Control method of ups, controller of ups, ups, and storage medium

Abstract

The application provides a control method, a controller, a UPS and a storage medium. The UPS includes a target switch, the target switch includes a main contact and an auxiliary contact, the switch actions performed by the main contact and the auxiliary contact are the same, the switch stroke of the auxiliary contact is smaller than the switch stroke of the main contact, the target switch is arranged on at least one power supply line of the UPS, and the power supply line includes a mains power supply line, a battery power supply line and a bypass power supply line. The method includes: detecting whether the auxiliary contact of the target switch in the target power supply line sends an opening signal, the target power supply line is a power supply line provided with the target switch and in a working state; when the opening signal of the auxiliary contact of the target switch is detected, the current of the target power supply line is controlled to be reduced to a preset safety current value, so that the main contact of the target switch is opened at the preset safety current value. The application can improve the working reliability of the UPS.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of UPS control, and in particular to a UPS control method, a controller, a UPS and a storage medium. BACKGROUND

[0002] With the continuous development of science and technology, the application field of an uninterruptible power supply (UPS) is more and more extensive. The working reliability of the UPS is paid more and more attention.

[0003] The UPS has three power supply lines, namely, a mains power supply line, a battery power supply line and a bypass power supply line. Generally, the mains supplies power to a load through an AC / DC conversion module and a DC / AC conversion module. In the case of mains failure, the battery supplies power to the load through a DC / DC conversion module and a DC / AC conversion module. In the case of both mains and battery failure, the bypass can directly supply power to the load by closing a bypass switch, so as to ensure the power supply reliability of the load.

[0004] In the actual line switching process, most of them are hard switching, directly controlling the relay of the corresponding line to be disconnected. However, at this time, the current in the line is high, and direct disconnection may damage the service life of the relay and reduce the working reliability of the UPS. SUMMARY

[0005] The embodiments of the present application provide a UPS control method, a controller, a UPS and a storage medium, so as to solve the problem that the UPS directly cuts off the current during power supply line switching, which easily causes damage to the relay of the corresponding line.

[0006] In a first aspect, the embodiments of the present application provide a UPS control method, the UPS including a target switch, the target switch including a main contact and an auxiliary contact, the main contact and the auxiliary contact performing the same switching action, the switching stroke of the auxiliary contact being smaller than that of the main contact, the target switch being arranged on at least one power supply line of the UPS, the power supply line including a mains power supply line, a battery power supply line and a bypass power supply line;

[0007] The control method includes:

[0008] detecting whether the auxiliary contact of the target switch in the target power supply line sends a disconnection signal, the target power supply line being a power supply line provided with the target switch and in a working state;

[0009] when the disconnection signal of the auxiliary contact of the target switch is detected, controlling the current of the target power supply line to be reduced to a preset safe current value, so that the main contact of the target switch is disconnected at the preset safe current value.

[0010] In a possible implementation, the method for controlling the current of the target power supply circuit to decrease to the preset safe current value comprises:

[0011] In a preset time period, the current of the target power supply circuit is controlled to decrease to the preset safe current value according to a preset step length, wherein the preset time period is determined according to the switching stroke of the target switch main contact.

[0012] In a possible implementation, when the target power supply circuit is a bypass power supply circuit, the method for controlling the current of the target power supply circuit to decrease to the preset safe current value comprises:

[0013] The SCR drive on the bypass power supply circuit is controlled to be closed, so that the current of the bypass power supply circuit decreases to the preset safe current value.

[0014] In a possible implementation, when the target power supply circuit is a mains power supply circuit, before the current of the target power supply circuit is controlled to decrease to the preset safe current value, the method further comprises:

[0015] The battery power supply circuit is controlled to work.

[0016] In a possible implementation, when the target power supply circuit is a battery power supply circuit, the method for controlling the current of the target power supply circuit to decrease to the preset safe current value comprises:

[0017] The output current of the battery of the UPS is controlled to decrease to the preset safe current value.

[0018] In a possible implementation, when the target power supply circuit is a battery power supply circuit, before the current of the target power supply circuit is controlled to decrease to the preset safe current value, the method further comprises:

[0019] The mains power supply circuit is controlled to work.

[0020] In a second aspect, the embodiments of the present application provide a control device of a UPS, the UPS comprising a target switch, the target switch comprising a main contact and an auxiliary contact, the switching actions performed by the main contact and the auxiliary contact being the same, the switching stroke of the auxiliary contact being smaller than the switching stroke of the main contact, the target switch being arranged on at least one power supply circuit of the UPS, the power supply circuit comprising a mains power supply circuit, a battery power supply circuit and a bypass power supply circuit;

[0021] The control device comprises:

[0022] A judging module is configured to detect whether the auxiliary contact of the target switch in the target power supply circuit sends an open signal, the target power supply circuit being a power supply circuit provided with the target switch and in a working state;

[0023] A control module is configured to, when the open signal of the auxiliary contact of the target switch is detected, control the current of the target power supply circuit to decrease to a preset safe current value.

[0024] In a third aspect, an embodiment of the present application provides a controller, comprising a memory and a processor, the memory storing a computer program capable of running on the processor, and the processor implements the steps of the UPS control method according to the first aspect or any possible implementation manner of the first aspect when executing the computer program.

[0025] In a fourth aspect, an embodiment of the present application provides a UPS, comprising the controller according to the third aspect.

[0026] In a fifth aspect, an embodiment of the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the UPS control method according to the first aspect or any possible implementation manner of the first aspect when executed by a processor.

[0027] The present application provides a UPS control method, a controller, a UPS and a storage medium. The UPS can be provided with target switches, each of which comprises a main contact and an auxiliary contact, and the switching stroke of the auxiliary contact is generally smaller than that of the main contact. When the auxiliary contact of the target switch sends a disconnection signal, the present application controls the current of the corresponding power supply line to decrease to a preset safe current value, so as to ensure that the main contact of the target switch is disconnected at a lower preset safe current value, avoid large current disconnection, avoid damage to power devices, and improve the working reliability of the UPS. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 FIG. 1 is a structural schematic diagram of a UPS provided by an embodiment of the present application;

[0030] Figure 2 FIG. 2 is an implementation flowchart of a UPS control method provided by an embodiment of the present application;

[0031] Figure 3 FIG. 3 is a structural schematic diagram of a UPS control device provided by an embodiment of the present application;

[0032] Figure 4 FIG. 4 is a schematic diagram of a controller provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, circuits, and

[0034] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in detail through specific embodiments in conjunction with the accompanying drawings.

[0035] Figure 1 is a structural schematic diagram of the UPS provided by the embodiments of the present application, as shown in the figure, in the embodiments of the present application, the target switch can be arranged on any power supply line of the UPS. Among them, the target switch can be arranged on the power supply line with lower current of the UPS, and the specific arrangement can be made according to the actual situation. Figure 1

[0036] The UPS can include the following three power supply lines, and the target switch can be arranged at the following positions of the power supply lines. Each power supply line can be arranged with a target switch, or can not be arranged with a target switch, and the specific arrangement can be selected according to the actual situation.

[0037] The power supply line of the commercial power supply: the first commercial power supply → the target switch → AC / DC → DC / AC → the target switch → the load.

[0038] The power supply line of the battery supply: the battery → the target switch → DC / DC → DC / AC → the target switch → the load.

[0039] The power supply line of the bypass supply: the second commercial power supply → the target switch → SCR → the target switch → the load.

[0040] Generally, the power supply priority of the power supply line of the commercial power supply is the highest, the power supply priority of the power supply line of the battery supply is the second, and the power supply priority of the power supply line of the bypass supply is the lowest.

[0041] In the embodiments of the present application, the UPS includes a target switch, the target switch includes a main contact and an auxiliary contact, the switch actions performed by the main contact and the auxiliary contact are the same, the switch stroke of the auxiliary contact is smaller than the switch stroke of the main contact, and the target switch is arranged on at least one power supply line of the UPS. The power supply line includes the power supply line of the commercial power supply, the power supply line of the battery supply and the power supply line of the bypass supply.

[0042] ​In the embodiments of the present application, when the target switch receives a disconnection signal, the main contact and the auxiliary contact of the target switch both perform a disconnection action. When the target switch receives a connection signal, the main contact and the auxiliary contact of the target switch both perform a connection action. Wherein, the auxiliary contact performs the disconnection action in a time less than that of the main contact, and the auxiliary contact performs the connection action in a time less than that of the main contact.

[0043] Referring to Figure 2 , a flowchart of an implementation of a control method of a UPS provided by the embodiments of the present application is shown. As Figure 2 indicated, a control method of a UPS can include S101 and S102.

[0044] S101, detecting whether the auxiliary contact of the target switch in the target power supply circuit sends a disconnection signal, the target power supply circuit being a power supply circuit provided with the target switch and in a working state.

[0045] When the auxiliary contact of the target switch is disconnected, a disconnection signal can be sent externally.

[0046] Optionally, the target switch can be arranged on a mains power supply circuit, a battery power supply circuit and / or a bypass power supply circuit.

[0047] Under normal circumstances, the mains power supply circuit is preferentially in a working state and supplies power to the load. When the mains is abnormal, the power supply circuit needs to be switched, from the mains power supply circuit to the battery power supply circuit. At this time, the target power supply circuit is the mains power supply circuit, and after sending a disconnection signal to the mains power supply circuit, it can be detected whether the auxiliary contact of the target switch on the mains power supply circuit sends a disconnection signal.

[0048] When both the mains and the battery are abnormal, the battery power supply circuit needs to be switched to the bypass power supply circuit, at this time, the target power supply circuit is the battery power supply circuit, and after sending a disconnection signal to the battery power supply circuit, it can be detected whether the auxiliary contact of the target switch on the battery power supply circuit sends a disconnection signal.

[0049] When the mains returns to normal, the bypass power supply circuit needs to be switched to the mains power supply circuit, at this time, the target power supply circuit is the bypass power supply circuit, and after sending a disconnection signal to the bypass power supply circuit, it can be detected whether the auxiliary contact of the target switch on the bypass power supply circuit sends a disconnection signal.

[0050] S102, when the disconnection signal of the auxiliary contact of the target switch is detected, controlling the current of the target power supply circuit to decrease to a preset safe current value, so that the main contact of the target switch is disconnected at the preset safe current value.

[0051] Since the switching stroke of the main contact and the auxiliary contact of the target switch is different, after the target switch receives the opening signal, the auxiliary contact of the target switch opens first, and after a certain time, the main contact of the target switch opens.

[0052] Therefore, when the opening signal of the auxiliary contact of the target switch is detected, the current on the target power supply line where the target switch is located can be controlled to decrease to a preset safe current value, so that when the main contact of the target switch opens, the current on the target power supply line is small, small-current opening is realized, and damage to the target switch is avoided.

[0053] The preset safe current value can be set according to actual conditions, for example, the preset safe current value can be 0A or 1 / 10 of the rated current value of the target switch.

[0054] In the embodiments of the present application, there is an action gap of about 10ms between the auxiliary contact and the main contact of the target switch, which is sufficient to control the decrease of the current on the target power supply line.

[0055] The embodiments of the present application control the current of the corresponding power supply line to decrease to a preset safe current value when the opening signal of the auxiliary contact of the target switch is detected, so as to ensure that the main contact of the target switch opens at a low preset safe current value, avoid large-current opening, avoid damage to the power device, and improve the working reliability of the UPS.

[0056] In some embodiments of the present application, controlling the current of the target power supply line to decrease to a preset safe current value comprises:

[0057] In a preset time length, the current of the target power supply line is controlled to decrease to a preset safe current value according to a preset step length, wherein the preset time length is determined according to the switching stroke of the main contact of the target switch.

[0058] In the embodiments of the present application, the preset time length can be any time length less than or equal to the switching stroke of the main contact of the target switch, which can be set according to actual conditions.

[0059] After the opening signal of the auxiliary contact of the target switch in the target power supply line is detected, the current of the target power supply line can be controlled to gradually decrease according to a preset step length in a preset time length until the preset safe current value, so that the main contact of the target switch opens at the preset safe current value.

[0060] For example, when the target power supply line is a mains power supply line: if the opening signal of the auxiliary contact of the target switch on the mains power supply line is detected, the current of the mains power supply line is controlled to decrease to a preset safe current value according to a preset step length, so that the main contact of the target switch on the mains power supply line opens at the preset safe current value, and damage to the power device is avoided.

[0061] The embodiments of the present application can gradually and continuously reduce the current on the target power supply circuit, so that the current changes more gently, avoid large current fluctuations, and ensure the working reliability of the UPS.

[0062] In some embodiments of the present application, when the target power supply circuit is a bypass power supply circuit, the method of controlling the current of the target power supply circuit to decrease to a preset safe current value comprises:

[0063] controlling the SCR drive on the bypass power supply circuit to be closed, so that the current of the bypass power supply circuit decreases to the preset safe current value.

[0064] The embodiments of the present application can reduce the current of the bypass power supply circuit by closing the SCR drive.

[0065] In some embodiments of the present application, when the target power supply circuit is a mains power supply circuit, before controlling the current of the target power supply circuit to decrease to a preset safe current value, the control method further comprises:

[0066] controlling the battery power supply circuit to work.

[0067] When the mains power supply circuit is abnormal and the battery power supply circuit is normal, the mains power supply circuit needs to be switched to the battery power supply circuit. At this time, in order to reduce the switching current of the mains power supply circuit and ensure the smooth transition of the UPS, the battery power supply circuit can be controlled to work in advance to reduce the probability of damage when the target switch on the mains power supply circuit is turned off, and improve the service life of the device.

[0068] In some embodiments of the present application, when the target power supply circuit is a battery power supply circuit, the method of controlling the current of the target power supply circuit to decrease to a preset safe current value comprises:

[0069] controlling the output current of the battery of the UPS to decrease to a preset safe current value.

[0070] When the target power supply circuit is a battery power supply circuit, the embodiments of the present application can control the output current of the battery of the UPS to decrease, and then realize the decrease of the current of the battery power supply circuit to a preset safe current value, so that the main contact of the target switch on the battery power supply circuit is turned off at a preset safe current value, avoiding damage and improving the service life of the device.

[0071] In some embodiments of the present application, when the target power supply circuit is a battery power supply circuit, before controlling the current of the target power supply circuit to decrease to a preset safe current value, the control method further comprises:

[0072] controlling the mains power supply circuit to work.

[0073] After the mains power supply line is restored to normal, the battery power supply line needs to be switched to the mains power supply line to supply power to the load. At this time, in order to reduce the switching current of the battery power supply line and ensure smooth transition of the UPS, the mains power supply line can be controlled in advance to reduce the probability of damage when the target switch is turned off, thereby prolonging the service life of the device.

[0074] The target switch is arranged in the embodiment of the application, the pre-reduction of the current in the target power supply line is realized by detecting the opening signal of the auxiliary contact of the target switch, the cost and the service life of the device can be reduced, and the working reliability of the UPS is greatly improved.

[0075] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, and the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the application.

[0076] The following is a device embodiment of the application. For details not described in detail, please refer to the corresponding method embodiments described above.

[0077] Figure 3 The structure of the control device of the UPS provided by the embodiment of the application is shown. For the convenience of description, only the part related to the embodiment of the application is shown, and the details are as follows:

[0078] The UPS includes a target switch, the target switch includes a main contact and an auxiliary contact, the main contact and the auxiliary contact perform the same switching action, the switching stroke of the auxiliary contact is smaller than that of the main contact, and the target switch is arranged on at least one power supply line of the UPS. The power supply line includes a mains power supply line, a battery power supply line and a bypass power supply line.

[0079] As Figure 3 shown, the control device 20 of the UPS can include:

[0080] The judgment module 201 is configured to detect whether the auxiliary contact of the target switch in the target power supply line sends an opening signal, and the target power supply line is a power supply line provided with the target switch and in a working state;

[0081] The control module 202 is configured to control the current of the target power supply line to reduce to a preset safe current value when the opening signal of the auxiliary contact of the target switch is detected.

[0082] In some embodiments of the application, the control module 202 is further configured to control the current of the target power supply line to reduce to the preset safe current value according to a preset step length within a preset time length, and the preset time length is determined according to the switching stroke of the main contact of the target switch.

[0083] In some embodiments of the present application, the control module 202 is further configured to control the SCR drive on the bypass power supply line to be closed so as to reduce the current of the bypass power supply line to the preset safe current value when the target power supply line is the bypass power supply line.

[0084] In some embodiments of the present application, the control device 20 can further include:

[0085] The first switch control module is configured to control the battery power supply line to work before the current of the target power supply line is reduced to the preset safe current value when the target power supply line is the mains power supply line.

[0086] In some embodiments of the present application, the control module 202 is further configured to control the output current of the battery of the UPS to be reduced to the preset safe current value when the target power supply line is the battery power supply line.

[0087] In some embodiments of the present application, the control device 20 can further include:

[0088] The second switch control module is configured to control the mains power supply line to work before the current of the target power supply line is reduced to the preset safe current value when the target power supply line is the battery power supply line.

[0089] Figure 4 is a schematic diagram of a controller provided by an embodiment of the present application. As shown in Figure 4 The controller 30 of this embodiment includes a processor 300 and a memory 301, and the memory 301 stores a computer program 302 that can run on the processor 300. The processor 300 implements the steps in each of the above-mentioned control method embodiments of the UPS when executing the computer program 302. Alternatively, the processor 300 implements the functions of each module / unit in each of the above-mentioned device embodiments when executing the computer program 302.

[0090] For example, the computer program 302 can be divided into one or more modules / units, which are stored in the memory 301 and executed by the processor 300 to complete the present application. One or more modules / units can be a series of computer program instruction segments capable of completing a specific function, which are used to describe the execution process of the computer program 302 in the controller 30.

[0091] The controller 30 can include, but is not limited to, the processor 300 and the memory 301. Those skilled in the art can understand, Figure 4 is merely an example of the controller 30 and does not limit the controller 30, which can include more or fewer components than those shown, or combine certain components, or different components, for example, the controller can also include an input / output device, a network access device, a bus, etc.

[0092] The processor 300 can be a central processing unit (CPU), and can also be other general-purpose processors, 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, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0093] The memory 301 can be an internal storage unit of the controller 30, for example, a hard disk or a memory of the controller 30. The memory 301 can also be an external storage device of the controller 30, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 301 can include both the internal storage unit and the external storage device of the controller 30. The memory 301 is used to store computer programs and other programs and data required by the controller. The memory 301 can also be used to temporarily store data that has been output or will be output.

[0094] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is exemplified, and in actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the above described functions. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0095] The embodiments of the present application also provide a UPS, which comprises the controller 30 as above.

[0096] In the above embodiments, the description of each embodiment has its own focus, and the parts not described or recorded in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0097] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. A person 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 the present application.

[0098] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / controller and method can be implemented in other ways. For example, the apparatus / controller embodiments described above are merely schematic, for example, the division of modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0099] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0100] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software functional unit.

[0101] The integrated modules / units, if implemented in the form of software functional units and sold or used as independent products, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiments can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of the control method embodiments of the above-mentioned UPSs can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0102] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A control method of a UPS, characterized by, The UPS comprises a target switch, the target switch comprises a main contact and an auxiliary contact, the main contact and the auxiliary contact perform the same switching action, the switching stroke of the auxiliary contact is smaller than the switching stroke of the main contact, the target switch is arranged on at least one power supply line of the UPS, and the power supply line comprises a mains power supply line, a battery power supply line and a bypass power supply line; The control method comprises: detecting whether the auxiliary contact of the target switch in the target power supply line sends an opening signal, the target power supply line being a power supply line provided with the target switch and in a working state; when detecting the opening signal of the auxiliary contact of the target switch, controlling the current of the target power supply line to decrease to a preset safe current value, so that the main contact of the target switch is opened at the preset safe current value; controlling the current of the target power supply line to decrease to a preset safe current value, comprising: controlling the current of the target power supply line to decrease to the preset safe current value according to a preset step length within a preset time length, wherein the preset time length is determined according to the switching stroke of the main contact of the target switch; when the target power supply line is a bypass power supply line, controlling the SCR drive on the bypass power supply line to be closed, so that the current of the bypass power supply line decreases to the preset safe current value; when the target power supply line is a battery power supply line, controlling the output current of the battery of the UPS to decrease to the preset safe current value.

2. The control method of the UPS according to claim 1, characterized by, When the target power supply line is a mains power supply line, before controlling the current of the target power supply line to decrease to a preset safe current value, the control method further comprises: controlling the battery power supply line to work.

3. The control method of the UPS according to claim 1, characterized by, When the target power supply line is a battery power supply line, before controlling the current of the target power supply line to decrease to a preset safe current value, the control method further comprises: controlling the mains power supply line to work.

4. A control device of a UPS, characterized by comprising: The UPS comprises a target switch, the target switch comprises a main contact and an auxiliary contact, the main contact and the auxiliary contact perform the same switching action, the switching stroke of the auxiliary contact is smaller than the switching stroke of the main contact, the target switch is arranged on at least one power supply line of the UPS, and the power supply line comprises a mains power supply line, a battery power supply line and a bypass power supply line; The control device comprises: a judging module configured to detect whether the auxiliary contact of the target switch in the target power supply line sends an opening signal, the target power supply line being a power supply line provided with the target switch and in a working state; The control module is configured to, when detecting the disconnection signal of the auxiliary contact of the target switch, control the current of the target power supply circuit to decrease to a preset safe current value, so that the main contact of the target switch is disconnected at the preset safe current value; the control of the current of the target power supply circuit to decrease to the preset safe current value comprises: controlling the current of the target power supply circuit to decrease to the preset safe current value according to a preset step length within a preset time length, wherein the preset time length is determined according to the switching stroke of the main contact of the target switch; when the target power supply circuit is a bypass power supply circuit, controlling the SCR drive on the bypass power supply circuit to be closed, so that the current of the bypass power supply circuit decreases to the preset safe current value; when the target power supply circuit is a battery power supply circuit, controlling the output current of the battery of the UPS to decrease to the preset safe current value.

5. A controller comprising a memory and a processor, the memory having stored therein a computer program executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the control method of the UPS according to any one of claims 1 to 3.

6. A UPS characterized by, The controller according to claim 5.

7. A computer-readable storage medium storing a computer program, wherein the computer program comprises the following steps of: receiving a request for a resource from a client; determining whether the client is authorized to access the resource; and if the client is authorized to access the resource, providing the resource to the client. The computer program is executed by the processor to implement the steps of the control method of the UPS according to any one of claims 1 to 3. The computer program is executed by the processor to implement the steps of the control method of the UPS according to any one of claims 1 to 3.

Images