Power control method applied to charge-discharge control system

Abstract

The present application discloses a power control method applied to a charge-discharge control system. The method comprises: calculating, via M second control modules, a first total output power delivered to a load by Y DC / DC modules currently in operation among T DC / DC modules at a current time or during a preset time period starting from the current time; acquiring, via L first control modules, a second total output power of S AC / DC modules currently in operation among N AC / DC modules at the current time; and comparing, via the L first control modules, the first total output power with the second total output power, and if the first total output power is less than the second total output power, turning off A AC / DC modules among the S AC / DC modules currently in operation, where A is less than S, S is less than N, and Y is less than or equal to T. In the present application, by controlling the AC / DC modules in the charge-discharge control system, the output power of an AC cabinet can be dynamically adjusted, thereby achieving an energy-saving effect.

Description

A power control method applied to a charge and discharge control system Technical Field

[0001] This application relates to the field of battery charging and discharging technology, and in particular to a power control method applied to a charging and discharging control system. Background Technology

[0002] In battery formation, capacity grading, and charge / discharge testing systems, for energy saving and wiring convenience, multiple bidirectional inverters are typically connected in parallel on their DC sides to form an AC cabinet on a single bus. These bidirectional inverters are 380Vac to 750Vdc power modules, with power ranging from tens to hundreds of kilowatts. The downstream equipment consists of 750Vdc to 5V DC power modules, with power ranging from one to two kilowatts. The main function of the DC modules is to charge and discharge the battery cells connected to the downstream stage. Multiple DC modules are installed together to form a DC cabinet. Due to the high power of the AC cabinet, it can typically power dozens or even hundreds of other AC cabinets.

[0003] Case 1: If all DC cabinets are charging at full power, then the DC cabinets need to provide power from the AC cabinets to reach the maximum value Pac_max.

[0004] Case 2: If n / 2 batteries are charged at full power and n / 2 batteries are discharged at full power, then the DC cabinet needs the AC cabinet to provide power at the minimum value Pac_min.

[0005] In actual operation, the power provided by the AC cabinet needs to be between the two, denoted 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 changing quantity. This presents the following problems: if the AC cabinet is fully equipped with power, there will be excessive power redundancy, low AC cabinet efficiency, and high losses; at the same time, the large number of AC modules increases cost. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a power control method for a charge / discharge control system. By shutting down N AC / DC modules in the charge / discharge control system, the output power of the AC cabinet can be dynamically adjusted to achieve energy saving. In addition, by switching the operation step / charge / discharge channel process, T DC / DC modules in the charge / discharge control system can be shut down, or additional AC / DC modules can be started to increase the output power of the AC cabinet and prevent over-power protection of the AC cabinet.

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

[0008] N AC / DC modules, T DC / DC modules, L first control modules that control the N AC / DC modules to start or stop, and M second control modules that control the start or stop of each of the T DC / DC modules, where L is less than or equal to N;

[0009] The N AC / DC modules are distributed in L AC cabinets; the T DC / DC modules are distributed in M ​​different DC cabinets, and each DC cabinet corresponds to a second control module; each AC cabinet corresponds to a first control module.

[0010] The power control method includes:

[0011] The first total output power of Y DC / DC modules currently in operation among the T DC / DC modules is calculated by the M second control modules and output to the load at the current time or within a preset time starting from the current time.

[0012] The second total output power of the S AC / DC modules currently in operation among the N AC / DC modules is collected by the L first control modules at the current moment;

[0013] The first total output power is compared 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, then A AC / DC modules out of the S currently running AC / DC modules will be shut down; where A is less than S.

[0015] If the first total output power is greater than the second total output power, then (B+1) more AC / DC modules will be started based on the S AC / DC modules that are currently running, 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 one 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 less than the second total output power, then A AC / DC modules out of the S running AC / DC modules are shut down. Specifically, this includes:

[0017] The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 the quotient A. Then, A AC / DC modules out of the S running AC / DC modules are turned off. Next, the power of the running AC / DC modules at the current moment is re-acquired by the L first control modules to obtain the third total output power of all running AC / DC modules.

[0018] In one 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, then (B+1) additional AC / DC modules are started in addition to the S currently running AC / DC modules. Specifically, this includes:

[0019] The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 value B. Then, based on the S AC / DC modules that are currently running, (B+1) AC / DC modules are started to obtain the third total output power of all running AC / DC modules. Wherein, B is greater than or equal to 0, and the sum of S and (B+1) is less than or equal to N.

[0020] In one optional implementation, if the first total output power is less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules are shut down; or, if the first total output power is greater than the second total output power, then in addition to the S currently running AC / DC modules, (B+1) AC / DC modules are started, and the power control method further includes:

[0021] When the first DC / DC module performs a step switching at any time during the current moment or within a preset time period 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 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;

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

[0023] In one optional implementation, if the first total output power is less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules are shut down; or, if the first total output power is greater than the second total output power, then in addition to the S currently running AC / DC modules, (B+1) AC / DC modules are started, and the power control method further includes:

[0024] When the first DC / DC module completes the charging and discharging channel process at any time during the current moment or within a preset time period 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 operating 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 based on the comparison result, some of the N AC / DC modules are turned off.

[0026] In one optional implementation, the step of comparing the third total output power with the fourth total output power through the L first control modules, and shutting down some of the N AC / DC modules based on the comparison result, specifically includes:

[0027] 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 value C. Then, C AC / DC modules are selected from the running AC / DC modules to be shut down, where C is greater than or equal to 0.

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

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

[0030] The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 DC / DC module by the L first control modules to obtain the quotient value D.

[0031] Based on the operation of Y DC / DC modules, the M second control modules 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.

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

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

[0034] If the first total output power is greater than the second total output power, and S=N, then the M second control modules control one or more of the T DC / DC modules to shut down according to the sequence number of the DC / DC modules; or,

[0035] The M second control modules simultaneously control one or more of the T DC / DC modules to shut down based on the serial number of the DC / DC module and the historical runtime of the DC / DC module, where C is a positive integer and C is less than T.

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

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

[0038] This application discloses a power control method applied to a charge / discharge control system, wherein the charge / discharge control system includes: N AC / DC modules, T DC / DC modules, L first control modules that control the start-up or shutdown of the N AC / DC modules, and M second control modules that respectively control the start-up or shutdown of each of the T DC / DC modules, wherein 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, with each DC cabinet corresponding to a second control module; each AC cabinet corresponds to a first control module. The power control method may include, but is not limited to: calculating the first total output power of Y operating DC / DC modules among the T DC / DC modules at the current time or within a preset time starting from the current time using the M second control modules; acquiring the second total output power of S operating AC / DC modules among the N AC / DC modules at the current time using the L first control modules; comparing the first total output power with the second total output power using the L first control modules; if the first total output power is less than the second total output power, then shutting down A AC / DC modules among the S operating AC / DC modules, where A is less than S.

[0039] If the first total output power is greater than the second total output power, then in addition to the S AC / DC modules that are currently running, (B+1) AC / DC modules will be started, 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 employing this application, the output power of the AC cabinet can be dynamically adjusted by controlling the start-up or shutdown of N AC / DC modules in the charging and discharging control system, thereby achieving energy-saving effects. In addition, by switching the work step mode / charging and discharging channel process, the T DC / DC modules in the charging and discharging control system can be shut down, or additional AC / DC modules can be started to increase the output power of the AC cabinet and prevent the AC cabinet from overpowering. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 is a flowchart illustrating a power control method for a charge-discharge control system provided in this application;

[0043] Figure 2 is a schematic diagram of a charging and discharging control system provided in this application. Detailed Implementation

[0044] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

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

[0046] Example 1

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

[0048] N AC / DC modules (AC-DC converters), T DC / DC modules (DC-DC converters), L first control modules that control the N AC / DC modules to start or stop, and M second control modules that control the start or stop of each of the T DC / DC modules, where L is less than or equal to N;

[0049] An AC / DC module is a converter that converts alternating current (AC) to direct current (DC). A DC / DC module is a converter that converts one type of direct current (DC) to another.

[0050] The N AC / DC modules are distributed in L AC cabinets (wherein, the AC cabinet can be an AC power distribution cabinet); the T DC / DC modules are distributed in M ​​different DC cabinets (wherein, the DC cabinet can be a DC power distribution cabinet); each DC cabinet corresponds one-to-one with a second control module (that is, 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); each AC cabinet corresponds one-to-one with a first control module (that is, 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 (such as 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 aforementioned high-voltage bus for power transmission.

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

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

[0058] Figure 1 illustrates a schematic flowchart of a power control method applied to a charge and discharge control system.

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

[0060] S101. Calculate the first total output power of Y DC / DC modules currently in operation among the T DC / DC modules, which is output to the load at the current time or within a preset time starting from the current time, through the M second control modules.

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

[0062] S102. The second total output power of the S AC / DC modules currently in operation among the N AC / DC modules is acquired through the L first control modules.

[0063] Specifically, the second total output power is the total output power of the S currently operating AC / DC modules to the aforementioned T DC / DC modules at the current moment; or,

[0064] The second total output power is the total output power of the S operating AC / DC modules at the current moment, which is then output to the aforementioned T DC / DC modules via the high-voltage bus.

[0065] S103. 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 less than the second total output power, A AC / DC modules out of the S running AC / DC modules are shut down. 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 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 this 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 less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules are shut down. Specifically, this can be done in the following ways:

[0070] The first total output power is obtained by subtracting the second total output power from the first total output power through L first control modules. 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 through L first control modules to obtain a quotient value A. Then, A AC / DC modules out of the S currently running AC / DC modules are shut down (function: to reduce the output power of the AC cabinet while meeting the power requirements of the DC cabinet, thus achieving energy saving). Next, the power of the running AC / DC modules is re-acquired by L first control modules at the current moment to obtain the third total output power of all running AC / DC modules. That is, the third total output power is used as the total output power of the AC / DC modules still running after shutting down A AC / DC modules out of the S currently running AC / DC modules.

[0071] In this 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) additional AC / DC modules are started in addition to the S AC / DC modules that are currently running. Specifically, this may include, but is not limited to:

[0072] The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 value B. Then, based on the S AC / DC modules currently in operation, (B+1) AC / DC modules are added and started to finally obtain the third total output power of all operating AC / DC modules (function: when the AC cabinet is not at its maximum power output, and the actual working power of the DC cabinet is greater than the maximum power provided by the AC cabinet, (B+1) AC / DC modules are added and started to increase the output power of the AC cabinet, meet the power requirements of the DC cabinet, and prevent the AC cabinet from overpowering). That is, the third total output power is used here as the total operating power of all operating AC / DC modules after adding (B+1) AC / DC modules to the S operating AC / DC modules.

[0073] Where B is greater than or equal to 0, and 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, then A AC / DC modules out of the S currently running AC / DC modules will be shut down; or, if the first total output power is greater than the second total output power, then in addition to the S currently running AC / DC modules, (B+1) AC / DC modules will be started. The power control method may also include, but is not limited to, the following two methods:

[0075] Method 1:

[0076] Step 1: When the first DC / DC module performs a step switching at any time during the current time or within a preset time period starting from the current time, and when the output power of the first DC / DC module is set to 0, the first total output power is updated through M second control modules to obtain the 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: Compare the third total output power with the fourth total output power through L first control modules, and shut down some of the N AC / DC modules based on the comparison results.

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

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

[0080] It should be noted that the switching of operation steps may include, but is not limited to: switching between the battery charging process and the battery resting process, switching between the battery discharging process and the battery resting process, switching between the battery resting process and the battery operating condition test process, or switching between the DCIR test process and the battery operating condition test process.

[0081] Method 2:

[0082] Step 1: When the first DC / DC module completes the charge / discharge channel process at any time during the current moment or within a preset time period 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 operating DC / DC modules. It should be noted that the fourth total output power here is: the total output power of T DC / DC modules when the first DC / DC module completes the charge / discharge channel process at any time during the current moment or within a preset time period starting from the current moment, and when the output power of the first DC / DC module is set to 0 (or: the total output power of the T operating DC / DC modules when the output power of the first DC / DC module is set to 0). The first DC / DC module can correspond to a single channel, and a single channel is used to charge and discharge one load.

[0083] Step 2: The third total output power is compared with the fourth total output power through the L first control modules. Based on the comparison result, some of the AC / DC modules in the N AC / DC modules are turned off.

[0084] It should be noted that, taking a battery as the load, the charging and discharging 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 resting process.

[0085] It should be noted that the third total output power is compared with the fourth total output power through L first control modules. Based on the comparison result, some AC / DC modules among the N AC / DC modules are shut down. Specifically, this may include, but is not limited to, the following steps:

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

[0087] Optionally, when S=N,

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

[0089] Method 1:

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

[0091] If one of the T DC / DC modules needs to be shut down, the module with the shortest runtime in the historical runtime history should be shut down first; or,

[0092] If multiple DC / DC modules out of T are to be shut down, priority should be given to shutting down the DC / DC modules with relatively shorter operating times in the historical running time. It should be noted that method 1 should be used to prevent over-power protection of the AC cabinet.

[0093] 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 can 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, then the M second control modules control one or more of the T DC / DC modules to shut down according to the sequence number of the DC / DC modules. Specifically,

[0096] If you want to shut down one of T DC / DC modules, after numbering the T DC / DC modules, you can prioritize shutting down the DC / DC module with the smallest module number; or,

[0097] If multiple DC / DC modules out of T DC / DC modules need to be shut down, after numbering the T DC / DC modules, priority can be given to shutting down the DC / DC modules with relatively smaller module numbers. It should be noted that method 2 is used to prevent AC cabinet overpower protection.

[0098] 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 can 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, then the M second control modules simultaneously control one or more of the T DC / DC modules to shut down based on the DC / DC module's serial number and its historical operating time; specifically,

[0101] If one of the T DC / DC modules is shut down, and if C DC / DC modules with the same historical runtime and the shortest historical runtime are simultaneously present, the M second control modules will preferentially shut down the DC / DC module with the smallest sequence number among the C DC / DC modules, where C is a positive integer and C is less than T; or,

[0102] If multiple DC / DC modules out of T DC / DC modules are to be shut down, and if C DC / DC modules with the same historical operating time and the shortest historical operating time are simultaneously present, the M second control modules will preferentially shut down the C DC / DC modules with the smaller sequence number, where C is a positive integer and C is less than T. It should be noted that method 3 is used to prevent over-power protection of the AC cabinet.

[0103] 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 can obtain the historical running time and module serial number 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] The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 DC / DC module by the L first control modules to obtain the quotient value D.

[0107] Based on the operation of Y DC / DC modules controlled by the M second control modules, E more DC / DC modules are then activated, 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 and D are natural numbers. It should be noted that method 5 is used to prevent over-power 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 activating the Z DC / DC modules with the smallest module numbers among all modules. The output power of these Z DC / DC modules is equal to the second total output power. After these Z DC / DC modules complete their charge / discharge channel process / perform a step switch, the other Z DC / DC modules in the start-up (TZ) step are then activated. 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, then no additional AC / DC module will be added.

[0113] Example 2

[0114] When L is 1 in the aforementioned embodiments, Figure 2 exemplarily shows a schematic diagram of a charging and discharging control system. As shown in Figure 2, the charging and discharging 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 (where the serial numbers of the DC cabinets can be 1#, 2#, ..., M#), M second control modules, a 380V AC power supply, a 750V bus circuit, and T batteries (cells). In the second embodiment, the aforementioned 1 first control module and N AC / DC modules are all placed or integrated in the aforementioned AC cabinet. In the second embodiment, 1 second control module and 4 DC / DC modules can be placed or integrated in a DC cabinet, and M and T satisfy the condition that the product of 4*M is T.

[0115] 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 one single channel.

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

[0117] Figures 1-2 are only used to illustrate the embodiments of this application and should not be used to limit the scope of protection of this application.

[0118] Those skilled in the art will recognize that the device and algorithm steps of the various examples described in conjunction with the embodiments disclosed in this application can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of each example have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art 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.

[0119] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working process of the equipment and system described above can be referred to the corresponding process in the foregoing 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 composition and steps of each example have been described. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art 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 interface, device, system or unit, or may be an electrical, mechanical or other form of connection.

[0122] Based on this understanding, the technical solution of this application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0123] The above description is merely a specific embodiment of this application, but the scope of protection of this 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 this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power control method applied to a charge / discharge control system, characterized in that, The charging and discharging control system includes: N AC / DC modules, T DC / DC modules, L first control modules that control the N AC / DC modules to start or stop, and M second control modules that control the start or stop of each of the T DC / DC modules, where L is less than or equal to N; The N AC / DC modules are distributed in L AC cabinets; the T DC / DC modules are distributed in M ​​different DC cabinets, and each DC cabinet corresponds to a second control module; each AC cabinet corresponds to a first control module. The power control method includes: The first total output power of Y DC / DC modules currently in operation among the T DC / DC modules is calculated by the M second control modules and output to the load at the current time or within a preset time starting from the current time. The second total output power of the S AC / DC modules currently in operation among the N AC / DC modules is collected by the L first control modules at the current moment; 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 less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules will be shut down; where A is less than S. If the first total output power is greater than the second total output power, then (B+1) more AC / DC modules will be started based on the S AC / DC modules that are currently running, wherein 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 applied to a charge / discharge control system as described in 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 less than the second total output power, then A AC / DC modules out of the S running AC / DC modules are shut down, specifically including: The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 the quotient A. Then, A AC / DC modules out of the S running AC / DC modules are turned off. Next, the power of the running AC / DC modules at the current moment is re-acquired by the L first control modules to obtain the third total output power of all running AC / DC modules.

3.

3. The power control method applied to a charge / discharge control system as described in 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) additional AC / DC modules are started in addition to the S currently running AC / DC modules. Specifically, this includes: The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 value B. Then, based on the S AC / DC modules that are currently running, (B+1) AC / DC modules are started to obtain the third total output power of all running AC / DC modules. Wherein, B is greater than or equal to 0, and the sum of S and (B+1) is less than or equal to N.

4. The power control method applied to a charge / discharge control system as described in claim 3, characterized in that, If the first total output power is less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules are shut down; or, if the first total output power is greater than the second total output power, then in addition to the S currently running AC / DC modules, (B+1) AC / DC modules are started. The power control method further includes: When the first DC / DC module performs a step switching at any time during the current moment or within a preset time period 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 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 based on the comparison result, some of the N AC / DC modules are turned off.

5. The power control method applied to a charge / discharge control system as described in claim 3, characterized in that, If the first total output power is less than the second total output power, then A AC / DC modules out of the S currently running AC / DC modules are shut down; or, if the first total output power is greater than the second total output power, then in addition to the S currently running AC / DC modules, (B+1) AC / DC modules are started. The power control method further includes: When the first DC / DC module completes the charging and discharging channel process at any time during the current moment or within a preset time period 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 operating DC / DC modules; wherein, the first DC / DC module is one of the Y DC / DC modules; The L first control modules compare the third total output power with the fourth total output power, and based on the comparison result, some of the N AC / DC modules are shut down.

6. The power control method applied to a charge / discharge control system as described in claim 4 or 5, characterized in that, The step of comparing the third total output power with the fourth total output power through the L first control modules, and shutting down some of the N AC / DC modules based on 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 value C. Then, C AC / DC modules are selected from the running AC / DC modules to be shut down, where C is greater than or equal to 0.

7. The power control method applied to a charge / discharge control system as described in 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, The first total output power is subtracted from the second total output power by the L first control modules to obtain the 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 DC / DC module by the L first control modules to obtain the quotient value D. Based on the operation of Y DC / DC modules, the M second control modules 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.

8. The power control method applied to a charge / discharge control system as described in 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, then the M second control modules control one or more of the T DC / DC modules to shut down based on the historical operating time of the DC / DC modules; or, If the first total output power is greater than the second total output power, and S=N, then the M second control modules control one or more of the T DC / DC modules to shut down according to the sequence number of the DC / DC modules; or, The M second control modules simultaneously control one or more of the T DC / DC modules to shut down based on the serial number of the DC / DC module and the historical runtime 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 / discharge control system as described in 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, then no additional AC / DC module will be added.

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