CN114243893A - UPS power supply control method, UPS equipment and computer readable storage medium - Google Patents
UPS power supply control method, UPS equipment and computer readable storage medium Download PDFInfo
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- CN114243893A CN114243893A CN202111682561.0A CN202111682561A CN114243893A CN 114243893 A CN114243893 A CN 114243893A CN 202111682561 A CN202111682561 A CN 202111682561A CN 114243893 A CN114243893 A CN 114243893A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- 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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
Abstract
The invention provides a UPS power supply control method, UPS equipment and a computer readable storage medium, wherein the method comprises the following steps: detecting the current at the output interface in real time to obtain an output current detection value; when the output current detection value is smaller than or equal to a first preset threshold value, controlling the bypass power supply path to be kept on, controlling the inversion power supply path to be disconnected, and charging the energy storage unit by the rectification unit; and when the output current detection value is larger than the first preset threshold value, controlling the bypass power supply path and the inverter power supply path to be simultaneously conducted, and supplying power to the inverter power supply path by the energy storage unit. According to the invention, when the output current of the UPS equipment is larger than the preset current, the bypass power supply path and the inverter power supply path are conducted simultaneously, and the energy storage unit is used for supplying power to the load, so that the requirement on an input power supply part can be reduced, and the power distribution system can supply power stably.
Description
Technical Field
The present invention relates to the field of uninterruptible power supplies, and more particularly, to a UPS power supply control method, a UPS device, and a computer-readable storage medium.
Background
With the rapid development of modern society and the continuous progress of industrial technology, various loads such as bamboo shoots appear in spring after rain. The power supply devices used for different types of loads are often different. At present, most alternating current power supply equipment mainly adopts a constant voltage source working mode and a constant current source working mode, wherein in the constant voltage source working mode, the output voltage is ensured to the maximum capacity no matter the nature and the requirement of an output load; and under the constant current source working mode, the required current is provided for the load to the maximum capacity. The ac Power Supply devices with these two operating modes have very wide application, and most UPSs (Uninterruptible Power supplies) use a constant voltage source operating mode.
However, in some application scenarios, the input power is stable, and the load is stable for most of the time, but the load becomes larger at regular instants in some time periods, such as some professional computer group loads. If general UPS equipment is adopted for supplying power, when an input power supply and the UPS equipment are configured, the type selection design of a power distribution switch, a power supply cable and related power supply equipment must be carried out according to the instantaneous maximum load capacity, namely the allowable current of the power distribution switch needs to be increased, the power supply cable needs to be thickened, and even the power of the power supply equipment needs to be increased, so that the cost is greatly increased and the resources are wasted.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a UPS power supply control method, a UPS device, and a computer-readable storage medium, for the above-mentioned problems of greatly increasing the cost of the power supply portion and wasting resources in order to meet the demand of the instantaneous increase of the load power.
In order to solve the above technical problems, the present invention provides a UPS power supply control method, where the UPS includes a bypass power supply path and an inverter power supply path connected in parallel between an input interface and an output interface, and the inverter power supply path includes a rectifying unit, an energy storage unit, and an inverter unit connected to a dc bus, respectively, and the method includes:
detecting the current at the output interface in real time to obtain an output current detection value;
when the output current detection value is smaller than or equal to a first preset threshold value, controlling the bypass power supply path to be kept on, controlling the inversion power supply path to be disconnected, and charging the energy storage unit by the rectification unit;
and when the output current detection value is larger than the first preset threshold value, controlling the bypass power supply path and the inverter power supply path to be simultaneously conducted, and supplying power to the inverter power supply path by the energy storage unit.
As a further improvement of the present invention, the rectifying unit is electrically connected to the input interface via a first switch unit, the inverting unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the dc bus via a third switch unit;
control bypass power supply route and contravariant power supply route switch on simultaneously to by the energy storage unit is for the contravariant power supply route supplies power, include:
detecting the current of the bypass power supply path in real time to obtain a bypass current detection value;
and controlling the first switch unit to be switched off, and the second switch unit and the third switch unit to be switched on, so that the energy storage unit outputs required energy to the inverter unit, and controlling the current of the inverter power supply path in a closed loop mode according to the difference value between the bypass current detection value and the first preset threshold value, so that the bypass current detection value is always maintained at the first preset threshold value.
As a further improvement of the present invention, the rectifying unit is electrically connected to the input interface via a first switch unit, the inverting unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the dc bus via a third switch unit;
control the bypass power supply path keeps switching on, and control the contravariant power supply path disconnection, and by the energy storage unit charges for the rectification unit, include:
detecting the current of an input interface in real time to obtain an input current detection value;
and controlling the first switch unit and the third switch unit to be switched on and the second switch unit to be switched off, charging the energy storage unit by the rectifying unit, and controlling the charging current according to the input current detection value and the characteristics of the energy storage unit, so that the input current detection value is not greater than a second preset threshold value all the time, and meanwhile, the energy storage unit is charged by the maximum capacity, and the second preset threshold value is smaller than the first preset threshold value.
As a further improvement of the present invention, the method further comprises: and receiving input information, and adjusting the first preset threshold according to the input information.
The invention also provides UPS equipment, wherein the UPS comprises an input interface, an output interface, a bypass power supply path, an inversion power supply path, a current detection unit and a controller, the bypass power supply path and the inversion power supply path are connected between the input interface and the output interface in parallel, and the inversion power supply path comprises a rectifying unit, an energy storage unit and an inversion unit which are respectively connected to the direct current bus; wherein:
the current detection unit is used for detecting the current at the output interface in real time to obtain an output current detection value;
the controller is used for controlling the bypass power supply path to be conducted and simultaneously controlling the inverter power supply path to be disconnected when the output current detection value is smaller than or equal to a first preset threshold value, and the energy storage unit is charged by the rectifying unit; and when the output current detection value is larger than the first preset threshold value, controlling the bypass power supply path and the inverter power supply path to be simultaneously conducted, and supplying power to the inverter power supply path by the energy storage unit.
As a further improvement of the present invention, the rectifying unit is electrically connected to the input interface via a first switch unit, the inverting unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the dc bus via a third switch unit;
the current detection unit is also used for detecting the current of the bypass power supply path in real time to obtain a bypass current detection value;
when the output current detection value is larger than or equal to the first preset threshold value, the controller controls the first switch unit to be switched off, controls the second switch unit and the third switch unit to be switched on, enables the energy storage unit to output required energy to the inversion unit, and controls the inversion power supply path current in a closed loop mode according to the difference value between the bypass current detection value and the first preset threshold value, so that the bypass detection current value is always maintained at the first preset threshold value.
As a further improvement of the present invention, the rectifying unit is electrically connected to the input interface via a first switch unit, the inverting unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the dc bus via a third switch unit;
the current detection unit is also used for detecting the current of the input interface in real time to obtain an input current detection value;
the controller controls the first switch unit and the third switch unit to be connected and controls the second switch unit to be disconnected when the output current detection value is smaller than or equal to a first preset threshold value, the energy storage unit is charged by the rectifying unit, and the charging current is controlled according to the input current detection value and the characteristics of the energy storage unit, so that the energy storage unit is charged with the maximum capacity while the input current detection value is not larger than a second preset threshold value all the time, and the second preset threshold value is smaller than the first preset threshold value.
The invention also provides a UPS device, which comprises a memory and a processor, wherein the memory is stored with a computer program which can be executed by the processor, and the processor executes the computer program to realize the steps of the UPS power supply control method.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the UPS power supply control method as described above.
The invention has the following beneficial effects: when the output current of the UPS equipment is larger than the preset current, the bypass power supply path and the inversion power supply path are conducted simultaneously, and the energy storage unit is used for supplying power to the load, so that the requirement on the power supply part of the load can be reduced, and the power distribution system supplies power stably.
Drawings
Fig. 1 is a schematic flowchart of a UPS power supply control method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a process of controlling simultaneous conduction of a bypass power supply path and an inverter power supply path in the UPS power supply control method according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a UPS apparatus provided by an embodiment of the present invention;
fig. 4 is a schematic diagram of a UPS apparatus according to another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In some application scenarios, the load keeps its operating current stable most of the time, but there are regular moments that become large at some time periods, such as a professional computer group. The UPS power supply control method can be applied to the load and supplies power to the load.
Fig. 1 is a schematic flow chart of a UPS power supply control method according to an embodiment of the present invention, where the method is applicable to a UPS device that supplies power to a load. As shown in fig. 3, the UPS device includes a controller 31, a bypass power supply path 32, an inverter power supply path 33, an input interface 34, and an output interface 35, and the UPS device is connected to a power supply (e.g., a utility power or other ac power) through the input interface 34 and connected to a load (which may include a plurality of physical devices) through the output interface 35. The bypass power supply path 32 and the inverter power supply path 33 are connected in parallel between the input interface 34 and the output interface 35, the bypass power supply path 32 may include a contactor, a thyristor, and other switching devices, the inverter power supply path 33 includes a rectifying unit 331, an energy storage unit 333, an inverter unit 332, and other switching devices, wherein an output end of the rectifying unit 331 is electrically connected to an input end of the inverter unit 332 through a dc bus, the energy storage unit 333 may employ a storage battery, and the energy storage unit 333 is electrically connected to the dc bus through a switch.
The UPS power supply control method of the present embodiment may be executed by the controller 31, and the controller 31 may be constituted by a control unit of the UPS device or may be constituted by a separate controller connected to the control unit of the UPS device. Specifically, the method of the embodiment includes:
step S11: the current at the output interface 35 of the UPS is detected in real time to obtain an output current detection value.
Specifically, the cable at the output interface 35 of the UPS may be detected by a hall element or the like to obtain an output current detection value. Of course, in practical applications, any conventional method may be used to detect the output interface 35 of the UPS. Current sensing is well known in the art and will not be described herein.
Step S12: it is determined whether the output current detection value detected in step S11 is less than or equal to the first preset threshold Iref. If the detected output current value is less than or equal to the first preset threshold value Iref, step S13 is executed, otherwise step S14 is executed. In practical applications, the output current obtained by the current detection value at the output interface 35 or other means is compared with the first preset threshold value Iref.
The first preset threshold Iref may be set according to the load type, the load rated power, and the like. For example, when the normal operating current of the load is about 80% of the rated current of the load, and the instantaneous inrush current of the load is at most 130% of the rated power of the load, the first preset threshold Iref may be set to 90% of the rated current of the UPS.
Also, an input interface may be provided such that the UPS device may receive input information and adjust the first preset threshold Iref according to the input information.
Step S13: the bypass power supply path is controlled to be conducted, the inverter power supply path is controlled to be disconnected, and the energy storage unit 333 is charged by the rectification unit 331. Namely, when the working current of the load is less than or equal to the first preset threshold value, the bypass power supply path solely supplies power to the load.
The bypass power supply path and the inverter power supply path can be respectively provided with a switching device (such as a contactor, a silicon controlled rectifier and the like), and the on-off control of the bypass power supply path and the inverter power supply path can be realized by controlling the on-off of the switching devices in the bypass power supply path and the inverter power supply path.
Step S14: and controlling the bypass power supply path and the inverter power supply path to be conducted simultaneously. That is, when the working current of the load is greater than the first preset threshold, the bypass power supply path and the inverter power supply path supply power to the load at the same time, and in the inverter power supply path, the energy storage unit 333 supplies power to the inverter unit 332, that is, after the inverter unit 332 converts the electric energy stored in the energy storage unit 333 into alternating current, the alternating current and the alternating current supply power to the load together with the bypass power supply path, so that the current of the bypass power supply path and the input current of the entire UPS are correspondingly reduced.
According to the UPS power supply control method, when the working current of the load is larger than the first preset threshold value, the bypass power supply path and the inversion power supply path output current to the load at the same time, namely, energy is extracted from the local energy storage device (namely, the energy storage unit 333) in time, so that the input current peak value of the UPS device does not exceed the selected threshold value (namely, the first preset threshold value Iref), and the input power consumption peak value is smoothed. In this way, the power distribution switch, the power supply cable, and the like at the front end of the UPS device can be configured in accordance with the rated capacity of the UPS device without increasing the power supply capacity in consideration of the increase in instantaneous current. The method is mainly applied to some professional data centers, so that the data center infrastructure power supply system has higher safe operation load, the feasibility and the reliability of the system are improved, and the expected cost is reduced.
In an embodiment of the invention, the rectifying unit 331 of the inverter power supply path 33 of the UPS device is electrically connected to the input interface 34 through a first switching unit (e.g., a contactor or a thyristor, etc.), the inverting unit 332 is electrically connected to the output interface 35 through a second switching unit (e.g., a contactor or a thyristor, etc.), and the energy storage unit 333 is electrically connected to the dc bus through a third switching unit (e.g., a contactor or a thyristor, etc.).
The step S14 further includes: and detecting the current of a bypass power supply path of the UPS in real time to obtain a bypass current detection value. Correspondingly, as shown in fig. 2, the step S14 in fig. 1 specifically includes, when controlling the bypass power supply path and the inverter power supply path to be simultaneously turned on:
step S141: and controlling the first switch unit to be switched off. So that the inverting power supply path no longer draws input current from the input interface 34.
Specifically, the first switching unit may be turned off by outputting a control signal to a control loop of the first switching unit.
Step S142: the second switching unit and the third switching unit are controlled to be conducted, so that the energy storage unit 333 supplies power to the inverter unit 332 (namely, the energy storage unit 333 is switched to a power supply state), and the current of the inverter power supply path is controlled in a closed loop mode according to the difference value between the detected value of the bypass current of the UPS device and the first preset threshold value, so that the bypass current is always maintained at the first preset threshold value.
Specifically, both the second switching unit and the third switching unit may be turned on by outputting control signals to control loops of the second switching unit and the third switching unit, respectively. At the moment, the first switch unit is disconnected, the second switch unit and the third switch unit are connected, and the inversion unit obtains direct current electric energy from the energy storage unit through the direct current bus, inverts the direct current electric energy into alternating current electric energy and outputs the alternating current electric energy. When the inversion unit outputs alternating current electric energy, the inversion unit operates in a current source working mode, the inversion voltage of the inversion unit completely tracks the voltage of the bypass power supply path, and the inversion current is obtained by the difference value between the current bypass current detection value of the UPS equipment and the first preset threshold Iref through closed-loop control. The closed loop control process is conventional in the art and will not be described further herein.
By the mode, the input current of the UPS equipment can be kept smooth, the maximum input current does not exceed the first preset threshold Iref, and the output current can meet the requirement of instantaneous increase of the load.
In an embodiment of the present invention, the step S13 above further includes detecting the current of the input interface in real time to obtain the input current detection value. Accordingly, step S13 in fig. 1 controls the inverter power supply path to be disconnected when the detected value of the output current is less than or equal to the first preset threshold, including:
the first switch unit and the third switch unit are controlled to be switched on, the second switch unit is controlled to be switched off, the energy storage unit enters the charging unit, the energy storage unit 333 is charged through the rectifying unit 331, and the charging current is controlled according to the input current detection value and the characteristics of the energy storage unit 333, so that the energy storage unit 333 is charged with the maximum capacity while the input current detection value is not larger than a second preset threshold value all the time. Specifically, the first switching unit and the third switching unit may be turned on by outputting control signals to control loops of the first switching unit and the third switching unit, respectively, and the second switching unit may be turned off by outputting control signals to a control loop of the second switching unit. The second preset threshold can be set as required, and the second preset threshold is smaller than the first preset threshold.
By the mode, when the output current detection value of the UPS equipment does not exceed the first preset threshold Iref, the UPS equipment works in a bypass power supply mode. Meanwhile, the rectifying unit 331 charges and stores energy to the energy storage unit 333 to compensate energy output when the load is too large, and the inverting unit 332 is always in a standby state of completely tracking the voltage of the bypass power supply path, so as to be ready for energy compensation at any time. Once the detected value of the output current of the UPS device exceeds the first preset threshold Iref, the UPS device is controlled to operate in the bypass and inversion combined power supply state, at this time, the rectification unit 331 is in standby, and is ready to continue to supply power to the energy storage unit 333 at any time, and the inversion unit 332 operates in the current source mode. The inversion voltage of the inversion unit 332 also completely tracks the voltage of the bypass power supply path all the time, and the inversion current is obtained by the difference between the current bypass current detection value of the UPS device and the first preset threshold Iref through closed-loop control. When the output current returns to be lower than the first preset threshold value Iref again, the UPS device switches to the bypass power supply mode again, the rectifying unit 331 charges the energy storage unit 333, and the inverting unit 332 enters the standby state. Therefore, the input current (the sum of the bypass power supply path current and the input current of the rectifying unit) of the UPS equipment cannot exceed the second preset threshold at any time, and the input current is ensured to be smooth.
As shown in fig. 3, the present invention further provides a UPS device, which includes a controller 31, a bypass power supply path 32, an inverter power supply path 33, an input interface 34, an output interface 35, and a current detection unit (not shown in the figure), and is connected to a power supply (e.g., a utility power or other ac power) through the input interface 34, and connected to a load (which may include a plurality of physical devices) through the output interface 35. The controller 31 may be a control unit of the UPS device, or may be an independent controller connected to the control unit of the UPS device.
In the above UPS apparatus, the bypass power supply path 32 and the inverter power supply path 33 are connected in parallel between the input interface 34 and the output interface 35. The current detection unit is used for detecting the current at the output interface of the UPS in real time to obtain an output current detection value. For example, the current detection unit may be constituted by a hall sensor mounted on a cable at the output interface 35. The inverter power supply path 33 includes a rectifying unit 331, an energy storage unit 333, and an inverter unit 332 electrically connected to the dc bus, respectively.
The controller 31 is configured to control the bypass power supply path 32 to be turned on and control the inverter power supply path 33 to be turned off when the output current is less than or equal to a first preset threshold, and the energy storage unit 333 is charged by the rectification unit 331; and when the output current detection value is greater than the first preset threshold value, controlling the bypass power supply path 32 and the inverter power supply path 33 to be simultaneously conducted, and supplying power to the inverter power supply path (i.e. the inverter unit 332) by the energy storage unit 333.
In one embodiment of the present invention, the current detection unit detects the current of the bypass power supply path to obtain the bypass current detection value in addition to the current at the output interface 35. Meanwhile, the rectifying unit 331 is electrically connected to the input interface 34 via the first switch unit, the inverting unit 332 is electrically connected to the output interface 35 via the second switch unit, the energy storage unit 333 is electrically connected to the dc bus via the third switch unit, and the controller 31 controls the first switch unit to be turned off and controls the second switch unit and the third switch unit to be turned on when the output current detection value of the UPS device is greater than the first preset threshold value, so that the bypass power supply path 32 and the inverting power supply path are simultaneously turned on, and the energy storage unit 333 is switched to the discharging mode to supply power to the inverting unit, and controls the output current of the inverting unit in a closed loop manner according to the difference value between the bypass current detection value and the first preset threshold value.
In one embodiment of the present invention, the current detection unit further detects the current at the input interface 34 to obtain a bypass current detection value. When the output current detection value is less than or equal to the first preset threshold value, the controller 31 controls the first switch unit and the third switch unit to be turned on, and controls the second switch unit to be turned off, so that the bypass power supply path is turned on, the inverter power supply path is turned off, and the rectifying unit 331 converts the alternating current input by the input interface 34 into direct current and then charges the energy storage unit 333.
The UPS device in this embodiment and the UPS power supply control method in the embodiment corresponding to fig. 1 to 3 belong to the same concept, and specific implementation processes thereof are detailed in the corresponding method embodiments, and technical features in the method embodiments are correspondingly applicable in the system embodiments, and are not described herein again.
As shown in fig. 4, an embodiment of the present invention further provides a UPS apparatus, where the UPS apparatus 4 includes a memory 41 and a processor 42, the memory 41 stores a computer program executable by the processor 42, and the processor 42 implements the steps of the UPS power supply control method as described above when executing the computer program.
The UPS device in this embodiment and the UPS power supply control method in the embodiment corresponding to fig. 1 to 3 belong to the same concept, and specific implementation processes thereof are detailed in the corresponding method embodiments, and technical features in the method embodiments are correspondingly applicable in the embodiment of this device, which is not described herein again.
An embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions for causing a computer to perform the UPS power supply control method as described above.
The computer-readable storage medium in this embodiment is the same as the UPS power supply control method in the embodiment corresponding to fig. 1 to 3, and specific implementation processes thereof are detailed in the corresponding method embodiments, and technical features in the method embodiments are applicable to the storage medium embodiments, which are not described herein again.
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 application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed UPS power supply control method and apparatus may be implemented in other manners.
All or part of the flow in the method of the embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and executed by a processor, to instruct related hardware to implement the steps of the embodiments of the methods. 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 physical or interface switching device, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signal, telecommunication signal, software distribution medium, etc., capable of carrying said computer program code. 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 embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (9)
1. A UPS power supply control method, the UPS includes a bypass power supply path and an inversion power supply path which are connected in parallel between an input interface and an output interface, and the inversion power supply path includes a rectification unit, an energy storage unit and an inversion unit which are respectively connected to a direct current bus, the method is characterized by comprising:
detecting the current at the output interface in real time to obtain an output current detection value;
when the output current detection value is smaller than or equal to a first preset threshold value, controlling the bypass power supply path to be kept on, controlling the inversion power supply path to be disconnected, and charging the energy storage unit by the rectification unit;
and when the output current detection value is larger than the first preset threshold value, controlling the bypass power supply path and the inverter power supply path to be simultaneously conducted, and supplying power to the inverter power supply path by the energy storage unit.
2. The UPS power supply control method of claim 1, wherein the rectification unit is electrically connected to the input interface via a first switch unit, the inverter unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the DC bus via a third switch unit;
control bypass power supply route and contravariant power supply route switch on simultaneously to by the energy storage unit is for the contravariant power supply route supplies power, include:
detecting the current of the bypass power supply path in real time to obtain a bypass current detection value;
and controlling the first switch unit to be switched off, and the second switch unit and the third switch unit to be switched on, so that the energy storage unit outputs required energy to the inverter unit, and controlling the current of the inverter power supply path in a closed loop mode according to the difference value between the bypass current detection value and the first preset threshold value, so that the bypass current detection value is always maintained at the first preset threshold value.
3. The UPS power supply control method of claim 1, wherein the rectification unit is electrically connected to the input interface via a first switch unit, the inverter unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the DC bus via a third switch unit;
control the bypass power supply path keeps switching on, and control the contravariant power supply path disconnection, and by the energy storage unit charges for the rectification unit, include:
detecting the current of an input interface in real time to obtain an input current detection value;
and controlling the first switch unit and the third switch unit to be switched on and the second switch unit to be switched off, charging the energy storage unit by the rectifying unit, and controlling the charging current according to the input current detection value and the characteristics of the energy storage unit, so that the input current detection value is not greater than a second preset threshold value all the time, and meanwhile, the energy storage unit is charged by the maximum capacity, and the second preset threshold value is smaller than the first preset threshold value.
4. The UPS power supply control method of claim 1, further comprising: and receiving input information, and adjusting the first preset threshold according to the input information.
5. The UPS equipment is characterized by comprising an input interface, an output interface, a bypass power supply path, an inversion power supply path, a current detection unit and a controller, wherein the bypass power supply path and the inversion power supply path are connected between the input interface and the output interface in parallel, and the inversion power supply path comprises a rectifying unit, an energy storage unit and an inversion unit which are respectively connected to a direct-current bus; wherein:
the current detection unit is used for detecting the current at the output interface in real time to obtain an output current detection value;
the controller is used for controlling the bypass power supply path to be conducted and simultaneously controlling the inverter power supply path to be disconnected when the output current detection value is smaller than or equal to a first preset threshold value, and the energy storage unit is charged by the rectifying unit; and when the output current detection value is larger than the first preset threshold value, controlling the bypass power supply path and the inverter power supply path to be simultaneously conducted, and supplying power to the inverter power supply path by the energy storage unit.
6. The UPS apparatus of claim 5, wherein the rectification unit is electrically connected to the input interface via a first switch unit, the inverter unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the DC bus via a third switch unit;
the current detection unit is also used for detecting the current of the bypass power supply path in real time to obtain a bypass current detection value;
when the output current detection value is larger than or equal to the first preset threshold value, the controller controls the first switch unit to be switched off, controls the second switch unit and the third switch unit to be switched on, enables the energy storage unit to output required energy to the inversion unit, and controls the inversion power supply path current in a closed loop mode according to the difference value between the bypass current detection value and the first preset threshold value, so that the bypass detection current value is always maintained at the first preset threshold value.
7. The UPS apparatus of claim 5, wherein the rectification unit is electrically connected to the input interface via a first switch unit, the inverter unit is electrically connected to the output interface via a second switch unit, and the energy storage unit is electrically connected to the DC bus via a third switch unit;
the current detection unit is also used for detecting the current of the input interface in real time to obtain an input current detection value;
the controller controls the first switch unit and the third switch unit to be connected and controls the second switch unit to be disconnected when the output current detection value is smaller than or equal to a first preset threshold value, the energy storage unit is charged by the rectifying unit, and the charging current is controlled according to the input current detection value and the characteristics of the energy storage unit, so that the energy storage unit is charged with the maximum capacity while the input current detection value is not larger than a second preset threshold value all the time, and the second preset threshold value is smaller than the first preset threshold value.
8. A UPS device comprising a memory and a processor, the memory having stored therein a computer program executable by the processor, and the processor implementing the steps of the UPS power supply control method according to any one of claims 1 to 4 when executing the computer program.
9. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the UPS power supply control method according to any one of claims 1 to 4.
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