CN112018859A

CN112018859A - Charging cabinet, replacing method thereof and direct-current power supply system

Info

Publication number: CN112018859A
Application number: CN202010913779.1A
Authority: CN
Inventors: 吴森飚; 张同兴; 邱烨
Original assignee: Guangzhou Zhujiang Natural Gas Power Generation Co ltd
Current assignee: Guangzhou Zhujiang Natural Gas Power Generation Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2020-12-01

Abstract

The invention discloses a charging cabinet, which comprises a cabinet body, a charger group, a storage battery monitoring module, a direct current monitoring module, an alternating current monitoring module, a control switch and a communication switch, wherein the charger group is arranged on the cabinet body; the storage battery monitoring module, the direct current monitoring module, the alternating current monitoring module and the charger group are respectively detachably mounted on the cabinet body; the interconnection switch is used for connecting the first section of direct current bus and the second section of direct current bus; the direct current monitoring module is used for being connected with a first section of direct current bus; the charger group is connected with the first section of direct current bus through the control switch; the alternating current monitoring module is used for being connected with the alternating current input device and is connected with the charger group through the double-path automatic switching device; the storage battery monitoring module is respectively connected with the charger group and the storage battery pack. The invention integrates the direct current charger and each monitoring module, carries out standardized design, and has flexible, compact and beautiful structure and perfect functions; and the direct current system does not need to have a power failure, can carry out 'core change' to the direct current screen that charges, has realized that the direct current system reforms transform the screen cabinet that charges on line.

Description

Charging cabinet, replacing method thereof and direct-current power supply system

Technical Field

The invention relates to the technical field of electric power, in particular to a charging cabinet, a replacing method thereof and a direct current power supply system.

Background

The charger of the direct current system is generally used for 10 years, the failure rate is high after the charger is used, the original product is updated, spare parts are stopped producing, and the charger and other accessories need to be modified and replaced. The traditional method for modifying and replacing is to replace the whole screen of the screen cabinet where the charger, the alternating current and direct current monitoring module and other accessories are located.

Loads carried by a direct-current system of a power grid enterprise are extremely important, such as a direct-current oil pump, a UPS (uninterrupted power supply), a relay protection device and the like, and the direct-current system is generally not allowed to quit operation. However, when the conventional charger cabinet is replaced, the conventional charger cabinet needs to be withdrawn from the operation of the direct current system, and the construction can be performed only by stopping running all direct current loads, so that the online transformation cannot be performed, and thus, certain influence is caused on the safety production of power enterprises.

Disclosure of Invention

The invention aims to provide a charging cabinet, a replacing method thereof and a direct current power supply system, and aims to solve the problems that when the integral screen cabinet of a charger is replaced in the prior art, the direct current system is required to be quit from running, all direct current loads can be stopped to carry out construction, and online reconstruction cannot be carried out.

To achieve the above object, an embodiment of the present invention provides a charging cabinet, including: the intelligent charging system comprises a cabinet body, a charger group, a storage battery monitoring module, a direct current monitoring module, an alternating current monitoring module, a control switch and a communication switch;

the storage battery monitoring module, the direct current monitoring module, the alternating current monitoring module and the charger group are respectively detachably mounted on the cabinet body;

the interconnection switch is used for connecting the first section of direct current bus and the second section of direct current bus;

the direct current monitoring module is used for being connected with the first section of direct current bus;

the charger group is connected with the first section of direct current bus through the control switch;

the alternating current monitoring module is used for being connected with an alternating current input device and is connected with the charger group through a double-path automatic switching device;

the storage battery monitoring module is respectively connected with the charger group and the storage battery pack.

In one embodiment, the control switch comprises a first switch, a second switch and a third switch;

the charger group is connected with the first section of direct current bus through the first switch;

the storage battery pack is connected with the first section of direct current bus through the second switch and is connected with the charger group through the third switch.

In one embodiment, the charging cabinet further comprises a touch screen and a touch screen monitoring module, the touch screen is connected with the touch screen monitoring module, and the touch screen monitoring module is in communication connection with the storage battery monitoring module, the direct current monitoring module and the alternating current monitoring module respectively.

In a certain embodiment, the cabinet body is formed with a plurality of cabinet lattices, the plurality of cabinet lattices are arranged in rows, the charger group comprises a plurality of chargers, and the plurality of chargers are arranged in at least one row of the cabinet lattices in parallel.

In one embodiment, the plurality of chargers in each row of the cabinet are sized to fit the size of a single row of the cabinet.

In one embodiment, the storage battery monitoring module, the direct current monitoring module and the alternating current monitoring module are arranged in at least one row of the cabinet lattices.

In one embodiment, the ac monitoring module and the dc monitoring module are disposed side by side in the same row of the cabinet grid and above the charger group.

In one embodiment, the cabinet body further comprises a front panel and a back panel, the front panel is arranged on the front surface of the cabinet body, the back panel is arranged on the back surface of the cabinet body, and the back panel is provided with a plurality of heat dissipation holes.

The embodiment of the invention also provides a method for replacing the charging cabinet, which is applied to the charging cabinet in any one of the embodiments, and the method comprises the following steps:

respectively controlling and disconnecting the connection between the direct current monitoring module and a first section of direct current bus, the connection between the charger group and the first section of direct current bus and the connection between the storage battery group and the first section of direct current bus;

and controlling the first section of direct current bus to be connected to a second section of direct current bus, and controlling the second section of direct current bus to supply power.

An embodiment of the present invention further provides a dc power supply system, including: the charging cabinet comprises a first section of direct current bus, a second section of direct current bus, an alternating current input device, a storage battery pack and the charging cabinet in any one of the above embodiments, wherein the charging cabinet is respectively connected with the first section of direct current bus, the second section of direct current bus, the alternating current input device and the storage battery pack.

Compared with the prior art, the charging cabinet provided by the embodiment of the invention has the following advantages:

(1) the direct current charger and each monitoring module are integrated and are designed into a charging module cabinet in a standardized manner, so that the charging module cabinet is flexible in structure, compact and attractive, and complete in function.

(2) On the basis of not changing the original screen cabinet, the direct current system does not need to be powered off, the direct current charging screen can be subjected to core changing, and the direct current system is transformed into the charging screen cabinet on line.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of electrical connections of a charging cabinet according to an embodiment of the present invention;

fig. 2 is a schematic front structural diagram of a charging cabinet according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a back structure of a charging cabinet according to an embodiment of the present invention.

Description of the main elements and symbols:

100. a charging cabinet; 10. a cabinet body; 11. a cabinet grid; 12. a front panel; 13. a back panel; 20. a charger group; 30. a battery monitoring module; 40. a DC monitoring module; 50. an alternating current monitoring module; 60. a control switch; 61. a first switch; 62. a second switch; 63. a third switch; 70. a tie switch; 80. a touch screen; 210. a first section of direct current bus; 220. a second section of direct current bus; 300. an AC input device; 400. a battery pack; 1000. a DC power supply system.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.

It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1 to 3, an embodiment of the invention provides a charging cabinet 100, including: the intelligent charging system comprises a cabinet body 10, a charger group 20, a storage battery monitoring module 30, a direct current monitoring module 40, an alternating current monitoring module 50, a control switch 60 and a communication switch 70.

The storage battery monitoring module 30, the direct current monitoring module 40, the alternating current monitoring module 50 and the charger group 20 are respectively detachably mounted on the cabinet 10. Tie switch 70 is used to connect first dc bus 210 and second dc bus 220. The dc monitoring module 40 is configured to be connected to the first dc bus 210. The charger group 20 is connected to the first dc bus 210 via the control switch 60. The ac monitoring module 50 is configured to be connected to the ac input device 300 and to be connected to the charger group 20 through a two-way auto-switching device. The battery monitoring module 30 is connected to the charger group 20 and the battery pack 400, respectively.

In the embodiment of the invention, on the basis of reserving the original screen cabinet, a plurality of chargers, a touch screen monitoring module, an alternating current and direct current monitoring module and other accessories are integrated to design the charging cabinet, and each part can be adjusted in position in the cabinet according to actual needs, so that the flexibility is good. And the whole size of the charging cabinet is matched with the original screen cabinet to realize the core change of the charging screen cabinet of the direct current system, the original screen cabinet, the direct current charging bus and the like do not need to be changed, old components are directly drawn out one by one, and a secondary control loop only needs to adjust wiring. During the whole installation and debugging period of the charging cabinet, the direct current power supply system 1000 does not need to quit operation, and all loads can be ensured to normally operate.

Specifically, the dc bus includes a first dc bus 210 and a second dc bus 220, both of which can be used for dc power distribution. The first dc bus 210 is connected to the second dc bus 220 through the tie switch 70.

The dc monitoring module 40 is connected to the first section of the dc bus 210, and is configured to monitor the first section of the dc bus 210, including monitoring parameters such as current and voltage of the first section of the dc bus 210, so as to determine whether the current power circuit is operating normally. In other embodiments, the second dc bus 220 may also be configured with the dc monitoring module 40 for monitoring whether the second dc bus 220 operates normally.

The ac monitoring module 50 is connected to the ac input device 300 and is used for monitoring and automatic switching control of three-phase ac input in the ac input device 300.

The battery monitoring module 30 is connected to the battery pack 400 and is configured to monitor the battery pack 400, including monitoring parameters such as current and voltage of the battery pack 400, so as to determine whether the battery pack 400 is normally powered. In the present embodiment, the mechanical and electrical connection relationship between the charger and the battery is maintained.

In addition, the charger group 20 is connected to the ac monitoring module 50 and the battery monitoring module 30 through a two-way auto-switching device, and then connected to the first dc bus 210 connected to the dc monitoring module 40 and the battery pack 400 through the control switch 60.

In the cabinet 100 that charges, the position of each part of rational distribution, and can carry out nimble adjustment according to on-the-spot actual demand, connect internal wiring in advance for the cabinet 100 that charges is whole compact pleasing to the eye and realize that the function is complete.

In the process of replacing the charger, when the charging cabinet 100 is disconnected from the first section of the dc bus 210, the charger group 20 and the battery pack 400 are disconnected from the first section of the dc bus 210, and the second section of the dc bus 220 is a standby power supply circuit, so that the original first section of the dc bus 210 and important loads carried by the first section of the dc bus 210 are not powered off. Therefore, the first-stage direct-current system does not need to be powered off, the load is transferred to the second-stage direct-current system for power supply through the direct-current interconnection switch 70, and the old chargers and other parts of the first-stage direct-current system can quit operation and be detached one by one. When the charging cabinet 100 is installed, primary and secondary electric wiring with the original screen cabinet is connected, and the debugging function is normal.

Compared with the prior art, the charging cabinet 100 in the embodiment of the invention has the following advantages:

Referring to fig. 1, in one embodiment, the control switch 60 includes a first switch 61, a second switch 62, and a third switch 63. The charger group 20 is connected to the first dc bus 210 via the first switch 61. The battery pack 400 is connected to the first dc bus 210 via the second switch 62 and to the charger group 20 via the third switch 63.

In the embodiment of the present invention, the first switch 61 is a charger output switch, the second switch 62 is a battery output switch, and the third switch 63 is a charger output to battery switch.

In the conventional entire screen replacing process, the first dc bus 210 needs to be mechanically cut, and then the first dc bus 210 and the load carried by the first dc bus must be completely powered off.

In the embodiment of the present invention, during the process of replacing the charger, the first switch 61, the second switch 62, and the third switch 63 are respectively disconnected, so as to disconnect the charger group 20 from the first section of the dc bus 210, the battery pack 400 from the first section of the dc bus 210, and the charger group 20 from the battery pack 400, so that the charger group 20 and the battery pack 400 are respectively disconnected from the first section of the dc bus 210. Meanwhile, the first section of dc bus 210 is connected to the second section of dc bus 220, so that the second section of dc bus 220 supplies power, the first section of dc bus 210 maintains operation, and all loads can operate normally.

Referring to fig. 2, in an embodiment, the charging cabinet 100 further includes a touch screen 80 and a touch screen monitoring module (not shown), wherein the touch screen 80 is connected to the touch screen monitoring module, and the touch screen monitoring module is in communication connection with the battery monitoring module 30, the dc monitoring module 40, and the ac monitoring module 50, respectively.

In the embodiment of the present invention, the touch screen 80 is configured to display the working parameters of the charging cabinet 100, and the touch screen monitoring module is configured to receive the monitoring parameters sent by the battery monitoring module 30, the dc monitoring module 40, and the ac monitoring module 50, so as to control the touch screen 80 to display the main control parameters.

Referring to fig. 2, in one embodiment, the cabinet 10 is formed with a plurality of cabinets 11, the cabinets 11 are arranged in rows, the charger group 20 includes a plurality of chargers, and the plurality of chargers are arranged in parallel in at least one row of cabinets 11.

In the embodiment of the invention, the size of the charging cabinet 100 is adapted to the original screen cabinet by designing the layout space, and the plurality of chargers, the 1 touch screen monitoring module, the 1 alternating current monitoring module 50, the 1 direct current monitoring module 40, the plurality of control switches 60, the wiring terminals and other accessories are all integrated in the charging cabinet 100, so that the positions of all components are reasonably distributed, flexible adjustment can be performed according to actual requirements on site, internal wiring is connected in advance, the whole is compact and attractive, and the function is complete.

Taking the 12 chargers shown in fig. 2 as an example, the 12 chargers may be divided into multiple groups, the chargers in each group are arranged in a row of cabinet lattices 11 side by side, and the multiple groups of chargers are respectively arranged on the multiple rows of cabinet lattices 11.

Referring to fig. 2 and 3, in one embodiment, the sizes of the plurality of chargers in each row of cells 11 are adapted to the sizes of the single row of cells 11.

In order to improve the space utilization rate of the cabinet body 10 and improve the aesthetic property of the whole charging cabinet 100, the sizes of the plurality of chargers in each row of cabinet lattices 11 are designed to be matched with the sizes of the single row of cabinet lattices 11, so that the whole charging cabinet is compact and beautiful, and the complete function is realized.

In one embodiment, the battery monitoring module 30, the dc monitoring module 40, and the ac monitoring module 50 are disposed in at least one row of the cabinet 11.

In the embodiment of the present invention, the space of the cabinet 10 is flexibly arranged, and the battery monitoring module 30, the dc monitoring module 40, and the ac monitoring module 50 are disposed in at least one row of the cabinet cells 11. The battery monitoring module 30 may be disposed on a cabinet 11 that is conveniently connected to the charger group 20.

Referring to fig. 2 and 3, in one embodiment, the ac monitoring module 50 and the dc monitoring module 40 are disposed side by side in the same row of the cabinet 11 and above the charger group 20.

In the embodiment of the present invention, the ac monitoring module 50 and the dc monitoring module 40 are designed to be located above the charger group 20 for convenient wiring.

Referring to fig. 2 and 3, in one embodiment, the cabinet 10 further includes a front panel 12 and a back panel 13, the front panel 12 is disposed on the front side of the cabinet 10, the back panel 13 is disposed on the back side of the cabinet 10, and the back panel 13 is provided with a plurality of heat dissipation holes.

In the embodiment of the present invention, the front panel 12 and the back panel 13 are used to protect the electrical devices inside the cabinet 10 from water, dust, etc.

Wherein, a plurality of louvres have still been seted up on back panel 13 to cabinet 100 that charges is in the operation process, and the safety in utilization of cabinet 100 that charges is improved to the heat extraction fast.

The embodiment of the present invention further provides a method for replacing the charging cabinet 100, which is applied to the charging cabinet 100 in any one of the above embodiments, and the method includes the following steps:

s10, respectively controlling to disconnect the connection between the dc monitoring module 40 and the first dc bus 210, the connection between the charger group 20 and the first dc bus 210, and the connection between the battery pack 400 and the first dc bus 210;

and S20, controlling the first section of direct current bus 210 to be connected to the second section of direct current bus 220, and controlling the second section of direct current bus 220 to supply power.

In the embodiment of the present invention, the first switch 61, the second switch 62, and the third switch 63 are respectively opened, so that the connection between the charger group 20 and the first-stage dc bus 210, the connection between the battery pack 400 and the first-stage dc bus 210, and the connection between the charger group 20 and the battery pack 400 are opened, so that the connection between the charger group 20 and the battery pack 400 and the connection between the first-stage dc bus 210 are respectively opened. Meanwhile, the first section of dc bus 210 is connected to the second section of dc bus 220, so that the second section of dc bus 220 supplies power, the first section of dc bus 210 keeps running, and the original first section of dc bus 210 and the important loads carried by the first section of dc bus 210 are not powered off. Therefore, the first-stage direct-current system does not need to be powered off, the load is transferred to the second-stage direct-current system for power supply through the direct-current interconnection switch 70, and the old chargers and other parts of the first-stage direct-current system can quit operation and be detached one by one. When the charging cabinet 100 is installed, primary and secondary electric wiring with the original screen cabinet is connected, and the debugging function is normal.

According to the method for replacing the charging cabinet 100, on the basis of keeping the original cabinet, a plurality of components such as a charger and a monitoring module of a direct current system are integrated, the charging cabinet 100 is designed in a modularized mode, core changing of the charging cabinet of the direct current system is achieved under the condition that power failure does not need to occur to the load of the direct current system, debugging is normal, and operation is stable. Therefore, the project construction period is not influenced by the operation of field equipment, and the replacement work can be carried out at any time.

Referring to fig. 1, an embodiment of the invention further provides a dc power supply system 1000, including: first section direct current bus 210, second section direct current bus 220, ac input device 300, storage battery group 400 and charging cabinet 100 of any one of the above embodiments, charging cabinet 100 is connected with first section direct current bus 210, second section direct current bus 220, ac input device 300 and storage battery group 400 respectively.

In the dc power supply system 1000 in the embodiment of the present invention, on the basis of maintaining the original cabinet, a plurality of components such as a charger and a monitoring module of a dc system are integrated, and the dc power supply system is designed into a charging cabinet 100 in a modular manner, so that a "core change" of the charging cabinet of the dc system is realized without power failure of a load of the dc system, and the dc power supply system is debugged normally and operates stably. Therefore, the project construction period is not influenced by the operation of field equipment, and the replacement work can be carried out at any time.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A charging cabinet, comprising: the intelligent charging system comprises a cabinet body, a charger group, a storage battery monitoring module, a direct current monitoring module, an alternating current monitoring module, a control switch and a communication switch;

2. The charging cabinet of claim 1, wherein the control switch comprises a first switch, a second switch, and a third switch;

3. The charging cabinet according to claim 2, further comprising a touch screen and a touch screen monitoring module, wherein the touch screen is connected to the touch screen monitoring module, and the touch screen monitoring module is in communication connection with the storage battery monitoring module, the direct current monitoring module and the alternating current monitoring module, respectively.

4. The charging cabinet according to any one of claims 1 to 3, wherein the cabinet body is formed with a plurality of cabinet compartments arranged in rows, the charger group comprises a plurality of chargers, and the plurality of chargers are arranged side by side in at least one row of the cabinet compartments.

5. A charging cabinet according to claim 4, wherein the plurality of chargers in each row of the cabinet are sized to fit the size of a single row of the cabinet.

6. A charging cabinet according to claim 4, wherein the battery monitoring modules, the DC monitoring modules and the AC monitoring modules are arranged in at least one row of the cabinet compartments.

7. A charging cabinet according to claim 6, wherein the AC monitoring module and the DC monitoring module are arranged side by side in the same row of the cabinet compartment above the charger group.

8. The charging cabinet according to claim 7, wherein the cabinet body further comprises a front panel and a back panel, the front panel is disposed on the front surface of the cabinet body, the back panel is disposed on the back surface of the cabinet body, and the back panel is provided with a plurality of heat dissipation holes.

9. A method for replacing a charging cabinet, which is applied to the charging cabinet according to any one of claims 1 to 8, the method comprising:

10. A dc power supply system, comprising: the charging cabinet of any one of claims 1-8, wherein the charging cabinet is connected to the first section of direct current bus, the second section of direct current bus, the alternating current input device, the storage battery pack, and the first section of direct current bus, the second section of direct current bus, the alternating current input device, and the storage battery pack.