CN220797869U - Power distribution system and user system - Google Patents
Power distribution system and user system Download PDFInfo
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- CN220797869U CN220797869U CN202322257520.8U CN202322257520U CN220797869U CN 220797869 U CN220797869 U CN 220797869U CN 202322257520 U CN202322257520 U CN 202322257520U CN 220797869 U CN220797869 U CN 220797869U
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Abstract
The utility model belongs to the technical field of power distribution systems, and particularly relates to a power distribution system and a user system. The utility model provides a distribution system includes main power supply, stand-by power supply, auto-change over device, first load and second load, main power supply draws a central line and at least one phase line and all is connected with first load, stand-by load draws a central line and at least one phase line, the central line that stand-by power supply draws connects the second load, the phase line that main power supply drawn out and the phase line that stand-by power supply draw through auto-change over device connects the second load, auto-change over device is used for switching over the second load and is connected with one of main power supply and stand-by power supply. The standby power supply only supplies power to the second load when the main power supply is powered off, so that the power distribution system can ensure redundant power supply to the second load, reduce the capacity of the standby power supply and reduce the cost.
Description
Technical Field
The utility model belongs to the technical field of power distribution systems, and particularly relates to a power distribution system and a user system.
Background
Some of the prior art power distribution systems do not consider redundant power supply of the control loop, resulting in lower reliability of the control loop, and once the power supply is powered off, the entire power distribution system will stop working.
In order to solve the above-mentioned problems, a redundant power supply is configured in the power distribution system in the prior art, but the redundant power supply is configured for the load of the whole system, so that the capacity and the cost of the redundant power supply are high.
Disclosure of utility model
The technical problems to be solved by the utility model are as follows: aiming at the problems that the redundant power supply of the existing power distribution system is configured for the whole system, so that the capacity of the redundant power supply is large and the cost is high, the power distribution system and the user system are provided.
In order to solve the technical problems, in one aspect, the embodiment of the utility model provides a power distribution system, which comprises a main power supply, a standby power supply, a switching device, a first load and a second load, wherein the main power supply is provided with a neutral line and at least one phase line which are both connected with the first load, the standby power supply is provided with a neutral line and at least one phase line, the neutral line which is provided by the standby power supply is connected with the second load, the phase line which is provided by the main power supply and the phase line which is provided by the standby power supply are connected with the second load through the switching device, and the switching device is used for switching the second load to be connected with one of the main power supply and the standby power supply.
Optionally, the switching device is provided with at least one group of conversion contacts, each group of conversion contacts comprises a first static contact, a second static contact and a movable contact, at least one phase line led out by the main power supply is connected with the first static contact of the corresponding group of conversion contacts, and at least one phase line of the standby power supply is connected with the second static contact of the corresponding group of conversion contacts;
when the main power supply is electrified, the movable contact is in contact electrical connection with the first fixed contact; and when the main power supply is powered off, the movable contact is in contact electrical connection with the second stationary contact.
Optionally, the switching device is a contactor, the contactor is provided with only one group of conversion contacts, the standby power supply is single-phase power, the standby power supply only draws out one phase line and one neutral line, the conversion contacts are connected with one phase line drawn out by the main power supply, and the conversion contacts are connected with one phase line drawn out by the standby power supply.
Optionally, the switching device is provided with a plurality of groups of conversion contacts, the main power supply is powered by multiple phases, the main power supply leads out a plurality of phase lines and a central line, the conversion contacts are connected with the phase lines led out by the main power supply in a one-to-one correspondence manner, and the conversion contacts are connected with one phase line of the standby power supply.
Optionally, the switching device is provided with a plurality of groups of switching contacts, the main power supply and the standby power supply are all multiphase power, the main power supply leads out a plurality of phase lines and a central line, the standby power supply leads out a plurality of phase lines and a central line, the switching contacts are in one-to-one correspondence with the phase lines led out by the main power supply, and the switching contacts are in one-to-one correspondence with the phase lines led out by the standby power supply.
Optionally, the neutral line drawn from the main power supply and the neutral line drawn from the standby power supply are collinear and connected to the second load.
Optionally, the system further comprises a UPS, the UPS is connected to the second load and connected in parallel to the backup power source, and the UPS is configured to supply power to the second load when the primary power source and the backup power source are powered off.
Optionally, the power supply further comprises an AC/DC switching power supply, the standby power supply is an AC power supply, the second load comprises a DC load, an input end of the AC/DC switching power supply is connected with the standby power supply, and an output end of the AC/DC switching power supply is connected with the DC load.
Optionally, a fuse is connected in series to a phase line led out by the main power supply and connected to the switching device, and the switching device is used for switching the second load to be connected with the standby power supply when the fuse is disconnected.
Optionally, the power distribution system comprises a main loop and a control loop, the main power supply and the first load are located on the main loop, and the standby power supply and the second load are located on the control loop; the first load is a main load, and the second load is a control load.
In the power distribution system, the connection states of the main power supply and the standby power supply and the second load are switched through the switching device, so that the standby power supply can supply power to the second load in a redundant mode when the main power supply is powered off, uninterrupted operation of the second load is realized, and the reliability of the power distribution system is improved. And the standby power supply only supplies power for the second load in a redundant way, so that the power distribution system reduces the capacity of the standby power supply and reduces the cost while ensuring the redundant power supply for the second load.
In another aspect, an embodiment of the present utility model provides a user system, including the power distribution system described above.
Drawings
FIG. 1 is a schematic diagram of a power distribution system provided in an embodiment of the present utility model;
Reference numerals in the specification are as follows:
1. a main power supply; 2. a standby power supply; 3. a switching device; 4. a fuse; 5. a UPS; 6. an AC/DC switching power supply; 7. a first load; 8. an alternating current load; 9. and (3) a direct current load.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in fig. 1, an embodiment of the present utility model provides a power distribution system, which includes a main power source 1, a standby power source 2, a switching device 3, a first load 7 and a second load, wherein the main power source 1 draws a neutral line and at least one phase line and is connected to the first load 7, the standby power source 2 draws a neutral line and at least one phase line, and the neutral line drawn by the standby power source 2 is connected to the second load 7.
The phase line led out by the main power supply 1 and the phase line led out by the standby power supply 2 are connected with a second load through a switching device 3, and the switching device 3 can switch the connection of the second load with one of the main power supply 1 and the standby power supply 2.
Specifically, when the phase line of the main power supply 1 loses power, the switching device 3 is communicated with the phase line of the standby power supply 2, so that the standby power supply 2 supplies power to the second load, and uninterrupted operation of the second load is ensured. When the main power supply 1 resumes the power supply, the switching device 3 resumes the phase line communication with the main power supply 1, so that the main power supply 1 supplies power to the second load.
The power distribution system is provided with double power supplies, the main power supply 1 supplies power to the second load preferentially, and the standby power supply 2 is started to supply power to the second load in a redundant mode when the main power supply 1 is powered off, so that normal operation of key loads in the power distribution system is guaranteed.
In the power distribution system, the connection states of the main power supply 1 and the standby power supply 2 and the second load are switched through the switching device 3, so that the standby power supply 2 can supply power to the second load in a redundant mode when the main power supply 1 is powered off, and the dual power supply is used for supplying power to the second load, so that the second load can work uninterruptedly, and the reliability of the power distribution system is improved. And because the standby power supply 2 only supplies power for the second load in a redundant way, the power distribution system reduces the capacity of the standby power supply 2 and reduces the cost while ensuring the redundant power supply for the second load.
The first load may be a motor, a lighting device, an air conditioner, etc., and the second load may be a communication device, a camera, a fire power supply, a BMS battery system, a detection device, a control device, etc.
In an embodiment, the switching device 3 has at least one set of switching contacts, each set of switching contacts comprising a first stationary contact, a second stationary contact and a movable contact, at least one phase line of the main power supply 1 is connected to the first stationary contact of the corresponding set of switching contacts, and at least one phase line of the backup power supply 2 is connected to the second stationary contact of the corresponding set of switching contacts.
The movable contact can be switched between the first stationary contact and the second stationary contact to be electrically connected, when the main power supply 1 is electrified, the movable contact is electrically connected with the first stationary contact, a neutral line led out by the main power supply 1 is connected with the second load, so that a conductive loop is formed between the second load and the main power supply 1, and the main power supply 1 can supply power to the second load while supplying power to the first load 7.
When the main power supply 1 is powered off, the movable contact is in contact electrical connection with the second fixed contact, and the central line led out by the standby power supply 2 is connected with the second load, so that a conductive loop is formed between the second load and the standby power supply 2, and the standby power supply 2 can supply power to the second load in a redundant manner. When the main power supply 1 is restored to be energized, the movable contact of the switching device 3 is automatically switched to be in contact electrical connection with the first stationary contact.
In one embodiment, the switching device 3 is a contactor, the contactor has only one set of switching contacts, the standby power supply 2 is single-phase power, the standby power supply 2 only draws one phase line and one neutral line, the switching contacts are connected with one phase line drawn by the main power supply 1, and the switching contacts are connected with one phase line drawn by the standby power supply 2. When the phase line of the main power supply connected with the contactor is in power failure, the contactor is switched to be communicated with the phase line of the standby power supply 2, so that the switching between the main power supply 1 and the standby power supply 2 is realized through a group of switching contacts of the contactor.
As shown in fig. 1, when the main power supply 1 is energized, the contactors are driven, and the contactors 11 and 14 are connected, and the second load is supplied with power from the main power supply 1. When the main power supply 1 is powered down, the contactors are not driven, and the contactors 11 and 12 are turned on, and at this time, the second load is powered by the standby power supply 2.
The second load that needs to operate uninterruptedly is typically a single-phase load, and the standby power supply 2 is only a single-phase load for redundant power supply based on the switching capacity, so as to reduce the capacity of the standby power supply 2.
In one embodiment, the main power source 1 is three-phase four-wire power, the main power source 1 draws three phase lines and a neutral line, and one phase line drawn by the main power source 1 is connected with the contactor.
In other embodiments, the main power source 1 may be two-phase three-phase power or three-phase five-wire power, and the main power source 1 may be single-phase power, for example, one-phase two-wire power.
In other embodiments, the switching device 3 may have multiple sets of switching contacts, where the main power source 1 is multi-phase power, the main power source 1 draws multiple phase lines and a neutral line, the multiple sets of switching contacts are connected to the multiple phase lines drawn by the main power source 1 in a one-to-one correspondence manner, and the multiple sets of switching contacts are all connected to one phase line of the standby power source 2. When any one of the phase lines connected with the switching device 3, which is led out by the main power supply 1, loses power, the switching device 3 can be switched to be connected with one phase line of the standby power supply 2, so that the second load is communicated with the standby power supply 2, and the reliability of the power distribution system is further improved.
In other embodiments, the switching device 3 may have multiple sets of switching contacts, where the main power supply 1 and the standby power supply 2 are all multi-phase, the main power supply 1 draws multiple phase lines and a neutral line, the standby power supply 2 draws multiple phase lines and a neutral line, the multiple sets of switching contacts are connected in one-to-one correspondence with the multiple phase lines drawn by the main power supply 1, and the multiple sets of switching contacts are connected in one-to-one correspondence with the multiple phase lines drawn by the standby power supply 2.
In an embodiment, the neutral line led out by the main power supply 1 and the neutral line led out by the standby power supply 2 are collinear and connected with the second load, and because load switching is required when the power distribution system switches power sources, if the neutral line is disconnected, the switching moment can cause the neutral line to be instantaneously opened due to asynchronous arc extinguishing time of the phase line and the neutral line, and when the switching moment is serious, the single-phase load can be burnt due to instantaneous voltage rise. Therefore, the neutral line led out by the main power supply 1 and the neutral line led out by the standby power supply 2 are collinear, and the neutral line is continuous in the switching process, so that the voltages of all phases are ensured to be approximately symmetrical, the voltage is not increased or reduced when the load is unbalanced, and if one phase line is disconnected, the voltages of the other two phases are unchanged.
Compared with an ATS (Automatic TRANSFER SWITCHING equipmen, automatic transfer switching device) having a plurality of groups of transfer contacts, wherein one group of transfer contacts switches a neutral line led out by a main power supply 1 and a neutral line led out by a standby power supply 2, in the transfer process, the neutral line is disconnected, and the neutral line and the phase line are required to be synchronously extinguished by a controller of the ATS.
In one embodiment, the power distribution system further comprises a UPS5 (Uninterruptible Power Supply ), wherein the UPS5 is connected to the second load and connected in parallel with the standby power source 2, and the UPS5 is capable of supplying power to the second load when the main power source 1 and the standby power source 2 are powered off, so as to further improve reliability of the power distribution system.
In one embodiment, the UPS5 is an ac power source, the second load includes an ac load 8, and the UPS5 is capable of powering the ac load 8 when the primary power source 1 and the backup power source 2 are powered down. At this time, the second load is classified according to the criticality of the second load, the standby power supply 2 supplies power to the second load when the main power supply 1 is powered off, and the UPS5 supplies power to only the ac load 8 with higher criticality when the main power supply 1 and the standby power supply 2 are powered off, so as to reduce the capacity of the UPS 5.
In an embodiment, the standby power supply 2 is an AC power supply, the second load includes a DC load 9, an input terminal of the AC/DC switching power supply 6 is connected to the standby power supply 2, and an output terminal of the AC/DC switching power supply 6 is connected to the DC load 9. The AC/DC switching power supply 6 reduces an Alternating Current (AC) input voltage outputted from the standby power supply 1 to a value more suitable for an intended application through a transformer, and then rectifies the reduced Alternating Current (AC) voltage into a Direct Current (DC) voltage to supply power to the direct current load 9.
It should be noted that, the AC/DC switching power supply 6 may also be used in combination with the UPS5, where the input end of the AC/DC switching power supply 6 may be connected to the UPS5, where the UPS5 is an AC power supply, and the AC/DC switching power supply 6 rectifies an AC (AC) voltage output by the UPS5 into a Direct Current (DC) voltage, so that the UPS5 can supply power to the direct current load 9, and improve the reliability of the operation of the direct current load 9.
In other embodiments, the standby power supply 2 may be DC power to supply power to the DC load 9, where the standby power supply 2 may be connected to a DC/DC converter, an input end of the DC/DC converter is connected to the standby power supply 2, an output end of the DC/DC converter is connected to the DC load 9, and the DC power output by the standby power supply 1 is adjusted to be DC power with a voltage value suitable for an intended application by the DC/DC converter to supply power to the DC load 9.
In an embodiment, the fuse 4 is connected in series to the phase line of the connection switching device 3 led out from the main power supply 1, and the switching device 3 is used for switching the second load to be connected with the standby power supply 2 when the fuse 4 is disconnected through overcurrent and short-circuit protection by the fuse 4.
It should be noted that a sensor may be disposed at a position adjacent to the fuse 4, an output end of the sensor is connected to the switching device 3, and after the sensor transmits a signal that the fuse 4 is disconnected to the switching device 3, the switching device 3 switches the second load to be connected to the standby power supply 2.
In one embodiment, the power distribution system comprises a main loop and a control loop, wherein the main power supply 1 and the first load 7 are positioned on the main loop, and the standby power supply 2 and the second load are positioned on the control loop; wherein the first load 7 is a main load and the second load is a control load.
The main loop provides power and driving force for the controlled object, the control loop can monitor the state or parameter of the controlled object so as to control the main loop to change the state or parameter of the controlled object, and once the control loop is powered off, the whole power distribution system stops working. Therefore, to ensure proper operation of the power distribution system, a portion of the control load on the control loop needs to operate uninterrupted. The main load may be a motor, a lighting device, an air conditioner, etc., and the control load may be a BMS (battery MANAGEMENT SYSTEM ), a BDU (Battery energy Distribution Unit, battery energy distribution unit), a PCS (Power Conversion System, energy storage converter), etc.
In other embodiments, the switching means 3 may be a knife switch.
In other embodiments, the switching device 3 is an ATS (Automatic TRANSFER SWITCHING equipmen, automatic switching device) and may have two sets of switching contacts, where one set of switching contacts switches one phase line led out by the main power supply 1 and one phase line led out by the standby power supply 2, and the other set of switching contacts switches a neutral line led out by the main power supply 1 and a neutral line led out by the standby power supply 2, specifically, a first stationary contact of the same set of switching contacts is connected with the neutral line led out by the main power supply 1, a second stationary contact is connected with the neutral line led out by the standby power supply 2, a movable contact is connected with a second load, and a controller of the ATS controls a switching sequence of each contact.
In other embodiments, a plurality of contactors may be provided, and a plurality of phase lines led out from the main power source 1 are connected to the plurality of contactors in a one-to-one correspondence manner, so that the phase lines of the standby power source 2 can be matched with the plurality of phase lines led out from the main power source 1.
For example, two contactors may be provided, where the standby power supply 2 is two-phase, and two phase lines are led out from the standby power supply 2, and each contactor is connected to one phase line led out from the standby power supply 2 and one phase line led out from the main power supply 1, so that the switching contact of each contactor can switch one phase line led out from the standby power supply 2 and one phase line led out from the main power supply 1.
In addition, an embodiment of the present utility model provides a user system, which may be a vehicle or an energy storage system, including the power distribution system of the above embodiment.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (11)
1. The utility model provides a distribution system, its characterized in that includes main power supply (1), stand-by power supply (2), auto-change over device (3), first load (7) and second load, a central line and at least one phase line are drawn forth to main power supply (1) and all are connected with first load (7), a central line and at least one phase line are drawn forth to stand-by power supply (2), the central line that stand-by power supply (2) was drawn forth is connected the second load, the phase line that main power supply (1) was drawn forth with the phase line that stand-by power supply (2) was drawn forth is passed through auto-change over device (3) is connected the second load, auto-change over device (3) are used for switching over the second load with one of main power supply (1) and stand-by power supply (2) is connected.
2. The power distribution system according to claim 1, characterized in that the switching device (3) has at least one set of conversion contacts, each set of conversion contacts comprising a first stationary contact, a second stationary contact and a movable contact, at least one phase line of the main power supply (1) being connected to the first stationary contact of the corresponding set of conversion contacts, at least one phase line of the backup power supply (2) being connected to the second stationary contact of the corresponding set of conversion contacts;
when the main power supply (1) is electrified, the movable contact is in contact electrical connection with the first fixed contact; when the main power supply (1) is powered off, the movable contact is in contact electrical connection with the second stationary contact.
3. The power distribution system according to claim 2, characterized in that the switching device (3) is a contactor having a set of switching contacts, the backup power source (2) is single-phase power, the backup power source (2) draws one phase line and one neutral line, the switching contacts are connected with one phase line drawn by the main power source (1), and the switching contacts are connected with one phase line drawn by the backup power source (2).
4. The power distribution system according to claim 2, wherein the switching device (3) has a plurality of groups of switching contacts, the main power supply (1) is multi-phase power, the main power supply (1) draws out a plurality of phase lines and a neutral line, the plurality of groups of switching contacts are connected in one-to-one correspondence with the plurality of phase lines drawn out by the main power supply (1), and the plurality of groups of switching contacts are connected with one phase line of the standby power supply (2).
5. The power distribution system according to claim 2, wherein the switching device (3) has a plurality of groups of switching contacts, the main power supply (1) and the standby power supply (2) are multiphase power, the main power supply (1) draws out a plurality of phase lines and a neutral line, the standby power supply (2) draws out a plurality of phase lines and a neutral line, the plurality of groups of switching contacts are connected in one-to-one correspondence with the plurality of phase lines drawn out by the main power supply (1), and the plurality of groups of switching contacts are connected in one-to-one correspondence with the plurality of phase lines drawn out by the standby power supply (2).
6. The power distribution system of claim 1, wherein a neutral line drawn from the main power source (1) and a neutral line drawn from the backup power source (2) are collinear and connected to the second load.
7. The power distribution system of any of claims 1 to 6, further comprising a UPS (5), the UPS (5) being connected to the second load and in parallel with the backup power source (2), the UPS (5) being configured to power the second load when the primary power source (1) and backup power source (2) are powered down.
8. The power distribution system according to any one of claims 1 to 6, further comprising an AC/DC switching power supply (6), the backup power supply (2) being an AC power supply, the second load comprising a DC load (9), an input of the AC/DC switching power supply (6) being connected to the backup power supply (2), an output of the AC/DC switching power supply (6) being connected to the DC load (9).
9. The power distribution system according to any of claims 1 to 6, characterized in that a fuse (4) is connected in series to a phase line leading out from the main power supply (1) and connected to the switching device (3), the switching device (3) being adapted to switch the second load into connection with the backup power supply (2) when the fuse (4) is opened.
10. The power distribution system according to claim 1, characterized in that it comprises a main circuit on which the main power supply (1) and the first load (7) are located and a control circuit on which the backup power supply (2) and the second load are located; the first load (7) is a main load, and the second load is a control load.
11. A consumer system comprising the power distribution system of any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257520.8U CN220797869U (en) | 2023-08-21 | 2023-08-21 | Power distribution system and user system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322257520.8U CN220797869U (en) | 2023-08-21 | 2023-08-21 | Power distribution system and user system |
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| Publication Number | Publication Date |
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| CN220797869U true CN220797869U (en) | 2024-04-16 |
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| CN202322257520.8U Active CN220797869U (en) | 2023-08-21 | 2023-08-21 | Power distribution system and user system |
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| CN (1) | CN220797869U (en) |
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- 2023-08-21 CN CN202322257520.8U patent/CN220797869U/en active Active
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