CN112510644A - Short-circuit protection method and device of UPS parallel operation system and UPS - Google Patents
Short-circuit protection method and device of UPS parallel operation system and UPS Download PDFInfo
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- CN112510644A CN112510644A CN202011281110.1A CN202011281110A CN112510644A CN 112510644 A CN112510644 A CN 112510644A CN 202011281110 A CN202011281110 A CN 202011281110A CN 112510644 A CN112510644 A CN 112510644A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention is suitable for the technical field of parallel operation systems, and discloses a short-circuit protection method and a short-circuit protection device for a UPS parallel operation system and a UPS, wherein the method is applied to any one UPS in the UPS parallel operation system, and comprises the following steps: when a load short circuit is detected, generating short circuit protection information, sending the short circuit protection information to other UPSs in the UPS parallel system, and performing short circuit protection according to the short circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously; and when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, carrying out short-circuit protection according to the short-circuit protection information. The invention can not generate the phenomenon of short-circuit protection in sequence, thereby preventing a certain UPS from bearing the current far exceeding the current limiting point of the UPS within a certain period of time, preventing the devices in the UPS from being damaged and achieving the purpose of protecting the devices in the UPS.
Description
Technical Field
The invention belongs to the technical field of parallel operation systems, and particularly relates to a short-circuit protection method and device of a UPS parallel operation system and a UPS.
Background
The UPS (Uninterruptible Power Supply) parallel system comprises at least two Uninterruptible Power supplies connected in parallel, and the output of each Uninterruptible Power Supply supplies Power for each load after being configured by a Power distribution cabinet.
The UPS parallel operation system is usually far away from a load, when the load is short-circuited, each uninterrupted power supply cannot detect the short circuit at the same time, so that each uninterrupted power supply performs short circuit protection successively, each uninterrupted power supply is in a bus follow current stage regardless of whether being in a short circuit protection state, and is inevitably in a non-current-sharing phenomenon.
Disclosure of Invention
In view of this, embodiments of the present invention provide a short-circuit protection method and apparatus for a parallel operation system of a UPS, and a UPS, so as to solve a problem in the prior art that when a short circuit occurs in a load connected to the parallel operation system of the UPS, a certain uninterruptible power supply may bear a current far exceeding a current limiting point of the certain uninterruptible power supply within a certain period of time, thereby damaging devices in the uninterruptible power supply.
The first aspect of the embodiment of the present invention provides a short-circuit protection method for a UPS parallel operation system, which is applied to any one UPS in the UPS parallel operation system, and the short-circuit protection method for the UPS parallel operation system includes:
when a load short circuit is detected, generating short circuit protection information, sending the short circuit protection information to other UPSs in the UPS parallel system, and performing short circuit protection according to the short circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, carrying out short-circuit protection according to the short-circuit protection information.
A second aspect of the embodiments of the present invention provides a short-circuit protection device for a UPS parallel system, which is applied to any one UPS in the UPS parallel system, and the short-circuit protection device for the UPS parallel system includes:
the information sending module is used for generating short-circuit protection information when detecting that the load is short-circuited, sending the short-circuit protection information to other UPSs in the UPS parallel operation system, and carrying out short-circuit protection according to the short-circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and the output closing module is used for performing short-circuit protection according to the short-circuit protection information when receiving the short-circuit protection information sent by other UPSs in the UPS parallel operation system.
A third aspect of the embodiments of the present invention provides a UPS, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the steps of the short-circuit protection method of the UPS parallel operation system according to the first aspect.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by one or more processors, implements the steps of the short-circuit protection method for a UPS parallel operation system according to the first aspect.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: when any UPS in the UPS parallel operation system detects a load short circuit, generating short circuit protection information, sending the short circuit protection information to other UPSs in the UPS parallel operation system, and performing short circuit protection according to the short circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously; when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, short-circuit protection is carried out according to the short-circuit protection information; the UPS of the parallel operation can simultaneously carry out short-circuit protection, and the phenomenon of carrying out short-circuit protection successively can not occur, so that the phenomenon that a certain UPS bears the current far exceeding the current limiting point of the UPS within a certain period of time can not occur, the damage of devices in the UPS can be prevented, and the purpose of protecting the devices in the UPS is achieved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart illustrating an implementation of a short-circuit protection method of a UPS parallel operation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a UPS parallel operation system according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a short-circuit protection device of a UPS parallel operation system according to an embodiment of the present invention;
fig. 4 is a schematic block diagram of a UPS provided in an embodiment of the invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a short-circuit protection method for a UPS parallel operation system according to an embodiment of the present invention, and for convenience of description, only a part related to the embodiment of the present invention is shown. The short-circuit protection method of the UPS parallel operation system is applied to any one UPS in the UPS parallel operation system, that is, the execution main body of the embodiment of the invention may be any one UPS in the UPS parallel operation system. As shown in fig. 1, the method may include the steps of:
s101: when a load short circuit is detected, generating short circuit protection information, sending the short circuit protection information to other UPSs in the UPS parallel system, and performing short circuit protection according to the short circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously.
Referring to fig. 2, the UPS parallel system may include at least two UPSs and a distribution cabinet connected in parallel, and an output of each UPS is connected to each load through the distribution cabinet to supply power to each load.
In the embodiment of the invention, when a certain UPS detects a load short circuit through the existing method, short-circuit protection information is generated and sent to other UPSs in the UPS parallel operation system, namely the UPSs except for the UPS as an execution main body, and meanwhile, the certain UPS performs short-circuit protection according to the short-circuit protection information. Wherein the short circuit protection may be turning off the output. The short-circuit protection information may instruct the UPSs to perform short-circuit protection simultaneously.
In one embodiment of the invention, the short-circuit protection information includes a time for simultaneous short-circuit protection;
the short-circuit protection information is used for indicating that each UPS in the UPS parallel operation system carries out short-circuit protection at the time of carrying out short-circuit protection simultaneously.
The short-circuit protection information may include a time when the respective UPSs perform short-circuit protection simultaneously. Each UPS may perform short-circuit protection at that time after receiving the short-circuit protection information.
Optionally, the short-circuit protection information may include a second preset time for performing short-circuit protection after the second preset time elapses. And after receiving the short-circuit protection information, the other UPSs perform short-circuit protection for a second preset time, and perform short-circuit protection for the UPS serving as the execution main body plus the communication time with the other UPSs and the second preset time. The communication time with the other UPS may be a time from sending the short-circuit protection information to receiving the short-circuit protection information by the other UPS. The second preset time can be set according to actual requirements.
In an embodiment of the present invention, the "sending short-circuit protection information to other UPSs in the UPS parallel system" in S101 may include:
and sending the short-circuit protection information to other UPSs in the UPS parallel operation system through a CAN (Controller Area Network) bus.
In the embodiment of the invention, the UPSs are connected in parallel through the CAN bus, so that the communication between the UPSs CAN be realized through the CAN bus.
S102: and when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, carrying out short-circuit protection according to the short-circuit protection information.
When other UPSs preferentially detect load short circuit, short circuit protection information is sent to the UPS as an execution main body, and after the UPS as the execution main body receives the short circuit protection information, short circuit protection is carried out according to the information.
As can be seen from the above description, the embodiment of the present invention can implement short-circuit protection for each parallel UPS at the same time, and does not have the phenomenon of performing short-circuit protection successively, so that a certain UPS does not bear a current far exceeding its current limiting point within a certain period of time, and devices in the UPS can be prevented from being damaged, thereby achieving the purpose of protecting the devices in the UPS.
In an embodiment of the present invention, the above S102 may include the following steps:
when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, whether the current of the UPS parallel operation system is larger than a preset current threshold value is detected;
and if the detected current is larger than the preset current threshold, performing short-circuit protection according to the short-circuit protection information.
If a certain UPS detects a load short circuit by mistake, parallel operation protection also occurs, which does not meet the target of the people. When a short circuit occurs, the current of each UPS is increased greatly, but the short circuit point may not be reached necessarily due to the non-uniform current. Therefore, when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, whether the current of the UPS is larger than a preset current threshold value is detected, if so, short-circuit protection is carried out according to the short-circuit protection information, and if not, short-circuit protection is not carried out, and whether the current of the UPS is larger than the preset current threshold value is continuously detected.
By the method, the problem of UPS short circuit false detection can be solved.
In an embodiment of the present invention, the "generating short-circuit protection information when a load short circuit is detected" in S101 above may include:
and when the load short circuit is detected and the time of the load short circuit lasts for a first preset time, generating short circuit protection information.
In the embodiment of the invention, when the time for continuously detecting the load short circuit is greater than or equal to the first preset time, the short circuit protection information is generated, and then the short circuit protection is carried out, so that the false detection can be prevented.
The first preset time can be set according to actual requirements. Alternatively, the first preset time may be 200 ms.
In one embodiment of the invention, the parallel output end of each UPS is connected with a load through a breaker, and the breakers correspond to the loads one by one;
the first preset time is greater than or equal to the on-off time of the circuit breaker.
Alternatively, referring to fig. 2, the distribution cabinet is connected to each load through each breaker. In particular, loads that are relatively far from the distribution cabinet must be equipped with corresponding circuit breakers.
The open time of a circuit breaker is the length of time that the circuit breaker detects an abnormality (e.g., a short circuit abnormality) until the circuit breaker is completely opened.
In the embodiment of the invention, the first preset time for the UPS to continuously detect the short circuit is greater than or equal to the on-off time of the breaker.
In one embodiment of the invention, the distance between any two UPSs in the UPS parallel operation system is not more than the preset distance.
In the embodiment of the invention, the UPS parallel operation system suggests close-range parallel operation, which is beneficial to the normal short-circuit protection of the parallel operation system and further prevents the damage of machine devices.
Corresponding to the short-circuit protection method of the UPS parallel operation system, an embodiment of the invention further provides a short-circuit protection device of the UPS parallel operation system, which has the same beneficial effects as the short-circuit protection method of the UPS parallel operation system. Fig. 3 is a schematic block diagram of a short-circuit protection device of a UPS parallel operation system according to an embodiment of the present invention, and for convenience of description, only a portion related to the embodiment of the present invention is shown. The short-circuit protection device of the UPS parallel operation system is applied to any UPS in the UPS parallel operation system.
In an embodiment of the present invention, the short-circuit protection device 30 of the UPS parallel operation system may include an information sending module 301 and an output shutdown module 302.
The information sending module 301 is configured to generate short-circuit protection information when a load short circuit is detected, send the short-circuit protection information to other UPSs in the UPS parallel system, and perform short-circuit protection according to the short-circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and the output shutdown module 302 is configured to perform short-circuit protection according to the short-circuit protection information when receiving the short-circuit protection information sent by other UPSs in the UPS parallel operation system.
In an embodiment of the present invention, the output shutdown module 302 may further be configured to:
when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, whether the current of the UPS parallel operation system is larger than a preset current threshold value is detected;
and if the detected current is larger than the preset current threshold, performing short-circuit protection according to the short-circuit protection information.
In an embodiment of the present invention, the information sending module 301 may further be configured to:
and when the load short circuit is detected and the time of the load short circuit lasts for a first preset time, generating short circuit protection information.
In one embodiment of the invention, the parallel output end of each UPS is connected with a load through a breaker, and the breakers correspond to the loads one by one;
the first preset time is greater than or equal to the on-off time of the circuit breaker.
In an embodiment of the present invention, the information sending module 301 may further be configured to:
and sending the short-circuit protection information to other UPSs in the UPS parallel operation system through the CAN bus.
In one embodiment of the invention, the short-circuit protection information includes a time for simultaneous short-circuit protection;
the short-circuit protection information is used for indicating that each UPS in the UPS parallel operation system carries out short-circuit protection at the time of carrying out short-circuit protection simultaneously.
In one embodiment of the invention, the distance between any two UPSs in the UPS parallel operation system is not more than the preset distance.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing functional units and modules are merely illustrated in terms of division, and in practical applications, the foregoing function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the short-circuit protection device of the UPS parallel operation system is divided into different functional units or modules to perform all or part of the above-described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the above-mentioned apparatus may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Fig. 4 is a schematic block diagram of a UPS provided in an embodiment of the invention. As shown in fig. 4, the UPS40 of this embodiment includes: one or more processors 401, a memory 402, and a computer program 403 stored in the memory 402 and executable on the processors 401. The processor 401, when executing the computer program 403, implements the steps in the above-described short-circuit protection method embodiments of the UPS parallel operation system, such as the steps S101 to S102 shown in fig. 1. Alternatively, the processor 401, when executing the computer program 403, implements the functions of the modules/units in the short-circuit protection device embodiment of the UPS parallel operation system, for example, the functions of the modules 301 to 302 shown in fig. 3.
Illustratively, the computer program 403 may be partitioned into one or more modules/units that are stored in the memory 402 and executed by the processor 401 to accomplish the present application. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of the computer program 403 in the UPS 40. For example, the computer program 403 may be divided into an information sending module and an output closing module, and the specific functions of each module are as follows:
the information sending module is used for generating short-circuit protection information when detecting that the load is short-circuited, sending the short-circuit protection information to other UPSs in the UPS parallel operation system, and carrying out short-circuit protection according to the short-circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and the output closing module is used for performing short-circuit protection according to the short-circuit protection information when receiving the short-circuit protection information sent by other UPSs in the UPS parallel operation system.
Other modules or units can refer to the description of the embodiment shown in fig. 3, and are not described again here.
The UPS40 includes, but is not limited to, a processor 401, a memory 402. Those skilled in the art will appreciate that fig. 4 is merely an example of a UPS40 and is not intended to limit the UPS40 and may include more or fewer components than shown, or some combination of components, or different components, for example, the UPS40 may also include input devices, output devices, network access devices, buses, etc.
The Processor 401 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 402 may be an internal storage unit of the UPS40, such as a hard disk or memory of the UPS 40. The memory 402 may also be an external storage device of the UPS40, such as a plug-in hard disk provided on the UPS40, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 402 may also include both internal storage units of the UPS40 and external storage devices. The memory 402 is used to store the computer programs 403 and other programs and data required by the UPS 40. The memory 402 may also be used to temporarily store data that has been output or is to be output.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the short-circuit protection apparatus and method of the UPS parallel operation system disclosed herein may be implemented in other manners. For example, the above-described short-circuit protection device embodiment of the UPS parallel system is merely illustrative, and for example, the division of the modules or units is only a logical functional division, and there may be another division in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A short-circuit protection method of a UPS parallel operation system is applied to any one UPS in the UPS parallel operation system, and comprises the following steps:
when a load short circuit is detected, generating short circuit protection information, sending the short circuit protection information to other UPSs in the UPS parallel system, and performing short circuit protection according to the short circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, carrying out short-circuit protection according to the short-circuit protection information.
2. The short-circuit protection method of the UPS parallel system according to claim 1, wherein when receiving short-circuit protection information sent by other UPSs in the UPS parallel system, performing short-circuit protection according to the short-circuit protection information includes:
when short-circuit protection information sent by other UPSs in the UPS parallel operation system is received, detecting whether the current of the UPS parallel operation system is larger than a preset current threshold value;
and if the detected current is larger than the preset current threshold, carrying out short-circuit protection according to the short-circuit protection information.
3. The short-circuit protection method of the UPS parallel operation system according to claim 1, wherein the generating short-circuit protection information when the load short circuit is detected comprises:
and when the load short circuit is detected and the time of the load short circuit lasts for a first preset time, generating short circuit protection information.
4. The short-circuit protection method of the UPS parallel operation system according to claim 3, wherein the parallel output end of each UPS is connected with the load through a breaker, and the breakers are in one-to-one correspondence with the loads;
the first preset time is greater than or equal to the on-off time of the circuit breaker.
5. The short-circuit protection method of the UPS parallel system according to claim 1, wherein the sending the short-circuit protection information to other UPSs in the UPS parallel system comprises:
and sending the short-circuit protection information to other UPSs in the UPS parallel operation system through a CAN bus.
6. The short-circuit protection method of the UPS parallel operation system according to claim 1, wherein the short-circuit protection information includes a time for which short-circuit protection is simultaneously performed;
and the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to perform short-circuit protection at the time of performing short-circuit protection simultaneously.
7. The short-circuit protection method of the UPS parallel operation system according to any one of claims 1 to 6, wherein the distance between any two UPSs in the UPS parallel operation system is not more than a preset distance.
8. The short-circuit protection device of the UPS parallel operation system is applied to any UPS in the UPS parallel operation system, and comprises the following components:
the information sending module is used for generating short-circuit protection information when a load short circuit is detected, sending the short-circuit protection information to other UPSs in the UPS parallel operation system, and carrying out short-circuit protection according to the short-circuit protection information; the short-circuit protection information is used for indicating each UPS in the UPS parallel operation system to carry out short-circuit protection simultaneously;
and the output closing module is used for carrying out short-circuit protection according to the short-circuit protection information when receiving the short-circuit protection information sent by other UPSs in the UPS parallel operation system.
9. A UPS comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of the short circuit protection method of the UPS parallel system according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by one or more processors, implements the steps of the short-circuit protection method of the UPS parallel system according to any one of claims 1 to 7.
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| CN114512955A (en) * | 2022-02-18 | 2022-05-17 | 深圳力锐斯电子有限公司 | Short-circuit protection method and device of UPS parallel operation system and UPS |
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| CN110649696A (en) * | 2018-06-26 | 2020-01-03 | Abb 瑞士股份有限公司 | Communication system and method in uninterruptible power supply system |
| CN111009878A (en) * | 2019-12-26 | 2020-04-14 | 上海派能能源科技股份有限公司 | Multi-output short-circuit protection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512955A (en) * | 2022-02-18 | 2022-05-17 | 深圳力锐斯电子有限公司 | Short-circuit protection method and device of UPS parallel operation system and UPS |
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