y DC / DC modules, they control the activation of E DC / DC modules, where E is less than or equal to D, and the sum of E and Y is less than or equal to T, where E is a natural number and D is a natural number. It should be noted that method 5 is employed to prevent overpower protection of the AC cabinet.

[0108] Method 5:

[0109] If the first total output power is less than the second total output power, and S=N,

[0110] Prioritize starting Z DC / DC modules with relatively small module numbers among all module numbers, where the output power of these Z DC / DC modules is equal to the second total output power. After these Z DC / DC modules complete the charge and discharge channel process / perform step switching, control the start-up of the remaining Z DC / DC modules in the startup (TZ) to start. The product of 2*Z is less than or equal to T, and Z can be a positive integer.

[0111] Method 6:

[0112] If the first total output power is greater than the second total output power and S=N, no additional AC / DC module is started.

[0113] Example 2

[0114] When L is 1 in the above embodiment, Figure 2 The schematic diagram of a charging and discharging control system is shown as an example. Figure 2As shown, the charge and discharge control system may include, but is not limited to: 1 AC cabinet, 1 first control module, N AC / DC modules, T DC / DC modules, M different DC cabinets (wherein the DC cabinets may be numbered 1#, 2#, ..., M#), M second control modules, a 380V AC power supply, a 750V bus circuit, and T batteries (battery cells). In the second embodiment, the first control module and the N AC / DC modules are all placed or integrated in the one AC cabinet. In the second embodiment, the second control module and the four DC / DC modules may be placed or integrated in one DC cabinet, and the relationship between M and T satisfies: the product of 4*M is T.

[0115] The charge and discharge control system further includes T single channels for charging and discharging T loads (batteries), wherein one DC / DC module corresponds to each single channel.

[0116] It should be noted that N AC / DC modules are distributed in one AC cabinet, T DC / DC modules are distributed in M different DC cabinets, one AC cabinet corresponds one-to-one with one first control module, and one DC cabinet corresponds one-to-one with one second control module. The first control module can be a DPU, DSP chip or other control chip used to control the relevant functions of the AC / DC module, and the second control module can also be a DPU, DSP or other control chip used to control the relevant functions of the DC / DC module.

[0117] Figure 1-2 It is only used to illustrate the embodiments of the present application and should not limit the scope of protection of the present application.

[0118] Those skilled in the art will appreciate that the devices and algorithm steps of each example described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0119] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and systems can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0120] In the several embodiments provided in this application, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the components and steps of each example are described. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0121] The embodiments of the systems and devices described above are merely illustrative. For example, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, systems or units, or may be an electrical, mechanical or other form of connection.

[0122] Based on this understanding, the technical solution of this application, or the portion that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes a number of instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of this application. The aforementioned storage medium includes: a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc., various media that can store program code.

[0123] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and such modifications or substitutions should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A power control method applied to a charge and discharge control system, characterized in that: The charge and discharge control system includes: N AC / DC modules, T DC / DC modules, L first control modules for controlling the startup or shutdown of the N AC / DC modules, and M second control modules for respectively controlling the startup or shutdown of each of the T DC / DC modules, where L is less than or equal to N; wherein, The N AC / DC modules are distributed in L AC cabinets; the T DC / DC modules are distributed in M different DC cabinets, the DC cabinets correspond one-to-one to the second control modules; and the AC cabinets correspond one-to-one to the first control modules. The power control method comprises: Calculating, by the M second control modules, a first total output power output to the load by the Y operating DC / DC modules among the T DC / DC modules at a current moment or within a preset time starting from the current moment; collecting, through the L first control modules, the second total output power of S operating AC / DC modules among the N AC / DC modules at a current moment; comparing the first total output power with the second total output power through the L first control modules, If the first total output power is less than the second total output power, shutting down A AC / DC modules among the S running AC / DC modules; wherein A is less than S; If the first total output power is greater than the second total output power, then (B+1) additional AC / DC modules are started on the basis of the S AC / DC modules that are in operation, where the sum of S and (B+1) is less than or equal to N, and Y is less than or equal to T.

2. The power control method for a charge and discharge control system according to claim 1, wherein: Comparing the first total output power with the second total output power by the L first control modules, and shutting down A AC / DC modules among the S running AC / DC modules if the first total output power is less than the second total output power, specifically includes: The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is less than zero, the L first control modules divide the absolute value of the first difference power by the output power of a single AC / DC module to obtain a quotient A, and then shut down A of the S running AC / DC modules. Then, the L first control modules re-collect the power of the running AC / DC modules at the current moment to obtain a third total output power of all running AC / DC modules.

3. The power control method for a charge and discharge control system according to claim 1, wherein: The first total output power is compared with the second total output power by the L first control modules. If the first total output power is greater than the second total output power, (B+1) additional AC / DC modules are started on the basis of the S AC / DC modules that are in operation, specifically including: The L first control modules subtract the second total output power from the first total output power to obtain a first difference power. If the first difference power is greater than zero, the L first control modules divide the first difference power by the output power of a single AC / DC module to obtain a quotient of B. Based on the S operating AC / DC modules, (B+1) additional AC / DC modules are started to obtain a third total output power of all operating AC / DC modules; where B is greater than or equal to 0, and where the sum of S and (B+1) is less than or equal to N.

4. The power control method for a charge and discharge control system according to claim 3, wherein: If the first total output power is less than the second total output power, shutting down A AC / DC modules among the S running AC / DC modules; or if the first total output power is greater than the second total output power, starting (B+1) additional AC / DC modules in addition to the S running AC / DC modules, the power control method further includes: When the first DC / DC module performs a working step switch at a current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the first total output power is updated by the M second control modules to obtain a fourth total output power of all operating DC / DC modules; wherein the first DC / DC module is one of the Y DC / DC modules; The third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

5. The power control method for a charge and discharge control system according to claim 3, wherein: If the first total output power is less than the second total output power, shutting down A AC / DC modules among the S running AC / DC modules; or if the first total output power is greater than the second total output power, starting (B+1) additional AC / DC modules in addition to the S running AC / DC modules, the power control method further includes: When the first DC / DC module completes the charge and discharge channel process at the current moment or at any moment within a preset time starting from the current moment, and when the output power of the first DC / DC module is set to 0, the M second control modules update the first total output power to obtain a fourth total output power of all running DC / DC modules; wherein the first DC / DC module is one of the Y DC / DC modules; The third total output power is compared with the fourth total output power by the L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

6. The power control method applied to a charge and discharge control system according to claim 4 or 5, characterized in that: The comparing the third total output power with the fourth total output power by the L first control modules and shutting down some of the N AC / DC modules according to the comparison result specifically includes: The third total output power is compared with the fourth total output power by the L first control modules. If the fourth total output power is less than the third total output power, the third total output power is subtracted from the fourth total output power to obtain a second difference power. The absolute value of the second difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient C. C AC / DC modules are then determined from the running AC / DC modules to be shut down, where C is greater than or equal to 0.

7. The power control method for a charge and discharge control system according to claim 1, wherein: After comparing the first total output power with the second total output power through the L first control modules, the method further includes: If the first total output power is less than the second total output power, and S=N, subtracting the second total output power from the first total output power by the L first control modules to obtain a first difference power; if the first difference power is less than zero, dividing the absolute value of the first difference power by the output power of a single DC / DC module by the L first control modules to obtain a quotient D; Based on the control of running Y DC / DC modules, the M second control modules further control the start of E DC / DC modules, where E is less than or equal to D, and the sum of E and Y is less than or equal to T.

8. The power control method for a charge and discharge control system according to claim 1, wherein: After comparing the first total output power with the second total output power through the L first control modules, the method further includes: If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be shut down according to the historical operating time of the DC / DC modules by the M second control modules; or If the first total output power is greater than the second total output power and S=N, one or more of the T DC / DC modules are controlled to be turned off according to the sequence numbers of the DC / DC modules by the M second control modules; or The M second control modules are used to simultaneously control one or more DC / DC modules among the T DC / DC modules to be shut down according to the sequence number of the DC / DC module and the historical operating time of the DC / DC module, where C is a positive integer and C is less than T.

9. The power control method for a charge and discharge control system according to claim 1, wherein: After comparing the first total output power with the second total output power through the L first control modules, the method further includes: If the first total output power is greater than the second total output power and S=N, no additional AC / DC module is started.

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