Multi-module PCS alternating current and direct current dual-conversion device in cabinet
By setting up a grid circuit breaker, module PCS, current transformer and battery circuit breaker in the cabinet, flexible power supply of multi-module PCS AC and DC dual conversion devices is achieved, solving the problem that existing devices cannot adjust load power, reducing connection costs and improving safety.
Patent Information
- Application Number
- CN202422200302.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing multi-module PCS AC/DC dual conversion device can only adjust the load power by controlling the current size and cannot meet different power requirements.
Design a multi-module PCS AC and DC power dual conversion device in the cabinet. Through the reasonable layout of the power grid circuit breaker, module PCS, current transformer and battery circuit breaker, multiple module PCS are used to realize the conversion and merge of AC and DC power, ensuring that the load can be powered normally under different circumstances.
It realizes stable power supply of loads under different power requirements, reduces the cost of copper flask connection, and improves the safety and flexibility of the device.
Smart Images
Figure CN223079771U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of energy storage, in particular to a multi-module PCS AC-DC dual conversion device in a cabinet. Background Technique
[0002] The multi-module PCS AC-DC dual conversion device combines the currents of multiple groups of PCS by connecting them. When alternating current is input from the external power grid to multiple groups of PCS, each group of PCS will convert the obtained alternating current into direct current (realized by the AC / DC bidirectional converter inside the PCS), and then the direct currents of multiple groups of PCS are combined and stored in an external battery pack to store it as energy storage electric energy; when direct current is input from the external battery pack to multiple groups of PCS, each group of PCS will convert the obtained direct current into alternating current (realized by the DC / AC bidirectional converter inside the PCS), and then the alternating currents of multiple groups of PCS are combined into a large current for the external load to use.
[0003] The size of the existing load power depends on the magnitude of the current (generally the voltage is stable), and the magnitude of the current is controlled by the number of module PCS; currently, such devices only connect one group of PCS, and when different powers are required for the load, it cannot be satisfied. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a multi-module PCS AC-DC dual conversion device in a cabinet to solve the problem that the size of the existing load power depends on the magnitude of the current (generally the voltage is stable), and the magnitude of the current is controlled by the number of module PCS; currently, such devices only connect one group of PCS, and when different powers are required for the load, it cannot be satisfied as mentioned in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A multi-module PCS AC-DC dual conversion device in a cabinet, including a mounting plate, a grid circuit breaker, module PCS, a current transformer, and a battery circuit breaker. On one side of the surface of the mounting plate, a grid circuit breaker is fixedly installed. The output end of the grid circuit breaker is connected to a first copper bar. One end of the first copper bar is connected to module PCS. An installation frame is fixedly connected to the outside of the module PCS. A first fixing frame is fixedly installed on the outside of the installation frame. One side of the first fixing frame is threadedly connected to a first insulating column. On one side of the surface of the mounting plate, a second fixing frame is fixedly installed. One end surface of the second fixing frame is threadedly connected to a second insulating column. One end of the second insulating column is fixedly connected to a second copper bar. A current transformer is sleeved and fixed on the outer ring of the first copper bar. A battery circuit breaker is fixedly installed on one side of the surface of the mounting plate.
[0006] Preferably, multiple sets of the module PCSs are provided, and the first copper bar is connected to the internal AC terminal of the module PCS.
[0007] Preferably, one end of the first insulating column is provided with a threaded hole, the first insulating column is threadedly connected to the first copper bar, and the first insulating column, the second insulating column and the third insulating column have matching structures.
[0008] Preferably, the current transformer is fixed on the first copper bar where the grid circuit breaker is merged with the internal AC terminal of the module PCS.
[0009] Preferably, the output end of the battery circuit breaker is connected to a third copper bar, the other end of the second fixing bracket is threadedly connected to a third insulating column, and one end of the third insulating column is fixedly installed with a fourth copper bar.
[0010] Preferably, the third copper bar is respectively connected to the positive and negative poles of the internal DC terminal of the module PCS.
[0011] Preferably, one end of the fourth copper bar is connected to the input end of the battery circuit breaker.
[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The multi-module PCS AC / DC dual-conversion device in this cabinet, through the settings of the grid circuit breaker, module PCS, current transformer and battery circuit breaker, first makes a reasonable layout of the battery circuit breaker, grid circuit breaker and module PCS; this reduces the cost of the mutually connected copper bars. Secondly, multiple module PCSs are provided, which can meet the use of different power loads. This multi-module PCS AC / DC dual-conversion device connects the load externally. When the grid is normal and the load is in use, the external grid supplies power to the load; when the load is not in use, the external grid converts the alternating current into direct current through the "multi-module PCS AC / DC dual-conversion device" and stores it in the battery pack. When the grid is disconnected, to ensure power supply to the load, the direct current stored in the battery pack is converted into alternating current through the "multi-module PCS AC / DC dual-conversion device" and used by the load. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic diagram of the overall external structure of the present utility model;
[0014] Figure 2 is a schematic diagram of the rear external structure of the present utility model;
[0015] Figure 3 is a schematic diagram of the front external structure of the present utility model;
[0016] Figure 4 is a schematic diagram of the side external structure of the present utility model.
[0017] In the figure: 1. mounting plate; 2. grid circuit breaker; 3. first copper busbar; 4. module PCS; 5. mounting frame; 6. first fixing frame; 7. first insulating column; 8. second fixing frame; 9. second insulating column; 10. second copper busbar; 11. current transformer; 12. battery circuit breaker; 13. third copper busbar; 14. third insulating column; 15. fourth copper busbar. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] See also Figures 1-4 The utility model provides a technical solution: a multi-module PCS AC / DC dual conversion device in a cabinet, comprising a mounting plate 1, a power grid circuit breaker 2, a module PCS4, a current transformer 11 and a battery circuit breaker 12, a power grid circuit breaker 2 is fixedly mounted on one side of the surface of the mounting plate 1, a first copper bar 3 is connected to the output end of the power grid circuit breaker 2, one end of the first copper bar 3 is connected to the module PCS4, a mounting frame 5 is fixedly connected to the outer side of the module PCS4, a first fixing frame 6 is fixedly mounted on the outer side of the mounting frame 5, a first insulating column 7 is threadedly connected to one side of the first fixing frame 6, a second fixing frame 8 is fixedly mounted on one side of the surface of the mounting plate 1, a second insulating column 9 is threadedly connected to the surface of one end of the second fixing frame 8, a second copper bar 10 is fixedly connected to one end of the second insulating column 9, a current transformer 11 is fixedly mounted on the outer ring of the first copper bar 3, and a battery circuit breaker 12 is fixedly mounted on one side of the surface of the mounting plate 1.
[0020] Furthermore, the module PCS4 is provided with multiple groups, and the first copper busbar 3 is connected to the AC end inside the module PCS4. Through the setting of the module PCS4 and the first copper busbar 3, the output end of the grid circuit breaker 2 is respectively connected to the AC ends of multiple modules PCS4 through the first copper busbar 3, and the combined AC power is converted into DC power through the AC / DC bidirectional converter inside the module PCS4.
[0021] Further, one end of the first insulating post 7 is provided with a threaded hole, and the first insulating post 7 is threadedly connected to the first copper busbar 3. The first insulating post 7, the second insulating post 9, and the third insulating post 14 have matching structures. Through the arrangement of the first insulating post 7, the second insulating post 9, and the third insulating post 14, one ends of the first insulating post 7, the second insulating post 9, and the third insulating post 14 are respectively fixed on the first fixing frame 6 and the second fixing frame 8, and the other ends fix the first copper busbar 3, the second copper busbar 10, the third copper busbar 13, and the fourth copper busbar 15 with screws; thus maintaining a certain distance from the inner wall of the cabinet to increase safety.
[0022] Further, the current transformer 11 is fixed on the first copper busbar 3 that combines the internal AC alternating current end of the grid circuit breaker 2 to the module PCS4. Through the arrangement of the current transformer 11, it can be used to detect the magnitude of the current when power is input.
[0023] Further, the output end of the battery circuit breaker 12 is connected to the third copper busbar 13. The other end of the second fixing frame 8 is threadedly connected to the third insulating post 14. One end of the third insulating post 14 is fixedly installed with the fourth copper busbar 15. Through the arrangement of the battery circuit breaker 12, the output end of the battery circuit breaker 12 is connected to the cable of the external battery pack through the fourth copper busbar 15, and the combined direct current can be stored in the external battery pack.
[0024] Further, the third copper busbar 13 is respectively connected to the positive and negative poles of the internal DC direct current of the module PCS4. Through the arrangement of the third copper busbar 13, the direct current converted by the module PCS4 can be transmitted to the battery circuit breaker 12 through the third copper busbar 13.
[0025] Further, one end of the fourth copper busbar 15 is connected to the input end of the battery circuit breaker 12. Through the arrangement of the fourth copper busbar 15, the fourth copper busbar 15 can be connected to an external battery pack for current transmission.
[0026] Working principle: First, one end of the external grid cable is fixedly connected to the second copper busbar 10 at the input end of the grid circuit breaker 2. Then the current passes through the grid circuit breaker 2 and is transmitted to the module PCS4 through the first copper busbar 3. Through the AC / DC bidirectional converter inside the module PCS4, the combined alternating current is converted into direct current. Subsequently, the direct current combined by multiple module PCS4s is transmitted to the battery circuit breaker 12 through the third copper busbar 13, and then transmitted to the external battery pack through the fourth copper busbar 15 at the output end of the battery circuit breaker 12. When the external grid is disconnected, the direct current of the external battery pack passes through the battery circuit breaker 12 to the DC end of the multi-module PCS4. Subsequently, through the DC / AC bidirectional converter inside the module PCS4, the direct current is converted into alternating current, and then connected to the grid circuit breaker 2. The combined alternating current comes out from the grid circuit breaker 2 (one end of the external grid cable is connected to the second copper busbar 10 of the grid circuit breaker 2, and the other end is connected to the load through an opening at the bottom of the cabinet) to supply power to the load.
[0027] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. A multi-module PCS AC / DC dual-conversion device inside a cabinet, comprising a mounting plate (1), a grid circuit breaker (2), a module PCS (4), a current transformer (11), and a battery circuit breaker (12), characterized in that: On one side of the surface of the mounting plate (1), a grid circuit breaker (2) is fixedly installed. The output end of the grid circuit breaker (2) is connected to a first copper bar (3). One end of the first copper bar (3) is connected to a module PCS (4). The outer side of the module PCS (4) is fixedly connected to a mounting frame (5). The outer side of the mounting frame (5) is fixedly installed with a first fixing frame (6). One side of the first fixing frame (6) is threadedly connected to a first insulating column (7). On one side of the surface of the mounting plate (1), a second fixing frame (8) is fixedly installed. One end surface of the second fixing frame (8) is threadedly connected to a second insulating column (9). One end of the second insulating column (9) is fixedly connected to a second copper bar (10). An outer ring of the first copper bar (3) is sleeved and fixed with a current transformer (11). On one side of the surface of the mounting plate (1), a battery circuit breaker (12) is fixedly installed.
2. The multi-module PCS AC-DC dual conversion device in the cabinet according to claim 1, characterized in that: A plurality of groups of the module PCS (4) are provided, and the first copper bar (3) is connected to the internal AC alternating current end of the module PCS (4).
3. The multi-module PCS AC / DC dual-conversion device in the cabinet according to claim 1, wherein: One end of the first insulating column (7) is provided with a threaded hole. The first insulating column (7) is threadedly connected to the first copper bar (3). The first insulating column (7), the second insulating column (9) and the third insulating column (14) have matching structures.
4. A multi-module PCS AC-DC dual conversion device in a cabinet according to claim 1, characterized in that: The current transformer (11) is fixed on the first copper bar (3) where the grid circuit breaker (2) is merged into the internal AC alternating current end of the module PCS (4).
5. A multi-module PCS AC-DC dual conversion device in a cabinet according to claim 1, characterized in that: The output end of the battery circuit breaker (12) is connected to a third copper bar (13). The other end of the second fixing frame (8) is threadedly connected to a third insulating column (14). One end of the third insulating column (14) is fixedly installed with a fourth copper bar (15).
6. The multi-module PCS AC / DC dual conversion device in the cabinet according to claim 5, wherein: The third copper bar (13) is respectively connected to the positive and negative poles of the internal DC direct current end of the module PCS (4).
7. A multi-module PCS AC / DC dual-conversion device in a cabinet according to claim 5, characterized in that: One end of the fourth copper bar (15) is connected to the input end of the battery circuit breaker (12).