Power control method applied to charge and discharge control system

Abstract

The invention discloses a power control method applied to a charge and discharge control system. The power control method comprises the following steps: calculating first total output power output to a load by Y DC / DC modules in operation in T DC / DC modules at a current moment or within a preset time starting from the current moment through M second control modules; acquiring second total output power of S AC / DC modules which are running in the N AC / DC modules at the current moment through L first control modules; the first total output power is compared with the second total output power through the L first control modules, if the first total output power is smaller than the second total output power, A AC / DC modules in the S AC / DC modules in operation are closed, A is smaller than S, S is smaller than N, and Y is smaller than or equal to T. By controlling the AC / DC module in the charging and discharging control system, the output power of the AC cabinet can be dynamically adjusted, so that the energy-saving effect is achieved.

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 the battery formation, capacity division and battery charge and discharge detection system, for energy saving and convenient wiring, multiple bidirectional inverters are usually connected in parallel on a busbar to form an AC cabinet. The bidirectional inverter is a 380Vac to 750Vdc power module with a power ranging from tens of kilowatts to one or two hundred kilowatts. The downstream equipment is a 750Vdc to 5V DC power module with a power ranging from one kilowatt to two kilowatts. The main function of the DC module is to charge and discharge the battery cells connected to the downstream. Multiple DC modules are installed together to form a DC cabinet. Since the AC cabinet has a large power, it can usually carry dozens or hundreds of AC cabinets.

[0003] Case 1: If all DC cabinets are charged at full power, the power that the DC cabinet needs the AC cabinet to provide 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 that the DC cabinet needs to provide from the AC cabinet reaches the minimum value Pac_min.

[0005] The actual working situation requires the power provided by the AC cabinet to be between the two, which is recorded as Pac_t. Since there are many DC cabinets and the charging and discharging steps of each DC module are not fixed, Pac_t is a real-time variable. This will cause the following problems: If the AC cabinet is fully equipped with power, there will be too much power redundancy, low efficiency of the AC cabinet, and high loss. At the same time, the number of AC modules is large and the cost is high. Summary of the invention

[0006] In order 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 over-power 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 comprises: N AC / DC modules, T DC / DC modules, L first control modules for controlling the N AC / DC modules to start or shut down, and M second control modules for respectively controlling each of the T DC / DC modules to start or shut down, 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 to the second control modules one by one; the AC cabinets correspond to the first control modules one by one; The power control method comprises: Calculate, by means of the M second control modules, a first total output power output to the load by the Y DC / DC modules in operation 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 AC / DC modules in operation at the current moment among the N AC / DC modules; 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 AC / DC modules in operation; wherein A is less than S; If the first total output power is greater than the second total output power, then based on the S AC / DC modules that are in operation, (B+1) additional AC / DC modules are started, where B is less than N, S is less than or equal to N, and Y is less than or equal to T.

[0008] In an optional implementation manner, the first total output power is compared 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, A AC / DC modules among the S AC / DC modules in operation are turned off, specifically including: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is less than zero, the absolute value of the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient of the A, and then A AC / DC modules among the S AC / DC modules in operation are shut down. Then, the power of the AC / DC modules in operation at the current moment is re-collected by the L first control modules to obtain a third total output power of all AC / DC modules in operation.

[0009] In an optional implementation manner, 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, then (B+1) AC / DC modules are additionally started based on the S AC / DC modules that are in operation, specifically including: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is greater than zero, the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient of B. Then, based on the S AC / DC modules in operation, (B+1) additional AC / DC modules are started to obtain a third total output power of all the AC / DC modules in operation; 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.

[0010] In an optional implementation manner, if the first total output power is less than the second total output power, A of the S AC / DC modules in operation are turned off; or, if the first total output power is greater than the second total output power, after (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules in operation, the power control method further includes: 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 first total output power is updated by the M second control modules 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.

[0011] In an optional implementation manner, if the first total output power is less than the second total output power, A of the S AC / DC modules in operation are turned off; or, if the first total output power is greater than the second total output power, after (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules in operation, 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 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; 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.

[0012] In an optional implementation manner, 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 through 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 through the L first control modules to obtain a quotient of C, and then C AC / DC modules are determined from the running AC / DC modules to be shut down, wherein C is greater than or equal to 0.

[0013] 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: 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 through the L first control modules to obtain a first difference power, and 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 through 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 starting E DC / DC modules, wherein E is less than or equal to D, and the sum of E and Y is less than or equal to T.

[0014] 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: 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 historical operation 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 DC / DC modules among the T DC / DC modules are controlled to be turned off according to the sequence number of the DC / DC modules by the M second control modules; or, The M second control modules are used to control one or more DC / DC modules among T DC / DC modules to be shut down according to the sequence number of the DC / DC module and the historical operation time of the DC / DC module, where C is a positive integer and C is less than T.

[0015] 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: If the first total output power is greater than the second total output power and S=N, no additional AC / DC module is started.

[0016] The present application discloses a power control method applied to a charge and discharge control system, wherein the charge and discharge control system comprises: N AC / DC modules, T DC / DC modules, L first control modules for controlling the N AC / DC modules to start or shut down, and M second control modules for respectively controlling each of the T DC / DC modules to start or shut down, where L is less than or equal to N; wherein, 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 by one; the AC cabinets correspond to the first control modules one by one; wherein the power control method may include but is not limited to: calculating the first total output power output to the load by Y DC / DC modules in operation among the T DC / DC modules at the current moment or within a preset time starting from the current moment through M second control modules; collecting the second total output power of S AC / DC modules in operation among the N AC / DC modules at the current moment through L first control modules; comparing the first total output power with the second total output power through L first control modules, and if the first total output power is less than the second total output power, shutting down A AC / DC modules in operation among the S 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) AC / DC modules are additionally started based on 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.

[0017] By adopting the present 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 over-power protection of the AC cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 paying any creative work.

[0019] Figure 1 It is a flow chart of a power control method applied to a charge and discharge control system provided by the present application; Figure 2 It is a structural schematic diagram of a charging and discharging control system provided by this application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments 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 creative work are within the scope of protection of this application.

[0021] It should be noted that the first and second in the present application are only used to distinguish different power and control modules, etc., and have no other special meanings and should not limit the protection scope of the present application.

[0022] Embodiment 1

[0023] The charge and discharge control system in this application may include but is not limited to: N AC / DC modules (AC-DC conversion modules), T DC / DC modules (DC-DC conversion modules), L first control modules for controlling the N AC / DC modules to start or shut down, and M second control modules for controlling each of the T DC / DC modules to start or shut down, L is less than or equal to N; wherein, The AC / DC module is a conversion module that converts alternating current into direct current, and the DC / DC module is a conversion module that converts one type of direct current into another type of direct current.

[0024] The N AC / DC modules are distributed in L AC cabinets (wherein the AC cabinet may be an AC distribution cabinet); the T DC / DC modules are distributed in M ​​different DC cabinets (wherein the DC cabinet may be a DC distribution cabinet), and the DC cabinets correspond to the second control modules one-to-one (that is, the number of DC cabinets corresponds to the number of second control modules one-to-one, and one DC cabinet corresponds to one second control module); the AC cabinets correspond to the first control modules one-to-one (that is, the number of AC cabinets corresponds to the number of first control modules one-to-one, and one AC cabinet corresponds to one first control module); Optionally, N is a positive integer, T is a positive integer, M is a positive integer, and L is a positive integer; It should be noted that the input sides of the N AC / DC modules are also connected to a 380V AC power source.

[0025] 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 to say, the output sides of the N AC / DC modules are connected to the input sides of the T DC / DC modules through the above-mentioned high-voltage bus for power transmission.

[0026] Optionally, the first control module may include but is not limited to: any one of any 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; It should be noted that a first control module can control one or more AC / DC modules; 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; It should be noted that one second control module can control one or more DC / DC modules.

[0027] Figure 1 A schematic diagram of a power control method applied to a charge and discharge control system is shown as an example. Figure 1 As shown, The aforementioned power control method may include but is not limited to the following steps: S101. Calculate, by M second control modules, a first total output power outputted to a load by Y running DC / DC modules among T DC / DC modules at a current moment or within a preset time starting from the current moment.

[0028] Specifically, the first total output power is the total output power output to the load by Y DC / DC modules in operation among T DC / DC modules at the current moment, or the first total output power is the total output power output to the load by Y DC / DC modules in operation among T DC / DC modules within a preset time starting from the current moment. The load may include but is not limited to: any one of a battery pack, a battery, and a device with an integrated battery. Optionally, a load may be one or more batteries.

[0029] S102. Collecting, through L first control modules, second total output powers of S operating AC / DC modules among N AC / DC modules at a current moment.

[0030] Specifically, the second total output power is the total output power outputted by the S running AC / DC modules to the T DC / DC modules at the current moment; or, 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, and then the total output power is outputted to the T DC / DC modules through the high-voltage bus.

[0031] 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 AC / DC modules that are in operation. If the first total output power is greater than the second total output power, start (B+1) more AC / DC modules based on the S AC / DC modules that are in operation.

[0032] 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; Optional, S is a positive integer, A is a natural number, B is a natural number, and Y is a natural number.

[0033] When S is less than N, 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 in operation are turned off. Specifically, the following methods may be included: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is less than zero, the absolute value of the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient A, and then A of the S AC / DC modules in operation are turned off (function: on the premise of meeting the power requirement of the DC cabinet, the output power of the AC cabinet can be reduced to achieve energy saving). Then, the power of the AC / DC modules in operation at the current moment is re-collected by the L first control modules to obtain a third total output power of all the AC / DC modules in operation. That is, the third total output power is used here as the total output power of the AC / DC modules that are still in operation after A of the S AC / DC modules in operation are turned off.

[0034] In the present application, the first total output power is compared with the second total output power through L first control modules. If the first total output power is greater than the second total output power, then (B+1) AC / DC modules are started up based on the S AC / DC modules that are in operation, which may specifically include but are not limited to: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is greater than zero, the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient of B. Then, based on the S AC / DC modules that are in operation, (B+1) AC / DC modules are added and started, and finally a third total output power of all the AC / DC modules in operation is obtained (function: when the AC cabinet is not outputting at maximum power and the actual working power of the DC cabinet is greater than the maximum power provided by the AC cabinet, based on the S AC / DC modules that are in operation, (B+1) AC / DC modules are added and started to increase the output power of the AC cabinet, meet the required power of the DC cabinet, and prevent over-power protection of the AC cabinet); that is, the third total output power is taken here as the total operating power of all the AC / DC modules in operation after (B+1) AC / DC modules are started based on the S AC / DC modules that are in operation.

[0035] 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.

[0036] Optionally, if the first total output power is less than the second total output power, A AC / DC modules among the S AC / DC modules in operation are turned off; or, if the first total output power is greater than the second total output power, after (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules in operation, the power control method further includes but is not limited to the following two methods: Method 1: Step 1: 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 first total output power is updated by M second control modules to obtain a fourth total output power of all running DC / DC modules; wherein the first DC / DC module is one DC / DC module of the Y running DC / DC modules; Step 2: The third total output power is compared with the fourth total output power by L first control modules, and some of the N AC / DC modules are turned off according to the comparison result.

[0037] 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 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).

[0038] It should be noted that, taking the load as a battery as an example, the process steps in the present application may include but are not limited to any of the following: a battery charging process, a battery static process, a battery discharging process, a battery operating condition testing process, and a DCIR testing process.

[0039] It should be noted that the process 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 operating condition test process, or switching between the DCIR test process and the battery operating condition test process.

[0040] Method 2: Step 1: When the first DC / DC module completes the charge and 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 and 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 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 in the T DC / DC modules). Among them, the first DC / DC module can correspond to a single channel, and a single channel is used to charge and discharge a load; 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.

[0041] It should be noted that, taking a battery as an example, the charge and discharge channel process of a single battery in the present 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.

[0042] 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 turned off according to the comparison result, which may specifically include but is not limited to the following steps: 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 of C, and then C AC / DC modules are determined from the running AC / DC modules to be shut down, wherein C is greater than or equal to 0.

[0043] Optional, when S=N, 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: Method 1: If the first total output power is greater than the second total output power and S=N, one or more DC / DC modules in the T DC / DC modules are controlled to be turned off according to the historical operation time of the DC / DC modules by the M second control modules; specifically, If one of the T DC / DC modules is controlled to be shut down, the DC / DC module with the shortest operating time in the historical operating time is shut down first; or, 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.

[0044] 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.

[0045] Method 2: 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, If one of T DC / DC modules is controlled to be turned off, after the T DC / DC modules are numbered respectively, the DC / DC module with the smallest module number can be turned off first; or, 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 over-power protection of the AC cabinet.

[0046] 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.

[0047] Method 3: If the first total output power is greater than the second total output power, and S=N, one or more DC / DC modules among the T DC / DC modules are controlled to be turned off by the M second control modules simultaneously according to the sequence number of the DC / DC modules and the historical operation time of the DC / DC modules; specifically, 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, wherein C is a positive integer and C is less than T; or, If multiple DC / DC modules among T DC / DC modules are controlled to be turned off, 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 turned off by the M second control modules, where C is a positive integer and C is less than T. It should be noted that mode 3 is adopted to prevent overpower protection of the AC cabinet.

[0048] It should be noted that before comparing the first total output power with the second total output power through the L first control modules, the M second control modules may obtain the historical operating time and module serial numbers of the T DC / DC modules in advance.

[0049] Method 4: 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 through the L first control modules to obtain a first difference power, and 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 through 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 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, where E is a natural number and D is a natural number. It should be noted that mode 5 is adopted to prevent overpower protection of the AC cabinet.

[0050] Method 5: If the first total output power is less than the second total output power, and S=N, Prioritize starting Z DC / DC modules with relatively small module numbers among all module numbers, where the output power of the Z DC / DC modules is equal to the second total output power, and after the Z DC / DC modules complete the charge and discharge channel process / perform step switching, control the start-up (TZ) of the other Z DC / DC modules to start. Wherein, the product of 2*Z is less than or equal to T, and Z can be a positive integer.

[0051] Method 6: If the first total output power is greater than the second total output power and S=N, no additional AC / DC module is started.

[0052] Embodiment 2

[0053] 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 2 As 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 serial numbers of the DC cabinets may be 1#, 2#, ..., M#, respectively), M second control modules, 380V AC power supply, 750V bus circuit, T batteries (batteries); in the second embodiment, the above-mentioned 1 first control module and N AC / DC modules are placed or integrated in the above-mentioned one AC cabinet; in the second embodiment, 1 second control module and 4 DC / DC modules may be placed or integrated in one DC cabinet, and M and T satisfy: the product of 4*M is T; The charge and discharge control system also includes T single channels for charging and discharging T loads (batteries), wherein one DC / DC module corresponds to each single channel.

[0054] 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 to a first control module, and one DC cabinet corresponds one-to-one to a second control module. The first control module can be a DPU, DSP chip or other control chip for controlling functions related to the AC / DC module, and the second control module can also be a DPU, DSP or other control chip for controlling functions related to the DC / DC module.

[0055] 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.

[0056] Those of ordinary skill 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.

[0057] Those skilled in the art can 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.

[0058] 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 composition 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. 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.

[0059] 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 electrical, mechanical or other forms of connection.

[0060] Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling 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 the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc., various media that can store program codes.

[0061] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope 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 comprises: N AC / DC modules, T DC / DC modules, L first control modules for controlling the N AC / DC modules to start or shut down, and M second control modules for respectively controlling each of the T DC / DC modules to start or shut down, 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 to the second control modules one by one; the AC cabinets correspond to the first control modules one by one; The power control method comprises: Calculate, by means of the M second control modules, a first total output power output to the load by the Y DC / DC modules in operation 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 AC / DC modules in operation at the current moment among the N AC / DC modules; 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 AC / DC modules in operation; wherein A is less than S; If the first total output power is greater than the second total output power, then based on the S AC / DC modules that are in operation, (B+1) additional AC / DC modules are started, where B is less than N, S is less than or equal to N, and Y is less than or equal to T.

2. The power control method applied to a charge and discharge control system according to claim 1, characterized in that: The first total output power is compared 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, A AC / DC modules among the S AC / DC modules in operation are turned off, specifically including: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is less than zero, the absolute value of the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient of the A, and then A AC / DC modules among the S AC / DC modules in operation are shut down. Then, the power of the AC / DC modules in operation at the current moment is re-collected by the L first control modules to obtain a third total output power of all AC / DC modules in operation.

3. The power control method applied to a charge and discharge control system according to claim 1, characterized in that: 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, then (B+1) AC / DC modules are started additionally on the basis of the S AC / DC modules that are in operation, specifically including: The first total output power is subtracted from the second total output power by the L first control modules to obtain a first difference power. If the first difference power is greater than zero, the first difference power is divided by the output power of a single AC / DC module by the L first control modules to obtain a quotient of B. Then, based on the S AC / DC modules in operation, (B+1) additional AC / DC modules are started to obtain a third total output power of all the AC / DC modules in operation; 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.

4. The power control method applied to a charge and discharge control system according to claim 3, characterized in that: If the first total output power is less than the second total output power, A of the S AC / DC modules in operation are turned off; or if the first total output power is greater than the second total output power, after (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules in operation, the power control method further includes: 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 first total output power is updated by the M second control modules 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.

5. The power control method applied to a charge and discharge control system according to claim 3, characterized in that: If the first total output power is less than the second total output power, A of the S AC / DC modules in operation are turned off; or if the first total output power is greater than the second total output power, after (B+1) AC / DC modules are additionally started on the basis of the S AC / DC modules in operation, 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 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; 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 through 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 through the L first control modules to obtain a quotient of C, and then C AC / DC modules are determined from the running AC / DC modules to be shut down, wherein C is greater than or equal to 0.

7. The power control method applied to a charge and discharge control system according to claim 1, characterized in that: 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 through the L first control modules to obtain a first difference power, and 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 through 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 starting E DC / DC modules, wherein 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 applied to a charge and discharge control system according to claim 1, characterized in that: 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 turned off according to the historical operation 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 DC / DC modules among the T DC / DC modules are controlled to be turned off according to the sequence number of the DC / DC modules by the M second control modules; or, The M second control modules are used to control one or more DC / DC modules among T DC / DC modules to be shut down according to the sequence number of the DC / DC module and the historical operation time of the DC / DC module, where C is a positive integer and C is less than T.

9. The power control method applied to a charge and discharge control system according to claim 1, characterized in that: 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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