CN118199240A - Method and device for standby electric control, power supply system of battery changing cabinet and control unit - Google Patents
Method and device for standby electric control, power supply system of battery changing cabinet and control unit Download PDFInfo
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Abstract
The embodiment of the disclosure provides a method and a device for standby electric control, a power supply system of a battery changing cabinet and a control unit, and relates to the technical field of energy storage equipment. By monitoring the bus voltage of the direct current bus, under the condition that the bus voltage is smaller than a first voltage threshold, part or all of the non-standby DC/DC units are closed in a grading manner according to different closing strategies, and/or part or all of the standby DC/DC units are controlled in a grading manner according to different reverse power supply strategies to reversely supply power, a mode of closing the non-standby DC/DC units and/or controlling the standby DC/DC units to reversely supply power can be adopted to provide long-time standby power for the control units, the time of reliably standby power of a power supply system of the power conversion cabinet is effectively prolonged, the maintainability of the system is improved, and the use experience of a power conversion user is improved.
Description
Technical Field
The disclosure relates to the technical field of energy storage equipment, in particular to a method and a device for standby electric control, a power supply system of a battery changing cabinet and a control unit.
Background
The power supply system of the battery changing cabinet is an emerging automatic system for providing battery charging and changing.
Fig. 1 is a schematic structural diagram of a power supply system of a power conversion cabinet provided by the related art, as shown in fig. 1, the power supply system 1 of the power conversion cabinet includes an AC/DC unit 11, a control unit 12, a DC bus 13 and a communication bus 14, the AC/DC unit 11 is used for connecting with a mains supply, the mains supply is converted into DC by AC/DC to be connected to the DC bus 13, a plurality of batteries 2 are also connected to the DC bus 13 so as to realize battery charging, and the batteries 2 and the AC/DC unit 11 can be connected to the control unit 12 through the communication bus 14, so that a user can monitor and control the power supply system of the power conversion cabinet in the background, wherein the control unit 12 is also provided with power supply by the DC bus 13.
When the commercial power is abnormal, such as unstable or power failure, the control unit loses power, and under the condition that the user cannot monitor and control the power supply system of the power conversion cabinet in the background, the maintainability of the system is affected, and the use experience of the power conversion user is reduced.
In order to solve the above technical problems, an additional standby power supply is usually deployed in the related art, for example, a lead-acid storage battery dedicated to the control unit is used to realize the standby of the control unit, which increases the cost, and the capacity of the lead-acid storage battery is usually smaller, so that the standby power for a longer time cannot be realized.
Disclosure of Invention
The embodiment of the disclosure aims to provide a method for standby electric control, a power supply system of a battery changing cabinet and a control unit.
To solve the above technical problems, embodiments of the present disclosure are achieved by the following aspects.
According to a first aspect of an embodiment of the present disclosure, there is provided a method for standby electric control, applied to a control unit in a power supply system of a power conversion cabinet, where the power supply system of the power conversion cabinet includes an AC/DC unit for connecting to a mains supply and a plurality of DC/DC units for connecting to a battery, the AC/DC unit, the DC/DC unit and the control unit are all connected to a direct current bus, the AC/DC unit and the DC/DC unit are all connected to the control unit, and at least one standby electric DC/DC unit for supplying power in reverse direction is included in the DC/DC unit, the method includes: monitoring the bus voltage of the direct current bus; under the condition that the bus voltage is smaller than a first voltage threshold, part or all of the non-standby DC/DC units are turned off in a grading manner according to different turn-off strategies, and/or part or all of the standby DC/DC units are controlled in a grading manner according to different reverse power supply strategies to reversely supply power; wherein the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
According to a second aspect of the embodiments of the present disclosure, there is provided an apparatus for standby electric control, applied to a control unit in a power supply system of a power conversion cabinet, the power supply system of the power conversion cabinet including an AC/DC unit for connecting to a mains supply and a plurality of DC/DC units for connecting to a battery, the AC/DC unit, the DC/DC unit and the control unit being connected to a direct current bus, the AC/DC unit and the DC/DC unit being connected to the control unit, the DC/DC unit including at least one standby electric DC/DC unit for supplying power in reverse, the apparatus comprising: the monitoring module is used for monitoring the bus voltage of the direct current bus; the control module is used for grading and closing part or all of the non-standby DC/DC units according to different closing strategies under the condition that the bus voltage is smaller than a first voltage threshold value, and/or grading and controlling part or all of the standby DC/DC units to be reversely powered according to different reverse power supply strategies; wherein the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
According to a third aspect of embodiments of the present disclosure, there is provided a power conversion cabinet power supply system, including an AC/DC unit for connecting to a mains supply, a plurality of DC/DC units for connecting to a battery, and a control unit for executing the method of standby electric control in the first aspect, where the AC/DC unit, the DC/DC unit, and the control unit are all connected to a direct current bus, and the AC/DC unit and the DC/DC unit are both connected to the control unit, and the DC/DC unit includes at least one standby electric DC/DC unit for reverse power supply.
According to a fourth aspect of embodiments of the present disclosure, there is provided a control unit including: at least one processor; and a memory arranged to store at least one computer executable instruction which, when executed, performs the method of standby control of the first aspect using the at least one processor.
By adopting the technical scheme, under the condition that the bus voltage is smaller than the first voltage threshold, part or all of the non-standby DC/DC units are closed in a grading manner according to different closing strategies, and/or part or all of the standby DC/DC units are controlled in a grading manner according to different reverse power supply strategies, the mode of closing the non-standby DC/DC units and/or controlling the standby DC/DC units to supply power reversely can be adopted to provide longer standby power for the control units, the time of reliably standby power of the power supply system of the power conversion cabinet is effectively prolonged, the maintainability of the system is improved, and the use experience of a power conversion user is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 shows a schematic structural diagram of a power supply system of a power conversion cabinet provided by the related art;
Fig. 2 shows a schematic structural diagram of a power supply system of a power conversion cabinet according to an embodiment of the present disclosure;
FIG. 3 illustrates a schematic flow diagram of a method of providing backup control according to an embodiment of the present disclosure;
FIG. 4 illustrates another flow diagram of a method of providing backup control according to an embodiment of the present disclosure;
FIG. 5 shows a further flow diagram of a method of preparing electrical controls provided by embodiments of the present disclosure;
FIG. 6 shows a further flow diagram of a method of preparing electrical controls provided by embodiments of the present disclosure;
fig. 7 illustrates a schematic structure of a DC/DC unit provided by an embodiment of the present disclosure;
FIG. 8 shows a block diagram of an apparatus for standby electrical control provided by an embodiment of the present disclosure;
Fig. 9 shows a schematic structural diagram of a control unit provided by an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the technical solutions in the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure, shall fall within the scope of the present disclosure.
Fig. 2 shows a schematic structural diagram of a power supply system of a power conversion cabinet provided by an embodiment of the disclosure, as shown in fig. 2, the power supply system 1 of the power conversion cabinet includes an AC/DC unit 11 for connecting to a mains supply, a plurality of DC/DC units 15 for connecting to a battery, and a control unit 12, where the AC/DC unit 11, the DC/DC unit 15, and the control unit 12 are all connected to a DC bus 13, and the AC/DC unit 11, the DC/DC unit 15 are all connected to the control unit 12, and in some possible implementations, the AC/DC unit 11, the DC/DC unit 15, and the control unit 12 may be connected to each other through a communication bus 14. The DC/DC unit 15 includes at least one standby DC/DC unit 151 for reverse power supply. Each DC/DC unit 15 (including the standby DC/DC unit) may be connected to one or more batteries 2.
Fig. 3 shows a schematic flow chart of a method for preparing electric control according to an embodiment of the disclosure, where the method is applied to a control unit in a power supply system of a power conversion cabinet, as shown in fig. 3, and the method may include the following steps:
in step S101, the bus voltage of the dc bus is monitored.
In some possible implementations, the busbar voltage of the dc busbar may be monitored by a technical solution in the related art, and a detailed description is omitted here.
In step S102, under the condition that the bus voltage is smaller than the first voltage threshold, part or all of the non-standby DC/DC units are turned off in a grading manner according to different turn-off strategies, and/or part or all of the standby DC/DC units are controlled in a grading manner according to different reverse power supply strategies to supply power reversely.
Wherein, the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
Under the condition that the commercial power for supplying power to the power conversion cabinet power supply system is abnormal (such as unstable voltage or abnormal power failure), the bus voltage of the direct current bus can be gradually reduced, the control unit can ensure that each subsystem of the power conversion cabinet power supply system is not powered down under the condition that the bus voltage is smaller than a first voltage threshold value based on the monitored bus voltage, for example, the normal power supply of the control unit can be ensured, the maintainability of the system is improved, the state of the power conversion cabinet power supply system can be displayed, and the use experience of a power conversion user is improved.
In some embodiments, different backup measures may be taken depending on the degree and/or rate of the bus voltage drop.
In some possible implementations, when the bus voltage drops to a low degree and/or the speed of the drop is low, the charging of the battery connected to the non-standby DC/DC unit can be stopped by turning off part or all of the non-standby DC/DC unit, so as to reduce the load on the DC bus, and maintain the stability of the bus voltage.
In some possible implementations, when the bus voltage drops to a low degree and/or the speed of the drop is low, part or all of the standby DC/DC units can be controlled to supply power reversely, so as to keep the bus voltage stable.
In another possible implementation manner, when the bus voltage drops to a greater extent or the bus voltage drops faster, the charging of the battery connected to the non-standby DC/DC unit may also be stopped, so as to reduce the load on the direct current bus, and control part or all of the standby DC/DC units to supply power in the opposite direction, so as to jointly keep the bus voltage stable.
By adopting the technical scheme, a mode of closing the non-standby DC/DC unit and/or controlling the standby DC/DC unit to reversely supply power can be adopted to provide long-time standby power for the control unit, so that the reliable standby power time of the power supply system of the power conversion cabinet is effectively prolonged, the maintainability of the system is improved, and the use experience of a power conversion user is improved.
In some embodiments, some or all of the non-standby DC/DC units may be turned off in stages according to different turn-off strategies in the following manner.
In mode 1, when the bus voltage is smaller than the first voltage threshold and greater than or equal to the second voltage threshold, the partial non-standby DC/DC unit is turned off.
Mode 2, turning off all the non-standby DC/DC cells when the bus voltage is less than a second voltage threshold, the second voltage threshold being less than the first voltage threshold.
It will be appreciated that different shutdown strategies may be divided into more levels, for example, all the non-standby DC/DC units are divided into k levels, each level corresponds to a different voltage threshold condition, the i-th level corresponds to turning off N i non-standby DC/DC units, where 1N i N and N i-1≤Ni, N are the total number of non-standby DC/DC units, and in the case that the bus voltage meets the voltage threshold condition of the i-th level, the bus voltage may be kept stable by turning off N i non-standby DC/DC units.
By adopting the technical scheme, the non-standby DC/DC units can be gradually closed to keep the bus voltage stable, and simultaneously, the situation that a plurality of non-standby DC/DC units are closed at one time is avoided as much as possible, so that the service influence on the power supply system of the power conversion cabinet is reduced, and the experience of the power conversion user is further improved.
In some embodiments, the number of the standby DC/DC units may be plural, and part or all of the standby DC/DC units may be controlled in a hierarchical manner according to different reverse power supply strategies in the following manner.
In mode 1, when the bus voltage is smaller than the third voltage threshold and greater than or equal to the fourth voltage threshold, the first number of standby DC/DC units are controlled to supply power reversely.
And in the mode 2, controlling the second number of standby DC/DC units to reversely supply power under the condition that the bus voltage is smaller than the fourth voltage threshold.
Wherein the third voltage threshold is less than the first voltage threshold, the fourth voltage threshold is less than the third voltage threshold, and the second number is greater than the first number.
It can be understood that different reverse power supply strategies can be divided into more levels, for example, all the non-standby DC/DC units are divided into M levels, each level corresponds to different voltage threshold conditions, the ith level corresponds to turning off the M i non-standby DC/DC units, wherein 1.ltoreq.m i.ltoreq.m, and M i-1≤Mi, M is the total number of non-standby DC/DC units, and in the case that the bus voltage meets the voltage threshold conditions of the ith level, the stability of the bus voltage can be maintained by controlling the M i standby DC/DC units to supply power in the reverse direction.
By adopting the technical scheme, the voltage stability of the bus can be kept in a mode of controlling the reverse power supply of the power preparation DC/DC unit in a grading manner, the reverse power supply of the power preparation DC/DC unit is gradually started, the service influence on the power supply system of the power conversion cabinet is reduced as much as possible, and the experience of a power conversion user is further improved.
In some embodiments, the back power supply of some or all of the standby DC/DC units may also be controlled in stages according to different back power supply strategies in the following manner.
In mode 1, when the bus voltage is smaller than the third voltage threshold and greater than or equal to the fourth voltage threshold, the standby DC/DC unit is controlled to supply power reversely according to the first reverse power supply parameter.
And in the mode 2, controlling the standby power DC/DC unit to supply power reversely according to the second reverse power supply parameter under the condition that the bus voltage is smaller than the fourth voltage threshold.
The third voltage threshold is smaller than the first voltage threshold, the fourth voltage threshold is smaller than the third voltage threshold, and the discharge rate of the battery connected with the standby DC/DC unit when working at the second reverse power supply parameter is larger than the discharge rate of the battery connected with the standby DC/DC unit when working at the first reverse power supply parameter.
For example, the reverse power supply parameter may be a discharge rate or an hour rate, and when the battery connected to the standby DC/DC unit works at a larger discharge rate, a stronger reverse power supply capability may be provided, but the reverse power supply capability is limited by the electric quantity of the battery, and the duration of the reverse power supply is shorter.
It will be appreciated that different reverse power strategies may also be divided into more levels, each level corresponding to a different voltage threshold condition and reverse power parameters.
By adopting the technical scheme, the voltage of the bus can be kept stable in a mode of reversely supplying power to the power preparation DC/DC unit in a grading control manner, and meanwhile, reverse power supply is performed through different reverse power supply parameters, so that the influence on the power preparation DC/DC unit is reduced as much as possible, and the experience of a power conversion user is further improved.
It should be noted that in the above embodiment, part or all of the non-standby DC/DC units are turned off in a grading manner according to different turn-off strategies, and/or part or all of the standby DC/DC units are turned off in a grading manner according to different reverse power supply strategies, so that reverse power supply can be adopted alone, or can be flexibly combined, for example, m non-standby DC/DC units can be turned off, n1 standby DC/DC units are controlled to be reversely powered by adopting a first power supply parameter, and n2 standby DC/DC units are controlled to be reversely powered by adopting a second power supply parameter.
In some embodiments, after all the non-standby DC/DC units are turned off and all the standby DC/DC units are controlled to supply power in the reverse direction, an alarm of standby failure can be timely displayed under the condition that the bus voltage cannot be kept stable, so that a user can timely process corresponding faults through modes such as on-site processing.
Fig. 4 shows another schematic flow chart of a method for preparing electric control according to an embodiment of the disclosure, as shown in fig. 4, the method further includes the following steps:
In step S103, battery information of the battery to which each DC/DC unit is connected is acquired.
The battery information may include a battery power, which may be an absolute power or a relative power (e.g., a power percentage), for selecting the standby DC/DC unit according to the battery power of the connected battery.
The battery information may further include further information, for example, interface model information of the battery, lifetime information of the battery, etc., so that the DC/DC unit connected to the specific model battery or the newer battery may be flexibly selected as the standby DC/DC unit according to the battery information of the battery connected to the DC/DC unit.
In step S104, a standby DC/DC unit is determined from the plurality of DC/DC units according to the battery information.
Fig. 5 shows a further flowchart of a method for preparing electric control according to an embodiment of the disclosure, as shown in fig. 5, step S104 may include the following steps:
in step S1041, a target DC/DC unit having a battery power greater than a preset power threshold is determined from the plurality of DC/DC units.
In step S1042, one or more DC/DC units with the non-highest battery power in the target DC/DC unit are used as the standby DC/DC units.
In some possible implementations, the battery with the highest battery charge may be reserved, and preferably provided as the battery to be replaced for the user to use. And taking one or more than one DC/DC units with the non-highest battery electric quantity connected with the battery as the standby DC/DC unit, it can be understood that after the battery with the highest battery electric quantity is replaced by the electricity replacing user, for example, the user replaces the battery with the highest battery with a battery with insufficient electric quantity, the steps of steps S103-S104 can be re-adopted to re-determine the standby DC/DC unit.
By adopting the technical scheme, the standby power DC/DC units can be dynamically determined from the plurality of DC/DC units, so that the service can be normally provided for a power conversion user while the stability of the bus voltage is maintained, and the experience of the power conversion user is further improved.
Fig. 6 shows a further flowchart of a method for preparing an electric control according to an embodiment of the disclosure, as shown in fig. 6, where the method further includes the following steps:
in step S105, in the case where the bus voltage is greater than the fifth voltage threshold and less than or equal to the sixth voltage threshold, the reverse power supply of the standby dc\dc unit in the reverse power supply state is stopped in stages.
Wherein the fifth voltage threshold is greater than the first voltage threshold and the sixth voltage threshold is greater than the fifth voltage threshold.
After the abnormal recovery of the mains supply, the busbar voltage of the direct current busbar gradually recovers, and the reverse power supply of the standby power DC/DC unit in the reverse power supply state can be stopped in a grading manner under the condition that the busbar voltage is larger than a fifth voltage threshold.
The level of the reverse power supply of the step-stop standby power DC/DC unit can be the same as or different from the level of the reverse power supply of the step-control standby power DC/DC unit, and the application is not limited to this. By stopping the reverse power supply of the standby DC/DC unit in stages, the reverse power supply of the standby DC/DC unit can be stopped step by step while maintaining the stability of the bus voltage.
In step S106, when the bus voltage is greater than the sixth voltage threshold, the reverse power supply of the standby DC/DC unit in the reverse power supply state is stopped, and part or all of the non-standby DC/DC units are started in stages according to different starting strategies.
Under the condition that the bus voltage is larger than a sixth voltage threshold, the reverse power supply of the standby DC/DC unit in the reverse power supply state is stopped, the non-standby DC/DC unit can be started, and the battery connected with the standby DC/DC unit and the non-standby DC/DC unit is conveniently charged through the direct current bus, so that normal power conversion service is restored.
The level of the step-starting non-standby DC/DC unit may be the same as or different from the level of the step-closing non-standby DC/DC unit, which is not limited in the present application.
By adopting the technical scheme, after the commercial power is recovered, the reverse power supply of the standby power DC/DC units in the reverse power supply state can be gradually stopped in a grading manner, and normal power conversion service can be recovered in a grading manner according to different starting strategies by starting part or all of the non-standby power DC/DC units, so that the experience of a power conversion user is further improved.
Fig. 7 shows a schematic structural diagram of a DC/DC unit provided by an embodiment of the present disclosure, as shown in fig. 7, each DC/DC unit 15 is connected to one or more batteries 2, each DC/DC unit 15 includes a charging DC/DC subunit 152 and a standby DC/DC subunit 153, and the DC bus 13 charges one or more batteries 2 through the charging DC/DC subunit 152, and the one or more batteries 2 reversely supply power to the DC bus 13 through the standby DC/DC subunit 153.
Fig. 8 shows a block diagram of an apparatus for standby electric control according to an embodiment of the present disclosure, and as shown in fig. 8, the apparatus 100 for standby electric control is applied to a control unit in a power supply system of a power conversion cabinet, and includes:
and the monitoring module 110 is used for monitoring the bus voltage of the direct current bus.
The control module 120 is configured to stage-close part or all of the non-standby DC/DC units according to different shutdown strategies and/or stage-control part or all of the standby DC/DC units to be reversely powered according to different reverse power supply strategies when the bus voltage is less than the first voltage threshold; wherein, the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
Optionally, the control module 120 is further configured to:
closing a part of non-standby DC/DC unit under the condition that the bus voltage is smaller than a first voltage threshold and larger than or equal to a second voltage threshold; or alternatively
And under the condition that the bus voltage is smaller than a second voltage threshold, all the non-standby DC/DC units are turned off, and the second voltage threshold is smaller than the first voltage threshold.
Optionally, the number of standby DC/DC units is plural, and the control module 120 is further configured to:
controlling the first number of standby DC/DC units to reversely supply power under the condition that the bus voltage is smaller than a third voltage threshold and larger than or equal to a fourth voltage threshold; or alternatively
Controlling the second number of standby DC/DC units to reversely supply power under the condition that the bus voltage is smaller than a fourth voltage threshold;
Wherein the third voltage threshold is less than the first voltage threshold, the fourth voltage threshold is less than the third voltage threshold, and the second number is greater than the first number.
Optionally, the control module 120 is further configured to:
controlling the standby power DC/DC unit to supply power reversely according to the first reverse power supply parameter under the condition that the bus voltage is smaller than the third voltage threshold and larger than or equal to the fourth voltage threshold; or alternatively
Controlling the standby power DC/DC unit to reversely supply power according to the second reverse power supply parameter under the condition that the bus voltage is smaller than the fourth voltage threshold;
The third voltage threshold is smaller than the first voltage threshold, the fourth voltage threshold is smaller than the third voltage threshold, and the discharge rate of the battery connected with the standby DC/DC unit when working at the second reverse power supply parameter is larger than the discharge rate of the battery connected with the standby DC/DC unit when working at the first reverse power supply parameter.
Optionally, the control module 120 is further configured to:
Acquiring battery information of batteries connected with each DC/DC unit;
and determining the standby power DC/DC unit from the plurality of DC/DC units according to the battery information.
Optionally, the control module 120 is further configured to:
determining a target DC/DC unit with the battery power larger than a preset power threshold from a plurality of DC/DC units;
And taking one or more DC/DC units with non-highest battery capacity in the target DC/DC unit as standby power DC/DC units.
Optionally, the control module 120 is further configured to:
Under the condition that the bus voltage is larger than a fifth voltage threshold and smaller than or equal to a sixth voltage threshold, stopping the reverse power supply of the standby power DC/DC unit in a reverse power supply state in a grading manner;
Under the condition that the bus voltage is larger than a sixth voltage threshold, stopping the reverse power supply of the standby power DC/DC unit in a reverse power supply state, and starting part or all of the non-standby power DC/DC units in a grading manner according to different starting strategies;
wherein the fifth voltage threshold is greater than the first voltage threshold and the sixth voltage threshold is greater than the fifth voltage threshold.
The apparatus 100 provided in the embodiment of the present application may perform each method in the foregoing method embodiment, and implement the functions and beneficial effects of each method in the foregoing method embodiment, which are not described herein.
Fig. 9 shows a schematic structural diagram of a control unit provided by an embodiment of the disclosure, where, as shown in fig. 9, at a hardware level, the electronic device includes at least one processor, and optionally, an internal bus, a network interface, and a memory. The Memory may include a Memory, such as a Random-Access Memory (RAM), and may further include a non-volatile Memory (non-volatile Memory), such as at least 1 disk Memory. Of course, the electronic device may also include hardware required for other services.
The processor, network interface, and memory may be interconnected by an internal bus, which may be an industry standard architecture (Industry Standard Architecture, ISA) bus, a peripheral component interconnect standard (PERIPHERAL COMPONENT INTERCONNECT, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be classified as address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in the figure, but not only one bus or one type of bus.
And a memory for storing the program. In particular, the program may comprise program code comprising at least one computer operating instruction. The memory may include memory and non-volatile storage and provide instructions and data to the processor.
At least one processor reads a corresponding computer program from the non-volatile memory into the memory and then runs to form a means of locating the target user at the logic level. At least one processor executing programs stored in the memory and specifically executing: the method disclosed in the embodiment of the first aspect of the present disclosure and implementing the functions and beneficial effects of each method described in the foregoing method embodiments are not described herein.
The method disclosed in the embodiment shown in the first aspect of the disclosure may be applied to at least one processor or implemented by at least one processor. The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in at least one processor. The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps and logic blocks of the disclosure in the embodiments of the disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present disclosure may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory, and the processor reads the information in the memory and, in combination with its hardware, performs the steps of the above method.
The electronic device may also execute the methods described in the foregoing method embodiments, and implement the functions and beneficial effects of the methods described in the foregoing method embodiments, which are not described herein.
Of course, other implementations, such as a logic device or a combination of hardware and software, are not excluded from the electronic device of the present disclosure, that is, the execution subject of the following processing flows is not limited to each logic unit, but may be hardware or a logic device.
The embodiments of the present disclosure further provide a computer readable storage medium storing one or more programs, which when executed by at least one processor, implement the methods disclosed in the embodiments of the present disclosure and implement the functions and advantages of the methods described in the foregoing method embodiments, which are not described herein again.
The computer readable storage medium includes Read-Only Memory (ROM), random access Memory (Random Access Memory RAM), magnetic disk or optical disk, etc.
Further, the disclosed embodiments also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, implement the following flow: the method disclosed in the embodiment of the present disclosure and implementing the functions and beneficial effects of each method described in the foregoing method embodiment are not described herein.
In summary, the foregoing description is only of the preferred embodiments of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
The system, module or unit set forth in the above embodiments may be implemented in particular by a computer chip or entity, or by a product having a certain function. One typical implementation is a computer. In particular, the computer may be, for example, a personal computer, a laptop computer, a cellular telephone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for system embodiments, since they are substantially similar to method embodiments, the description is relatively simple, as relevant to see a section of the description of method embodiments.
Claims (11)
1. A method for standby electric control, applied to a control unit in a power supply system of a power conversion cabinet, the power supply system of the power conversion cabinet comprises an AC/DC unit for connecting a mains supply and a plurality of DC/DC units for connecting batteries, the AC/DC unit, the DC/DC unit and the control unit are all connected to a direct current bus, the AC/DC unit and the DC/DC unit are both connected to the control unit, and the DC/DC unit comprises at least one standby DC/DC unit for reversely supplying power, the method comprises:
Monitoring the bus voltage of the direct current bus;
Under the condition that the bus voltage is smaller than a first voltage threshold, part or all of the non-standby DC/DC units are turned off in a grading manner according to different turn-off strategies, and/or part or all of the standby DC/DC units are controlled in a grading manner according to different reverse power supply strategies to reversely supply power;
Wherein the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
2. The method of claim 1, the step of turning off some or all of the non-standby dc\dc units according to different turn-off strategies, comprising:
Closing part of the non-standby DC/DC units under the condition that the bus voltage is smaller than a first voltage threshold and larger than or equal to a second voltage threshold; or alternatively
Closing all the non-standby DC/DC units under the condition that the bus voltage is smaller than the second voltage threshold;
Wherein the second voltage threshold is less than the first voltage threshold.
3. The method of claim 2, wherein the number of the standby DC/DC units is plural, and the step of controlling part or all of the standby DC/DC units to be powered in reverse according to different reverse power supply strategies includes:
controlling the first number of standby DC/DC units to reversely supply power under the condition that the bus voltage is smaller than the third voltage threshold and larger than or equal to a fourth voltage threshold; or alternatively
Controlling the second number of standby DC/DC units to supply power reversely under the condition that the bus voltage is smaller than the fourth voltage threshold;
Wherein a third voltage threshold is less than the first voltage threshold, the fourth voltage threshold is less than the third voltage threshold, and the second number is greater than the first number.
4. The method of claim 2, wherein the step of controlling the reverse power supply of some or all of the standby dc\dc units according to different reverse power supply strategies comprises:
controlling the standby DC/DC unit to supply power reversely according to a first reverse power supply parameter under the condition that the bus voltage is smaller than a third voltage threshold and larger than or equal to a fourth voltage threshold; or alternatively
Controlling the standby DC/DC unit to supply power reversely according to a second reverse power supply parameter under the condition that the bus voltage is smaller than the fourth voltage threshold;
the third voltage threshold is smaller than the first voltage threshold, the fourth voltage threshold is smaller than the third voltage threshold, and the discharge rate of the battery connected with the standby DC/DC unit when working at the second reverse power supply parameter is larger than the discharge rate of the battery connected with the standby DC/DC unit when working at the first reverse power supply parameter.
5. The method of claim 1, the method further comprising:
Acquiring battery information of batteries connected with each DC/DC unit;
and determining the standby power DC/DC unit from a plurality of DC/DC units according to the battery information.
6. The method of claim 5, the battery information comprising a battery charge, the determining the backup DC/DC unit from a plurality of DC/DC units based on the battery information comprising:
Determining a target DC/DC unit, wherein the electric quantity of the battery is larger than a preset electric quantity threshold, from a plurality of DC/DC units;
And taking one or more DC/DC units with non-highest battery power in the target DC/DC unit as the standby power DC/DC unit.
7. The method of any one of claims 1 to 6, further comprising:
Under the condition that the bus voltage is larger than a fifth voltage threshold and smaller than or equal to a sixth voltage threshold, stopping the reverse power supply of the standby power DC/DC unit in a reverse power supply state in a grading manner;
Stopping the reverse power supply of the standby power DC/DC unit in a reverse power supply state under the condition that the bus voltage is larger than a sixth voltage threshold value, and starting part or all of the non-standby power DC/DC units in a grading manner according to different starting strategies;
wherein a fifth voltage threshold is greater than the first voltage threshold, and the sixth voltage threshold is greater than the fifth voltage threshold.
8. An apparatus for standby electric control, applied to a control unit in a power supply system of a power conversion cabinet, the power supply system of the power conversion cabinet comprises an AC/DC unit for connecting with mains supply and a plurality of DC/DC units for connecting with batteries, the AC/DC unit, the DC/DC unit and the control unit are all connected to a direct current bus, the AC/DC unit and the DC/DC unit are both connected to the control unit, the DC/DC unit comprises at least one standby DC/DC unit for reversely supplying power, the apparatus comprises:
the monitoring module is used for monitoring the bus voltage of the direct current bus;
The control module is used for grading and closing part or all of the non-standby DC/DC units according to different closing strategies under the condition that the bus voltage is smaller than a first voltage threshold value, and/or grading and controlling part or all of the standby DC/DC units to be reversely powered according to different reverse power supply strategies;
Wherein the non-standby DC/DC unit is other DC/DC units except the standby DC/DC unit.
9. A power conversion cabinet power supply system comprising an AC/DC unit for connecting to a mains supply, a plurality of DC/DC units for connecting to a battery, and a control unit for executing the method of backup power control according to any one of claims 1 to 7, wherein the AC/DC unit, the DC/DC unit, and the control unit are all connected to a direct current bus, the AC/DC unit and the DC/DC unit are both connected to the control unit, and the DC/DC unit comprises at least one backup power DC/DC unit for reverse power supply.
10. The system of claim 9, each of the DC/DC units connecting one or more batteries, each of the DC/DC units comprising a charging DC/DC sub-unit through which the direct current bus charges the one or more batteries and a standby DC/DC sub-unit through which the one or more batteries reverse power the direct current bus.
11. A control unit comprising:
At least one processor; and
A memory arranged to store at least one computer executable instruction that when executed performs the method of standby control of any of claims 1-7 using the at least one processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410210777.4A CN118199240A (en) | 2024-02-26 | 2024-02-26 | Method and device for standby electric control, power supply system of battery changing cabinet and control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410210777.4A CN118199240A (en) | 2024-02-26 | 2024-02-26 | Method and device for standby electric control, power supply system of battery changing cabinet and control unit |
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| CN118199240A true CN118199240A (en) | 2024-06-14 |
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|---|---|---|---|
| CN202410210777.4A Pending CN118199240A (en) | 2024-02-26 | 2024-02-26 | Method and device for standby electric control, power supply system of battery changing cabinet and control unit |
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| Country | Link |
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| CN (1) | CN118199240A (en) |
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- 2024-02-26 CN CN202410210777.4A patent/CN118199240A/en active Pending
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