CN110994783B - Uninterruptible power supply and control method thereof - Google Patents
Uninterruptible power supply and control method thereof 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
- H02J9/062—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 for AC powered loads
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Abstract
本申请公开了一种不间断电源及其控制方法，涉及供电控制领域。上述不间断电源内部设置有第一接口、第二接口、第一开关、第二开关和第三开关，上述第一接口用于与第一外部电源、第二外部电源和第一负载连接，上述第二接口用于与第二外部电源连接，第一开关的一端分别与第一接口和第二开关的一端连接，第一开关的另一端与电源变换本体的输出端连接；第二开关的一端分别与第一接口和第一开关的一端连接，第二开关的另一端分别与电源变换本体的输入端和第三开关的另一端连接；第三开关的一端与第二接口连接，第三开关的另一端与电源变换本体的输入端连接。本申请方案提供的控制方法可以增加供电系统的可靠性。
The application discloses an uninterruptible power supply and a control method thereof, and relates to the field of power supply control. The above-mentioned uninterruptible power supply is internally provided with a first interface, a second interface, a first switch, a second switch and a third switch, the above-mentioned first interface is used for connecting with the first external power supply, the second external power supply and the first load, the above-mentioned The second interface is used to connect with the second external power supply, one end of the first switch is connected to the first interface and one end of the second switch respectively, the other end of the first switch is connected to the output end of the power conversion body; one end of the second switch is connected are respectively connected with the first interface and one end of the first switch, and the other end of the second switch is respectively connected with the input end of the power conversion body and the other end of the third switch; one end of the third switch is connected with the second interface, and the third switch The other end is connected to the input end of the power conversion body. The control method provided by the solution of the present application can increase the reliability of the power supply system.
Description
Technical Field
The application relates to the field of power supply control, in particular to an uninterruptible power supply and a control method thereof.
Background
An Uninterruptible Power Supply (UPS) is an important external device capable of providing continuous, stable and uninterrupted power supply for a load, and when mains supply input is normal, the UPS supplies the regulated mains supply to the load, and the UPS is an ac type voltage regulator and can also charge an internal battery.
In practical applications, in order to ensure uninterrupted power supply of an important load, an uninterruptible power supply UPS is often used to access power supply equipment, so as to ensure the power supply quality of the important load. In some application environment, the power grid can supply power for the load with new forms of energy power generation system jointly, UPS has multiple input source from this, needs multiple input port, and on the other hand, between the multiple input source, need carry out reasonable dispatch to guarantee that load end can both normally supply power under the various operating modes, charge the energy storage to UPS's reserve battery under the sufficient condition of input power simultaneously, so that reserve power can supply power for the load under the condition of input source outage. Therefore, how to design the UPS interface to access different input sources and ensure power supply reliability is a problem to be solved for a UPS with multiple input sources.
Disclosure of Invention
The application provides an uninterruptible power supply and a control method thereof, wherein an interface is simple, and the reliability of a power supply system can be improved.
In order to achieve the above technical effect, a first aspect of the present application provides an uninterruptible power supply, which is applied to a power supply system, where the power supply system includes: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply, the first interface is used for being connected with the first external power supply, the second external power supply and the first load, the second interface is used for being connected with the second external power supply, one end of the first switch is respectively connected with one end of the first interface and one end of the second switch, and the other end of the first switch is connected with the output end of a power conversion body; the other end of the second switch is respectively connected with the input end of the power conversion body and the other end of the third switch; one end of the third switch is connected with the second interface, wherein the power conversion body has the function of adjusting and compensating the input electric energy.
Based on the first aspect of the present application, in a first possible implementation manner, the uninterruptible power supply further includes: the device comprises a receiving module and a control module;
the receiving module is configured to: receiving an input instruction;
the control module is used for: when the received command is a first command, closing the first switch and the third switch, and opening the second switch;
the control module is further configured to disconnect the first switch and the third switch when the received command is a second command;
the control module is further configured to close the first switch and open the second switch and the third switch when the received command is a third command;
wherein, the input conditions of the first instruction are as follows: the first external power supply supplies power abnormally and the second external power supply supplies power normally;
the input conditions of the second instruction are as follows: the first external power supply and the second external power supply are powered normally;
the input conditions of the third instruction are as follows: the first external power supply and the second external power supply are both abnormally powered.
Based on the first possible implementation manner of the first aspect of the present application, in a second possible implementation manner, when the second instruction is received, the control module is further configured to: and closing the second switch.
Based on the first aspect of the present application, or the first possible implementation manner of the first aspect of the present application, or the second possible implementation manner of the first aspect of the present application, in a third possible implementation manner, the power conversion body includes: the rectifier, the first inverter and the buck-boost circuit;
wherein one end of the rectifier is connected to the other end of the second switch and the other end of the third switch, respectively, and the other end of the rectifier is connected to one end of the buck-boost circuit and one end of the first inverter, respectively; one end of the first inverter is connected to the other end of the rectifier and one end of the buck-boost circuit, respectively, and the other end of the first inverter is connected to the other end of the first switch; and the other end of the voltage-boosting circuit is used for being connected with a storage battery of the uninterruptible power supply.
Based on the third possible implementation manner of the first aspect of the present application, in a fourth possible implementation manner, the power supply system further includes: the uninterruptible power supply further includes: a second inverter, a fourth switch and a third interface,
one end of the second inverter is connected to the battery, the other end of the second inverter is connected to one end of the fourth switch, the other end of the fourth switch is connected to the third interface, and the third interface is connected to the second load.
A second aspect of the present application provides a method for controlling an uninterruptible power supply, which is applied to a power supply system, where the power supply system includes: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply, the first interface is used for being connected with the first external power supply, the second external power supply and the first load, the second interface is used for being connected with the second external power supply, one end of the first switch is respectively connected with one end of the first interface and one end of the second switch, and the other end of the first switch is connected with the output end of a power conversion body; the other end of the second switch is respectively connected with the input end of the power conversion body and the other end of the third switch; one end of the third switch is connected with the second interface, wherein the power conversion body has the function of adjusting and compensating the input electric energy;
the control method comprises the following steps:
receiving an input instruction;
when the received command is a first command, closing the first switch and the third switch, and opening the second switch;
when the received command is a second command, the first switch and the third switch are disconnected;
when the received command is a third command, closing the first switch and opening the second switch and the third switch;
wherein, the input conditions of the first instruction are as follows: the first external power supply supplies power abnormally and the second external power supply supplies power normally;
the input conditions of the second instruction are as follows: the first external power supply and the second external power supply power normally;
the input conditions of the third instruction are as follows: the first external power supply and the second external power supply are both abnormally powered.
Based on the second aspect of the present application, in a first possible implementation manner, when the second instruction is received, the control method further includes:
and closing the second switch.
Based on the second aspect of the present application or the first possible implementation manner of the second aspect of the present application, in a second possible implementation manner, the power conversion body includes: a rectifier, a first inverter, and a buck-boost circuit, wherein one end of the rectifier is connected to the other end of the second switch and the other end of the third switch, respectively, and the other end of the rectifier is connected to one end of the buck-boost circuit and one end of the first inverter, respectively; one end of the first inverter is connected to the other end of the rectifier and one end of the buck-boost circuit, respectively, and the other end of the first inverter is connected to the other end of the first switch; the other end of the voltage-boosting circuit is connected with a storage battery of the uninterruptible power supply;
when the received command is the first command, the control method further includes: and controlling the electric energy flowing into the power supply conversion body to be sequentially subjected to rectification processing and inversion processing and then output.
Based on the second possible implementation manner of the second aspect of the present application, in a third possible implementation manner, the power supply system further includes: a second load, wherein the uninterruptible power supply further includes: a second inverter, a third interface, and a fourth switch, wherein the third interface is connected to the second load, one end of the fourth switch is connected to one end of the second inverter, the other end of the fourth switch is connected to the third interface, and one end of the second inverter is connected to the battery;
when the received instruction is the first instruction or the third instruction, the control method further includes:
closing the fourth switch.
The third aspect of the present application provides an uninterruptible power supply system, including a first external power supply, a second external power supply, a first load and an uninterruptible power supply, where a first interface, a second interface, a first switch, a second switch and a third switch are disposed inside the uninterruptible power supply, the first interface is connected to the first external power supply, the second external power supply and the first load, the second interface is connected to the second external power supply, one end of the first switch is connected to one ends of the first interface and the second switch, respectively, and the other end of the first switch is connected to an output end of a power conversion body; the other end of the second switch is connected with the input end of the power conversion body and the other end of the third switch respectively; one end of the third switch is connected with the second interface, wherein the power conversion body has the function of adjusting and compensating the input electric energy.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
it can be seen from above that, above-mentioned uninterrupted power source is applied to power supply system, and above-mentioned power supply system includes: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply; one end of the second switch is connected with the first interface and one end of the first switch respectively, and the other end of the second switch is connected with the input end of the power conversion body and the other end of the third switch respectively; one end of the third switch is connected with the second interface, and the other end of the third switch is connected with the input end of the power conversion body. Because the uninterrupted power source that this application scheme provided has two interfaces and three change over switch, connect simply between a plurality of input sources, and as long as the work according to first external power source and second external power source corresponds three switches and carries out the logic switching and can realize different operating modes, control simply just increases power supply system's reliability. On one hand, the first switch and the third switch can be closed, and the second switch is disconnected, so that the second external power supply supplies power to the load through the uninterruptible power supply, and the stability of supplying power to the load is provided; on the other hand, complementary power supply of the first external power supply and the second external power supply can be realized by disconnecting the first switch and the third switch, so that the power supply stability is ensured, and the first external power supply and the second external power supply are fully utilized; and secondly, the storage battery of the uninterruptible power supply can supply power by closing the first switch and opening the second switch and the third switch, so that the reliability of a power supply system is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of an embodiment of an uninterruptible power supply provided by the present application;
fig. 2 is a schematic structural diagram of another embodiment of an uninterruptible power supply provided by the present application;
fig. 3 is a schematic structural diagram of another embodiment of an uninterruptible power supply provided by the present application;
fig. 4 is a schematic structural diagram of another embodiment of an uninterruptible power supply provided by the present application;
FIG. 5 is a schematic flow chart diagram illustrating an embodiment of a control method provided herein;
fig. 6 is a schematic structural diagram of an embodiment of an uninterruptible power supply system provided in the present application.
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 application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the present application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited by the specific embodiments disclosed below.
Example one
The application provides an uninterrupted power source is applied to power supply system, and above-mentioned power supply system includes: as shown in fig. 1, the ups includes a first interface a, a second interface B, a first switch K1, a second switch K2, and a third switch K3, wherein the first interface a is configured to be connected to the first external power source, the second external power source, and the first load, the second interface B is configured to be connected to the second external power source, one end of the first switch K1 is connected to one ends of the first interface a and the second switch K2, and the other end of the first switch K1 is connected to an output end of a power conversion body; the other end of the second switch K2 is connected to the input terminal of the power conversion body and the other end of the third switch K3; one end of the third switch K3 is connected to the second interface B, and the power conversion body has a function of adjusting and compensating the input electric power.
Optionally, the uninterruptible power supply further includes: the device comprises a receiving module and a control module;
the receiving module is configured to: receiving an input instruction;
the control module is used for: when the received command is a first command, the first switch and the third switch are closed, the second switch is opened, so that electric energy output by the second external power supply flows into the uninterruptible power supply through the second interface, is processed by the power supply conversion body and supplies power to the first load, and the input condition of the first command is as follows: the first external power supply supplies power abnormally and the second external power supply supplies power normally;
in the embodiment of the present invention, the first external power source may be a power grid, the second external power source may be a wind power plant, and the wind power plant (i.e., the second external power source) further includes an ac converter, and when the power grid is abnormally supplied and the wind power plant is normally supplied with power, the third switch is closed so that a voltage of the electric energy output from the wind power plant is converted into a first voltage by the ac converter and then input to the uninterruptible power supply, the first voltage being a rated voltage of the power conversion main body; and closing the first switch and opening the second switch so that the electric energy output by the wind power station is processed by the uninterruptible power supply to supply power to the first load.
Optionally, as shown in fig. 2, the power conversion body includes: a rectifier 201, a first inverter 202 and a buck-boost circuit 203;
one end of the rectifier 201 is connected to the other end of the second switch K2 and the other end of the third switch K3, respectively, and the other end of the rectifier 201 is connected to one end of the buck-boost circuit 203 and one end of the first inverter 202, respectively; one end of the first inverter 202 is connected to the other end of the rectifier 201 and one end of the step-up/step-down circuit 203, and the other end of the first inverter 202 is connected to the other end of the first switch K1; the other end of the step-up/down circuit 203 is connected to a battery of the uninterruptible power supply;
in this embodiment, the uninterruptible power supply further includes: a transformer, one end of which is connected to the first interface, and the other end of which is connected to one end of the first switch and one end of the second switch, respectively;
when the first instruction is received, the first switch and the third switch are closed, the second switch is opened, and the electric energy flowing into the uninterruptible power supply is controlled to be processed by the rectifier 201, the first inverter 202 and the transformer in sequence to supply power to a first load; meanwhile, the electric energy flowing into the ups also charges a battery of the ups through the rectifier 201 and the buck-boost circuit 203.
In an embodiment of the present invention, when the first external power supply is abnormal and the second external power supply is normal, the first switch and the third switch are closed, and the second switch is opened, so that the electric energy output by the second external power supply flows into the uninterruptible power supply through the second interface and is processed by the power conversion body to supply power to the first load, where the power conversion body is a system device that connects the input source and the storage battery to the host respectively, and converts the input source ac power into another ac power through rectification and inversion processes or converts the storage battery dc power into an ac power through buck-boost processes and inversion processes, and the power conversion body has at least the following functions: the input unstable electric energy is converted into stable electric energy to be output, and under the condition that the output electric energy is insufficient, the electric energy of the storage battery is converted into stable electric energy to be output to a load for power supply.
The control module is further configured to, when the received instruction is a second instruction, disconnect the first switch and the third switch, so that the first external power supply and the second external power supply are connected in parallel to supply power to the first load, where the input condition of the second instruction is: the first external power supply and the second external power supply are powered normally;
in an embodiment of the application, when the second instruction is received, the electric energy output by the second external power source is converted into a second voltage by the ac converter and then supplies power to the first load together with the electric energy output by the first external power source, where the second voltage is a rated voltage of the first external voltage.
In this embodiment, the first external power source may be a power grid, the second external power source may be a new energy power supply system, and when the received instruction is the second instruction, the first switch and the third switch are turned off, so that the power grid and the new energy power supply system supply power to a load together, the new energy is fully utilized, and resources are saved.
Optionally, when receiving the second instruction, the control module is further configured to: closing the second switch so that the first external power supply or the second external power supply charges a storage battery of the uninterruptible power supply through the first interface; in another embodiment, the third switch may be closed, so that the second external power source charges a storage battery of the uninterruptible power supply through the second interface.
In this embodiment, when the second command is received, the second switch and the third switch are closed, so that the storage battery of the uninterruptible power supply can be charged through the first interface and the second interface at the same time;
the control module is further configured to, when the received instruction is a third instruction, close the first switch and open the second switch and the third switch, so that a storage battery of the uninterruptible power supply supplies power to the first load, and both the first external power supply and the second external power supply power abnormally;
in this embodiment, when the third instruction is received, the first switch is closed, the second switch and the third switch are opened, and the electric energy flowing out from the storage battery of the uninterruptible power supply is controlled to be processed by the buck-boost circuit, the first inverter and the transformer in sequence to supply power to the first load.
Optionally, as shown in fig. 3 or 4, the power supply system further includes: the uninterruptible power supply further includes: a second inverter 204, a third interface C for connecting to the second load, and a fourth switch K4, wherein one end of the fourth switch K4 is connected to one end of the second inverter 204, the other end of the fourth switch K4 is connected to the third interface C, and the other end of the second inverter 204 is connected to a battery of an uninterruptible power supply;
when the received instruction is the first instruction or the third instruction, the control module is further configured to: closing the fourth switch K4.
In an embodiment of the application, when the received command is the first command or the third command, the fourth switch is closed, so that the direct current output by the storage battery of the uninterruptible power supply is controlled to be converted into alternating current with a third voltage through the second inverter, and then the alternating current is used for supplying power to the second load, where the third voltage is a rated voltage of the second load.
It can be seen from above that, above-mentioned uninterrupted power source is applied to power supply system, and above-mentioned power supply system includes: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply; one end of the second switch is connected with the first interface and one end of the first switch respectively, and the other end of the second switch is connected with the input end of the power conversion body and the other end of the third switch respectively; one end of the third switch is connected with the second interface, and the other end of the third switch is connected with the input end of the power conversion body. Because the uninterrupted power source that this application scheme provided has two interfaces and three change over switch, connect simply between a plurality of input sources, and as long as the work according to first external power source and second external power source corresponds three switches and carries out the logic switching and can realize different operating modes, control simply just increases power supply system's reliability. On one hand, the first switch and the third switch can be closed, and the second switch is disconnected, so that the second external power supply supplies power to the load through the uninterruptible power supply, and the stability of supplying power to the load is provided; on the other hand, complementary power supply of the first external power supply and the second external power supply can be realized by disconnecting the first switch and the third switch, so that the power supply stability is ensured, and the first external power supply and the second external power supply are fully utilized; and secondly, the storage battery of the uninterruptible power supply can supply power by closing the first switch and opening the second switch and the third switch, so that the reliability of a power supply system is improved.
Example two
The application also provides a control method of the uninterruptible power supply, which is applied to a power supply system, wherein the power supply system comprises: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply, the first interface is used for being connected with the first external power supply, the second external power supply and the first load, the second interface is used for being connected with the second external power supply, one end of the first switch is respectively connected with one end of the first interface and one end of the second switch, and the other end of the first switch is connected with the output end of a power conversion body; the other end of the second switch is respectively connected with the input end of the power conversion body and the other end of the third switch; one end of the third switch is connected with the second interface, wherein the power conversion body has the function of adjusting and compensating the input electric energy. Specifically, the structure of the ups may refer to the ups shown in fig. 1, fig. 2, or fig. 3.
As shown in fig. 5, the control method includes:
optionally, when receiving the second instruction, the control method further includes: closing the second switch;
optionally, the power conversion body includes: a rectifier, a first inverter, and a buck-boost circuit, wherein one end of the rectifier is connected to the other end of the second switch and the other end of the third switch, respectively, and the other end of the rectifier is connected to one end of the buck-boost circuit and one end of the first inverter, respectively; one end of the inverter is connected to the other end of the rectifier and one end of the buck-boost circuit, respectively, and the other end of the first inverter is connected to the other end of the first switch; the other end of the voltage-boosting circuit is connected with a storage battery of the uninterruptible power supply;
when the received instruction is the first instruction, the control method further includes: and controlling the electric energy flowing into the power supply conversion body to be sequentially subjected to rectification processing and inversion processing and then output.
Optionally, the power supply system further includes: the uninterruptible power supply further includes: a second inverter, a third interface, and a fourth switch, wherein the third interface is used for connecting with the second load, one end of the fourth switch is connected with one end of the second inverter, the other end of the fourth switch is connected with the third interface, and the other end of the second inverter is connected with a storage battery of an uninterruptible power supply;
when the received instruction is the first instruction or the third instruction, the control method further includes: closing the fourth switch.
It can be seen from above that, above-mentioned uninterrupted power source is applied to power supply system, and above-mentioned power supply system includes: the uninterruptible power supply comprises a first external power supply, a second external power supply and a first load, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged in the uninterruptible power supply; one end of the second switch is connected with the first interface and one end of the first switch respectively, and the other end of the second switch is connected with the input end of the power conversion body and the other end of the third switch respectively; one end of the third switch is connected with the second interface, and the other end of the third switch is connected with the input end of the power conversion body; the control method comprises the following steps: receiving an input instruction; when the received command is a first command, the first switch and the third switch are closed, the second switch is opened, and the input condition of the first command is as follows: the first external power supply supplies power abnormally and the second external power supply supplies power normally; and when the received command is a second command, disconnecting the first switch and the third switch, wherein the input condition of the second command is as follows: the first external power supply and the second external power supply are powered normally; when the received command is a third command, closing the first switch, and opening the second switch and the third switch, wherein the input condition of the third command is as follows: the first external power supply and the second external power supply are both abnormally powered. Because the uninterrupted power source that this application scheme provided has two interfaces and three change over switch, connect simply between a plurality of input sources, and as long as the work according to first external power source and second external power source corresponds three switches and carries out the logic switching and can realize different operating modes, control simply just increases power supply system's reliability. On one hand, the input conditions of the first instruction are as follows: the first external power supply supplies power abnormally and the second external power supply supplies power normally, so that the first switch and the third switch are closed, and the second switch is disconnected, so that the second external power supply supplies power to the load through the uninterruptible power supply, and the stability of supplying power to the load is provided; on the other hand, the input conditions of the second instruction are as follows: the first external power supply and the second external power supply are connected in parallel for supplying power, complementary power supply of the first external power supply and the second external power supply can be realized by disconnecting the first switch and the third switch, the power supply stability is ensured, and the first external power supply and the second external power supply are fully utilized; next, the input conditions of the third instruction are: the first external power supply and the second external power supply both supply power abnormally, and the storage battery of the uninterruptible power supply can supply power by closing the first switch and disconnecting the second switch and the third switch, so that the reliability of a power supply system is improved.
EXAMPLE III
The application also provides a control method of the uninterruptible power supply, which is applied to an uninterruptible power supply system, and as shown in fig. 6, the control method comprises a first external power supply, a second external power supply, a first load and an uninterruptible power supply, wherein a first interface, a second interface, a first switch, a second switch and a third switch are arranged inside the uninterruptible power supply, the first interface is connected with the first external power supply, the second external power supply and the first load, the second interface is connected with the second external power supply, one end of the first switch is respectively connected with one ends of the first interface and the second switch, and the other end of the first switch is connected with an output end of a power conversion body; the other end of the second switch is connected with the input end of the power conversion body and the other end of the third switch respectively; one end of the third switch is connected with the second interface, wherein the power conversion body has the function of adjusting and compensating the input electric energy.
The beneficial effects of the embodiment are similar to those of the uninterruptible power supply and the control method of the uninterruptible power supply, and are not described herein again.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
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 functions may be distributed as different functional units and modules according to needs, that is, the internal structure of the apparatus may be divided into different functional units or modules to implement 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.
It should be noted that, the methods and the details thereof provided by the foregoing embodiments may be combined with the apparatuses and devices provided by the embodiments, which are referred to each other and are not described again.
Those of ordinary skill in the art would appreciate that the elements and algorithm steps of the examples 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 disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described apparatus/device embodiments are merely illustrative, and for example, the division of the above modules or units is only one type of logical function division, and the actual implementation may be realized by another division manner, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit 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 (9)
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| JP3446773B2 (en) * | 1994-07-22 | 2003-09-16 | 新神戸電機株式会社 | Uninterruptible power system |
| US7265458B2 (en) * | 2005-04-08 | 2007-09-04 | Eaton Power Quality Corporation | Apparatus and methods for coordinated static switch operations for load transfers in uninterruptible power supply systems |
| CN203660641U (en) * | 2013-12-04 | 2014-06-18 | 深圳科士达新能源有限公司 | Hybrid inverter with uninterrupted power supply function |
| CN203674793U (en) * | 2014-01-09 | 2014-06-25 | 广东易事特电源股份有限公司 | On-line power frequency uninterrupted power supply |
| US9859752B2 (en) * | 2015-06-05 | 2018-01-02 | General Electric Company | Uninterruptible power supply and method of use |
| CN204721088U (en) * | 2015-07-14 | 2015-10-21 | 厦门科华恒盛股份有限公司 | A kind of UPS bypass inversion switching device shifter |
| CN208028656U (en) * | 2018-04-09 | 2018-10-30 | 国网新疆电力有限公司巴州供电公司 | Based on solar powered uninterrupted accessory power supply control device |
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