Back-to-back switch parallel layout structure
Through the back-to-back parallel switch layout structure, the problem of insufficient current level of the single-unit switching device in the design of high-power wind energy converter is solved, and compact and efficient current transmission and strong versatility are achieved, adapting to the needs of different power levels.
Patent Information
- Application Number
- CN202420750175.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The current level of existing single-body switching devices cannot meet the design requirements of high-power wind energy converters, resulting in large size, high price and poor purchasingability.
The parallel layout structure of back-to-back switches is adopted, including two back-to-back circuit breaker components and contactor components, which are connected to the circuit breaker and the lower wiring line of the cabinet, the lower parallel connecting line of the contactor and the upper parallel connecting line of the contactor, to achieve compactness, Efficient current transmission.
It realizes a compact layout design, improves power density and part multiplexing, has strong versatility and uniform three-phase contact fluidity, and adapts to loop needs of different power levels.
Smart Images
Figure CN222126319U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wind energy generation, in particular to the technical field of a back-to-back switch parallel layout structure. Background Art
[0002] With the continuous development of wind power generation, the single capacity of wind power converters is increasing, and the current level of the original single switch device can no longer meet the design requirements. As the power density of the converter increases, the layout of the converter becomes very compact. The large current level switch has the characteristics of large size, high price, poor procurement, etc., which can no longer meet the design requirements of high-power converters. Therefore, the only way to meet it is to use the existing mature switch device parallel connection method. Utility Model Content
[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a back-to-back switch parallel layout structure, which can solve the above problems.
[0004] To achieve the above-mentioned purpose, the utility model proposes a back-to-back switch parallel layout structure, including a circuit breaker assembly, a contactor, a cabinet lower wiring row, a contactor lower parallel row, a contactor upper parallel row, a cabinet upper wiring row, a circuit breaker fixing plate and a contactor fixing plate assembly, wherein two circuit breaker assemblies are placed back to back and are respectively installed on two circuit breaker fixing plates; two contactors are placed back to back and are respectively fixed on a contactor fixing plate assembly; the lower end of the circuit breaker assembly is connected to the cabinet lower wiring row; the upper end of the circuit breaker assembly is connected to the middle of the contactor lower parallel row; the upper and lower contacts of the two back-to-back contactors are respectively connected to the contactor lower parallel row and the contactor upper parallel row; the middle of the upper end of the contactor upper parallel row is connected to the cabinet upper wiring row.
[0005] Preferably, the contactor fixing plate assembly is composed of a fixing sheet metal and a bottom limiting support plate, which can facilitate the installation and maintenance of the contactor and prevent the device from falling suddenly when being removed.
[0006] Preferably, the circuit breaker assembly is arranged back to back in a front-to-back manner, and the circuit breaker assembly consists of a circuit breaker and a plurality of aluminum bars.
[0007] Preferably, the lower contact of the circuit breaker is connected to the lower connecting row of the circuit breaker, and the upper contacts of the circuit breaker are respectively connected to the upper connecting row a of the circuit breaker, the upper connecting row b of the circuit breaker, the upper connecting row c of the circuit breaker and the upper connecting row d of the circuit breaker.
[0008] Preferably, the cabinet lower wiring bar consists of a lower transfer bar a, a lower transfer bar b, a lower transfer bar c and a cabinet lower incoming line bar, and the upper ends of the cabinet lower wiring bars are respectively connected to the lower aluminum bars of the circuit breaker assembly.
[0009] Preferably, the upper parallel row of contactors is composed of the upper parallel row of contactors a and the upper parallel row of contactors b stacked together; the lower parallel row of contactors is composed of the lower parallel row of contactors a and the lower parallel row of contactors b stacked together.
[0010] Preferably, the cabinet upper wiring row is composed of upper transfer row a, upper transfer row b, upper transfer row c, upper transfer row d and cabinet upper incoming line row, and the lower ends of the cabinet upper wiring rows are respectively connected to the upper part of the contactor in parallel.
[0011] Beneficial effects of the utility model: The utility model fully considers compactness and versatility, and the back-to-back switch layout structure of the utility model has the following advantages:
[0012] (1) Good compactness: the layout has high power density, small footprint, and high parts reuse rate;
[0013] (2) High versatility. By replacing switches of different power levels, circuits of different power levels can be realized.
[0014] (3) The switch contacts have good current distribution. The layout is symmetrical left and right, and front and back. The three-phase contacts of each switch have good current distribution and small current differences.
[0015] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a front axonometric view of a back-to-back switch parallel layout structure of the utility model;
[0017] Figure 2 This is a left view of a back-to-back switch parallel layout structure of the utility model;
[0018] Figure 3 This is an axonometric diagram of the contactor fixing assembly of the utility model;
[0019] Figure 4 This is a rear view of the circuit breaker assembly of the utility model;
[0020] Figure 5 This is a schematic diagram of the layout of the circuit breaker assembly and the connection row under the cabinet of the utility model;
[0021] Figure 6 It is a schematic diagram of the layout of the contactor connection row and the connection row on the cabinet of the utility model.
[0022] In the figure: 1, circuit breaker assembly; 2, contactor; 3, cabinet lower wiring row; 4, contactor lower parallel row; 5, contactor upper parallel row; 6, cabinet upper wiring row; 7, circuit breaker fixing plate; 8, contactor fixing plate assembly; 101, circuit breaker; 102, circuit breaker lower connection row; 103, circuit breaker upper connection row a; 104, circuit breaker upper connection row b; 105, circuit breaker upper connection row c; 106, circuit breaker upper connection row d; 301, lower transfer row a; 3 02, lower transfer row b; 303, lower transfer row c; 304, lower incoming line row of cabinet; 401, lower parallel row a of contactor; 402, lower parallel row b of contactor; 501, lower parallel row a of contactor; 502, lower parallel row b of contactor; 601, upper transfer row a; 602, upper transfer row b; 603, upper transfer row c; 604, upper transfer row d; 605, upper incoming line row of cabinet; 801, fixed sheet metal; 802, bottom limit support plate. DETAILED DESCRIPTION
[0023] See also Figure 1-Figure 6A back-to-back switch layout structure includes a circuit breaker assembly 1, a contactor 2, a cabinet lower wiring row 3, a contactor lower parallel row 4, a contactor upper parallel row 5, a cabinet upper wiring row 6, a circuit breaker fixing plate 7 and a contactor fixing plate assembly 8, wherein two circuit breaker assemblies 1 are placed back to back and are respectively installed on two circuit breaker fixing plates 7; two contactors 2 are placed back to back and are respectively fixed on one contactor fixing plate assembly 8; the lower end of the circuit breaker assembly 1 is connected to the cabinet lower wiring row 3; the upper end of the circuit breaker assembly 1 is connected to the middle of the contactor lower parallel row 4; the upper and lower contacts of the two back-to-back contactors 2 are respectively connected to the contactor lower parallel row 4 and the contactor upper parallel row 5; the upper middle of the contactor upper parallel row 5 is connected to the cabinet upper wiring row 6, and the contactor fixing plate assembly 8 is composed of a fixed sheet metal 801 and a bottom limit support plate 802. The contactor fixing plate assembly 8 is composed of a fixing sheet metal 801 and a bottom limit support plate 802. The circuit breaker assembly 1 is arranged in a back-to-back arrangement, and the circuit breaker assembly 1 is composed of a circuit breaker 101 and a plurality of aluminum bars. The lower contact of the circuit breaker 101 is connected to the lower connecting row 102 of the circuit breaker, and the upper contact of the circuit breaker 101 is respectively connected to the upper connecting row a103 of the circuit breaker, the upper connecting row b104 of the circuit breaker, the upper connecting row c105 of the circuit breaker and the upper connecting row d106 of the circuit breaker. The lower wiring row 3 of the cabinet is composed of a lower transfer row a301, a lower transfer row b302, a lower transfer row c303 and a lower incoming line row 304 of the cabinet, and the upper ends of the lower wiring row 3 of the cabinet are respectively connected to the lower connecting row 102 of the circuit breaker. The contactor upper parallel row 4 is composed of the contactor upper parallel row a401 and the contactor upper parallel row b402 superimposed; the contactor lower parallel row 5 is composed of the contactor lower parallel row a501 and the contactor lower parallel row b502 superimposed. The cabinet upper wiring row 6 is composed of the upper transfer row a601, the upper transfer row b602, the upper transfer row c603, the upper transfer row d604 and the cabinet upper incoming line row 605, and the lower end of the cabinet upper wiring row 6 is respectively connected to the contactor upper parallel row 5.
[0024] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.
Claims
1. A back-to-back switch parallel layout structure, characterized in that: The invention comprises a circuit breaker assembly (1), a contactor (2), a cabinet lower wiring row (3), a contactor lower parallel row (4), a contactor upper parallel row (5), a cabinet upper wiring row (6), a circuit breaker fixing plate (7) and a contactor fixing plate assembly (8); two circuit breaker assemblies (1) are placed back to back and are respectively mounted on two circuit breaker fixing plates (7); two contactors (2) are placed back to back and are respectively fixed on one contactor fixing plate assembly (8); the lower end of the circuit breaker assembly (1) is connected to the cabinet lower wiring row (3); the upper end of the circuit breaker assembly (1) is connected to the middle of the contactor lower parallel row (4); the upper and lower contacts of the two back-to-back contactors (2) are respectively connected to the contactor lower parallel row (4) and the contactor upper parallel row (5); the upper middle of the contactor upper parallel row (5) is connected to the cabinet upper wiring row (6).
2. The back-to-back switch parallel layout structure according to claim 1, characterized in that: The contactor fixing plate assembly (8) is composed of a fixing sheet metal (801) and a bottom limiting support plate (802).
3. The back-to-back switch parallel layout structure according to claim 1, characterized in that: The circuit breaker assembly (1) is arranged in a front-to-back manner and back-to-back, and the circuit breaker assembly (1) is composed of a circuit breaker (101) and a plurality of aluminum bars.
4. The back-to-back switch parallel layout structure as claimed in claim 3, characterized in that: The lower contact of the circuit breaker (101) is connected to the lower connection row (102) of the circuit breaker, and the upper contact of the circuit breaker (101) is respectively connected to the upper connection row a (103) of the circuit breaker, the upper connection row b (104) of the circuit breaker, the upper connection row c (105) of the circuit breaker, and the upper connection row d (106) of the circuit breaker.
5. The back-to-back switch parallel layout structure according to claim 1, characterized in that: The cabinet lower wiring row (3) is composed of a lower transfer row a (301), a lower transfer row b (302), a lower transfer row c (303) and a cabinet lower incoming line row (304), and the upper ends of the cabinet lower wiring rows (3) are respectively connected to the circuit breaker lower connection rows (102).
6. The back-to-back switch parallel layout structure according to claim 1, characterized in that: The contactor upper parallel row (4) is composed of a contactor upper parallel row a (401) and a contactor upper parallel row b (402) stacked together; the contactor lower parallel row (5) is composed of a contactor lower parallel row a (501) and a contactor lower parallel row b (502) stacked together.
7. The back-to-back switch parallel layout structure according to claim 1, characterized in that: The cabinet upper wiring row (6) is composed of an upper transfer row a (601), an upper transfer row b (602), an upper transfer row c (603), an upper transfer row d (604) and a cabinet upper incoming line row (605), and the lower ends of the cabinet upper wiring row (6) are respectively connected to the contactor upper parallel row (5).