CN210806740U - Three-way low-voltage power supply device and power supply system - Google Patents

Abstract

The utility model is applicable to the technical field of low-voltage power supply, and provides a three-way low-voltage power supply device and a power supply system. The mains is connected to one end of each power supply output line section through the mains transmission line section, and the generator is connected to each power supply through the generator output line section. One end of the output line segment, the emergency power supply is connected to one end of each power output line segment through the emergency power supply transmission line segment, and the other end of each power output line segment is connected to the corresponding power outlet. The three-way low-voltage power supply device and the power supply system provided by the embodiment of the present invention are provided with three-way power supply incoming lines, which are respectively: the mains power supply, the generator power supply and the emergency power supply. The power supply is provided by the emergency power supply to meet the continuous power supply demand of the power load, realize the provision of stable and continuous power supply, improve the reliability of power supply, and ensure the reliable operation of important load equipment.

Description

A three-way low-voltage power supply device and power supply system

technical field

The application belongs to the technical field of low-voltage power supply, and in particular relates to a three-way low-voltage power supply device and a power supply system.

Background technique

At present, the role of power supply and distribution infrastructure in the modernization construction is becoming more and more prominent, and it also puts forward higher requirements for the continuity, safety, reliability and stability of power supply. Large-scale data centers, banks, financial centers, industrial and mining enterprises, hospitals, schools, scientific research institutes and other departments have higher and higher requirements for the continuity of power supply, which makes the market for emergency power supply equipment flourish and is widely used in various industries and fields, and even Residential electricity. However, the traditional load low-voltage power distribution equipment mostly uses two power sources: the mains power supply and the generator power supply. When one of the power sources fails, the other power source is turned on to ensure continuous power supply. The existing power supply device has the following problems: if the two power sources of the mains and the generator fail at the same time, it will cause a power outage accident, and the important loads connected to it will stop running, which will cause heavy economic losses, and may even cause damage. Personal injury is immeasurable.

Utility model content

In view of this, the embodiments of the present application provide a three-way low-voltage power supply device and a power supply system, so as to solve the problem that when the mains and the generator fail at the same time in the prior art, the traditional power supply device cannot supply power normally, resulting in the reliability of power supply. low problem.

A first aspect of the embodiments of the present application provides a three-way low-voltage power supply device, including:

Mains access terminal for connecting to mains;

Generator access terminal for connecting the generator;

Emergency power access terminal for connecting to emergency power;

At least one power outlet;

Mains transmission line section;

Generator output line section;

Sections of emergency power transmission lines; and

At least one power output line segment corresponding to each power outlet;

The mains access end is connected to one end of each power output line segment through the mains transmission line segment, the generator access end is connected to one end of each power output line segment through the generator output line segment, and the emergency The power input terminal is connected to one end of each power output line segment through the emergency power transmission line segment, and the other end of each power output line segment is connected to the corresponding power outlet terminal.

Further, the emergency power supply access terminal is an emergency power socket adapted to the emergency power output plug of the emergency power supply.

Further, the three-way low-voltage power supply device further includes an emergency power access cabinet, the emergency power access cabinet includes a cabinet body, the cabinet body is provided with a cabinet door, and the emergency power socket is fixedly arranged in the cabinet. in vivo.

Further, circuit breakers are provided on the mains transmission line section, the generator output line section and each power output line section.

Further, the three-way low-voltage power supply device further includes a reactive power dynamic compensator, and the reactive power dynamic compensator is connected to the mains transmission line section.

Further, the three-way low-voltage power supply device further includes a surge protector, and the surge protector is connected to the mains transmission line section.

A second aspect of the embodiments of the present application provides a three-way low-voltage power supply system, including:

dynamo;

emergency power; and

The three-way low-voltage power supply device provided by the first aspect of the above embodiments of the present application.

The beneficial effect of the embodiment of the present utility model compared with the prior art is that the three-way low-voltage power supply device and the power supply system provided by the embodiment of the present utility model are provided with three-way power supply incoming lines, which are respectively: the mains power supply, the generator power supply and the Emergency power supply, when the mains and generator fail to supply power at the same time, the emergency power supply is activated, and the emergency power supply provides electric energy to meet the continuous power supply demand of the power load, realize the provision of stable and continuous power supply, improve the reliability of power supply, and ensure important The load equipment operates reliably.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of a circuit structure of a three-way low-voltage power supply device provided by an embodiment of the present application;

2 is a schematic structural diagram of an emergency power socket in a three-way low-voltage power supply device provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a circuit structure of a three-way low-voltage power supply system provided by an embodiment of the present application.

Detailed ways

In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It is to be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described feature, integer, step, operation, element and/or component, but does not exclude one or more other features , whole, step, operation, element, component and/or the presence or addition of a collection thereof.

It should also be understood that the terminology used in the specification of the present application herein is for the purpose of describing particular embodiments only and is not intended to limit the present application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural unless the context clearly dictates otherwise.

In order to illustrate the technical solutions described in the present application, specific embodiments are used to describe the following.

Referring to FIG. 1 , it is a schematic diagram of a circuit structure of a three-way low-voltage power supply device provided by Embodiment 1 of the present application. As shown in FIG. 1 , the three-way low-voltage power supply device includes: a mains access terminal 11 , a generator access terminal 12 , an emergency power supply access terminal 13 and at least one power outlet terminal 14 . Among them, the mains access terminal 11 is used to connect with external mains (usually, the mains is 220V AC) to input the mains; the generator access terminal 12 is used to connect to the generator to input The electric energy generated by the generator; the emergency power supply access terminal 13 is used to connect with the emergency power supply to input the electric energy output by the emergency power supply; the power outlet terminal 14 is the power output terminal of the three-way low-voltage power supply device, and the specific number depends on the actual number Power needs to be decided.

The three-way low-voltage power supply device also includes related line segments, which are a mains transmission line segment, a generator output line segment, an emergency power supply transmission line segment, and at least one power output line segment corresponding to each power outlet 14 . The mains access terminal 11 is connected to one end of each power output line segment through the mains transmission line segment, the generator access terminal 12 is connected to one end of each power output line segment through the generator output line segment, and the emergency power supply access terminal 13 is connected to one end of each power output line segment through the generator output line segment. The emergency power transmission line segment is connected to one end of each power output line segment, and the other end of each power output line segment is connected to the corresponding power outlet terminal 14 .

In one embodiment, as shown in FIG. 2 , the emergency power access terminal 13 is an emergency power socket (hereinafter referred to as the emergency power socket 13 ), and the emergency power socket 13 is adapted to the emergency power output plug of the emergency power supply. The emergency power output plug can be properly inserted into the emergency power socket 13. In the form of a socket, the connection and disconnection with the emergency power supply can be facilitated, and the power transmission can be reliably ensured. Of course, as other implementations, other types of electrical connectors, such as aviation plugs, can also be used to connect with the emergency power supply. connect.

In one embodiment, the three-way low-voltage power supply device further includes an emergency power supply access cabinet, the emergency power supply access cabinet includes a cabinet body, the cabinet body is provided with a cabinet door, and the emergency power socket 13 is fixedly arranged in the cabinet body. Of course, in order to ensure For safe power supply, the emergency power socket 13 needs to be insulated from the cabinet. Setting the emergency power access cabinet can prevent the emergency power socket 13 from being exposed to the outside, which can not only reduce the degree of the emergency power socket 13 being affected by the external environment (such as rain and snow), and increase the service life of the emergency power socket 13, but also can avoid related Electric shock accidents occur to personnel, improve the safety of power supply. In addition, prominent signs can be made on the cabinet door, such as: "emergency power access unit". Of course, whether to set up an emergency power access cabinet is affected by factors such as the capacity of the emergency power supply, the site environment, and the installation location. In addition, the emergency power socket 13 can be installed on the copper bar (the copper bar needs to meet the current carrying capacity of the emergency power supply), and is connected to the emergency power transmission line section through the copper bar.

In one embodiment, both the mains transmission line section and the emergency power transmission line section can be composed of conventional transmission lines and busbar sections. As shown in FIG. 1 , the conventional transmission line section in the mains transmission line section may also be provided with a transformer, which can Convert incoming alternating current to alternating current of the desired voltage level. In addition, circuit breakers can also be arranged at corresponding positions in the mains transmission line section, the generator output line section and each power supply output line section to facilitate the input and cut-off of the relevant power sources. Of course, a circuit breaker can also be provided on the emergency power transmission line section. In addition, as another implementation manner, switching of the power source can also be realized without arranging a circuit breaker, for example, directly controlling whether the generator or the emergency power source is running to control whether the generator or the emergency power source is turned on.

Regardless of the specific structure of the emergency power access terminal 13, the three-way low-voltage power supply device also includes a reactive power dynamic compensator 15, which is connected to the mains transmission line section to facilitate reactive power dynamic compensation and ensure power quality. The reactive power dynamic compensator 15 is an existing device, and will not be described in detail here. In one embodiment, a fuse may also be provided on the connection line between the reactive power dynamic compensator 15 and the mains transmission line section, so as to play a certain protective effect on the reactive power dynamic compensator 15 .

Regardless of the specific structure of the emergency power supply access terminal 13, the three-way low-voltage power supply device further includes a surge protector 16, and the surge protector 16 is connected to the mains transmission line section. The surge protector 16 is an existing device, and will not be described in detail here. When a peak current or voltage is suddenly generated due to external interference, the surge protector 16 can conduct and divert the current in a very short period of time, so as to avoid damage to other devices in the line caused by the surge.

Under normal circumstances, the mains power supply is used for power supply. When the mains power supply fails or fails, it is switched to the generator for power supply. Moreover, when the generator fails and the mains power is not sufficient to restore the power supply, the emergency power supply is activated, and the third-way power supply scheme is realized through the emergency power supply, so as to realize the three-way power supply of mains, generator and emergency power supply to ensure continuous power supply. .

In addition, the switching control between the mains and the generator, as well as the input control of the emergency power supply when the generator fails and the mains does not meet the recovery of power supply, can be manually controlled and switched, or through the controller and the controller. The switching program realizes automatic control switching. Of course, what the present application protects is the hardware structure of the three-way low-voltage power supply device, not the switching method and switching strategy involved therein.

Referring to FIG. 3 , it is a schematic diagram of a circuit structure of a three-way low-voltage power supply system provided by Embodiment 2 of the present application. As shown in FIG. 3 , the three-way low-voltage power supply system includes: a generator 22 , an emergency power supply 23 and a three-way low-voltage power supply device. The three-way low-voltage power supply device includes: a mains access terminal 21 , a generator access terminal, an emergency power access terminal, and at least one power outlet terminal 24 . Among them, the mains access terminal 21 is used to connect with the external mains (usually, the mains is 220V AC) to input the mains; the generator access terminal is connected to the generator 22 to input the generator The emergency power input terminal is connected with the emergency power supply 23 to input the power output by the emergency power supply; the power outlet terminal 24 is the power output terminal of the three-way low-voltage power supply device, that is, the power output of the three-way low-voltage power supply system The specific number of terminals is determined by the actual power supply needs. The generator 22 can be a conventional generator, such as a diesel generator; the emergency power supply 23 can be a conventional emergency power supply device, such as a UPS power supply.

The three-way low-voltage power supply device also includes related line segments, which are a mains transmission line segment, a generator output line segment, an emergency power supply transmission line segment, and at least one power output line segment corresponding to each power outlet 24 . Among them, the mains access terminal 21 is connected to one end of each power output line section through the mains transmission line section, the generator 22 is connected to one end of each power output line section through the generator output line section, and the emergency power supply 23 is connected to each power output line section through the emergency power transmission line section. One end of the power output line segment, and the other end of each power output line segment is connected to the corresponding power outlet terminal 24 .

In one embodiment, as shown in FIG. 2 , the access end of the emergency power supply is an emergency power socket (hereinafter referred to as an emergency power socket), and the emergency power socket is adapted to the emergency power output plug of the emergency power supply 23 . The emergency power outlet plug can be properly inserted into the emergency power socket. In the form of a socket, the connection and disconnection with the emergency power supply 23 can be facilitated, and the power transmission can be reliably ensured. Of course, as other implementations, other types of electrical connectors, such as aviation plugs, can also be used for connecting with the emergency power supply. connected.

In one embodiment, the three-way low-voltage power supply device further includes an emergency power supply access cabinet, the emergency power supply access cabinet includes a cabinet body, the cabinet body is provided with a cabinet door, and the emergency power socket is fixedly arranged in the cabinet body. Of course, in order to ensure the power supply Safety, emergency power sockets need to ensure insulation with the cabinet. Setting up an emergency power access cabinet can prevent the emergency power socket from being exposed to the outside, which can not only reduce the impact of the emergency power socket on the external environment (such as rain and snow), increase the service life of the emergency power socket, but also avoid electric shocks to relevant personnel. Accidents, improve power supply security. In addition, prominent signs can be made on the cabinet door, such as: "emergency power access unit". Of course, whether to set up an emergency power access cabinet is affected by factors such as the capacity of the emergency power supply, the site environment, and the installation location. In addition, the emergency power socket can be installed on the copper bar (the copper bar needs to meet the current carrying capacity of the emergency power supply), and is connected to the emergency power transmission line section through the copper bar.

In one embodiment, both the mains transmission line section and the emergency power transmission line section can be composed of conventional transmission lines and busbar sections. As shown in FIG. 3 , the conventional transmission line section in the mains transmission line section may also be provided with a transformer, which can Convert incoming alternating current to alternating current of the desired voltage level. In addition, circuit breakers can also be arranged at corresponding positions in the mains transmission line section, the generator output line section and each power supply output line section to facilitate the input and cut-off of the relevant power sources. Of course, a circuit breaker can also be provided on the emergency power transmission line section. In addition, as another implementation manner, switching of the power source can also be realized without arranging a circuit breaker, for example, directly controlling whether the generator 22 or the emergency power source 23 is running to control whether the generator 22 or the emergency power source 23 is turned on.

Regardless of the specific structure of the emergency power supply access terminal, the three-way low-voltage power supply device also includes a reactive power dynamic compensator 25, which is connected to the mains transmission line section to facilitate reactive power dynamic compensation and ensure power quality. The reactive power dynamic compensator 25 is an existing device, and will not be described in detail here. In one embodiment, a fuse may also be provided on the connection line between the reactive power dynamic compensator 25 and the commercial power transmission line segment, so as to play a certain protective effect on the reactive power dynamic compensator 25 .

Regardless of the specific structure of the emergency power supply access terminal, the three-way low-voltage power supply device further includes a surge protector 26, and the surge protector 26 is connected to the commercial power transmission line section. The surge protector 26 is an existing device and will not be described in detail here. When a peak current or voltage is suddenly generated due to external interference, the surge protector 26 can conduct and divert the current in a very short period of time, so as to avoid damage to other devices in the line caused by the surge.

For the description of the specific structure, working principle and process of the three-channel low-voltage power supply system, reference may be made to the relevant description of the technical solution of the three-channel low-voltage power supply device provided above, which will not be repeated here.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that the above-mentioned implementations can still be used for Modifications are made to the technical solutions recorded in the method, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application, and should be included in the within the scope of protection of this application.

Claims (6)

1. A three-way low voltage power supply, comprising:

the mains supply access end is used for connecting a mains supply;

the generator access end is used for connecting a generator;

the emergency power supply access end is used for connecting an emergency power supply;

at least one power outlet terminal;

a commercial power transmission line section;

a generator output line section;

an emergency power transmission line section; and

at least one power output line section corresponding to each power outlet end;

the utility power input end is connected with one end of each power output line section through the utility power transmission line section, the generator input end is connected with one end of each power output line section through the generator output line section, the emergency power input end is connected with one end of each power output line section through the emergency power transmission line section, and the other end of each power output line section is connected with the corresponding power outlet end;

the three-way low-voltage power supply device further comprises a reactive dynamic compensator, and the reactive dynamic compensator is connected with the commercial power transmission line section.

2. The three-way low-voltage power supply device according to claim 1, wherein the emergency power inlet is an emergency power outlet adapted to an emergency power outlet plug of an emergency power supply.

3. The three-way low-voltage power supply device according to claim 2, further comprising an emergency power supply access cabinet, wherein the emergency power supply access cabinet comprises a cabinet body, a cabinet door is disposed on the cabinet body, and the emergency power socket is fixedly disposed in the cabinet body.

4. A three-way low-voltage power supply according to any one of claims 1-3, characterized in that circuit breakers are arranged on the mains electricity transmission line section, the generator output line section and each power output line section.

5. The three-way low-voltage power supply according to any of claims 1-3, characterized in that it further comprises a surge protector, said surge protector being connected to said mains transmission line section.

6. A power supply system, comprising:

a generator;

an emergency power supply; and

a three-way low voltage power supply as claimed in any one of claims 1 to 5.

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