Power supply device of DC distribution board
The DC distribution board power supply device addresses unreliable power supply issues by separating dual power supplies into different sections and using a mechanical interlock to prevent simultaneous activation, improving reliability and reducing failure recovery time.
Patent Information
- Application Number
- JP2025001748U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Priority Date
- 2024-07-22
- Filing Date
- 2025-05-30
- Publication Date
- 2025-07-28
- Estimated Expiration
- 2035-05-30
AI Technical Summary
The existing DC distribution boards suffer from unreliable power supply and prolonged recovery times due to dual power supplies being connected to the same section of the upper busbar, leading to potential equipment damage and safety hazards during power failures.
A power supply device for a DC distribution board with separate first and second power input branch circuits connected to normal and backup power supplies, respectively, and a mechanical interlock device to prevent simultaneous activation, ensuring the power supplies are located in different sections of the upper busbar.
Enhances power supply reliability, reduces recovery time from failures, and ensures normal equipment operation by preventing simultaneous activation of dual power supplies, providing a safer and more reliable power system.
Smart Images
Figure 0003252183000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of circuit structures of DC systems, and particularly to a power supply device for a DC distribution board.
Background Art
[0002] A DC system is a power supply device that supplies DC power to signal devices, protection devices, automatic devices, emergency lighting, emergency power sources, and opening and closing operations of circuit breakers. The DC system is an independent power source that is not affected by generators, factory power, and system operation modes. It is an important device that ensures continuous supply of DC power by a backup power source - battery even when the external AC power supply fails. The reliability and safety of the DC panel directly affect the reliability and safety of power supply in the power system.
[0003] In a certain DC system, a DC charging device, a distribution board, and a battery of the "Torch" brand manufactured by Xu Jidianqi Co., Ltd. are adopted. The charging module adopts an imported high-frequency IGBT switching device and an imported fast-recovery rectifier diode. Even if any charging module fails, it does not affect the operation of the system, and a live-line pluggable operation is realized. Each rectifier module has an autonomous current sharing function.
[0004] However, the dual power supply of the DC distribution board is supplied from the same section of the upper busbar. Taking the dust removal 5A section as an example, the wiring of the 110V DC distribution board of the original 400V dust removal 5A section is shown in Figure 1. Both sets of input lines are connected to the 110V DC section 1 of unit 5, that is, the same power source.
[0005] This connection method has a risk that if the 110V DC section 1 of the upper power supply unit 5 of the 110V DC distribution board in the 400V dust removal 5A section cannot supply power and cannot be restored, the distribution board cannot restore power supply in a short time, all loads in the distribution board cannot operate normally, and it will affect the safety and stability of the system.
[0006] Since the opening and closing operations and protection of the switch require a DC power supply, if the DC power supply is cut off, the device may not be able to start and stop normally. When the equipment fails, the protection function is lost, and the faulty equipment cannot be cut off, which may cause damage to the equipment or expand the scope of the failure, leading to more serious accidents.
Summary of the Invention
Problems to be Solved by the Invention
[0007] The object of the present invention is to provide a power supply device for a DC distribution board that improves the reliability of power supply, shortens the recovery time of a DC power supply failure, and ensures the normal operation of equipment in order to overcome the above-mentioned drawbacks of the prior art.
[0008] The object of the present invention can be achieved by the following technical solutions.
[0009] A power supply device for a DC distribution board, wherein the DC distribution board is provided with a first power input branch circuit and a second power input branch circuit, the power supply device includes a normal power supply, a backup power supply, and a mechanical interlock device, the first power input branch circuit is connected to the normal power supply, the second power input branch circuit is connected to the backup power supply, and the mechanical interlock device is connected to the first power input branch circuit and the second power input branch circuit respectively, and is used to prevent the first power input branch circuit and the second power input branch circuit from being closed simultaneously.
[0010] Furthermore, a first input switch is connected in series to the first power input branch circuit, a second input switch is connected in series to the second power input branch circuit, and the mechanical interlock device is connected to the first input switch and the second input switch respectively.
[0011] Furthermore, the DC distribution board is a 110V DC distribution board.
[0012] Furthermore, the normal power supply and the backup power supply are respectively located in different sections of the upper busbar dual power supply.
[0013] Furthermore, the normal power supply is the 110V DC section 1 of the upper busbar, and the backup power supply is the 110V DC section 2 of the upper busbar.
[0014] Compared with the prior art, the present invention has the following advantages.
[0015] (1) The present invention changes the distribution of the upper power supplies of the dual power supplies of the DC distribution board, changing from being powered by the dual power supplies in the same section of the original upper busbar to being powered by the dual power supplies in different sections of the upper busbar, thereby improving the reliability of power supply, shortening the recovery time of the DC power supply failure, and ensuring the normal operation of the equipment. (2) The present invention provides a mechanical interlock device for preventing the dual power supplies from being turned on simultaneously. That is, during normal operation, neither the power switch nor the input switch of the backup power supply is closed, preventing the lower busbar from being connected in parallel, forming a double insurance for the system and the lock device, and making it safer and more reliable.
Brief Description of the Drawings
[0016]
Figure 1
Figure 2
Description of the Reference Numerals
[0017] 1, First power input branch circuit; 2, Second power input branch circuit; 3, 110V DC section 1 of the upper busbar; 4, 110V DC section 2 of the upper busbar; 5, First input switch; 6, Second input switch; 7, Mechanical interlock device.
Embodiments for Carrying Out the Invention
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings may be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather to represent selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts are included within the protection scope of the present invention.
[0020] It should be noted that in the following figures, the same reference numerals and characters represent the same items. Once an item is defined in a figure, no further definition and explanation are required in subsequent figures.
[0021] In addition, in the description of the present invention, the directions and positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the directions and positional relationships shown in the drawings, or the directions and positional relationships in which the product of the present invention is usually placed when in use. This is only for the purpose of explaining the present invention and simplifying the explanation, and does not indicate or imply that the mentioned device or element must have a specific direction and must be constructed and operate in a specific direction. Therefore, this cannot be understood as a limitation of the present invention.
[0022] Note that the terms "first" and "second" are used only for convenience of explanation and should not be understood as indicating relative importance, implying relative importance, or implicitly indicating the amount of technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "a plurality" means two or more unless otherwise clearly limited.
[0023] Also, terms such as "horizontal" and "vertical" do not mean that the member needs to be completely horizontal or suspended, but rather that it may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, and it may be slightly inclined.
Embodiment
[0024] As shown in FIG. 2, this embodiment provides a power supply device for a DC distribution board, and the DC distribution board is provided with a first power input branch circuit 1 and a second power input branch circuit 2. The power supply device further includes a normal power supply, a backup power supply, and a mechanical interlock device 7. The first power input branch circuit 1 is connected to the normal power supply, the second power input branch circuit 2 is connected to the backup power supply, the mechanical interlock device 7 is connected to the first power input branch circuit 1 and the second power input branch circuit 2 respectively, and is used to prevent the first power input branch circuit 1 and the second power input branch circuit 2 from being closed simultaneously.
[0025] Furthermore, a first input switch 5 is connected in series to the first power input branch circuit 1, a second input switch 6 is connected in series to the second power input branch circuit 2, and the mechanical interlock device 7 is connected to the first input switch 5 and the second input switch 6 respectively.
[0026] The normal power supply and the backup power supply are respectively located in different sections of the upper busbar dual power supply.
[0027] In this embodiment, the DC distribution board is a 110V DC distribution board.
[0028] The normal power supply is the 110V DC section 1(3) of the upper busbar, and the backup power supply is the 110V DC section 2(4) of the upper busbar.
[0029] In this solution, the dual power supply of the DC distribution board is changed from the dual power supply of the same section of the original upper busbar to the dual power supply of different sections of the upper busbar. As shown in Figure 2, the input line 1 of the 110V DC distribution board of the 400V dust removal 5A section is obtained from the 110V DC section 1 of unit 5, and the input line 1 of the 110V DC distribution board of the 400V dust removal 5A section is obtained from the 110V DC section 2 of unit 5. When any power supply fails, after confirming that there is no fault in this section of the busbar, the backup power supply can supply power.
[0030] At the same time, a mechanical locking device is added to prevent the dual power supplies from being turned on simultaneously. During normal operation, neither the power switch nor the input switch of the backup power supply is closed, preventing the lower busbar from being connected in parallel and forming a double insurance for the system and the locking device.
[0031] The preferred embodiments of the present invention have been described in detail above. It should be understood by those skilled in the art that many modifications and changes can be made based on the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, inference, or limited experiments based on the concept of the present invention and based on the prior art should be within the protection scope defined by the claims.
Claims
1. A power supply device for a DC distribution board, wherein a first power input line branch circuit (1) and a second power input line branch circuit (2) are provided in the DC distribution board, the power supply device includes a normal power supply, an emergency power supply, and a mechanical interlock device (7), the first power input line branch circuit (1) is connected to the normal power supply, the second power input line branch circuit (2) is connected to the emergency power supply, the mechanical interlock device (7) is connected to the first power input line branch circuit (1) and the second power input line branch circuit (2) respectively, and is used to prevent the first power input line branch circuit (1) and the second power input line branch circuit (2) from being closed simultaneously.
2. A first input line switch (5) is connected in series to the first power input line branch circuit (1), a second input line switch (6) is connected in series to the second power input line branch circuit (2), and the mechanical interlock device (7) is connected to the first input line switch (5) and the second input line switch (6) respectively. The power supply device for a DC distribution board according to Claim 1.
3. The DC distribution board is a 110V DC distribution board. The power supply device for a DC distribution board according to Claim 1.
4. The normal power supply and the emergency power supply are respectively located in different sections of the dual power supply of the upper busbar. The power supply device for a DC distribution board according to Claim 1.
5. The normal power supply is the 110V DC section 1 (3) of the upper busbar, and the emergency power supply is the 110V DC section 2 (4) of the upper busbar. The power supply device for a DC distribution board according to Claim 4.