CN110854992A - UPS control method and device and UPS - Google Patents
UPS control method and device and UPS Download PDFInfo
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- 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 uninterrupted power supplies, and provides a control method and a control device of a UPS (uninterrupted power supply) and the UPS. The input end of the rectification module of the UPS is connected with a power grid, and the bypass of the UPS is communicated, so that the output of the inversion module of the UPS feeds energy back to the power grid through the communicated bypass; the control method comprises the following steps: acquiring an inversion carrier signal of an inversion module; and synchronously adjusting the initial carrier signal of the rectification module based on the inversion carrier signal to obtain a rectification carrier signal, wherein the inversion carrier signal represents the carrier signal actually controlling the inversion module, and the rectification carrier signal represents the carrier signal actually controlling the rectification module. The invention can improve the safety when carrying out high-temperature aging test on the basis of saving cost and space.
Description
Technical Field
The invention belongs to the technical field of uninterruptible power supplies, and particularly relates to a control method and a control device of a UPS, the UPS and a computer readable storage medium.
Background
The high-temperature aging test is an essential key link in the production process of an Uninterruptible Power Supply (UPS), for example, in the continuous 48-hour full-load operation process of the UPS at 40 ℃ environmental temperature, the assembly error of the system and the device defects can be exposed in advance, thereby being beneficial to ensuring the factory quality of UPS products.
The UPS usually needs to provide an LC filter circuit on the grid input side to filter out high frequency interference in the grid. In consideration of cost and space, the input side filter circuit can remove the inductor L in the LC filter circuit, however, when the UPS is self-aged, the static switch of the bypass of the UPS is conducted, and inversion grid connection is realized. If the inductance L in the LC filter circuit is removed, the main input and the bypass input are homologous at the moment, and the inverter output is directly connected with the rectifier input. When filtering is input, high-frequency current with large amplitude can appear on the filter capacitor C, so that the filter capacitor C is easily burnt, and the system safety is influenced.
Disclosure of Invention
In view of this, the present invention provides a control method and a control apparatus for a UPS, and a UPS, so as to solve the problem that in the prior art, if an inductor L in an LC filter circuit is removed during a self-aging test of the UPS, a filter capacitor C is easily burned out, which affects system safety.
A first aspect of an embodiment of the present invention provides a control method for a UPS, where an input end of a rectification module of the UPS is connected to a power grid, and a bypass of the UPS is connected, so that an output of an inverter module of the UPS feeds back energy to the power grid through the connected bypass;
the control method comprises the following steps:
acquiring an inversion carrier signal of the inversion module;
and based on the inversion carrier signal, synchronously adjusting the initial carrier signal of the rectification module to obtain a rectification carrier signal, wherein the inversion carrier signal represents a carrier signal actually controlling the inversion module, and the rectification carrier signal represents a carrier signal actually controlling the rectification module.
Based on the first aspect, in a first possible implementation manner, the performing synchronous adjustment on the initial carrier signal of the rectification module based on the inverted carrier signal to obtain a rectified carrier signal includes:
and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
Based on the first aspect and the first possible implementation manner of the first aspect, in a second possible implementation manner, before the obtaining the inverted carrier signal of the inverting module, the method further includes:
and acquiring a synchronous signal, and synchronously adjusting the initial carrier signal of the inversion module based on the synchronous signal to obtain an inversion carrier signal.
Based on the second possible implementation manner, in a third possible implementation manner, the UPS is a slave in a parallel operation system, and the acquiring the synchronization signal includes:
and acquiring a synchronous signal output by a host in the parallel operation system.
Based on the third possible implementation manner, in a fourth possible implementation manner, the UPS is a host in a parallel operation system, and the acquiring the synchronization signal includes:
the method comprises the steps of obtaining an initial carrier signal of an inversion module of a host, and using the initial carrier signal as a synchronous signal.
Based on the fourth possible implementation manner, in a fifth possible implementation manner, after the acquiring an initial carrier signal of an inversion module of the host itself and taking the initial carrier signal as a synchronization signal, the method includes:
and outputting the synchronous signal to enable the slave of the parallel machine system to carry out carrier synchronization based on the synchronous signal.
A second aspect of the embodiments of the present invention provides a control apparatus for a UPS, where an input end of a rectification module of the UPS is connected to a power grid, and a bypass of the UPS is connected, so that an output of an inverter module of the UPS feeds back energy to the power grid through the connected bypass;
the control device includes:
the first acquisition unit is used for acquiring an inversion carrier signal of the inversion module;
and the rectification synchronization unit is used for synchronously adjusting the initial carrier signal of the rectification module based on the inversion carrier signal to obtain a rectification carrier signal, wherein the inversion carrier signal represents the carrier signal actually controlling the inversion module, and the rectification carrier signal represents the carrier signal actually controlling the rectification module.
Based on the second aspect, in a first possible implementation manner, the rectification synchronization unit is specifically configured to:
and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
A third aspect of 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, the processor implementing the steps of the control method of the UPS as in any one of the above when executing the computer program.
A fourth aspect of embodiments of the present invention provides a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the control method of the UPS according to any one of the above.
Compared with the prior art, the invention has the following beneficial effects:
on one hand, when the UPS is subjected to high-temperature aging test, the bypass of the UPS is connected, so that the output of the inverter module of the UPS feeds back energy to the power grid through the connected bypass, and energy and enterprise cost can be saved; on the other hand, a filter inductor can be removed between the rectifier module of the UPS and the power grid input, so that the cost and the space are saved; in the third aspect, the generation of high-frequency current is inhibited by controlling the carrier synchronization of the rectification module and the inversion module of the UPS, so that not only is the filter capacitor protected, but also the high-frequency component of energy fed back to the power grid by the UPS bypass is reduced.
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 diagram of a connection topology for a UPS performing burn-in testing according to an embodiment of the present invention;
fig. 2 is a flowchart of an implementation of a control method for a UPS according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control apparatus of a UPS according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a UPS provided by 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 invention. It will be apparent, however, to one skilled in the art that the present invention 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 invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made by way of specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, a schematic diagram of a connection topology for performing a burn-in test of a UPS according to an embodiment of the present invention is shown, which is detailed as follows:
as shown in fig. 1, the UPS1 includes a rectifier module 11, an inverter module 12, and a bypass 13, wherein an input of the rectifier module 11 is connected to the grid, and the bypass 13 is connected such that an output of the inverter module 12 of the UPS feeds energy back to the grid through the connected bypass 13. Because the aging test needs to be carried out at full load, a large amount of power grid energy can be consumed, the high-temperature aging test of the UPS is carried out by utilizing the connection topology, and energy is fed back to the power grid through the bypass, so that the test cost of an enterprise can be saved.
In this embodiment, the rectifier module and the inverter module of the UPS may adopt a back-to-back structure, that is, the rectifier module and the inverter module adopt the same circuit structure. The control method of the UPS is used for realizing the carrier synchronization of the rectification module and the inversion module, so that the filter capacitor at the input end of the UPS is overlapped with the filter capacitor at the output end at the voltage rising stage at the voltage falling stage, and the filter capacitor at the input end is overlapped with the filter capacitor at the output end at the voltage falling stage at the voltage rising stage. When self-aging test is carried out under the structure (bypass is connected, the output of the inverter module is fed back to the power grid), voltage fluctuation can be mutually offset, and the effect of reducing high-frequency ripples can be achieved. Therefore, no filter inductor is arranged between the rectifier module 11 and the power grid input, testing devices are reduced, and testing cost and testing space are saved.
Referring to fig. 2, it shows a flowchart of an implementation of the UPS control method provided in the embodiment of the present invention, which is detailed as follows:
in step 201, acquiring an inversion carrier signal of the inversion module;
in the embodiment of the invention, the rectification module of the UPS can acquire the inversion carrier signal of the inversion module to synchronously adjust the initial carrier signal of the rectification module based on the inversion carrier signal, so as to realize carrier synchronization between the rectification carrier signal of the rectification module and the inversion carrier signal of the inversion module.
When the UPS is a single UPS operating in a stand-alone mode, the inverted carrier signal may be an initial carrier signal of its own inversion module. When the UPS is one UPS in the parallel operation system, if the UPS is the host, the inversion carrier signal can be an initial carrier signal of the inversion module of the UPS; if the signal is an extension, the inverted carrier signal may be a carrier signal obtained by performing synchronization adjustment on the initial carrier signal of the own inversion module based on the acquired synchronization signal output by the host. In the embodiment of the present invention, the carrier signal may be a multi-Pulse Width Modulation (PWM) wave.
Optionally, before the obtaining the inverted carrier signal of the inverting module, the method further includes:
and acquiring a synchronous signal, and synchronously adjusting the initial carrier signal of the inversion module based on the synchronous signal to obtain an inversion carrier signal.
In the embodiment of the invention, the inversion carrier signal can be a carrier signal initially generated by the inversion module, and in the application scenario, carrier synchronization between the inversion module and the rectification module in the same UPS can be realized.
In the embodiment of the present invention, the inverted carrier signal may also be a carrier signal obtained by obtaining a synchronization signal output by a host in the parallel operation system and synchronously adjusting an initial carrier signal of an inversion module of the parallel operation system based on the synchronization signal, and in this application scenario, carrier synchronization between inversion modules of different UPSs constituting the UPS parallel operation system that are in communication connection with each other may be implemented.
Optionally, the UPS is a slave in a parallel operation system, and acquiring the synchronization signal includes:
and acquiring a synchronous signal output by a host in the parallel operation system.
In an embodiment of the present invention, the plurality of UPSs may constitute a parallel system, and the synchronization signal may be a signal output by a UPS serving as a master in the parallel system. The slave UPS in the parallel operation system can receive the synchronous signal output by the host, and synchronously adjusts the initial carrier signal of the inversion module of the parallel operation system based on the synchronous signal to obtain the inversion carrier signal.
Optionally, the UPS is a host in a parallel operation system, and acquiring the synchronization signal includes:
the method comprises the steps of obtaining an initial carrier signal of an inversion module of a host, and using the initial carrier signal as a synchronous signal.
In the embodiment of the present invention, for the master UPS in the parallel operation system, the initial carrier signal of the inverter module of the master UPS may be output as the synchronization signal, so that the slave UPS in the parallel operation system realizes carrier synchronization between the UPSs and carrier synchronization between the inverter module and the rectifier module in the same UPS based on the synchronization signal.
Optionally, after acquiring the initial carrier signal of the inversion module of the host itself and taking the initial carrier signal as the synchronization signal, the method includes:
and outputting the synchronous signal to enable the slave of the parallel machine system to carry out carrier synchronization based on the synchronous signal.
In step 202, based on the inverted carrier signal, an initial carrier signal of the rectification module is synchronously adjusted to obtain a rectified carrier signal, where the inverted carrier signal represents a carrier signal actually controlling the inversion module, and the rectified carrier signal represents a carrier signal actually controlling the rectification module.
In the embodiment of the invention, for each UPS, the carrier synchronization of the rectification module and the inversion module of the same UPS can be realized by acquiring the inversion carrier signal of the inversion module and synchronously adjusting the initial carrier signal of the rectification module based on the inversion carrier signal, so that the generation of high-frequency current can be inhibited, the protection of a filter capacitor can be realized, and the high-frequency component of energy fed back to a power grid by a bypass of the UPS can be reduced.
Optionally, in step 202, the step of synchronously adjusting the initial carrier signal of the rectification module based on the inverted carrier signal to obtain a rectified carrier signal includes:
and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
In the embodiment of the invention, the rectification carrier signal synchronous with the inversion carrier signal can be obtained by adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal of the inversion module, so that the carrier synchronization between the rectification module and the inversion module is realized.
In one aspect, the bypass of the UPS is connected when the UPS is subjected to the high-temperature aging test, so that the output of the inverter module of the UPS feeds back energy to the power grid through the connected bypass, and energy and enterprise cost can be saved; on the other hand, a filter inductor can be removed between the rectifier module of the UPS and the power grid input, so that the cost and the space are saved; in the third aspect, the generation of high-frequency current is inhibited by controlling the carrier synchronization of the rectification module and the inversion module of the UPS, so that not only is the filter capacitor protected, but also the high-frequency component of energy fed back to the power grid by the UPS bypass is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The following are embodiments of the apparatus of the invention, reference being made to the corresponding method embodiments described above for details which are not described in detail therein.
Fig. 3 is a schematic structural diagram of a control apparatus of a UPS according to an embodiment of the present invention, and for convenience of description, only the portions related to the embodiment of the present invention are shown, and detailed descriptions are as follows:
the input end of the rectification module of the UPS is connected with a power grid, and the bypass of the UPS is communicated, so that the output of the inversion module of the UPS feeds energy back to the power grid through the communicated bypass.
As shown in fig. 3, the control device 3 of the UPS includes: a first acquisition unit 31 and a rectification synchronization unit 32.
A first obtaining unit 31, configured to obtain an inverted carrier signal of the inverting module;
and the rectification synchronization unit 32 is configured to perform synchronization adjustment on the initial carrier signal of the rectification module based on the inversion carrier signal to obtain a rectification carrier signal, where the inversion carrier signal represents a carrier signal actually controlling the inversion module, and the rectification carrier signal represents a carrier signal actually controlling the rectification module.
Optionally, the rectification synchronization unit 32 is specifically configured to: and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
Optionally, the control apparatus 3 of the UPS further includes:
a second obtaining unit, configured to obtain a synchronization signal before obtaining the inverted carrier signal of the inverting module;
and the inversion synchronization unit is used for synchronously adjusting the initial carrier signal of the inversion module based on the synchronous signal to obtain an inversion carrier signal.
Optionally, the UPS is a slave in the parallel operation system, and the second obtaining unit is specifically configured to obtain a synchronization signal output by a master in the parallel operation system.
Optionally, the UPS is a host in a parallel operation system, and the second obtaining unit is specifically configured to obtain an initial carrier signal of an inverter module of the host, and use the initial carrier signal as a synchronization signal.
Optionally, if the UPS is a host in a parallel operation system, the control device 3 of the UPS further includes:
and the output unit is used for outputting the synchronous signal so as to enable the slave of the parallel machine system to carry out carrier synchronization based on the synchronous signal.
In one aspect, the bypass of the UPS is connected when the UPS is subjected to the high-temperature aging test, so that the output of the inverter module of the UPS feeds back energy to the power grid through the connected bypass, and energy and enterprise cost can be saved; on the other hand, a filter inductor can be removed between the rectifier module of the UPS and the power grid input, so that the cost and the space are saved; in the third aspect, the generation of high-frequency current is inhibited by controlling the carrier synchronization of the rectification module and the inversion module of the UPS, so that not only is the filter capacitor protected, but also the high-frequency component of energy fed back to the power grid by the UPS bypass is reduced.
Fig. 4 is a schematic diagram of a UPS according to an embodiment of the present invention. As shown in fig. 4, the UPS4 of this embodiment includes: a processor 40, a memory 41 and a computer program 42 stored in said memory 41 and executable on said processor 40. The processor 40, when executing the computer program 42, implements the steps in the various UPS control method embodiments described above, such as steps 201-202 shown in fig. 2. Alternatively, the processor 40, when executing the computer program 42, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the units 31 to 32 shown in fig. 3.
Illustratively, the computer program 42 may be partitioned into one or more modules/units that are stored in the memory 41 and executed by the processor 40 to implement the present invention. 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 42 in the UPS 4. For example, the computer program 42 may be divided into a first acquisition unit and a rectification synchronization unit, and each unit functions specifically as follows:
the first acquisition unit is used for acquiring an inversion carrier signal of the inversion module;
and the rectification synchronization unit is used for synchronously adjusting the initial carrier signal of the rectification module based on the inversion carrier signal to obtain a rectification carrier signal, wherein the inversion carrier signal represents the carrier signal actually controlling the inversion module, and the rectification carrier signal represents the carrier signal actually controlling the rectification module.
The UPS may include, but is not limited to, a processor 40, a memory 41. Those skilled in the art will appreciate that fig. 4 is merely an example of a UPS and is not intended to be limiting and may include more or fewer components than those shown, or some combination of components, or different components, for example, the UPS may also include input output devices, network access devices, buses, etc.
The Processor 40 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, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 41 may be an internal storage unit of the UPS, such as a hard disk or a memory of the UPS. The memory 41 may also be an external storage device of the UPS4, such as a plug-in hard disk provided on the UPS, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory 41 may also include both internal storage units of the UPS4 and external storage devices. The memory 41 is used to store the computer programs and other programs and data required by the UPS. The memory 41 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned 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 system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
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 invention.
In the embodiments provided herein, it should be understood that the disclosed apparatus/UPS and method may be implemented in other ways. For example, the above-described apparatus/UPS embodiments are merely illustrative, and for example, the division of the modules or units is merely a logical division, and other divisions may be implemented in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented. 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 invention 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 of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. 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 invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will 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 invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A control method of a UPS is characterized in that an input end of a rectification module of the UPS is connected with a power grid, a bypass of the UPS is communicated, and therefore an output of an inversion module of the UPS feeds energy back to the power grid through the communicated bypass;
the control method comprises the following steps:
acquiring an inversion carrier signal of the inversion module;
and based on the inversion carrier signal, synchronously adjusting the initial carrier signal of the rectification module to obtain a rectification carrier signal, wherein the inversion carrier signal represents a carrier signal actually controlling the inversion module, and the rectification carrier signal represents a carrier signal actually controlling the rectification module.
2. The method according to claim 1, wherein the synchronously adjusting the initial carrier signal of the rectification module based on the inverted carrier signal to obtain the rectified carrier signal comprises:
and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
3. The method for controlling a UPS according to claim 1 or 2, further comprising, before the obtaining the inverted carrier signal of the inverting module:
and acquiring a synchronous signal, and synchronously adjusting the initial carrier signal of the inversion module based on the synchronous signal to obtain an inversion carrier signal.
4. The method of claim 3, wherein the UPS is a slave in a parallel operation system, and the obtaining the synchronization signal comprises:
and acquiring a synchronous signal output by a host in the parallel operation system.
5. The method of claim 4, wherein the UPS is a master in a parallel operation system, and the obtaining the synchronization signal comprises:
the method comprises the steps of obtaining an initial carrier signal of an inversion module of a host, and using the initial carrier signal as a synchronous signal.
6. The method for controlling a UPS according to claim 5, wherein the step of obtaining an initial carrier signal of an inverter module of the host itself and using the initial carrier signal as a synchronization signal comprises:
and outputting the synchronous signal to enable the slave of the parallel machine system to carry out carrier synchronization based on the synchronous signal.
7. The control device of the UPS is characterized in that the input end of a rectification module of the UPS is connected with a power grid, a bypass of the UPS is communicated, so that the output of an inversion module of the UPS feeds energy back to the power grid through the communicated bypass;
the control device includes:
the first acquisition unit is used for acquiring an inversion carrier signal of the inversion module;
and the rectification synchronization unit is used for synchronously adjusting the initial carrier signal of the rectification module based on the inversion carrier signal to obtain a rectification carrier signal, wherein the inversion carrier signal represents the carrier signal actually controlling the inversion module, and the rectification carrier signal represents the carrier signal actually controlling the rectification module.
8. The control device of the UPS of claim 7, wherein the commutation synchronization unit is specifically configured to:
and adjusting the phase difference between the initial carrier signal of the rectification module and the inversion carrier signal to obtain a rectification carrier signal synchronous with the inversion carrier signal.
9. A UPS comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the control method of the UPS according to any one of claims 1 to 6 above when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method for controlling a UPS according to any one of claims 1 to 6.
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| CN107017762A (en) * | 2017-02-21 | 2017-08-04 | 三峡大学 | A kind of direct current capacitors method for inhibiting harmonic current |
| CN109428393A (en) * | 2017-08-25 | 2019-03-05 | 施耐德电气It公司 | Uninterruptible power system and method |
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