CN114825318A - AC-DC hybrid uninterrupted power supply system - Google Patents
AC-DC hybrid uninterrupted power supply system Download PDFInfo
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- CN114825318A CN114825318A CN202110086957.2A CN202110086957A CN114825318A CN 114825318 A CN114825318 A CN 114825318A CN 202110086957 A CN202110086957 A CN 202110086957A CN 114825318 A CN114825318 A CN 114825318A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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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
- H02J9/061—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
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides an AC/DC hybrid uninterrupted power supply system, which comprises a mains supply device, a DC power supply device, an AC power supply device and a DC/AC conversion device, wherein the mains supply device is connected with the AC power supply device; the commercial power supply device outputs a first commercial power and a second commercial power; the direct current power supply device is connected with the commercial power supply device and used for converting a first path of commercial power output by the commercial power supply device into direct current and transmitting the direct current to the dual-power load to supply power to the dual-power load while storing the direct current; the alternating current power supply device is connected with the commercial power supply device and used for stabilizing the voltage of a second path of commercial power output by the commercial power supply device and then transmitting the second path of commercial power to the dual-power load so as to supply power to the dual-power load; the direct current/alternating current conversion device is connected with the direct current supply device and used for converting direct current converted by the direct current supply device into alternating current and transmitting the alternating current obtained by conversion to the alternating current supply device. The invention can realize that the alternating current and the direct current of the dual-power load support uninterrupted power supply.
Description
Technical Field
The invention relates to the technical field of power supply systems, in particular to an alternating current and direct current hybrid uninterruptible power supply system.
Background
The data center is an infrastructure supporting critical digital services, and therefore, for a power supply system of the data center, high reliability and low cost of the power supply system are ensured at the same time. At present, the IT equipment generally adopts double power supply input. In order to ensure high reliability of operation of a data center power supply system, one method is to realize uninterrupted power supply of a dual-power load by configuring two Uninterrupted Power Supplies (UPS), but the operation cost of the system is very high; the other method is to adopt a power supply system with a first path of commercial power direct supply and a path of high-voltage direct-current power supply to supply power to a dual-power load, which can improve the energy efficiency of the system and save the operation cost, but can not ensure uninterrupted power supply and can not meet the requirement of high reliability.
Chinese patent CN210183090U published in 7, 17.2019 provides an uninterruptible power supply circuit and an uninterruptible power supply apparatus, where the uninterruptible power supply circuit for continuously and uninterruptedly supplying power to a load includes: a main power supply circuit outputting a power supply voltage; the output circuit is used for receiving the power supply voltage output by the main power supply circuit to supply power to a load; a power supply module; a switch control circuit; the power supply module is connected with the output circuit through the switch, and the controlled end of the switch is connected with the control end of the switch control circuit; the switch control circuit is further used for controlling the power supply module to supply power to the output circuit when the output voltage of the power supply module is greater than the output voltage of the output circuit; and when the output voltage of the power supply module is less than the output voltage of the output circuit, controlling the power supply module to stop supplying power. The patent can realize uninterrupted power supply to the single type current of the load, but can not realize uninterrupted power supply to the alternating current and the direct current of the dual-power load.
Disclosure of Invention
The invention provides an AC/DC hybrid uninterrupted power supply system for overcoming the defect that the prior art can not ensure uninterrupted power supply for AC and DC of a dual-power load.
The technical scheme of the invention is as follows:
the invention provides an AC/DC hybrid uninterrupted power supply system, which comprises a mains supply device, a DC power supply device, an AC power supply device and a DC/AC conversion device, wherein the mains supply device is connected with the AC power supply device;
the commercial power supply device outputs a first path of commercial power and a second path of commercial power, and the first path of commercial power and the second path of commercial power are mutually standby;
the direct current power supply device is connected with the commercial power supply device and used for converting a first path of commercial power output by the commercial power supply device into direct current and storing the direct current and simultaneously transmitting the direct current to a dual-power load so as to supply power to the dual-power load;
the alternating current power supply device is connected with the commercial power supply device and is used for stabilizing the voltage of a second path of commercial power output by the commercial power supply device and then transmitting the second path of commercial power to the dual-power load so as to supply power to the dual-power load;
the direct current/alternating current conversion device is connected with the direct current power supply device and is used for converting direct current converted by the direct current power supply device into alternating current and transmitting the alternating current obtained by conversion to the alternating current power supply device;
if the commercial power supply device outputs the first commercial power and the second commercial power which are both normal, the direct current power supply device converts the first commercial power into direct current and transmits the direct current to a dual-power load; meanwhile, the alternating current power supply device transmits a second path of commercial power to a dual-power load;
if any first path of commercial power output by the commercial power supply device fails, the other first path of commercial power which does not fail is simultaneously transmitted to the direct current power supply device and the alternating current power supply device and transmitted to a dual-power load through the direct current power supply device and the alternating current power supply device;
if the first commercial power and the second commercial power output by the commercial power supply device both have faults, the direct current supply device simultaneously transmits the stored direct current to a dual-power load and a direct/alternating current conversion device, and the direct/alternating current conversion device converts the received direct current into alternating current and transmits the alternating current to the alternating current supply device, and the alternating current is transmitted to the dual-power load through the alternating current supply device.
Preferably, the commercial power supply device comprises a first transformer, a first power distribution unit, a bus tie switch, a second transformer and a second power distribution unit;
the output end of the first transformer is connected with the direct current power supply device through a first power distribution unit;
the output end of the second transformer is connected with the alternating current power supply device through a second power distribution unit;
the bus bar interconnection switch is connected with the output end of the first transformer and the output end of the second transformer and is used for enabling the first path of commercial power and the second path of commercial power to be mutually standby.
Preferably, the dc power supply device includes an ac/dc conversion unit, a battery pack, and a dc power distribution unit;
the input end of the AC/DC conversion unit is connected with the first power distribution unit, the output end of the AC/DC conversion unit is connected with the input end of the DC power distribution unit, and the output end of the DC power distribution unit is connected with the DC input side of a dual-power load;
the output end of the AC/DC conversion unit is also connected with the DC/AC conversion device;
the battery pack is arranged between the AC/DC conversion unit and the DC distribution unit.
Preferably, the ac power supply device includes a static switch, an inductor, and an ac power distribution unit; the static switch is used for isolating the input electrical fault, and the inductor is used for stabilizing the voltage of the second commercial power;
one end of the static switch is connected with the second power distribution unit, the other end of the static switch is connected with one end of the inductor, the other end of the inductor is connected with the input end of the alternating current power distribution unit, and the output end of the alternating current power distribution unit is connected with the alternating current input side of the dual-power-supply load;
the other end of the static switch is also connected with a direct/alternating current conversion device.
Preferably, the dc/ac conversion device includes a maintenance switch and a dc/ac conversion unit; the maintenance switch is a normally closed switch and is disconnected when the direct current/alternating current conversion unit needs maintenance;
one end of the maintenance switch is connected with the output end of the AC/DC conversion unit, the other end of the maintenance switch is connected with the input end of the DC/AC conversion unit, and the output end of the DC/AC conversion unit is connected with the other end of the static switch.
Preferably, the ac/dc conversion unit is a rectifier; the direct/alternating current conversion unit is an inverter.
Preferably, the bus tie switch is in an off state when the first transformer and the second transformer both normally output; the bus tie switch is closed when the first transformer or the second transformer has no output.
Preferably, the static switch is in a closed state when the output of the second power distribution unit is normal; the static switch is open when the second power distribution unit has no output.
Preferably, the inverter is in an open state when the static switch is closed; the inverter is started when the static switch is turned off.
Preferably, the battery pack is in a charged state when the rectifier output is normal; and the battery pack is converted into a discharge state when the rectifier does not output, and outputs direct current to the input end of the direct current power distribution unit and one end of the maintenance switch.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides an alternating current and direct current mixed uninterrupted power supply system which comprises a commercial power supply device, a direct current power supply device, an alternating current power supply device and a direct current/alternating current conversion device. When the commercial power supply device outputs the first commercial power and the second commercial power which are both normal, the direct current power supply device converts the first commercial power into direct current to be transmitted to the dual-power load, and the alternating current power supply device transmits the second commercial power to the dual-power load; when any one path of commercial power output by the commercial power supply device fails, the other path of commercial power which does not fail is simultaneously transmitted to the direct current power supply device and the alternating current power supply device and transmitted to the dual-power load through the direct current power supply device and the alternating current power supply device; when the first commercial power and the second commercial power output by the commercial power supply device both have faults, the direct current supply device simultaneously transmits the stored direct current to the dual-power load and the direct/alternating current conversion device, and the direct/alternating current conversion device converts the received direct current into alternating current and transmits the alternating current to the alternating current power supply device, and the alternating current power supply device transmits the alternating current to the dual-power load. The invention can realize uninterrupted power supply to alternating current and direct current of the dual-power load.
Drawings
Fig. 1 is a schematic structural diagram of an ac/dc hybrid uninterruptible power supply system according to embodiment 1;
fig. 2 is a schematic structural diagram of an ac/dc hybrid uninterruptible power supply system according to embodiment 2;
in the figure: 1-mains supply device, 2-direct current supply device, 3-alternating current supply device, 4-direct current/alternating current conversion device, 10-first transformer, 11-first distribution unit, 12-bus interconnection switch, 13-second transformer, 14-second distribution unit, 20-alternating current/direct current conversion unit, 21-battery pack, 22-direct current distribution unit, 30-static switch, 31-inductor, 32-alternating current distribution unit, 40-maintenance switch and 41-direct current/alternating current conversion unit.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
The present embodiment provides an ac/dc hybrid uninterruptible power supply system, as shown in fig. 1, the system includes a utility power supply device 1, a dc power supply device 2, an ac power supply device 3, and a dc/ac conversion device 4;
the commercial power supply device 1 outputs a first commercial power and a second commercial power, and the first commercial power and the second commercial power are mutually standby;
the direct current power supply device 2 is connected with the commercial power supply device 1 and is used for converting a first path of commercial power output by the commercial power supply device 1 into direct current and transmitting the converted direct current to a dual-power load so as to supply power to the dual-power load;
the alternating current power supply device 3 is connected with the commercial power supply device 1 and is used for transmitting a second path of commercial power output by the commercial power supply device 1 to a dual-power load so as to supply power to the dual-power load;
the dc/ac conversion device 4 is connected to the dc power supply device 2, and is configured to convert the dc power converted by the dc power supply device 2 into ac power, and transmit the ac power obtained by conversion to the ac power supply device 3;
if the commercial power supply device 1 outputs the first commercial power and the second commercial power which are both normal, the direct current power supply device 2 converts the first commercial power into direct current and transmits the direct current to a dual-power load; meanwhile, the alternating current power supply device 3 transmits a second path of commercial power to a dual-power load;
if any one of the commercial power output by the commercial power supply device 1 fails, the other commercial power which does not fail is simultaneously transmitted to the direct current power supply device 2 and the alternating current power supply device 3 and transmitted to the dual-power load through the direct current power supply device 2 and the alternating current power supply device 3;
if the first commercial power and the second commercial power output by the commercial power supply device 1 both have faults, the direct current supply device 2 simultaneously transmits the stored direct current to a dual-power load and the direct/alternating current conversion device 4, and the direct/alternating current conversion device 4 converts the received direct current into alternating current and transmits the alternating current to the alternating current supply device 3, and the alternating current is transmitted to the dual-power load through the alternating current supply device 3.
The embodiment can realize that the alternating current and the direct current of the dual-power load support uninterrupted power supply.
Example 2
The present embodiment provides an ac/dc hybrid uninterruptible power supply system, as shown in fig. 2, the system includes a utility power supply device 1, a dc power supply device 2, an ac power supply device 3, and a dc/ac conversion device 4;
the commercial power supply device 1 outputs a first commercial power and a second commercial power, and the first commercial power and the second commercial power are mutually standby;
the direct current power supply device 2 is connected with the commercial power supply device 1 and is used for converting a first path of commercial power output by the commercial power supply device 1 into direct current and transmitting the converted direct current to a dual-power load so as to supply power to the dual-power load;
the alternating current power supply device 3 is connected with the commercial power supply device 1 and is used for transmitting a second path of commercial power output by the commercial power supply device 1 to a dual-power load so as to supply power to the dual-power load;
the dc/ac conversion device 4 is connected to the dc power supply device 2, and is configured to convert the dc power converted by the dc power supply device 2 into ac power, and transmit the ac power obtained by the conversion to the ac power supply device 3.
The commercial power supply device 1 comprises a first transformer 10, a first power distribution unit 11, a bus tie switch 12, a second transformer 13 and a second power distribution unit 14;
the output end of the first transformer 10 is connected with the dc power supply device 2 through a first power distribution unit 11;
the output end of the second transformer 13 is connected with the alternating current power supply device 3 through a second power distribution unit 14;
the bus bar interconnection switch 12 is connected with the output end of the first transformer 10 and the output end of the second transformer 12, and is used for enabling the first path of commercial power and the second path of commercial power to be mutually standby.
The direct current power supply device 2 comprises an alternating current/direct current conversion unit 20, a battery pack 21 and a direct current distribution unit 22;
the input end of the ac/dc conversion unit 20 is connected to the first power distribution unit 11, the output end of the ac/dc conversion unit 20 is connected to the input end of the dc power distribution unit 22, and the output end of the dc power distribution unit 22 is connected to the dc input side of the dual power supply load;
the output end of the ac/dc conversion unit 20 is further connected to the dc/ac conversion device 4;
the battery pack 21 is disposed between the ac/dc conversion unit 20 and the dc distribution unit 22.
The ac power supply device 3 includes a static switch 30, an inductor 31, and an ac power distribution unit 32;
one end of the static switch 30 is connected with the second power distribution unit 14, the other end of the static switch 30 is connected with one end of the inductor 31, the other end of the inductor 31 is connected with the input end of the alternating current power distribution unit 32, and the output end of the alternating current power distribution unit 32 is connected with the alternating current input side of the dual-power load;
the other end of the static switch 30 is also connected to the dc/ac conversion device 4.
The dc/ac conversion device 4 includes a maintenance switch 40 and a dc/ac conversion unit 41; the maintenance switch 40 is a normally closed switch, and is turned off when the dc/ac conversion unit 41 needs maintenance;
one end of the maintenance switch 40 is connected to the output end of the ac/dc conversion unit 20, the other end of the maintenance switch 40 is connected to the input end of the dc/ac conversion unit 41, and the output end of the dc/ac conversion unit 41 is connected to the other end of the static switch 30.
The ac/dc conversion unit 20 is a rectifier; the dc/ac conversion unit 41 is an inverter.
The bus tie switch 12 is in a disconnected state when the first transformer 10 and the second transformer 13 both normally output; the bustie switch 12 is closed when there is no output from the first transformer 10 or the second transformer 13.
The static switch 30 is in a closed state when the output of the second power distribution unit 14 is normal; the static switch 30 is open when there is no output from the second power distribution unit 14.
The inverter is in an open state when the static switch 30 is closed; the inverter is started when the static switch 30 is turned off.
The battery pack 21 is in a charged state when the rectifier output is normal; the battery pack 21 is switched to a discharge state when the rectifier has no output, and outputs a direct current to an input terminal of the direct current distribution unit 22 and one terminal of the maintenance switch 40.
In actual operation:
in the normal mode, the bus bar connecting switch 12 is in an open state, the static switch 30 is in a closed state, the maintenance switch 40 is in a closed state, the battery pack 21 is in a charging state, and the inverter is in an open state; a first path of commercial power passes through a first transformer 10, a first power distribution unit 11, a rectifier and a direct current power distribution unit 22 to a direct current input side of a dual-power load; the second path of commercial power passes through the second transformer 13, the second distribution unit 14, the static switch 30, the inductor 31 and the alternating current distribution unit 32 to the alternating current input side of the dual-power load.
Failure modes include the following: (1) any one-path mains supply output fault; (2) the second power distribution unit 14 has no output and the rectifier has an output; (3) the rectifier has no output, the second power distribution unit 14 has an output; (4) neither the rectifier nor the second power distribution unit 14 has an output.
In case (1), the bus bar relay switch 12 is closed, the static switch 30 is closed, the maintenance switch 40 is closed, the battery pack 21 is charged, and the inverter is opened. Taking the failure of the first commercial power as an example, the second commercial power passes through the second transformer 13, the bus bar interconnection switch 12, the first power distribution unit 11, the rectifier and the direct current power distribution unit 22 to the direct current input side of the dual-power load; meanwhile, the second path of commercial power passes through the second transformer 13, the second power distribution unit 14, the static switch 30, the inductor 31 and the alternating current power distribution unit 32 to the alternating current input side of the dual-power load.
In case (2), the static switch 30 is opened, the maintenance switch 40 is closed, the battery pack 21 is charged, and the inverter is started. A first path of commercial power passes through a first transformer 10 or a second path of commercial power passes through a second transformer 13, a first power distribution unit 11, a rectifier and a direct current power distribution unit 22 to reach a direct current input side of a dual-power load; meanwhile, the first path of commercial power passes through the first transformer 10 or the second path of commercial power passes through the second transformer 13, the first distribution unit 11, the rectifier, the maintenance switch 40, the inverter, the inductor 31 and the alternating current distribution unit 32 to reach the alternating current input side of the dual-power load.
In case (3), the static switch 30 is in the closed state, the maintenance switch 40 is in the closed state, the battery pack 21 is in the discharge state, and the inverter is in the open state. The direct current discharged by the battery pack 21 is transmitted to the direct current input side of the dual-power load through the direct current distribution unit 22; meanwhile, the second path of commercial power passes through the second transformer 13, the second power distribution unit 14, the static switch 30, the inductor 31 and the alternating current power distribution unit 32 to the alternating current input side of the dual-power load.
In case (4), the static switch 30 is opened, the maintenance switch 40 is closed, the battery pack 21 is discharged, and the inverter is started. The direct current discharged by the battery pack 21 is transmitted to the direct current input side of the dual-power load through the direct current distribution unit 22; meanwhile, the direct current discharged from the battery pack 21 passes through the maintenance switch 40, the inverter, the inductor 31, and the alternating current distribution unit 32 to the alternating current input side of the dual power load.
The alternating current and direct current hybrid uninterrupted power supply system provided by the embodiment can realize that the alternating current and the direct current of the dual-power load can support uninterrupted power supply under various fault conditions.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An AC/DC hybrid uninterrupted power supply system is characterized by comprising a commercial power supply device (1), a DC power supply device (2), an AC power supply device (3) and a DC/AC conversion device (4);
the mains supply device (1) outputs a first path of mains supply and a second path of mains supply, and the first path of mains supply and the second path of mains supply are mutually standby;
the direct current power supply device (2) is connected with the commercial power supply device (1), converts a first path of commercial power output by the commercial power supply device (1) into direct current, stores the direct current and simultaneously transmits the direct current to a dual-power load so as to supply power to the dual-power load;
the alternating current power supply device (3) is connected with the commercial power supply device (1), and a second path of commercial power output by the commercial power supply device (1) is transmitted to a dual-power load to supply power to the dual-power load;
the direct current/alternating current conversion device (4) is connected with the direct current power supply device (2), converts direct current converted by the direct current power supply device (2) into alternating current, and transmits the alternating current obtained by conversion to the alternating current power supply device (3).
2. AC/DC hybrid uninterruptible power supply system according to claim 1, characterized in that the mains supply device (1) comprises a first transformer (10), a first distribution unit (11), a bussing switch (12), a second transformer (13) and a second distribution unit (14);
the output end of the first transformer (10) is connected with the direct current power supply device (2) through a first power distribution unit (11);
the output end of the second transformer (13) is connected with the alternating current power supply device (3) through a second power distribution unit (14);
the bus bar interconnection switch (12) is connected with the output end of the first transformer (10) and the output end of the second transformer (12) and is used for enabling the first path of commercial power and the second path of commercial power to be mutually standby.
3. The ac-dc hybrid uninterruptible power supply system according to claim 2, wherein the dc power supply device (2) includes an ac/dc conversion unit (20), a battery pack (21), and a dc power distribution unit (22);
the input end of the AC/DC conversion unit (20) is connected with the first power distribution unit (11), the output end of the AC/DC conversion unit (20) is connected with the input end of the DC power distribution unit (22), and the output end of the DC power distribution unit (22) is connected with the DC input side of a dual-power load;
the output end of the AC/DC conversion unit (20) is also connected with the DC/AC conversion device (4);
the battery pack (21) is disposed between the AC/DC conversion unit (20) and the DC distribution unit (22).
4. AC/DC hybrid uninterruptible power supply system according to claim 3, characterized in that the AC power supply unit (3) comprises a static switch (30), an inductor (31) and an AC distribution unit (32);
one end of the static switch (30) is connected with the second power distribution unit (14), the other end of the static switch (30) is connected with one end of the inductor (31), the other end of the inductor (31) is connected with the input end of the alternating current power distribution unit (32), and the output end of the alternating current power distribution unit (32) is connected with the alternating current input side of the dual-power-supply load;
the other end of the static switch (30) is also connected with a direct/alternating current conversion device (4).
5. AC/DC hybrid uninterruptible power supply system according to claim 4, characterized in that the DC/AC conversion device (4) comprises a maintenance switch (40) and a DC/AC conversion unit (41);
one end of the maintenance switch (40) is connected with the output end of the AC/DC conversion unit (20), the other end of the maintenance switch (40) is connected with the input end of the DC/AC conversion unit (41), and the output end of the DC/AC conversion unit (41) is connected with the other end of the static switch (30).
6. AC/DC hybrid uninterruptible power supply system according to claim 5, characterized in that the AC/DC conversion unit (20) is a rectifier; the direct/alternating current conversion unit (41) is an inverter.
7. The AC/DC hybrid uninterruptible power supply system according to claim 6, wherein the bustie switch (12) is in an off state when the outputs of the first transformer (10) and the second transformer (13) are normal; the bus tie switch (12) is closed when the first transformer (10) or the second transformer (13) has no output.
8. The hybrid AC/DC uninterruptible power supply system according to claim 7, wherein the static switch (30) is in a closed state when the output of the second power distribution unit (14) is normal; the static switch (30) opens when the second power distribution unit (14) has no output.
9. The hybrid AC/DC uninterruptible power supply system according to claim 8, wherein the inverter is in an open state when the static switch (30) is closed; the inverter is started when the static switch (30) is turned off.
10. A hybrid ac/dc uninterruptible power supply system according to claim 9, wherein the battery pack (21) is in a charged state when the rectifier output is normal; and the battery pack (21) is converted into a discharge state when the rectifier has no output, and outputs direct current to the input end of the direct current distribution unit (22) and one end of the maintenance switch (40).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024065075A1 (en) * | 2022-09-26 | 2024-04-04 | 航霈科技(深圳)有限公司 | Power supply apparatus, method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024065075A1 (en) * | 2022-09-26 | 2024-04-04 | 航霈科技(深圳)有限公司 | Power supply apparatus, method and system |
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