WO2021120797A1 - 一种供电装置和供电系统 - Google Patents

一种供电装置和供电系统 Download PDF

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Publication number
WO2021120797A1
WO2021120797A1 PCT/CN2020/120482 CN2020120482W WO2021120797A1 WO 2021120797 A1 WO2021120797 A1 WO 2021120797A1 CN 2020120482 W CN2020120482 W CN 2020120482W WO 2021120797 A1 WO2021120797 A1 WO 2021120797A1
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WO
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Prior art keywords
voltage
power supply
output
conversion circuit
converter
Prior art date
Application number
PCT/CN2020/120482
Other languages
English (en)
French (fr)
Inventor
赵东升
童建利
李闯鹏
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20902007.2A priority Critical patent/EP3982512A4/en
Publication of WO2021120797A1 publication Critical patent/WO2021120797A1/zh
Priority to US17/582,962 priority patent/US20220149651A1/en

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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
    • 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
    • H02J9/061—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 DC powered loads
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/08—Three-wire systems; Systems having more than three wires
    • H02J1/084—Three-wire systems; Systems having more than three wires for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • 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
    • 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
    • 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
    • H02J9/08—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 requiring starting of a prime-mover
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/32—Means for protecting converters other than automatic disconnection
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208—Arrangements for improving power factor of AC input
    • H02M1/425—Arrangements for improving power factor of AC input using a single converter stage both for correction of AC input power factor and generation of a high frequency AC output voltage
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/285—Single converters with a plurality of output stages connected in parallel
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33573—Full-bridge at primary side of an isolation transformer
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/10—The network having a local or delimited stationary reach
    • H02J2310/12—The local stationary network supplying a household or a building
    • H02J2310/16—The load or loads being an Information and Communication Technology [ICT] facility

Definitions

  • This application relates to the field of power electronics technology, and in particular to a power supply device and a power supply system.
  • the power supply mode is mostly uninterruptible power supply (UPS, uninterruptible power supply) power supply or high voltage direct current transmission (HVDC) powered by.
  • UPS uninterruptible power supply
  • HVDC high voltage direct current transmission
  • a typical distributed data center power supply architecture is two-way UPS, two-way HVDC or a hybrid of UPS and HVDC power supply.
  • each UPS or HVDC is equipped with a power module for each load to connect to the load to realize mutual backup.
  • two power supplies are each equipped with a power supply module before reaching the load to convert the voltage output by the power supply into the power supply voltage of the load.
  • These power supply modules increase the power supply.
  • the area of the device increases the cost of the system, and the cost of system maintenance is high. Therefore, the power supply mode of the existing distributed data center needs to be further improved.
  • the embodiments of the present application provide a power supply device and a power supply system, which are used to reduce the size of the power supply device and reduce the power supply cost.
  • an embodiment of the present application provides a power supply module, which includes a switching circuit and a conversion circuit.
  • the switching circuit includes a switch, a first input terminal, a second input terminal, and an output terminal.
  • the first input terminal of the switching circuit is used to receive the first voltage provided by the first power source, and the second input terminal of the switching circuit is used to receive The second voltage provided by the second power supply, the switch is used to control the output terminal of the switching circuit to connect with the first input terminal, or to control the output terminal of the switching circuit to connect with the second input terminal;
  • the conversion circuit includes an input terminal and an output terminal, the conversion circuit
  • the input terminal of the switching circuit is connected with the output terminal of the switching circuit, and the output terminal of the switching circuit is connected with the electrical equipment.
  • the switching circuit is used to receive the first voltage or the second voltage, and convert the received first voltage or the second voltage into a third And output the third voltage through the output terminal of the conversion circuit.
  • the voltage value of the first voltage may be equal to the voltage value of the second voltage.
  • the first terminal of the switching circuit receives the first voltage
  • the second terminal of the switching circuit receives the second voltage
  • the output terminal of the switching circuit is directly connected to the input terminal of the switching circuit.
  • the output terminal of the switching circuit is connected to the first voltage of the switching circuit
  • the output terminal of the switching circuit is directly connected to the input terminal of the switching circuit.
  • the conversion circuit converts the first voltage or the second voltage output by the switching circuit into a third voltage (electric equipment The power supply voltage) after the power supply to the electrical equipment.
  • the first power supply or the second power supply for the electric equipment can be selected through a switching circuit, and a switching circuit can be used to convert the first voltage output by the first power supply or the second power supply output by the second power supply.
  • the voltage is converted to the supply voltage of the electrical equipment. Therefore, when powering electrical equipment through two power sources, only one power supply device is needed to convert the two AC power into the power supply voltage of the electrical equipment and supply power to the electrical equipment. Therefore, the cost of the power supply device can be reduced. Cost and volume.
  • the conversion circuit includes an AC converter; wherein the input end of the converter is the input end of the conversion circuit, and the output end of the converter is the output end of the conversion circuit.
  • the converter when the first voltage and the second voltage are direct current, the converter is used when the voltage value of the received first voltage is greater than the first preset voltage threshold or the voltage value of the received second voltage is greater than the first preset voltage threshold , The first voltage or the second voltage is converted into a third voltage, and the third voltage is output through the output terminal of the converter; or when the first voltage and the second voltage are alternating current, the converter is used for receiving the first voltage When the effective value of is greater than the first preset voltage threshold or the effective value of the second voltage is greater than the first preset voltage threshold, the first voltage or the second voltage is converted into a third voltage, and the third voltage is passed through the output terminal of the converter Output.
  • the power supply device provided in the first aspect can be directly connected to AC power sources such as mains, generators, etc., or connected to the output terminal of UPS, and the received first voltage or second voltage is converted into electrical equipment through a converter The DC supply voltage required to supply power to the electrical equipment.
  • the conversion circuit further includes a first energy storage device; wherein, the first energy storage device is connected to the output terminal of the converter; the first energy storage device can be used when the voltage value of the third voltage is greater than the first energy storage device.
  • the second threshold is preset, a part of the third voltage output by the converter is stored, and when the voltage value of the third voltage is less than or equal to the second preset voltage threshold, the stored voltage is output through the output terminal of the converter.
  • the conversion circuit when the voltage value of the third voltage is greater than the second preset voltage threshold, it can be determined that the first power supply or the second power supply is working normally, and the conversion circuit can normally output the third voltage for power consumption.
  • the voltage value of the third voltage is less than or equal to the second voltage threshold, it can be determined that the first power supply and the second power supply are faulty, and the output voltage of the output terminal of the conversion circuit cannot supply power to the electrical equipment.
  • you can The voltage stored in the first energy storage device is used to provide a short-term power supply for the electrical equipment, so as to realize the data backup of the electrical equipment, and to wait for the first power supply or the second power supply to return to normal.
  • the power supply device provided by the embodiment of the first aspect further includes: a second energy storage device independent of the conversion circuit; wherein the second energy storage device is connected to the output terminal of the conversion circuit.
  • the second energy storage device can be used to store a part of the voltage value of the third voltage output by the converter when the voltage value of the third voltage is greater than the third preset voltage threshold, and when the voltage value of the third voltage is less than or When it is equal to the second preset voltage threshold, the stored voltage is output through the output terminal of the converter.
  • the conversion circuit can normally output the third voltage for power consumption.
  • the voltage value of the third voltage is less than or equal to the second voltage threshold, it can be determined that the first power supply and the second power supply are faulty, and the third voltage output by the output terminal of the conversion circuit cannot supply power to the electrical equipment.
  • the voltage stored by the second energy storage device can be used to provide a short-term power supply for the electrical equipment to realize the data backup of the electrical equipment, and to wait for the first power supply or the second power supply to return to normal.
  • the conversion circuit further includes a first controller; wherein, the first controller can be used to control the converter to convert the first voltage or the second voltage into a third voltage, and the When the voltage value is less than or equal to the second preset voltage threshold, the first energy storage device is controlled to output the stored voltage through the output terminal of the converter.
  • the first power supply or the second power supply can be used to supply power to the electrical equipment, and when the first power supply and the second power supply are normal When the second power source fails, the first energy storage device supplies power to the electrical equipment.
  • the power supply device provided by the embodiment of the first aspect of the present application further includes a second controller; wherein, the second controller may be used to control the converter to convert the first voltage or the second voltage into a second controller. Three voltages, and when the voltage value of the third voltage is less than or equal to the third preset voltage threshold, the second energy storage device is controlled to output the stored voltage through the output terminal of the converter.
  • the first power supply or the second power supply can be used to supply power to the electrical equipment, and when the first power supply and the second power supply are normal When the second power source fails, the second energy storage device supplies power to the electrical equipment.
  • the first energy storage device may include any one of the following: a lead-carbon battery, a lithium iron phosphate battery, a ternary lithium battery, a sodium-sulfur battery, a graphene battery, a capacitor, or a flow battery.
  • the second energy storage device may include any one of the following: a lead-carbon battery, a lithium iron phosphate battery, a ternary lithium battery, a sodium-sulfur battery, a graphene battery, a capacitor, or a flow battery.
  • the switch may include a power semiconductor device or a mechanical switching device.
  • an embodiment of the present application further provides a power supply system, which includes a first power supply, a second power supply, and the power supply devices provided in the above-mentioned multiple first aspects and any one of their possible designs.
  • the first power supply is connected to a first input end of each power supply device of the plurality of power supply devices, and the first power supply is used for supplying power to the multiple power supply devices.
  • the second power supply is connected to a second input end of each of the multiple power supply devices, and the second power supply is used to supply power to the multiple power supply devices.
  • multiple power supply devices are connected to multiple electrical equipment in a one-to-one correspondence, and the multiple power supply devices are used to supply power to the multiple electrical devices.
  • Figure 1 is a schematic diagram of the structure of a power supply system
  • FIG. 2 is a first structural diagram of a power supply device provided by an embodiment of the application.
  • FIG. 3 is a schematic structural diagram of a switching circuit provided by an embodiment of the application.
  • FIG. 4 is a first structural diagram of a conversion circuit provided by an embodiment of the application.
  • FIG. 5 is a second structural diagram of a conversion circuit provided by an embodiment of the application.
  • FIG. 6 is a second structural diagram of a power supply device provided by an embodiment of this application.
  • FIG. 7 is a third structural diagram of a power supply device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a power supply system provided by an embodiment of the application.
  • the embodiments of the present application can be applied to a power supply architecture that supplies power to a load, such as a distributed data center system.
  • a power supply structure of the current distributed data center system.
  • the power supply structure shown in Fig. 1 includes multiple power supply modules for supplying power to multiple electrical devices.
  • each electric device is configured with two power modules, and the two power modules are respectively connected to a power source, and are used to convert the voltage output by the connected power source into the power supply voltage of the electric device and provide it to the connected electric device. Therefore, when one of the power sources fails, the electrical equipment can also obtain the power supply voltage through the power module connected to the other power source and work normally, so as to improve the reliability of power supply.
  • the power supply structure shown in Figure 1 can be implemented to supply power to electrical equipment, in the power supply process, the electrical equipment in Figure 1 is equipped with two power modules to achieve dual power supply. Therefore, the output voltage of the two power supplies is equal to The utilization rate is low, and the two power modules occupy a larger volume in the power supply occasion, which will inevitably lead to problems such as high system cost and high system maintenance cost.
  • the embodiments of the present application provide a power supply device and a power supply system to reduce the volume of the power supply device and reduce the power supply cost.
  • connection involved in this application describes the connection relationship between two objects. For example, A and B are connected, which can mean: A and B are directly connected, and A is connected through C and B. Happening.
  • the power supply device 200 includes: a switching circuit 201 and a conversion circuit 202; wherein, the switching circuit 201 includes a switch, a first input terminal, a second input terminal, and an output terminal, and the first input terminal of the switching circuit 201 is used to receive the first input terminal.
  • the first voltage provided by a power supply, the second input terminal of the switching circuit 201 is used to receive the second voltage provided by the second power supply, and the switch is used to control the output terminal of the switching circuit 201 to connect with the first input terminal, or to control the switching circuit 201
  • the output end of the conversion circuit 202 is connected to the second input end; the conversion circuit 202 includes an input end and an output end, the input end of the conversion circuit 202 is connected to the output end of the switching circuit 201, and the output end of the conversion circuit 202 is used to connect to electrical equipment,
  • the conversion circuit 202 is configured to receive the first voltage or the second voltage, convert the received first voltage or the second voltage into a third voltage, and output the third voltage to the electric device through the output terminal of the conversion circuit 202.
  • the first power source and the second power source may include AC power sources such as commercial power and generators, while the first power source and the second power source may also include UPS, which is not specifically limited in this application.
  • the voltage value of the first voltage may be equal to the voltage value of the second voltage.
  • the first input terminal of the switching circuit 201 is used to receive the first voltage
  • the second input terminal of the switching circuit 201 is used to receive the second voltage
  • the output terminal of the switching circuit 201 is directly connected to the input terminal of the conversion circuit 202.
  • the switching circuit 202 outputs the switching circuit 201
  • the first voltage or the second voltage is converted into the third voltage and then output to the electric equipment to supply power to the electric equipment.
  • the positive and negative directions of the first voltage and the second voltage may be the same.
  • the positive and negative directions of the first voltage and the second voltage are the same.
  • the specific meaning can be: if the output terminal of the switching circuit 201 is connected to the first input terminal of the switching circuit 201, the end of the first input terminal receiving the high level is connected with The end of the output terminal that outputs high level is connected, and the end of the first input terminal that receives the low level is connected to the end of the output terminal that outputs low level; if the output terminal of the switching circuit 201 is connected to the second input terminal of the switching circuit 201 In connection, the end of the second input terminal that receives the high level is connected to the end of the output terminal that outputs the high level, and the end of the second input terminal that receives the low level is connected to the end of the output terminal that outputs the low level.
  • the power supply device 200 can be fixed in a power distribution cabinet.
  • the power distribution cabinet is provided with multiple fixed interfaces.
  • the electrical equipment can be connected to the power supply device through the fixed interfaces on the power distribution cabinet. 200 connections.
  • the power plugs of devices such as mobile phones, navigation, televisions, and notebooks can be directly inserted into the fixed interface, so that the power supply device 200 can supply power to devices such as mobile phones and notebooks.
  • the power supply device 200 can also be arranged in a flexible and detachable form, the power supply device 200 is fixed on the electrical equipment, and the power supply device 200 can be connected to the electrical equipment through a wire.
  • the power supply device 200 and the electrical equipment can be regarded as a whole device.
  • the conversion circuit 202 may be composed of switching tubes, diodes, inductors, capacitors and other devices.
  • the working state of the conversion circuit 202 can be realized by adjusting the working state of these devices (for example, a switch tube).
  • the specific structures of the switching circuit 201 and the switching circuit 202 in the power supply device 200 are described below.
  • the switching circuit 201 includes a switch, a first input terminal, a second input terminal, and an output terminal.
  • the first input terminal of the switching circuit 201 is used to receive the first AC power provided by the first power source
  • the second input terminal of the switching circuit 201 is used to receive the second AC power provided by the second power source
  • the switch is used to control the switching circuit 201
  • the output terminal is connected to the first input terminal, or the output terminal of the control switching circuit 201 is connected to the second input terminal.
  • the switch may include a power semiconductor device or a mechanical device.
  • the switch may include a first switch and a second switch.
  • the first terminal of the first switch is connected to the first input terminal of the switching circuit 201
  • the first terminal of the second switch is connected to the second input terminal of the switching circuit 201
  • the second terminal of the first switch is connected to the second input terminal of the second switch.
  • the second terminals are all connected to the output terminal of the switching circuit 201.
  • the closing or opening of the first switch and the second switch can directly control the output terminal of the switching circuit 201 to output the first alternating current or output the second alternating current.
  • the output terminal of the switching circuit 201 outputs the first voltage or the second voltage, that is, only one of the power supplies is required to provide electrical energy for the conversion circuit 202.
  • the first switch is closed and the first power supply has no fault, the output terminal of the switching circuit 201 outputs the first voltage. If the first power supply fails, the first switch can be opened and the second switch can be closed.
  • the output terminal of the switching circuit 201 outputs the second voltage.
  • the power supply device 200 supplies power to the electric equipment, only one power supply is needed to supply the electric equipment at the same time. Therefore, the electric energy utilization rate of the first voltage output by the first power supply and the second voltage output by the second power supply can be improved.
  • the first switch and the second switch may be linked switches.
  • the switch may include a double pole double throw switch. Wherein, when the double-pole double-throw switch is in the first position, the first input terminal of the switching circuit 201 is connected to the output terminal of the switching circuit 201; when the double-pole double-throw switch is in the second position, the second input of the switching circuit 201 is The terminal is connected to the output terminal of the switching circuit 201.
  • K can be regarded as a double-pole double-throw switch, and K forms a switch.
  • A can be regarded as the first terminal of the first input terminal of the switching circuit 201
  • B can be regarded as the second terminal of the first input terminal of the switching circuit 201, and A and B are respectively connected to the two output terminals of the first power supply.
  • C can be regarded as the first terminal of the second input terminal of the switching circuit 201
  • D can be regarded as the second terminal of the second input terminal of the switching circuit 201, and C and D are respectively connected to the two output terminals of the second power supply.
  • E can be regarded as the first terminal of the output terminal of the switching circuit 201
  • F can be regarded as the second terminal of the output terminal of the switching circuit 201, and E and F are connected to the two terminals of the input terminal of the conversion circuit 202.
  • a and B are used as the first single-phase input terminal to receive the first voltage provided by the first power supply
  • C and D are used as the second single-phase input terminal to receive the first voltage.
  • Receiving the second voltage provided by the second power supply, E and F are used as output terminals to output the third voltage, and energy is transmitted from left to right, and one of the two single-phase AC or DC input from the left is output.
  • the above description of the structure of the switching circuit 201 is only an example.
  • the switching circuit 201 may also adopt other structures, for example, a structure of two contactors may be adopted, which is not described in detail here in this application.
  • the conversion circuit 202 includes an input terminal and an output terminal. Wherein, the input end of the conversion circuit 202 is connected to the output end of the switching circuit 201, and the output end of the conversion circuit 202 is used to connect to the electrical equipment.
  • the specific structure of the conversion circuit 202 is given below.
  • the conversion circuit 202 includes a converter.
  • the input terminal of the converter is the input terminal of the conversion circuit 202, and the output terminal of the converter is the output terminal of the conversion circuit 202.
  • the function of setting the converter is: when the first voltage and the second voltage are direct current, the converter is used to receive the voltage value of the first voltage greater than the first preset voltage threshold or the voltage value of the received second voltage greater than When the first preset voltage threshold, the first voltage or the second voltage is converted into a third voltage, and the third voltage is output through the output terminal of the converter; or when the first voltage and the second voltage are alternating current, the converter uses When the effective value of the received first voltage is greater than the first preset voltage threshold or the effective value of the second voltage is greater than the first preset voltage threshold, the first voltage or the second voltage is converted into a third voltage, and the third The voltage is output through the output terminal of the converter.
  • the first preset voltage threshold is 5V, of course, it can also be set to 0V, which is not described in detail here in this application.
  • the conversion circuit 202 may further include a first energy storage device, which is connected to the output terminal of the converter; wherein, the first energy storage device may be used when the voltage value of the third voltage is greater than When the second preset voltage threshold is used, a part of the third voltage output by the converter is stored, and when the voltage value of the third voltage is less than or equal to the second preset voltage threshold, the stored direct current is passed through the output terminal of the converter Output to electrical equipment.
  • the first energy storage device may include any one of the following: a lead-carbon battery, a lithium iron phosphate battery, a ternary lithium battery, a sodium-sulfur battery, a graphene battery, a capacitor, or a flow battery.
  • the second preset voltage threshold may be 5V, of course, it may also be set to 0V, which is not described in detail here in this application.
  • the output terminal of the conversion circuit 202 can be connected to a second energy storage device, which is independent of the conversion circuit 202; wherein the second energy storage device is connected to the output terminal of the conversion circuit 202 .
  • the second energy storage device can be used to store part of the direct current output from the conversion circuit 202 when the voltage value of the third voltage is greater than the third preset voltage threshold, and when the voltage value of the third voltage is less than or equal to the first 3.
  • the voltage threshold is preset, the stored direct current is output to the electrical equipment through the output terminal of the conversion circuit 202.
  • the third preset voltage threshold may be 5V, of course, it may also be set to 0V, which is not described in detail here in this application.
  • the second energy storage device may also be connected to an external DC power supply for long-term failure of the first power supply and the second power supply. Meet the demand for electrical energy of electrical equipment.
  • the specific structure of the converter is given below.
  • the converter may include: a first H-bridge rectifier circuit, an isolation transformer, and a second H-bridge rectifier circuit; wherein the primary winding of the isolation transformer is coupled with the first H-bridge rectifier circuit, and the secondary winding of the isolation transformer is coupled to the second H-bridge The rectifier circuit is coupled.
  • the first H-bridge rectifier circuit can be composed of switching tubes for regulating the first voltage and the second voltage; the second H-bridge rectifier circuit can also be composed of switching tubes for regulating the first voltage. The voltage and the second voltage are rectified, and the third voltage is output.
  • the converter can adopt the existing structure, that is, it is composed of two H-bridge rectifier circuits and an isolation transformer.
  • the intermediate node of the first bridge arm and the intermediate node of the second bridge arm of the first H-bridge rectifier circuit can be used as the two end points of the input end of the switching circuit 202, and are connected to the two end points of the output end of the switching circuit 201.
  • the intermediate node of the first bridge arm and the intermediate node of the second bridge arm of the two H-bridge rectifier circuits can be used as the two end points of the output end of the conversion circuit 202 for connecting with the positive and negative lines of the electrical equipment (at this time, the conversion circuit
  • the voltage across the input terminal of 202 is the first voltage or the second voltage, and the voltage across the output terminal of the conversion circuit 202 is the third voltage).
  • the first voltage and the second voltage can be adjusted and rectified, and the power supply can be isolated from the electrical equipment.
  • the conversion circuit 202 further includes an inductor.
  • the inductor and the first H-bridge rectifier circuit form a power factor correction (PFC) circuit, wherein the inductor is connected across the input terminal of the first H-bridge rectifier circuit and the conversion circuit 202.
  • PFC power factor correction
  • FIG. 4 for a schematic structural diagram of a conversion circuit 202 provided by an embodiment of the application.
  • a and B are input terminals
  • C and D are output terminals
  • MOS transistors Q1Q2/Q3/Q4 form the first H-bridge rectifier circuit
  • MOS transistors Q5/Q6/Q7/Q8 form the second H-bridge rectifier circuit
  • L, C1 and T form an isolation transformer.
  • L and T can be a separate structure, or a magnetic integration method can be used.
  • a and B are used as input terminals for receiving the first voltage or the second voltage output by the switching circuit 201, and C and D are used as output terminals for connecting with the electrical equipment.
  • the third voltage is output to realize power supply for the electric equipment.
  • the conversion circuit 202 may also include a second controller, which is connected to the switch tube in the conversion circuit 202 and can be used to control the conversion.
  • the converter converts the first voltage or the second voltage into a third voltage, and when the voltage value of the third voltage is less than or equal to the third preset voltage threshold, controls the second energy storage device to pass the stored direct current through the output terminal of the converter Output.
  • the second controller can be connected to the gate of the MOS transistor to control the on and off of the MOS transistor. This enables the power supply device 200 to supply power to the electrical equipment; if the switches in the circuits of the conversion circuit 202 are bipolar junction transistors (BJT), the second controller can be connected to the base of the BJT and pass Controlling the on and off of the BJT enables the power supply device 200 to supply power to the electrical equipment.
  • MOS metal oxide semiconductor
  • BJT bipolar junction transistors
  • the switching circuit 201 can be controlled to output the first voltage or the second voltage by controlling the on and off of the switch tube included in the switching circuit 201.
  • the second controller may be any one of a microcontroller unit (MCU), a central processing unit (CPU), and a digital signal processor (digital signal processor, DSP).
  • MCU microcontroller unit
  • CPU central processing unit
  • DSP digital signal processor
  • the specific form of the second controller is not limited to the above examples.
  • FIG. 5 for a schematic structural diagram of another conversion circuit 202 provided by an embodiment of the application.
  • a and B are input terminals
  • C and D are output terminals
  • MOS transistors Q1/Q2/Q3/Q4 form the first H-bridge rectifier circuit
  • MOS transistors Q5/Q6/Q7/Q8 form the second H-bridge
  • L, C1 and T form an isolation transformer
  • E can be regarded as the first energy storage device.
  • L and T can be a separate structure, or a magnetic integration method can be used.
  • a and B are used as input terminals for receiving the first voltage or the second voltage output by the switching circuit 201, and C and D are used as output terminals for connecting with the electrical equipment.
  • the third voltage is output to realize power supply for the electric equipment.
  • the conversion circuit 202 adopts the above structure. In addition to realizing the voltage conversion of AC power into DC power and DC power, it can also obtain high power factor and low current harmonics by controlling the on and off of the switch tube in the conversion circuit 202.
  • the conversion circuit 202 may also include a first controller, which is connected to the switch tube in the conversion circuit 202 and can be used to control the conversion.
  • the converter converts the first voltage or the second voltage into a third voltage, and when the voltage value of the third voltage is less than or equal to the third preset voltage threshold, controls the first energy storage device to pass the stored direct current through the output terminal of the converter Output.
  • the first controller can be connected to the gate of the MOS transistor, so that the power supply device 200 can supply power to the electrical equipment by controlling the on and off of the MOS transistor; If the switch tube in each circuit of the conversion circuit 202 is a BJT, the first controller can be connected to the base of the BJT, so that the power supply device 200 can supply power to the electrical equipment by controlling the on and off of the BJT.
  • the conversion circuit 202 may also include a first controller for storing a part of the DC power output by the converter when the voltage value of the third voltage is greater than the third preset voltage threshold, and When the voltage value of the third voltage is less than or equal to the third preset voltage threshold, the stored direct current is output through the output terminal of the converter, and at this time, the power supply device 200 supplies power to the electrical equipment.
  • the first controller may be connected to the gate of the MOS tube, and the power supply device 200 can realize power supply for the electric equipment by controlling the on and off of the MOS tube; If the switch tube in each circuit of the power supply device 200 is a BJT, the controller can be connected to the base of the BJT, so that the power supply device 200 can supply power to the electrical equipment by controlling the on and off of the BJT.
  • the switching circuit 201 can be controlled to output the first voltage or the second voltage by controlling the on and off of the switch tube included in the switching circuit 201.
  • the first controller may be any one of a micro control unit MCU, a central processing unit CPU, and a digital signal processor DSP.
  • the specific form of the first controller is not limited to the above examples.
  • a power supply device provided by an embodiment of the present application may be as shown in FIG. 6, and the power supply device 600 includes a switching circuit 601, a conversion circuit 602, and a second energy storage device 603.
  • a double-pole double-throw switch K is included in the switching circuit 601.
  • the double-pole double-throw switch K when the double-pole double-throw switch K is in the first position, the first end of K is connected to A, the second end of K is connected to B, and when K is in the second position, the first end of K is connected to C, The second end of K is connected to D.
  • A is the first terminal of the output terminal of the first power supply
  • B is the second terminal of the output terminal of the first power supply
  • C is the first terminal of the output terminal of the second power supply
  • D is the second terminal of the output terminal of the second power supply. Endpoint.
  • the conversion circuit 602 includes an inductor L and switch tubes Q1/Q2/Q3/Q4/Q5/Q6/Q7/Q8. Among them, the drain of Q1 is connected to the first end of K, the source of Q2 is connected to the second end of K, the drain of Q7 can be connected to the positive terminal of the electrical device, and the source of Q8 can be connected to the electrical device. The negative terminal is connected.
  • the second energy storage device 603 includes a DC battery V1, the positive terminal of the DC battery can be connected to the drain of Q7, and the negative terminal of the DC battery can be connected to the source of Q8.
  • the gates of the above switch tubes are all connected to an external control circuit (or a second controller), and the control circuit realizes the conversion of the first voltage or the second voltage received by the conversion circuit 602 into a third voltage (using The power supply voltage of electrical equipment).
  • the second controller may be provided inside the conversion circuit 602, or may be independent of the conversion circuit 602, which is not specifically limited in this application.
  • the first power supply and the second power supply are connected to the switching circuit 601 after the switching circuit 601 is connected to the switching circuit 602, and K is used as the first input terminal of the power supply device 600 for receiving the first voltage or the second voltage output by the first power supply.
  • the switching circuit 601 selects the voltage output by one of the two power supplies (the first power supply or the second power supply) and outputs the voltage output to the conversion circuit 602.
  • the conversion circuit 602 is used to transfer the voltage output by the switching circuit 601 ( The first voltage or the second voltage) is converted into a third voltage.
  • the output terminals E and F of the conversion circuit 602 are used as the output terminals of the power supply device 600 to be connected to the electrical equipment and used to output the third voltage to supply power to the electrical equipment.
  • the power supply device 600 because in the process of supplying power to the electrical equipment, only one of the two power sources supplies power to the electrical equipment, and one power supply device 600 can achieve the second output of the two power sources.
  • the first voltage and the second voltage are converted into the power supply voltage of the electrical equipment. Therefore, when two power sources are used to supply power to the electrical equipment, only one power supply device 600 is needed to convert the voltage output by the two power sources into the power supply voltage of the electrical equipment, and to supply power to the electrical equipment, which can effectively reduce The cost and volume of the power supply device 600.
  • any one of the first power source and the second power source can be used as the power source.
  • the power supply or the second power supply fails, another power supply can be converted to the power supply.
  • the DC power stored in the second energy storage device 603 can be provided to the electrical equipment at this time, so as to improve the power supply reliability of the power supply device 600.
  • the second energy storage device 603 may be connected to a DC power source, and is used to ensure that the electrical equipment can work normally when the first power source and the second power source are in a fault state for a long time, so as to improve power supply reliability.
  • FIG. 7 another power supply device provided by an embodiment of the present application may be as shown in FIG. 7, and the power supply device 700 includes a switching circuit 701 and a conversion circuit 702.
  • a double-pole double-throw switch K is included in the switching circuit 701.
  • the double-pole double-throw switch K when the double-pole double-throw switch K is in the first position, the first end of K is connected to A, the second end of K is connected to B, and when K is in the second position, the first end of K is connected to C, The second end of K is connected to D.
  • A is the first terminal of the output terminal of the first power supply
  • B is the second terminal of the output terminal of the first power supply
  • C is the first terminal of the output terminal of the second power supply
  • D is the second terminal of the output terminal of the second power supply. Endpoint.
  • the conversion circuit 702 includes an inductor L, a switch tube S1/S2/S3/S4, and a first energy storage device V2.
  • the drain of Q1 is connected to the first terminal of K
  • the source of Q2 is connected to the second terminal of K
  • the drain of Q7 is connected to the positive terminal of the electrical device
  • the source of Q8 is connected to the negative terminal of the electrical device.
  • the terminals are connected, the positive terminal of V2 is connected to the drain of Q7, and the negative terminal of V2 is connected to the source of Q8.
  • the gates of the above switch tubes are all connected to an external control circuit (or the first controller), and the control circuit realizes the function of converting the AC power received by the AC to DC conversion circuit 702 into DC power by controlling the on and off of the switching tubes.
  • the first controller may be provided inside the conversion circuit 702, or may be independent of the conversion circuit 702, which is not specifically limited in this application.
  • the first power supply and the second power supply are connected to the switching circuit 701 after the switching circuit 701 is connected to the switching circuit 702, and K is used as the first input terminal of the power supply device 700 for receiving the first voltage or the second voltage output by the first power supply.
  • the switching circuit 701 selects one of the two power supplies (the first power supply and the second power supply) and outputs it to the conversion circuit 702.
  • the conversion circuit 702 is used to receive the voltage output by the switching circuit 701 (the A voltage or a second voltage) is converted to a third voltage.
  • the output terminals E and F of the conversion circuit 702 are used as the output terminals of the power supply device 700, and are used to connect with the electric equipment, and are used to output the third voltage to supply power to the electric equipment.
  • the power supply device 700 because in the process of supplying power to the electrical equipment, only one of the two power sources supplies power to the electrical equipment, and one power supply device 700 can realize the second output of the two power sources.
  • the first voltage and the second voltage are converted into the power supply voltage of the electrical equipment. Therefore, when two power sources are used to supply power to the electrical equipment, only one power supply device 700 is needed to convert the voltage output by the two power sources into the power supply voltage of the electrical equipment, and to supply power to the electrical equipment, which can effectively reduce The cost and volume of the power supply device 700.
  • any one of the first power source and the second power source can be used as the power source.
  • the power supply or the second power supply fails, another power supply can be converted to the power supply.
  • the DC power stored in the first energy storage device V2 can be provided to the electrical equipment at this time, so as to improve the power supply reliability of the power supply device 700.
  • the use of the power supply device provided in the embodiments of the present application can not only reduce the volume of the power supply device, but also reduce the cost of the power supply device when powering electric equipment.
  • the embodiment of the present application also provides a power supply system.
  • the power supply system 800 may include a first power supply 801, a second power supply 802 and a plurality of the aforementioned power supply devices 200.
  • the first power supply 801 is connected to the first input end of each power supply device 200 in the plurality of power supply devices 200, and the first power supply 801 is used to supply power for the multiple power supply devices 200.
  • the second power supply 802 is connected to the second input end of each power supply device 200 of the multiple power supply devices 200, and the second power supply 802 is used to supply power for the multiple power supply devices 200.
  • multiple power supply devices 200 are connected to multiple power-consuming devices in a one-to-one correspondence, and multiple power supply devices 200 are used to supply power to the multiple power-consuming devices.
  • the power supply system 800 is connected between two power supply sources and the electrical equipment in a distributed data center system, and the power supply system 800 is used to supply power to the electrical equipment through the voltage output by the power supply.
  • the power supply may include any one of the following: mains, generator or UPS.
  • the power supply system 800 is connected between two power supply sources and the server, and the power supply system 800 is used to supply power to the server through a voltage output by the power supply.

Abstract

本申请实施例公开了一种供电装置和供电系统，用以减小供电装置的体积和成本。该供电装置包括：切换电路，切换电路包括切换器、第一输入端、第二输入端以及输出端，切换电路的第一输入端用于接收第一电源提供的第一电压，切换电路的第二输入端用于接收第二电源提供的第二电压，切换器用于控制切换电路的输出端与第一输入端连接，或者控制切换电路的输出端与第二输入端连接；转换电路，转换电路包括输入端和输出端，转换电路的输入端与切换电路的输出端连接，且转换电路的输出端与用电设备连接，转换电路用于接收第一电压或者第二电压，将接收的第一电压或者第二电压转换为第三电压，并将第三电压通过转换电路的输出端输出。

Description

一种供电装置和供电系统
相关申请的交叉引用
本申请要求在2019年12月19日提交中国专利局、申请号为201911320318.7、申请名称为“一种供电装置和供电系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电力电子技术领域，尤其涉及一种供电装置和供电系统。
背景技术
分布式数据中心机房对供电可靠性要求非常高，每一个用电设备通常需要配置双路电源进行供电，其供电方式多采用不间断电源(UPS，uninterruptible power supply)供电或者高压直流输电(HVDC)供电。
典型的分布式数据中心供电架构为两路UPS、两路HVDC或者UPS与HVDC混合供电。针对数据中心机房中的负载，每个UPS或HVDC为每一个负载均配置了一个电源模块与负载连接，实现彼此相互备份。由此可知，现有技术中对供电要求高的应用场合，两路电源在达到负载之前分别配置了一个电源模块，用于将电源输出的电压转换为负载的供电电压，这些电源模块增加了供电装置的占地面积，增加系统造价高，且系统维护成本高。因此，现有的分布式数据中心的供电方式还有待进一步提升。
发明内容
本申请实施例提供一种供电装置和供电系统，用以减小供电装置的体积以及降低供电成本。
第一方面，本申请实施例提供一种供电模块，该供电模块包括：切换电路和转换电路。其中，切换电路包括切换器、第一输入端、第二输入端以及输出端，切换电路的第一输入端用于接收第一电源提供的第一电压，切换电路的第二输入端用于接收第二电源提供的第二电压，切换器用于控制切换电路的输出端与第一输入端连接，或者控制切换电路的输出端与第二输入端连接；转换电路包括输入端和输出端，转换电路的输入端与切换电路的输出端连接，且转换电路的输出端与用电设备连接，转换电路用于接收第一电压或者第二电压，将接收的第一电压或者第二电压转换为第三电压，并将第三电压通过转换电路的输出端输出。
其中，第一电压的电压值可以与第二电压的电压值相等。具体地，切换电路的第一端接收第一电压，切换电路的第二端接收第二电压，切换电路的输出端直接与转换电路的输入端连接，当切换电路的输出端连接切换电路的第一输入端或者切换电路的第二输入端时，切换电路的输出端输出的电压的电压值均相等，转换电路将切换电路输出的第一电压或者第二电压转换为第三电压(用电设备的供电电压)后给用电设备供电。
采用第一方面提供的供电装置，可以通过切换电路选择为用电设备供电的第一电源或 者第二电源，并利用一个转换电路将第一电源输出的第一电压或者第二电源输出的第二电压转换为用电设备的供电电压。因此，在通过两路电源为用电设备供电时，只需要一个供电装置即可实现将两路交流电转换为用电设备的供电电压，并为用电设备供电，因此，可以减小供电装置的成本和体积。
在一种可能的设计中，转换电路包括交转换器；其中，转换器的输入端为转换电路的输入端，转换器的输出端为转换电路的输出端。其中，当第一电压和第二电压为直流电时，转换器用于在接收的第一电压的电压值大于第一预设电压阈值或者接收的第二电压的电压值大于第一预设电压阈值时，将第一电压或者第二电压转换为第三电压，并将第三电压通过转换器的输出端输出；或者当第一电压和第二电压为交流电时，转换器用于在接收的第一电压的有效值大于第一预设电压阈值或者第二电压的有效值大于第一预设电压阈值时，将第一电压或者第二电压转换为第三电压，将第三电压通过转换器的输出端输出。
采用第一方面提供的供电装置，可以直接与市电、发电机等交流电源连接，也可以与UPS的输出端连接，并通过转换器将接收的第一电压或者第二电压转换为用电设备需求的直流供电电压，从而为用电设备供电。
在一种可能的设计中，转换电路还包括第一储能装置；其中，第一储能装置与转换器的输出端连接；第一储能装置可以用于在第三电压的电压值大于第二预设阈值时，将转换器输出的第三电压的一部分进行存储，以及在第三电压的电压值小于或等于第二预设电压阈值时，将存储的电压通过转换器的输出端输出。
采用第一方面提供的供电装置，在第三电压的电压值大于第二预设电压阈值时，可以确定第一电源或者第二电源正常工作，此时转换电路可以正常输出第三电压为用电设备供电，当第三电压的电压值小于或等于第二电压阈值，则可以确定第一电源和第二电源发生故障，转换电路的输出端输出的电压无法为用电设备供电，此时，可以通过第一储能装置存储的电压为用电设备进行一个短期的供电，以实现用电设备的数据备份，以及等待第一电源或者第二电源恢复正常。
在一种可能的设计中，第一方面实施例提供的供电装置还包括：独立于转换电路的第二储能装置；其中，第二储能装置与转换电路的输出端连接。第二储能装置可以用于在第三电压的电压值大于第三预设电压阈值时，将转换器输出的第三电压的电压值的一部分进行存储，以及在第三电压的电压值小于或者等于第二预设电压阈值时，将存储的电压通过转换器的输出端输出。
采用第一方面提供的供电装置，在第三电压的电压值大于第三预设电压阈值时，可以确定第一电源或者第二电源正常工作，此时转换电路可以正常输出第三电压为用电设备供电，当第三电压的电压值小于或等于第二电压阈值，则可以确定第一电源和第二电源发生故障，转换电路的输出端输出的第三电压无法为用电设备供电，此时，可以通过第二储能装置存储的电压为用电设备进行一个短期的供电，以实现用电设备的数据备份，以及等待第一电源或者第二电源恢复正常。
在一种可能的设计中，转换电路还包括第一控制器；其中，该第一控制器可以用于控制转换器将第一电压或者第二电压转换为第三电压，以及在第三电压的电压值小于或者等于第二预设电压阈值时，控制第一储能装置将存储的电压通过转换器的输出端输出。
采用第一方面提供的供电装置，在第一控制器的控制下，在第一电源或者第二电源正常时，可以通过第一电源或者第二电源为用电设备供电，以及在第一电源和第二电源发生 故障时，通过第一储能装置为用电设备供电。
在一种可能的设计中，本申请第一方面实施例提供的供电装置还包括第二控制器；其中，该第二控制器可以用于控制转换器将第一电压或者第二电压转换为第三电压，以及在第三电压的电压值小于或者等于第三预设电压阈值时，控制第二储能装置将存储的电压通过转换器的输出端输出。
采用第一方面提供的供电装置，在第一控制器的控制下，在第一电源或者第二电源正常时，可以通过第一电源或者第二电源为用电设备供电，以及在第一电源和第二电源发生故障时，通过第二储能装置为用电设备供电。
在一种可能的设计中，第一储能装置可以包括以下的任意一种：铅碳电池、磷酸铁锂电池、三元锂电池、钠硫电池、石墨烯电池、电容器或液流电池。
在一种可能的设计中，第二储能装置可以包括以下的任意一种：铅碳电池、磷酸铁锂电池、三元锂电池、钠硫电池、石墨烯电池、电容器或液流电池。
在一种可能的设计中，切换器可以包括功率半导体器件或者机械切换器件。
第二方面，本申请实施例还提供一种供电系统，该供电系统包括第一电源、第二电源以及上述多个第一方面及其任一可能的设计中提供的供电装置。
可选地，第一电源与多个供电装置中每一个供电装置的第一输入端连接，第一电源用于为多个供电装置供电。
可选地，第二电源与多个供电装置中每一个供电装置的第二输入端连接，第二电源用于为多个供电装置供电。
可选地，多个供电装置与多个用电设备一一对应连接，多个供电装置用于为多个用电设备供电。
附图说明
图1为一种供电系统的结构示意图；
图2为本申请实施例提供的供电装置的结构示意图一；
图3为本申请实施例提供的一种切换电路的结构示意图；
图4为本申请实施例提供的转换电路的结构示意图一；
图5为本申请实施例提供的转换电路的结构示意图二；
图6为本申请实施例提供的供电装置的结构示意图二；
图7为本申请实施例提供的供电装置的结构示意图三；
图8为本申请实施例提供的一种供电系统的结构示意图。
具体实施方式
下面将结合附图对本申请实施例作进一步详细描述。
首先介绍本申请实施例可以应用的场景，本申请实施例可以应用于为负载供电的供电架构中，比如分布式数据中心系统等。如图1所示，为目前分布式数据中心系统的一种可能的供电结构，如图1所示，图1所示的供电结构包括多个电源模块，用于为多个用电设备供电。具体地，每个用电设备均配置有两个电源模块，两个电源模块分别连接一路电源，用于将连接的电源输出的电压转换为用电设备的供电电压后提供给连接的用电设备，从而 实现当其中一路电源发生故障时，用电设备也可以通过与另一路电源连接的电源模块获取到供电电压并正常工作，以提高供电可靠性。
图1所示的供电结构虽然可以实现为用电设备供电，但在供电过程中，图1中用电设备均配置有两个电源模块，实现双路电源供电，因此，两个电源输出电压的利用率较低，且两个电源模块要占用供电场合较大的体积，势必导致系统造价高，且系统维护成本高等问题。
因此，上述供电装置存在体积大和成本高的问题。本申请实施例提供一种供电装置和供电系统，用以减小供电装置的体积以及减小供电成本。
需要说明的是，本申请中所涉及的多个，是指两个或两个以上。本申请中所涉及术语“连接”，描述两个对象的连接关系，可以表示两种连接关系，例如，A和B连接，可以表示：A与B直接连接，A通过C和B连接这两种情况。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
参见图2，为本申请实施例提供的一种供电装置的结构示意图。其中，该供电装置200包括：切换电路201和转换电路202；其中，切换电路201包括切换器、第一输入端、第二输入端以及输出端，切换电路201的第一输入端用于接收第一电源提供的第一电压，切换电路201的第二输入端用于接收第二电源提供的第二电压，切换器用于控制切换电路201的输出端与第一输入端连接，或者控制切换电路201的输出端与第二输入端连接；转换电路202包括输入端和输出端，转换电路202的输入端与切换电路201的输出端连接，且转换电路202的输出端用于与用电设备连接，转换电路202用于接收第一电压或者第二电压，并将接收的第一电压或者第二电压转换为第三电压，并将第三电压通过转换电路202的输出端输出给用电设备。其中，第一电源和第二电源可以包括市电、发电机等交流电源，同时第一电源和第二电源也可以包括UPS，本申请这里不做具体限定。
其中，第一电压的电压值可以与第二电压的电压值相等。具体地，切换电路201的第一输入端用于接收第一电压，切换电路201的第二输入端用于接收第二电压，切换电路201的输出端直接与转换电路202的输入端连接，当切换电路201的输出端连接切换电路201的第一输入端或者连接切换电路201的第二输入端时，切换电路201的输出端输出的电压的电压值均相同，转换电路202将切换电路201输出的第一电压或者第二电压转换为第三电压后输出给用电设备，以对用电设备进行供电。
更进一步地，第一电压和第二电压的正负方向可以相同。第一电压和第二电压的正负方向相同，其具体含义可以是：若切换电路201的输出端与切换电路201的第一输入端连接时，第一输入端中接收高电平的一端与输出端中输出高电平的一端连接，第一输入端中接收低电平的一端与输出端中输出低电平的一端连接；若切换电路201的输出端与切换电路201的第二输入端连接，第二输入端中接收高电平的一端与输出端中输出高电平的一端连接，第二输入端中接收低电平的一端与输出端中输出低电平的一端连接。
实际应用中，以分布式数据中心系统为例，供电装置200可以固定在配电柜中，该配电柜中设置有多个固定接口，用电设备可以通过配电柜上的固定接口与供电装置200连接。示例性地，手机、导航、电视、笔记本等设备的电源插头可以直接插入该固定接口，从而实现供电装置200为手机、笔记本等设备供电。在另一种实现方式中，供电装置200也可以设置成灵活可拆卸的形式，供电装置200固定在用电设备上，供电装置200可以通过导 线与用电设备连接。在这种情况下，供电装置200与用电设备可以视为一个整体装置。
具体实现时，转换电路202可以由开关管、二极管、电感、电容等器件组成。转换电路202的工作状态可以通过调节这些器件(例如开关管)的工作状态来实现。
下面对供电装置200中的切换电路201和转换电路202的具体结构进行介绍。
一、切换电路201
切换电路201包括切换器、第一输入端、第二输入端以及输出端。其中，切换电路201的第一输入端用于接收第一电源提供的第一交流电，切换电路201的第二输入端用于接收第二电源提供的第二交流电，切换器用于控制切换电路201的输出端与第一输入端连接，或者控制切换电路201的输出端与第二输入端连接。其中，切换器可以包括功率半导体器件或者机械器件。
下面给出切换器的具体结构。
在一种实现方式中，切换器可以包括第一开关和第二开关。其中，第一开关的第一端与切换电路201的第一输入端连接，第二开关的第一端与切换电路201的第二输入端连接，第一开关的第二端和第二开关的第二端均与切换电路201的输出端连接。
应理解，第一开关和第二开关的闭合或者断开，可以直接控制切换电路201的输出端输出第一交流电或者输出第二交流电，当第一电源和第二电源中的至少一个正常时，切换电路201的输出端输出第一电压或者第二电压，即只需要其中一个电源为转换电路202提供电能。例如，当第一开关闭合、且第一电源无故障时，切换电路201的输出端输出第一电压，若在第一电源发生故障时，可以断开第一开关，闭合第二开关，此时切换电路201的输出端输出第二电压。在通过供电装置200为用电设备供电时，同一时刻只需要一个电源为用电设备供电，因此，可以提高第一电源输出的第一电压和第二电源输出的第二电压的电能利用率。其中，第一开关和第二开关可以为联动开关。
在另一种实现方式中，切换器可以包括双刀双掷开关。其中，当双刀双掷开关处于第一位置时，切换电路201的第一输入端与切换电路201的输出端连接；当双刀双掷开关处于第二位置时，切换电路201的第二输入端与切换电路201的输出端连接。
为了便于理解，下面给出切换电路201的具体示例。
参见图3为本申请实施例提供的一种切换电路201的结构示意图。在图3中，K可以视为双刀双掷开关，K组成切换器。A可以视为切换电路201的第一输入端的第一端点，B可以视为切换电路201的第一输入端的第二端点，A和B分别与第一电源的两个输出端连接。C可以视为切换电路201的第二输入端的第一端点，D可以视为切换电路201的第二输入端的第二端点，C和D分别与第二电源的两个输出端连接。E可以视为切换电路201的输出端的第一端点，F可以视为切换电路201的输出端的第二端点，E和F与转换电路202的输入端的两个端点连接。
通过图3所示的切换电路201为用电设备供电时，A和B作为第一单相输入端用于接收第一电源提供的第一电压，C和D作为第二单相输入端用于接收第二电源提供的第二电压，E和F作为输出端用于输出第三电压，能量从左向右传输，将左侧输入的两路单相交流电或者直流电中的其中一路电压输出。
在通过图3所示的切换电路201为用电设备供电时，当双刀双掷开关K处于第一位置时，E和F分别与A和B连接，此时，第一电源输出的第一电压通过K输出给转换电路 202。当双刀双掷开关K处于第二位置时，E和F分别与C和D连接，此时，第二电源输出的第二电压通过K输出给转换电路202。
当然，以上对切换电路201的结构的介绍仅为示例，实际应用中，切换电路201也可以采用其它结构，例如，可以采用两个接触器的结构，本申请这里不做详细介绍。
二、转换电路202
转换电路202包括输入端和输出端。其中，转换电路202的输入端与切换电路201的输出端连接，转换电路202的输出端用于与用电设备连接。下面给出转换电路202的具体结构。
转换电路202包括转换器。其中，转换器的输入端为转换电路202的输入端，转换器的输出端为转换电路202的输出端。
其中，设置转换器的作用为：当第一电压和第二电压为直流电时，转换器用于在接收的第一电压的电压值大于第一预设电压阈值或者接收的第二电压的电压值大于第一预设电压阈值时，将第一电压或者第二电压转换为第三电压，并将第三电压通过转换器的输出端输出；或者当第一电压和第二电压为交流电时，转换器用于在接收的第一电压的有效值大于第一预设电压阈值或者第二电压的有效值大于第一预设电压阈值时，将第一电压或者第二电压转换为第三电压，将第三电压通过转换器的输出端输出。例如，第一预设电压阈值为5V，当然也可以设置为0V，本申请这里不做详细介绍。
在一种实现方式中，转换电路202还可以包括第一储能装置，第一储能装置与转换器的输出端连接；其中，第一储能装置可以用于在第三电压的电压值大于第二预设电压阈值时，将转换器输出的第三电压的一部分进行存储，以及在第三电压的电压值小于或者等于第二预设电压阈值时，将存储的直流电通过转换器的输出端输出给用电设备。其中，第一储能装置可以包括以下任意一种：铅碳电池、磷酸铁锂电池、三元锂电池、钠硫电池、石墨烯电池、电容器或者液流电池。其中，第二预设电压阈值可以为5V，当然也可以设置为0V，本申请这里不做详细介绍。
在另一种实现方式中，转换电路202的输出端可以与第二储能装置连接，该第二储能装置独立于转换电路202；其中，第二储能装置与转换电路202的输出端连接。其中，第二储能装置可以用于在第三电压的电压值大于第三预设电压阈值时，将转换电路202输出的直流电的一部分进行存储，以及在第三电压的电压值小于或者等于第三预设电压阈值时，将存储的直流电通过转换电路202的输出端输出给用电设备。其中，第三预设电压阈值可以为5V，当然也可以设置为0V，本申请这里不做详细介绍。
应理解，为了保证第一电源和第二电源发生故障时，供电的可靠性，第二储能装置还可以与外部直流电源连接，用于在第一电源和第二电源长时间发生故障时，满足用电设备的对电能的需求。下面给出转换器的具体结构。
转换器可以包括：第一H桥整流电路、隔离变压器和第二H桥整流电路；其中，隔离变压器的原边绕组与第一H桥整流电路耦合，隔离变压器的副边绕组与第二H桥整流电路耦合。
第一H桥整流电路，可以由开关管组成，用于对第一电压和第二电压进行调压；第二H桥整流电路，也可以由开关管组成，用于对调压后的第一电压和第二电压进行整流，输出第三电压。
本申请实施例中，转换器可以采用现有结构，即由两个H桥整流电路和一个隔离变 压器组成。其中，第一H桥整流电路的第一桥臂的中间节点和第二桥臂的中间节点的可以作为转换电路202的输入端的两个端点，与切换电路201的输出端的两个端点连接，第二H桥整流电路的第一桥臂的中间节点和第二桥臂的中间节点可以作为转换电路202的输出端的两个端点，用于与用电设备的正负线连接(此时，转换电路202的输入端两端的电压为第一电压或者第二电压，转换电路202的输出端两端的电压为第三电压)。
采用上述转换器，可以对第一电压和第二电压进行调压和整流处理，还可以实现电源与用电设备的隔离。
应理解，为了提高转换电路202转换直流电的效率，转换电路202还包括电感。该电感与第一H桥整流电路构成功率因数校正(power factor correction，PFC)电路，其中电感跨接在第一H桥整流电路与转换电路202的输入端之间。
为了便于理解，下面给出转换电路202的两种具体示例。
参见图4为本申请实施例提供的一种转换电路202的结构示意图。在图4中，A和B作为输入端，C和D作为输出端，MOS管Q1Q2/Q3/Q4组成第一H桥整流电路，MOS管Q5/Q6/Q7/Q8组成第二H桥整流电路，L、C1和T组成隔离变压器。其中，L和T可以是分立结构，也可以采用磁集成方式。
当通过供电装置200为用电设备供电时，A和B作为输入端，用于接收切换电路201输出的第一电压或者第二电压，C和D作为输出端，用于与用电设备连接，输出第三电压，实现为用电设备供电。
通过图4所示的转换电路202为用电设备供电时，当第一电源和第二电源中的至少一个正常时，A和B作为输入端，C和D作为输出端，能量从左向右传输，将左侧输入的单相交流电或者直流电压转换为用电设备的供电电压后输出给用电设备。当第一电源和第二电源均发生故障时，供电装置200中独立于转换电路202设置的第二储能装置作为输入端，C和D作为输出端，将第二储能装置存储的直流电输出给用电设备。
具体的，通过图4所示的转换电路202为用电设备供电时，转换电路202还可以包括第二控制器，该第二控制器与转换电路202中的开关管连接，可以用于控制转换器将第一电压或者第二电压转换为第三电压，以及在第三电压的电压值小于或者等于第三预设电压阈值时，控制第二储能装置将存储的直流电通过转换器的输出端输出。
具体地，若转换电路202的各电路中的开关管为金属氧化物半导体(metal oxide semiconductor，MOS)管，该第二控制器可以与MOS管的栅极连接，从通过控制MOS管的通断使得供电装置200为用电设备供电；若转换电路202的各电路中的开关管为双极结型晶体管(bipolar junction transistor，BJT)，该第二控制器可以与BJT的基极连接，从通过控制BJT的通断使得供电装置200实现为用电设备供电。
在一种可能的设计中，若第二控制器还可以与切换器连接，通过控制切换电路201中包括的开关管的通断实现控制切换电路201输出第一电压或者第二电压。
具体实现时，第二控制器可以是微控制单元(micro controller unit，MCU)、中央处理器(central processing unit，CPU)、数字信号处理器(digital singnal processor，DSP)中的任一种。当然，第二控制器的具体形态不限于上述举例。
参见图5为本申请实施例提供的另一种转换电路202的结构示意图。在图5中，A和B作为输入端，C和D作为输出端，MOS管Q1/Q2/Q3/Q4组成第一H桥整流电路， MOS管Q5/Q6/Q7/Q8组成第二H桥整流电路，L、C1和T组成隔离变压器，E可以视为第一储能装置。其中，L和T可以是分立结构，也可以采用磁集成方式。
当通过供电装置200为用电设备供电时，A和B作为输入端，用于接收切换电路201输出的第一电压或者第二电压，C和D作为输出端，用于与用电设备连接，输出第三电压，实现为用电设备供电。
通过图5所示的转换电路202为用电设备供电时，当第一电源和第二电源中的至少一个正常时，A和B作为输入端，C和D作为输出端，能量从左向右传输，将左侧输入的单相交流电或者直流电转换为用电设备的供电电压后输出给用电设备。当第一电源和第二电源均发生故障时，E作为输入端，C和D作为输出端，将E存储的直流电输出给用电设备。
此外，转换电路202采用上述结构，除了可以实现将交流电转换为直流电和直流电的电压转换之外，还可以通过控制转换电路202中的开关管的通断获得高功率因数和低电流谐波。
具体的，通过图5所示的转换电路202为用电设备供电时，转换电路202还可以包括第一控制器，该第一控制器与转换电路202中的开关管连接，可以用于控制转换器将第一电压或者第二电压转换为第三电压，以及在第三电压的电压值小于或者等于第三预设电压阈值时，控制第一储能装置将存储的直流电通过转换器的输出端输出。
具体地，若转换电路202的各电路中的开关管为MOS管，该第一控制器可以与MOS管的栅极连接，从通过控制MOS管的通断使得供电装置200为用电设备供电；若转换电路202的各电路中的开关管为BJT，该第一控制器可以与BJT的基极连接，从通过控制BJT的通断使得供电装置200实现为用电设备供电。
本申请中，转换电路202还可以包括第一控制器，该第一控制器用于在第三电压的电压值大于第三预设电压阈值时，将转换器输出的直流电的一部分进行存储，以及在第三电压的电压值小于或者等于第三预设电压阈值时，将存储的直流电通过转换器的输出端输出，此时供电装置200为用电设备供电。
具体地，若供电装置200的各电路中的开关管为MOS管，该第一控制器可以与MOS管的栅极连接，通过控制MOS管的通断使得供电装置200实现为用电设备供电；若供电装置200的各电路中的开关管为BJT，该控制器可以与BJT的基极连接，从通过控制BJT的通断使得供电装置200实现为用电设备供电。
在一种可能的设计中，若第一控制器还可以与切换器连接，通过控制切换电路201中包括的开关管的通断实现控制切换电路201输出第一电压或者第二电压。
具体实现时，第一控制器可以是微控制单元MCU、中央处理器CPU、数字信号处理器DSP中的任一种。当然，第一控制器的具体形态不限于上述举例。
结合以上描述，示例地，本申请实施例提供的一种供电装置，可以如图6所示，该供电装置600包括切换电路601、转换电路602、第二储能装置603。
在切换电路601中，包括双刀双掷开关K。其中，当双刀双掷开关K处于第一位置时，K的第一端与A连接，K的第二端与B连接，当K处于第二位置时，K的第一端与C连接，K的第二端与D连接。其中，A为第一电源的输出端的第一端点，B为第一电源的输出端的第二端点，C为第二电源的输出端的第一端点，D为第二电源的输出端的第二端点。
在转换电路602中，包括电感L和开关管Q1/Q2/Q3/Q4/Q5/Q6/Q7/Q8。其中，Q1的漏极与K的第一端连接，Q2的源极与K的第二端连接，Q7的漏极可以与用电设备的正 接线端连接，Q8的源极可以与用电设备的负接线端连接。
在第二储能装置603中，第二储能装置603包括直流蓄电池V1，该直流蓄电池的正接线端可以与Q7的漏极连接，该直流蓄电池的负接线端可以与Q8的源极连接。
以上开关管的栅极均与外部控制电路(或者第二控制器)连接，控制电路通过控制开关管的通断实现将转换电路602接收的第一电压或者第二电压转换为第三电压(用电设备的供电电压)的功能。其中，第二控制器可以设置在转换电路602内部，也可以独立与转换电路602，本申请这里不做具体限定。
具体地，第一电源和第二电源后连接切换电路601，切换电路601后连接转换电路602，K作为供电装置600的第一输入端，用于接收第一电源输出的第一电压或者第二电源输出的第二电压，切换电路601选择两路电源(第一电源或者第二电源)中的其中一路电源输出的电压输出给转换电路602，转换电路602用于将切换电路601输出的电压(第一电压或者第二电压)转换为第三电压。转换电路602的输出端E和F作为供电装置600的输出端，用于与用电设备连接，用于输出第三电压为用电设备供电。
在上述提供的供电装置600中，由于在为用电设备供电过程中，只有两路电源中的其中一路电源为用电设备供电，且通过一个供电装置600便可实现将两路电源输出的第一电压和第二电压转换为用电设备的供电电压。因此，在通过两路电源为用电设备供电时，只需要一个供电装置600即可实现将两路电源输出的电压转换为用电设备的供电电压，并为用电设备供电，可以有效减小供电装置600的成本和体积。
具体的，采用上述提供的供电装置600为用电设备供电过程中，当第一电源和第二电源正常时，可以采用第一电源和第二电源中的任意一个为作为供电电源，当第一电源或者第二电源发生故障时，可以转换另一个电源为供电电源。当第一电源和第二电源均发生故障时，此时可以将第二储能装置603存储的直流电提供给用电设备，以提高供电装置600的供电可靠性。其中，第二储能装置603可以与直流电源连接，用于当第一电源和第二电源长时间处于故障状态时，保证用电设备可以正常工作，以提高供电可靠性。
结合以上描述，示例地，本申请实施例提供的另一种供电装置，可以如图7所示，该供电装置700包括切换电路701和转换电路702。
在切换电路701中，包括双刀双掷开关K。其中，当双刀双掷开关K处于第一位置时，K的第一端与A连接，K的第二端与B连接，当K处于第二位置时，K的第一端与C连接，K的第二端与D连接。其中，A为第一电源的输出端的第一端点，B为第一电源的输出端的第二端点，C为第二电源的输出端的第一端点，D为第二电源的输出端的第二端点。
在转换电路702中，包括电感L、开关管S1/S2/S3/S4和第一储能装置V2。其中，Q1的漏极与K的第一端连接，Q2的源极与K的第二端连接，Q7的漏极的用电设备的正接线端连接，Q8的源极与用电设备的负接线端连接，V2的正接线端与Q7的漏极连接，V2的负接线端与Q8的源极连接。
以上开关管的栅极均与外部控制电路(或第一控制器)连接，控制电路通过控制开关管的通断实现将交流转直流转换电路702接收的交流电转换为直流电的功能。其中，第一控制器可以设置在转换电路702内部，也可以独立与转换电路702，本申请对此这里不做具体限定。
具体地，第一电源和第二电源后连接切换电路701，切换电路701后连接转换电路702，K作为供电装置700的第一输入端，用于接收第一电源输出的第一电压或者第二电源输出 的第二电压，切换电路701选择两路电源(第一电源和第二电源)中的其中一路电源输出给转换电路702，转换电路702用于将接收的切换电路701输出的电压(第一电压或者第二电压)转换为第三电压。转换电路702的输出端E和F作为供电装置700的输出端，用于与用电设备连接，用于输出第三电压为用电设备供电。
在上述提供的供电装置700中，由于在为用电设备供电过程中，只有两路电源中的其中一路电源为用电设备供电，且通过一个供电装置700便可实现将两路电源输出的第一电压和第二电压转换为用电设备的供电电压。因此，在通过两路电源为用电设备供电时，只需要一个供电装置700即可实现将两路电源输出的电压转换为用电设备的供电电压，并为用电设备供电，可以有效减小供电装置700的成本和体积。
具体的，采用上述提供的供电装置700为用电设备供电过程中，当第一电源和第二电源正常时，可以采用第一电源和第二电源中的任意一个为作为供电电源，当第一电源或者第二电源发生故障时，可以转换另一个电源为供电电源。当第一电源和第二电源均发生故障时，此时可以将第一储能装置V2存储的直流电提供给用电设备，以提高供电装置700的供电可靠性。
综上，采用本申请实施例提供的供电装置，在为用电设备供电时，既可以实现减小供电装置的体积，也可以降低供电装置的成本。
本申请实施例还提供一种供电系统。参见图8，该供电系统800可以包括第一电源801、第二电源802以及多个前述供电装置200。
可选地，第一电源801与多个供电装置200中每一个供电装置200的第一输入端连接，第一电源801用于为多个供电装置200供电。
可选地，第二电源802与多个供电装置200中每一个供电装置200的第二输入端连接，第二电源802用于为多个供电装置200供电。
可选地，多个供电装置200与多个用电设备一一对应连接，多个供电装置200用于为多个用电设备供电。
在一种可能的设计中，该供电系统800连接在分布式数据中心系统中的两路供电电源与用电设备之间，该供电系统800用于通过供电电源输出的电压为用电设备供电。
可选地，供电电源可以包括以下任意一种：市电、发电机或者UPS。
在一种可能的设计中，该供电系统800连接在两路供电电源与服务器之间，该供电系统800用于通过供电电源输出的电压为服务器供电。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的权利要求范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (10)

  1. 一种供电装置，其特征在于，包括：
    切换电路，所述切换电路包括切换器、第一输入端、第二输入端以及输出端，所述切换电路的第一输入端用于接收第一电源提供的第一电压，所述切换电路的第二输入端用于接收第二电源提供的第二电压，所述切换器用于控制所述切换电路的输出端与所述第一输入端连接，或者控制所述切换电路的输出端与所述第二输入端连接；
    转换电路，所述转换电路包括输入端和输出端，所述转换电路的输入端与所述切换电路的输出端连接，且所述转换电路的输出端与用电设备连接，所述转换电路用于接收所述第一电压或者所述第二电压，将接收的所述第一电压或者所述第二电压转换为第三电压，并将所述第三电压通过所述转换电路的输出端输出。
  2. 根据权利要求1所述的供电装置，其特征在于，所述转换电路包括转换器；
    所述转换器的输入端为所述转换电路的输入端，所述转换器的输出端为所述转换电路的输出端；
    当所述第一电压和所述第二电压为直流电时，所述转换器用于在接收的所述第一电压的电压值大于第一预设电压阈值或者接收的所述第二电压的电压值大于所述第一预设电压阈值时，将所述第一电压或者所述第二电压转换为所述第三电压，并将所述第三电压通过所述转换器的输出端输出；或者
    当所述第一电压和所述第二电压为交流电时，所述转换器用于在接收的所述第一电压的有效值大于所述第一预设电压阈值或者所述第二电压的有效值大于所述第一预设电压阈值时，将所述第一电压或者所述第二电压转换为所述第三电压，将所述第三电压通过所述转换器的输出端输出。
  3. 根据权利要求2所述的供电装置，其特征在于，所述转换电路还包括第一储能装置；
    所述第一储能装置与所述转换器的输出端连接；
    所述第一储能装置，用于在所述第三电压的电压值大于第二预设电压阈值时，将所述转换器输出的所述第三电压的一部分进行存储，以及在所述第三电压的电压值小于或等于所述第二预设电压阈值时，将存储的电压通过所述转换器的输出端输出。
  4. 根据权利要求2所述的供电装置，其特征在于，所述供电装置还包括：独立于所述转换电路的第二储能装置；
    所述第二储能装置与所述转换电路的输出端连接；
    所述第二储能装置，用于在所述第三电压的电压值大于第三预设电压阈值时，将所述转换器输出的所述第三电压的电压值的一部分进行存储，以及在所述第三电压的电压值小于或者等于所述第二预设电压阈值时，将存储的电压通过所述转换器的输出端输出。
  5. 根据权利要求3所述的供电装置，其特征在于，所述转换电路还包括第一控制器，用于控制所述转换器将所述第一电压或者所述第二电压转换为所述第三电压，以及在所述第三电压的电压值小于或者等于所述第二预设电压阈值时，控制所述第一储能装置将存储的电压通过所述转换器的输出端输出。
  6. 根据权利要求4所述的供电装置，其特征在于，所述供电装置还包括第二控制器，用于控制所述转换器将所述第一电压或者所述第二电压转换为所述第三电压，以及在所述 第三电压的电压值小于或者等于所述第三预设电压阈值时，控制所述第二储能装置将存储的电压通过所述转换器的输出端输出。
  7. 根据权利要求3所述的供电装置，其特征在于，所述第一储能装置包括以下的任意一种：铅碳电池、磷酸铁锂电池、三元锂电池、钠硫电池、石墨烯电池、电容器或者液流电池。
  8. 根据权利要求4所述的供电装置，其特征在于，所述第二储能装置包括以下的任意一种：铅碳电池、磷酸铁锂电池、三元锂电池、钠硫电池、石墨烯电池、电容器或者液流电池。
  9. 根据权利要求1-8中任一项所述的供电装置，其特征在于，所述切换器包括：功率半导体器件或者机械切换器件。
  10. 一种供电系统，其特征在于，包括第一电源、第二电源以及多个如权利要求1-9中任一项所述供电装置，
    所述第一电源与所述多个供电装置中每一个供电装置的第一输入端连接，所述第一电源用于为所述多个供电装置供电；
    所述第二电源与所述多个供电装置中每一个供电装置的第二输入端连接，所述第二电源用于为所述多个供电装置供电；
    所述多个供电装置与多个用电设备一一对应连接，所述多个供电装置用于为所述多个用电设备供电。
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