Power grid adaptability test equipment

Abstract

The utility model belongs to the technical field of test equipment, particularly relates to power grid adaptability test equipment, and aims to solve the problems that a circuit board in the conventional test equipment is inconvenient to install, is mostly installed through screws, and is low in disassembly and assembly efficiency, the following scheme is provided: the power grid adaptability test equipment comprises a test shell, and the circuit board is arranged in the test shell; a first switching circuit breaker, a second switching circuit breaker, a fourth switching circuit breaker, a fifth switching circuit breaker, a seventh switching circuit breaker, an eighth switching circuit breaker and a power grid disturbance analog converter are arranged on the circuit board, a displayer and an interface are arranged on the outer side of the testing shell, the circuit board is connected with the displayer and the interface, two supporting pieces are arranged in the testing shell, the circuit board is placed on the two supporting pieces, and a shell cover is movably installed on a top opening of the testing shell. According to the utility model, the structure is simple, the circuit board is conveniently and rapidly pressed and fixed while the shell cover is positioned, the fixation of the two rectangular strips can be released by pulling the two handle strips to be far away from each other, and rapid disassembly is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a power grid adaptability testing device. Background Art

[0002] With the vigorous development of wind power generation technology in my country in recent years, my country's offshore wind power has gradually shifted from coastal areas to mid-sea areas. The transmission distance has increased significantly, and the line loss has increased. In order to reduce transmission losses, the 66kV voltage level came into being, and the onshore distributed wind power also changed its grid connection point voltage level from 35kV to 10kV. The State Grid has put forward higher requirements for the grid adaptability of wind turbines. Models that cannot provide grid adaptability test capability certificates cannot be connected to the grid. Therefore, grid adaptability test equipment is produced. It is generally connected in series between the grid and the high-voltage side of the wind turbine step-up transformer to simulate disturbances to verify the grid adaptability of wind turbines. Most grid adaptability test equipment is 35kV and cannot be connected to systems with 66kV and 10kV voltage levels. For systems with 66kV and 10kV voltage levels, grid adaptability equipment must be designed separately to meet the test requirements. After searching, the patent with the publication (announcement) number: CN217484426U discloses a wind turbine grid adaptability test device compatible with multiple voltage levels, including the first, second, fourth, fifth, seventh and eighth switching circuit breakers, the first and second input transformers connected in series, the first and second output transformers connected in series, the grid disturbance simulation converter and the filter capacitor cabinet, the first switching circuit breaker and the second switching circuit breaker are connected to the grid, the first input transformer is connected to the first switching circuit breaker, the second switching circuit breaker is connected between the first input transformer and the second input transformer, the second input transformer is connected to the grid disturbance simulation converter through the seventh switching circuit breaker, the grid disturbance simulation converter is connected to the first output transformer through the eighth switching circuit breaker, and the filter capacitor cabinet is connected to the second output transformer through the fourth switching circuit breaker. A set of equipment can be used to realize the grid adaptability test of wind turbines incorporated with multiple voltage levels, and the first, second, fourth, fifth, seventh and eighth switching circuit breakers, the grid disturbance simulation converter, etc. are all arranged on the circuit board.

[0003] The circuit boards in the existing test equipment are inconvenient to install and are mostly installed by screws, which results in low assembly and disassembly efficiency. Summary of the invention

[0004] The utility model aims to solve the shortcomings of inconvenient installation of circuit boards in existing test equipment, which are mostly installed by screws and have low disassembly and assembly efficiency, and proposes a power grid adaptability test device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A power grid adaptability test device comprises a test shell, wherein a circuit board is arranged inside the test shell, and a first, second, fourth, fifth, seventh and eighth switching circuit breakers and a power grid disturbance simulation converter are arranged on the circuit board; a display and an interface are arranged outside the test shell, and the circuit board is connected with the display and the interface; two supporting members are arranged inside the test shell, and the circuit board is placed on the two supporting members; a shell cover is movably installed on the top of the test shell, and two pressure mechanisms are symmetrically arranged on the bottom of the shell cover, and extrusion structures are arranged on the two pressure mechanisms, and the two extrusion structures are adapted to the circuit board.

[0007] Preferably, the tops of the two support members are each provided with notches, and the circuit board is placed in the two notches; the two notches are used to support the circuit board.

[0008] Preferably, four positioning rods are fixedly installed on the top opening of the test shell, and four positioning slots are opened on the bottom of the shell cover, and the positioning rods are adapted to the positioning slots; the shell cover is connected to the four positioning slots through the four positioning rods, so that the shell cover can be positioned.

[0009] Preferably, the pressure mechanism includes two pressure rods, both of which are fixedly mounted on the bottom of the shell cover, the same rectangular bar is installed at the bottom of the two pressure rods, two groups of card slots are provided on the outside of the rectangular bar, two sliding holes are provided on both sides of the test shell, and handle bars are provided on both sides of the test shell, two card rods are fixedly mounted on the inner sides of the two handle bars, the inner ends of the card rods are inclined, and the card rods are adapted to the corresponding card slots; the card rods enter the card slots to fix the rectangular bar.

[0010] Preferably, an elastic groove is provided at the bottom of the clamping rod, an elastic block is fixedly installed on the inner wall of the bottom of the sliding hole, the elastic block is slidably connected to the inner wall of the corresponding elastic groove, and a spring is fixedly installed between the elastic block and the inner wall of the elastic groove; the spring provides elastic force to the clamping rod.

[0011] Preferably, the extrusion structure comprises a trapezoidal block, which is fixedly mounted on the bottom of the rectangular bar, the inner side of the trapezoidal block is arranged as an inclined surface, and a rubber pad is arranged on the inner side of the trapezoidal block.

[0012] Compared with the prior art, the advantages of the utility model are:

[0013] In this solution, the circuit board is placed in the two notches of the two supporting members, the shell cover is connected to the four positioning grooves through four positioning rods, the shell cover drives the two rectangular bars to move downward through the four pressure rods, and the rectangular bars drive the rubber pads to press and fix the circuit board through the trapezoidal blocks;

[0014] In this solution, the spring provides elastic force for the card rod. When the card rod enters the corresponding card slot, the rectangular strip can be locked and fixed, and then the shell cover is fixed. The two handle strips are pulled away from each other, and the handle strip drives the two card rods away from each other. When the card rod leaves the corresponding card slot, the fixation of the rectangular strip can be released.

[0015] The utility model has a simple structure and can quickly and conveniently press and fix the circuit board while positioning the shell cover. The fixation of the two rectangular bars can be released by pulling the two handle bars away from each other, so that quick disassembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the power grid adaptability test equipment proposed by the utility model;

[0017] Figure 2 The utility model proposed Figure 1 A schematic cross-sectional structure diagram of ;

[0018] Figure 3 This is a schematic diagram of the structure of part A of the power grid adaptability test equipment proposed by the utility model;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of two pressure rods and rectangular strips proposed by the utility model;

[0020] Figure 5 This is a schematic diagram of the three-dimensional structure of the support member proposed by the utility model.

[0021] In the figure: 1. test shell; 11. display; 12. interface; 13. circuit board; 14. support; 15. notch; 16. shell cover; 17. positioning rod; 18. positioning slot; 2. pressure mechanism; 21. pressure rod; 22. rectangular bar; 23. card slot; 24. sliding hole; 25. card rod; 26. elastic slot; 27. spring; 28. handle bar; 29. ​​elastic block; 3. trapezoidal block; 31. rubber pad. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-5The power grid adaptability test equipment comprises a test shell 1, a circuit board 13 is arranged inside the test shell 1, and the circuit board 13 is provided with a first, a second, a fourth, a fifth, a seventh and an eighth switching circuit breaker, and a power grid disturbance simulation converter, a display 11 and an interface 12 are arranged outside the test shell 1, and the circuit board 13 is connected with the display 11 and the interface 12, two support members 14 are arranged inside the test shell 1, and the circuit board 13 is placed on the two support members 14, a shell cover 16 is movably installed on the top of the test shell 1, and two pressure mechanisms 2 are symmetrically arranged on the bottom of the shell cover 16, and the two pressure mechanisms 2 are provided with extrusion structures, and the two extrusion structures are adapted to the circuit board 13.

[0024] In this embodiment, notches 15 are formed on the tops of the two support members 14 , and the circuit board 13 is placed in the two notches 15 ; the two notches 15 are used to support the circuit board 13 .

[0025] In this embodiment, four positioning rods 17 are fixedly installed on the top of the test shell 1, and four positioning grooves 18 are opened at the bottom of the shell cover 16. The positioning rods 17 are adapted to the positioning grooves 18; the shell cover 16 is connected with the four positioning grooves 18 through the four positioning rods 17, so that the shell cover 16 can be positioned.

[0026] In this embodiment, the pressure mechanism 2 includes two pressure rods 21, and the two pressure rods 21 are fixedly installed on the bottom of the shell cover 16. The same rectangular bar 22 is installed on the bottom of the two pressure rods 21, and two groups of card grooves 23 are opened on the outer side of the rectangular bar 22. Two sliding holes 24 are opened on both sides of the test shell 1, and handle bars 28 are set on both sides of the test shell 1. Two card rods 25 are fixedly installed on the inner side of the two handle bars 28. The inner end of the card rod 25 is inclined, and the card rod 25 is adapted to the corresponding card groove 23; the card rod 25 enters the card groove 23 to fix the rectangular bar 22.

[0027] In this embodiment, an elastic groove 26 is provided at the bottom of the clamping rod 25, and an elastic block 29 is fixedly installed on the inner wall of the bottom of the sliding hole 24. The elastic block 29 is slidably connected to the inner wall of the corresponding elastic groove 26, and a spring 27 is fixedly installed between the elastic block 29 and the inner wall of the elastic groove 26; the spring 27 provides elastic force for the clamping rod 25.

[0028] In this embodiment, the extrusion structure includes a trapezoidal block 3, which is fixedly installed at the bottom of the rectangular bar 22. The inner side of the trapezoidal block 3 is an inclined surface, and a rubber pad 31 is provided on the inner side of the trapezoidal block 3; the rectangular bar 22 drives the rubber pad 31 to press and fix the circuit board 13 through the trapezoidal block 3.

[0029] Working principle: when in use, turn on the power supply, the first switching circuit breaker and the second switching circuit breaker are connected to the power grid, the first input transformer is connected to the first switching circuit breaker, the second switching circuit breaker is connected between the first input transformer and the second input transformer, the second input transformer is connected to the power grid disturbance simulation converter through the seventh switching circuit breaker, the power grid disturbance simulation converter is connected to the first output transformer through the eighth switching circuit breaker, and the filter capacitor cabinet is connected to the second output transformer through the fourth switching circuit breaker. A set of equipment can be used to implement grid adaptability testing of wind turbines incorporated into multiple voltage levels, and the results are displayed on the display 11. The circuit board 13 needs to be installed, and the circuit board 13 is placed in the two notches 15 of the two support members 14. The shell cover 16 is connected to the four positioning grooves 18 through four positioning rods 17. The shell cover 16 drives the two rectangular bars 22 to move downward through four pressure rods 21. The rectangular bar 22 drives the rubber pad 31 to press and fix the circuit board 13 through the trapezoidal block 3. The spring 27 provides elastic force for the clamping rod 25, and the clamping rod 25 enters the corresponding clamping groove 23, so that the rectangular bar 22 can be locked and fixed, and then the shell cover 16 is fixed, and the two handle bars 28 are pulled away from each other. The handle bars 28 drive the two clamping rods 25 away from each other. The clamping rod 25 leaves the corresponding clamping groove 23, and the fixation of the rectangular bar 22 can be released. All structures in this application can be selected in terms of material and length according to actual usage. The accompanying drawings are all schematic structural diagrams, and the specific actual dimensions can be appropriately adjusted.

[0030] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A power grid adaptability test device, comprising a test shell (1), wherein a circuit board (13) is arranged inside the test shell (1), and a first, a second, a fourth, a fifth, a seventh and an eighth switching circuit breaker and a power grid disturbance simulation converter are arranged on the circuit board (13), and a display (11) and an interface (12) are arranged outside the test shell (1), and the circuit board (13) is connected to the display (11) and the interface (12), characterized in that: Two support members (14) are arranged in the test shell (1), and the circuit board (13) is placed on the two support members (14). A shell cover (16) is movably mounted on the top of the test shell (1), and two pressure mechanisms (2) are symmetrically arranged at the bottom of the shell cover (16). Both pressure mechanisms (2) are provided with extrusion structures, and both extrusion structures are compatible with the circuit board (13).

2. The grid adaptability testing device according to claim 1, characterized in that: The tops of the two support members (14) are each provided with a notch (15), and the circuit board (13) is placed in the two notches (15).

3. The grid adaptability testing device according to claim 1, characterized in that: Four positioning rods (17) are fixedly mounted on the top of the test shell (1), and four positioning grooves (18) are provided on the bottom of the shell cover (16), and the positioning rods (17) are matched with the positioning grooves (18).

4. The grid adaptability testing device according to claim 1, characterized in that: The pressure mechanism (2) comprises two pressure rods (21), both of which are fixedly mounted on the bottom of the shell cover (16), and the bottom of the two pressure rods (21) is mounted with a same rectangular strip (22), and the outer side of the rectangular strip (22) is provided with two groups of slots (23).

5. The grid adaptability testing device according to claim 1, characterized in that: Two sliding holes (24) are provided on both sides of the test shell (1), and handle bars (28) are provided on both sides of the test shell (1). Two clamping rods (25) are fixedly installed on the inner sides of the two handle bars (28), and the inner ends of the clamping rods (25) are inclined, and the clamping rods (25) are adapted to the corresponding clamping slots (23).

6. The grid adaptability testing device according to claim 5, characterized in that: The bottom of the clamping rod (25) is provided with an elastic groove (26), and an elastic block (29) is fixedly installed on the inner wall of the bottom of the sliding hole (24). The elastic block (29) is slidably connected with the inner wall of the corresponding elastic groove (26), and a spring (27) is fixedly installed between the elastic block (29) and the inner wall of the elastic groove (26).

7. The grid adaptability testing device according to claim 4, characterized in that: The extrusion structure comprises a trapezoidal block (3), the trapezoidal block (3) is fixedly mounted on the bottom of the rectangular strip (22), the inner side of the trapezoidal block (3) is arranged as an inclined surface, and a rubber pad (31) is arranged on the inner side of the trapezoidal block (3).

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