CN217335082U - Power supply system - Google Patents
Power supply system Download PDFInfo
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- CN217335082U CN217335082U CN202123106971.9U CN202123106971U CN217335082U CN 217335082 U CN217335082 U CN 217335082U CN 202123106971 U CN202123106971 U CN 202123106971U CN 217335082 U CN217335082 U CN 217335082U
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- power supply
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- load power
- load
- transformer substation
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Abstract
The utility model provides a power supply system, which comprises a commercial power network, a transformer substation and at least one load power supply device; wherein the utility power network is connected with a substation; the transformer substation is respectively connected with at least one load power supply device; load power supply unit includes the power supply conversion module, the power supply conversion module includes the AC-DC unit, the first end of AC-DC unit with the transformer substation is connected, and the second end is used for connecting at least one user equipment respectively, the utility model discloses an insert the transformer substation in commercial power and load power supply unit, can step down the commercial power network to reduce the mains voltage that each load power supply unit inserted, thereby can reduce the voltage stress of AD-DC unit among each load power supply unit, and then make each load power supply unit realize the miniaturization more easily.
Description
Technical Field
The utility model relates to a power supply technical field especially relates to a power supply system.
Background
Referring to fig. 1, a power supply system in the prior art is usually directly connected to each load power supply device by the commercial power at the power supply end, the AC-DC unit of each load power supply device supplies power to the DC bus, and each user equipment at the power receiving end is supplied power from the DC bus through a respective converter.
However, the AC-DC units of the conventional load power supply devices are directly connected to the commercial power, and the AC-DC units are required to have high withstand voltage, and thus it is difficult to achieve miniaturization.
SUMMERY OF THE UTILITY MODEL
The utility model provides a power supply system to the withstand voltage requirement of each load power supply unit who solves among the current power supply system is high, leads to being difficult to realize miniaturized technical problem.
The utility model provides a power supply system, include:
the utility power network is connected with a transformer substation;
the transformer substation is respectively connected with at least one load power supply device;
the load power supply device comprises a power supply conversion module, the power supply conversion module comprises an AC-DC unit, a first end of the AC-DC unit is connected with the transformer substation, and a second end of the AC-DC unit is respectively connected with at least one user device.
As an improvement of the above solution, the power supply system further includes an ac supply network, a first end of the ac supply network is connected to the substation, and a second end of the ac supply network is connected to at least one of the load power supply devices, respectively.
As an improvement of the above scheme, the load power supply device further includes an energy storage module, and the energy storage module is connected with a third end of the power supply conversion module.
As an improvement of the above scheme, the power supply conversion module further includes a first DC-DC unit;
the first end of the first DC-DC unit is connected with the energy storage module, and the second end of the first DC-DC unit is respectively connected with at least one user device.
As an improvement of the above solution, the load power supply apparatus further includes at least one second DC-DC unit, the second DC-DC units correspond to the user devices one to one, the AC-DC unit and the first DC-DC unit are connected to an input terminal of the second DC-DC unit through a common DC bus, and an output terminal of the second DC-DC unit is connected to the user devices.
As an improvement of the above scheme, the load power supply device further includes a control module, a first end of the control module is connected to the AC-DC unit, a second end of the control module is connected to the first DC-DC unit, and a third end of the control module is connected to at least one user device.
As an improvement of the above scheme, the energy storage module is any one of a storage battery or a super capacitor.
Compared with the prior art, the utility model provides a power supply system has following beneficial effect:
the utility model discloses a power supply system comprises a commercial power network, a transformer substation and at least one load power supply device; wherein the utility power network is connected with a substation; the transformer substation is respectively connected with at least one load power supply device; load power supply unit includes the power supply conversion module, the power supply conversion module includes the AC-DC unit, the first end of AC-DC unit with the transformer substation is connected, and the second end is used for connecting at least one user equipment respectively, the utility model discloses an insert the transformer substation in commercial power and load power supply unit, can step down the commercial power network to reduce the mains voltage that each load power supply unit inserted, thereby can reduce the voltage stress of AD-DC unit among each load power supply unit, and then make each load power supply unit realize the miniaturization more easily. In addition, because each load power supply device shares one transformer substation, the transformer substation does not need to be installed in each load power supply device to step down the mains supply, so that the transformer substations can be shared, and the cost of each load power supply device can be saved.
Drawings
Fig. 1 is a schematic structural diagram of a power supply system in the prior art provided by the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a power supply system provided by the present invention;
fig. 3 is a schematic structural diagram of another embodiment of the power supply system provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 2, fig. 2 is a block diagram of a power supply system according to an embodiment of the present invention. The embodiment of the utility model provides a power supply system, including commercial power network 1, transformer substation 2 and at least one load power supply unit 3; wherein the utility grid 1 is connected with a substation 2; the transformer substation 2 is respectively connected with at least one load power supply device 3;
the load power supply device 3 includes a power supply conversion module 31, where the power supply conversion module 31 includes an AC-DC unit 311, a first end of the AC-DC unit 311 is connected to the substation 2, and a second end of the AC-DC unit 311 is used to connect to at least one user device respectively.
Specifically, the substation 2 may be a small substation. The voltage drop to the utility grid 1 by the small-sized substation can reduce the voltage stress input by the AD-DC unit 311 of each load power supply apparatus 3, and thus the AD-DC unit 311 of each load power supply apparatus 3 can be more easily miniaturized. In addition, since each load power supply device 3 shares one substation 2, it is not necessary to install a substation for reducing the voltage of the utility power in each load power supply device 3, so that the substation 2 can be shared, and the cost of each load power supply device 3 can be saved. When the external utility power network 1 is instantaneously dropped or fluctuates severely (such as peak power consumption in summer, power transmission and distribution faults caused by extreme severe weather and the like), the unified transformer substation 2 can be conveniently disconnected, the alternating current network with voltage reduced in an area is safely isolated to perform isolated island operation, more reactive power flows in the system, less reactive power can be supplied to the external utility power network 1 through the transformer substation 2, the impact on the external utility power network 1 can be reduced, and penalty caused by reactive power overrun violation is avoided, or cost is increased by forcibly increasing active power correction equipment APF in the system.
In an alternative embodiment, referring to fig. 3, the power supply system further comprises an ac supply network 4, wherein the ac supply network 4 is connected to the substation 2 at a first end and to at least one of the load power supply devices 3 at a second end.
In particular, the ac supply network 4 may be understood as a transmission network line, which is used to transmit the mains voltage that is reduced by the substation 2.
In an alternative embodiment, the load power supply apparatus 3 further includes an energy storage module 32, and the energy storage module 32 is connected to the third terminal of the power supply conversion module 31.
It will be appreciated that the energy storage module 32 is a device capable of storing and releasing electrical energy, including a battery, a super capacitor, or other device capable of storing or releasing electrical energy. The embodiment of the utility model provides an in, power supply system is the power supply system who takes the energy storage, and when the commercial power was not enough, energy storage module 32 was given the power supply of direct current bus as stand-by power supply, and each user equipment of power receiving end is given electricity by direct current bus to guarantee each user equipment's power supply.
In an alternative embodiment, the power conversion module 31 further includes a first DC-DC unit 312; the first DC-DC unit 312 has a first terminal connected to the energy storage module 32 and a second terminal connected to at least one user device.
In the embodiment of the present invention, the DC voltage output from the energy storage module 32 is boosted or reduced by the first DC-DC unit 312. Specifically, when the energy storage module 32 is in the discharging mode, the first DC-DC unit 312 switches to the boosting mode, so as to boost the voltage output by the energy storage module 32 and transmit the boosted voltage to each user device through the DC bus; when the energy storage module 32 is in the charging mode, the first DC-DC unit 312 switches to a voltage reduction mode, so as to reduce the residual voltage of the utility power and transmit the voltage to the energy storage module 32.
In an alternative embodiment, the load power supply apparatus 3 further includes at least one second DC-DC unit 34, the second DC-DC units 34 correspond to the user devices one by one, the AC-DC unit 311 and the first DC-DC unit 312 are connected to an input terminal of the second DC-DC unit 34 through a common DC bus, and an output terminal of the second DC-DC unit 34 is connected to the user devices.
In the embodiment of the present invention, each user equipment is powered by the DC bus through the respective second DC-DC unit 34, so as to boost the voltage of the DC bus and transmit the boosted voltage to the corresponding user equipment.
In an alternative embodiment, the load power supply apparatus 3 further includes a control module 33, a first terminal of the control module 33 is connected to the AC-DC unit 311, a second terminal is connected to the first DC-DC unit 312, and a third terminal is connected to at least one user device.
In the embodiment of the present invention, the control module 33 is used to drive the AD-DC unit 311 converts the input voltage, and when the load power supply device 3 accesses the ac mains, it controls the AD-DC unit 311 converts the ac mains voltage into the DC power and supplies the DC power to each user equipment through the DC power.
The control module 33 is further configured to charge the energy storage module 32 by using the remaining power capacity of the AD-DC unit 311, specifically, the remaining power capacity output by the AD-DC unit 311 is provided to the first DC-DC unit 312 through the common DC bus, and the first DC-DC unit 312 is driven to step down the voltage of the DC bus, so as to transmit the stepped-down electric energy to the energy storage module 32. Meanwhile, the control module 33 is further configured to control the energy storage module 32 to supply power to the DC bus through the first DC-DC unit 312 when the connected commercial power is disconnected, so as to transmit the electric energy output by the energy storage module 32 to each user equipment through the DC bus.
Furthermore, the control module 33 of each load power supply device 3 may be further connected to the control modules 33 of other load power supply devices 3, and when the utility power is cut off and the energy storage power of any load power supply device 3 is not enough to supply power to the corresponding user equipment, the energy storage module 32 is controlled to output corresponding electric energy to the ac power supply network 4, so as to supply electric energy to the load power supply devices 3 with insufficient power through the ac power supply network 4, thereby realizing the sharing of the energy storage power of each load power supply device 3, and further improving the reliability and stability of power supply in the whole area.
In an alternative embodiment, the energy storage module 32 is any one of a battery and a super capacitor.
The power supply system provided above comprises a utility power network 1, a substation 2 and at least one load power supply device 3; wherein the utility grid 1 is connected with a substation 2; the transformer substation 2 is respectively connected with at least one load power supply device 3; the load power supply device 3 comprises a power supply conversion module 31, the power supply conversion module 31 comprises an AC-DC unit 311, the first end of the AC-DC unit 311 is connected with the transformer substation 2, and the second end is used for being connected with at least one user device respectively, the utility model discloses an access transformer substation 2 in the commercial power and load power supply device 3, on one hand, can step down the commercial power network 1 to reduce the commercial power voltage accessed by each load power supply device 3, thereby can reduce the voltage stress of the AD-DC unit in each load power supply device 3, and then make each load power supply device 3 realize miniaturization more easily; on the other hand, each load power supply device 3 shares one transformer substation 2, and the transformer substation 2 does not need to be arranged on each power supply device to step down the input commercial power, so that the transformer substation 2 can be shared, and the cost of each load power supply device 3 can be saved.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (7)
1. A power supply system, comprising:
the system comprises a commercial power network, a transformer substation and a power supply network, wherein the commercial power network is connected with the transformer substation;
the transformer substation is respectively connected with at least one load power supply device;
the load power supply device comprises a power supply conversion module, the power supply conversion module comprises an AC-DC unit, a first end of the AC-DC unit is connected with the transformer substation, and a second end of the AC-DC unit is respectively connected with at least one user device.
2. The power supply system of claim 1, further comprising an ac supply network having first ends connected to the substation and second ends respectively connected to at least one of the load power supply devices.
3. The power supply system according to claim 1 or 2, wherein the load power supply device further comprises an energy storage module, and the energy storage module is connected with a third end of the power supply conversion module.
4. The power supply system of claim 3 wherein the power conversion module further comprises a first DC-DC unit;
the first end of the first DC-DC unit is connected with the energy storage module, and the second end of the first DC-DC unit is respectively connected with at least one user device.
5. The power supply system of claim 4 wherein said load power supply further comprises at least one second DC-DC unit, said second DC-DC unit in one-to-one correspondence with said user devices, said AC-DC unit and said first DC-DC unit being connected to an input of said second DC-DC unit by a common DC bus, an output of said second DC-DC unit being connected to said user devices.
6. The power supply system of claim 4 wherein said load powering means further comprises a control module having a first terminal connected to said AC-DC unit, a second terminal connected to said first DC-DC unit, and a third terminal connected to at least one user device, respectively.
7. The power supply system of claim 3, wherein the energy storage module is any one of a battery or a super capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106971.9U CN217335082U (en) | 2021-12-10 | 2021-12-10 | Power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123106971.9U CN217335082U (en) | 2021-12-10 | 2021-12-10 | Power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217335082U true CN217335082U (en) | 2022-08-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123106971.9U Active CN217335082U (en) | 2021-12-10 | 2021-12-10 | Power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217335082U (en) |
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2021
- 2021-12-10 CN CN202123106971.9U patent/CN217335082U/en active Active
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