CN218958615U

CN218958615U - Power distribution cabinet

Info

Publication number: CN218958615U
Application number: CN202222418694.3U
Authority: CN
Inventors: 马锐; 郑达; 翁欣狄; 程革
Original assignee: Ningbo Cnit Future Energy Technology Co ltd
Current assignee: Ningbo Cnit Future Energy Technology Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2023-05-02
Anticipated expiration: 2032-09-13

Abstract

The utility model provides a power distribution cabinet which comprises a first power distribution switch (11), a second power distribution switch (12), a third power distribution switch (13), a fourth power distribution switch (14) and an uninterruptible power supply (30); the input end of the first distribution switch (11) is connected with an alternating current power supply (20), and the output end comprises three output ports; the first output port is connected with a first alternating current load (51); the second output port is connected with a first direct current load (61) through a first switching power supply (41) and a second distribution switch (12); the input end of the uninterruptible power supply (30) is connected with a third output port, one output end is connected with a second alternating current load (52) through a third distribution switch (13), and the other output end is connected with a second direct current load (62) through a second switching power supply (42) and a fourth distribution switch (14). When the power grid fails, the power distribution cabinet can supply power for the direct current load and the alternating current load, normal work of the load which is not allowed to fail is ensured, and loss is avoided.

Description

Power distribution cabinet

Technical Field

The utility model relates to a power grid system, in particular to a power distribution cabinet in the power grid system.

Background

In an electrical power system, a power distribution cabinet is used to distribute electrical energy to loads. In practical use, once a power failure occurs, serious damage is caused to some loads, such as a management system, a fire protection system, a safety monitoring system, an alarm system and the like, and the loads are called critical loads, so that the power failure is not allowed during the working period. Short-term power outages have a slightly smaller impact on some loads, such as lighting, air conditioning, etc., than on critical loads, which are referred to as normal loads. The load is further classified into a direct current load and an alternating current load according to the kind of current. Thus, the load can be specifically classified into a general dc load, a general ac load, a critical dc load, and a critical ac load in consideration of the influence of power outage and the kind of current.

At present, most power distribution cabinets adopt alternating current input, alternating current power is distributed to alternating current loads through the power distribution cabinets, and switching power supply equipment is further arranged in the power distribution cabinets to convert alternating current into direct current so as to supply power for the direct current loads. The problems with such a power distribution cabinet are: once a power failure condition is met, the load is immediately powered off, no buffer time is available for circuit maintenance personnel to recover power transmission, so that the influence of the power failure is large, and particularly, the influence and loss on the key load are large.

Disclosure of Invention

Aiming at the current state of the art, the utility model provides a power distribution cabinet which can supply power for a direct current load and an alternating current load when a power grid fails, so as to ensure that the load which is not allowed to fail normally works and avoid loss.

The technical scheme provided by the utility model is as follows: a power distribution cabinet comprises a first power distribution switch 11, a second power distribution switch 12, a third power distribution switch 13, a fourth power distribution switch 14, an uninterruptible power supply 30, a first switching power supply 41 and a second switching power supply 42;

the input end of the first distribution switch 11 is connected with an alternating current power supply 20, and the output end comprises three output ports; the first output port is connected with a first alternating current load 51; the second output port is connected with the input end of the second distribution switch 12 through the first switching power supply 41, and the output end of the second distribution switch 12 is connected with the first direct current load 61; the third output port is connected to the input end of the uninterruptible power supply 30, and the output end of the uninterruptible power supply 30 includes two output ports, one output port is connected to the second ac load 52 through the third power distribution switch 13, the other output port is connected to the input end of the fourth power distribution switch 14 through the second power distribution switch 42, and the output end of the fourth power distribution switch 14 is connected to the second dc load 62.

Preferably, the plug-in box type structural design is adopted, and the plug-in box type structural design is easy to carry and install. As a further preferred, the first distribution switch 11 is denoted as a layer a; the third distribution switch 13 is taken as a layer and is marked as a layer B; the uninterruptible power supply 30 is taken as a layer and is marked as a layer C; the fourth distribution switch 14 and the second switching power supply 42 are taken as a layer and are marked as a layer D; the first switching power supply 41 and the second distribution switch 12 are referred to as an E layer as one layer. More preferably, the arrangement sequence of the layers from top to bottom is as follows: layer A, layer B, layer C, layer D, layer E.

Preferably, the second ac load 52 is a critical ac load, such as an energy management system, a battery management system, a fire engine, etc.

Preferably, the second dc load 62 is a critical dc load, such as a temperature and humidity sensor, a smoke sensor, a temperature sensor, a hydrogen sensor, an audible and visual alarm, etc.

Preferably, the first ac load 51 is a general ac load, such as lighting, air conditioning, or the like.

Preferably, the first dc load 61 is a general dc load, such as a battery pack fan.

An uninterruptible power supply (Uninterruptible Power Supply, abbreviated as UPS) is a power supply with an energy storage battery device, and is mainly used for providing uninterruptible power for equipment with high requirements on power stability, and the main functions of the UPS are shown in fig. 2. In the present utility model, the output of the UPS includes two ports, one for powering the second ac load 52 and the other connected for powering the second dc load 62.

As one implementation, the uninterruptible power supply is integrated with an energy storage battery by a host, the host includes a rectifier module for converting alternating current into direct current, and an inverter module for converting direct current into alternating current.

The utility model integrates the uninterruptible power supply into the power distribution cabinet, and the uninterruptible power supply comprises two output ends, wherein one output end is connected with the second alternating current load 52 through the third power distribution switch 13, and the other output end is connected with the second direct current load 62 through the second switching power supply 42 and the fourth power distribution switch 14, and compared with the prior art, the utility model has the following beneficial effects:

(1) When the power grid works normally, the alternating current power supply 20 supplies power to the first alternating current load 51 through the first distribution switch 11, supplies power to the first direct current load 61 through the first switching power supply 41 and the second distribution switch 12, and simultaneously supplies power to the uninterruptible power supply 30.

When the power grid is working normally, the uninterruptible power supply 30 supplies power to the second ac load 52 through the third distribution switch 13, supplies power to the second dc load 62 through the second switching power supply 42 and the fourth distribution switch 14, and charges the energy storage battery in the uninterruptible power supply 30 and maintains the normal charging voltage. When the power grid suddenly fails, the energy storage battery in the uninterruptible power supply 30 can be used as a power supply to supply power for the second alternating current load 52 and the second direct current load 62, so that the second alternating current load 52 and the second direct current load 62 can continue to work after the power grid fails, the influence and loss caused by the fact that the second alternating current load 52 and the second direct current load 62 cannot work due to the power failure are avoided, and meanwhile, emergency repair is carried out on the power grid by workers to recover normal time.

(2) The UPS has a simple structure, can adopt the existing commercial UPS products or can be integrated by adopting the commercial products, and has the advantages of low cost, easy operation and easy maintenance.

(3) In the message, when the second alternating current load is a key alternating current load and the second direct current load is a key direct current load, the function of uninterrupted power supply for the key load is particularly highlighted, and the serious influence and loss are avoided.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of the main functional structure of the uninterruptible power supply.

Fig. 3 is a schematic diagram of an integrated structure of an uninterruptible power supply in embodiment 1 of the utility model.

The reference numerals in fig. 1 are: the first power distribution switch 11, the second power distribution switch 12, the third power distribution switch 13, the fourth power distribution switch 14, the ac power source 20, the uninterruptible power source 30, the first switching power source 41, the second switching power source 42, the first ac load 51, the second ac load 52, the first dc load 61, and the second dc load 62.

Detailed Description

The present utility model will be described in further detail with reference to the following examples and drawings, and it should be noted that the examples are intended to facilitate the understanding of the present utility model without any limitation thereto.

Example 1:

as shown in fig. 1, the power distribution cabinet includes a first power distribution switch 11, a second power distribution switch 12, a third power distribution switch 13, a fourth power distribution switch 14, an uninterruptible power supply 30, a first switching power supply 41, and a second switching power supply 42.

In the embodiment, the power distribution cabinet adopts a plug-in box type structural design, and takes the first power distribution switch 11 as a first layer and the third power distribution switch 13 as a second layer from top to bottom; the uninterruptible power supply 30 serves as a third layer; the fourth distribution switch 14 and the second switching power supply 42 serve as a fourth layer; the first switching power supply 41 and the second distribution switch 12 serve as a fifth layer.

In this embodiment, the main functional diagram of the uninterruptible power supply is shown in fig. 2, and the uninterruptible power supply includes a rectifier module, an inverter module and an energy storage battery, wherein the rectifier module is used for converting alternating current into direct current, and the inverter module is used for converting direct current into alternating current. When the alternating current at the input end is normal, the rectifier module changes the alternating current into direct current and stores the direct current in the energy storage battery, and meanwhile, the direct current is changed into alternating current through the inverter to be output, so that the load is supplied with power.

In this embodiment, as shown in fig. 3, the uninterruptible power supply is integrated with an energy storage battery, the host computer selects UPS2000-G series from wagons, the energy storage battery may select wagons, or other commercial products.

In this embodiment, when the power grid works normally, the power grid provides the ac power source 20, not only supplies power to the first ac load 51 through the first distribution switch 11, but also supplies power to the first dc load 61 through the first switching power source 41 and the second distribution switch 12, and simultaneously supplies power to the ups 30.

When the power grid works normally, the energy storage battery in the uninterruptible power supply 30 is charged and maintained at a normal charging voltage; the ups 30, on the other hand, supplies power to the second ac load 52 through the third distribution switch 13 and to the second dc load 62 through the second switching power supply 42 and the fourth distribution switch 14.

When the power grid suddenly fails, the energy storage battery in the uninterruptible power supply 30 can be used as a power supply to supply power for the second alternating current load 52 and the second direct current load 62, so that the second alternating current load 52 and the second direct current load 62 can continue to work after the power grid fails, the influence and loss caused by the fact that the second alternating current load 52 and the second direct current load 62 cannot work due to the power failure are avoided, and meanwhile, emergency repair is carried out on the power grid by workers to recover normal time.

In the present embodiment, the first ac load 51 is a general ac load, such as lighting, air conditioning, or the like.

In the present embodiment, the first dc load 61 is a general dc load, such as a battery pack fan.

In this embodiment, the second ac load 52 selects a critical ac load, such as an energy management system, a battery management system, a fire engine, etc., and the second dc load 62 selects a critical dc load, such as a temperature and humidity sensor, a smoke sensor, a temperature sensor, a hydrogen sensor, an audible and visual alarm, etc., so that uninterrupted power supply to the critical ac load and the critical dc load can be ensured, and significant influence and loss caused by power failure can be avoided.

While the foregoing embodiments have been described in detail in connection with the embodiments of the utility model, it should be understood that the foregoing embodiments are merely illustrative of the utility model and are not intended to limit the utility model, and any modifications, additions, substitutions and the like made within the principles of the utility model are intended to be included within the scope of the utility model.

Claims

1. A power distribution cabinet is characterized in that: comprises a first distribution switch (11), a second distribution switch (12), a third distribution switch (13), a fourth distribution switch (14), an uninterruptible power supply (30), a first switching power supply (41) and a second switching power supply (42);

the input end of the first distribution switch (11) is connected with an alternating current power supply (20), and the output end comprises three output ports; the first output port is connected with a first alternating current load (51); the second output port is connected with the input end of a second distribution switch (12) through a first switching power supply (41), and the output end of the second distribution switch (12) is connected with a first direct current load (61); the third output port is connected with the input end of the uninterruptible power supply (30), the output end of the uninterruptible power supply (30) comprises two output ports, one output port is connected with the second alternating current load (52) through the third power distribution switch (13), the other output port is connected with the input end of the fourth power distribution switch (14) through the second power distribution switch (42), and the output end of the fourth power distribution switch (14) is connected with the second direct current load (62).

2. The power distribution cabinet of claim 1, wherein: the power distribution cabinet is of a plug-in box type structure.

3. The power distribution cabinet of claim 2, wherein: the first distribution switch (11) is used as a layer and is marked as a layer A; the third distribution switch (13) is used as a layer and is marked as a layer B; taking the uninterruptible power supply (30) as a layer, and marking the uninterruptible power supply as a layer C; taking the fourth distribution switch (14) and the second switching power supply (42) as one layer, and recording as a layer D; the first switching power supply (41) and the second distribution switch (12) are used as one layer, and are marked as an E layer.

4. A power distribution cabinet as claimed in claim 3, wherein: the arrangement sequence of each layer from top to bottom is as follows: layer A, layer B, layer C, layer D, layer E.

5. The power distribution cabinet of claim 1, wherein: the second ac load (52) is a critical ac load.

6. The power distribution cabinet of claim 5, wherein: the critical ac load is an energy management system, a battery management system, or a fire engine.

7. The power distribution cabinet of claim 1, wherein: the second dc load (62) is a critical dc load.

8. The power distribution cabinet of claim 7, wherein: the key direct current load is a temperature and humidity detector, a smoke detector, a temperature detector, a hydrogen detector or an audible and visual alarm.

9. The power distribution cabinet of claim 1, wherein: the first ac load (51) is a general ac load.

10. The power distribution cabinet of claim 9, wherein: the general ac load is a lighting or air conditioning device.

11. The power distribution cabinet of claim 1, wherein: the first dc load (61) is a normal dc load.

12. The power distribution cabinet of claim 11, wherein: the general dc load is a battery pack fan.

13. The power distribution cabinet of claim 1, wherein: the uninterruptible power supply is integrated with an energy storage battery by a host, the host comprises a rectifier module and an inverter module, the rectifier module is used for converting alternating current into direct current, and the inverter module is used for converting direct current into alternating current.