Extra-high voltage AC / DC voltage divider test method

Abstract

The invention relates to an extra-high voltage AC / DC voltage divider test method, and the method comprises the following steps: S1, controlling an AC voltage divider, a DC voltage divider and a voltage-sharing assembly in a first state to rotate until the AC voltage divider, the DC voltage divider and the voltage-sharing assembly are in a second state; s2, inflating a pressure equalizing cover in the pressure equalizing assembly; when a direct-current test is needed, the positions of the voltage-sharing assembly and the direct-current voltage divider are locked, the alternating-current voltage divider is controlled to rotate until the alternating-current voltage divider is in a first state, and the direct-current test is carried out through the direct-current voltage divider; and when an alternating current test is needed, the positions of the voltage-sharing assembly and the alternating current voltage divider are locked, the direct current voltage divider is controlled to rotate until the direct current voltage divider is in a first state, and the alternating current test is carried out through the alternating current voltage divider. According to the test method for the extra-high voltage alternating current and direct current voltage divider, the test efficiency of the extra-high voltage alternating current and direct current voltage divider can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of voltage divider testing, and in particular to a method for testing an ultra-high voltage AC and DC voltage divider. Background Art

[0002] The commissioning, handover test and operation and maintenance tests of the UHV power transmission and transformation project before commissioning are all carried out on site at the UHV substation. Before the test, the DC voltage divider, AC voltage divider and other related test equipment need to be transported to the UHV substation site by means of transportation, and then assembled and built on site. Since the test device can only install one voltage divider, during the DC and AC test process, after completing the DC or AC test, the voltage divider needs to be disassembled and another voltage divider installed. The above steps result in low test efficiency for the UHV AC and DC voltage dividers. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a UHV AC and DC voltage divider test method, which can improve the test efficiency of the UHV AC and DC voltage divider.

[0004] In order to solve the above technical problems, the present invention provides a method for testing ultra-high voltage AC and DC voltage dividers, comprising the following steps: S1: controlling the AC voltage divider, the DC voltage divider and the voltage equalizing assembly in the first state to rotate until the AC voltage divider, the DC voltage divider and the voltage equalizing assembly are in the second state; S2: inflating the voltage equalizing cover in the voltage equalizing assembly; when a DC test is required: locking the positions of the voltage equalizing assembly and the DC voltage divider, controlling the rotation of the AC voltage divider until the AC voltage divider is in the first state, and performing a DC test through the DC voltage divider; when an AC test is required: locking the positions of the voltage equalizing assembly and the AC voltage divider, controlling the rotation of the DC voltage divider until the DC voltage divider is in the first state, and performing an AC test through the AC voltage divider.

[0005] In one embodiment of the present invention, a movable frame and a base are further provided, and the AC voltage divider, the DC voltage divider and the voltage equalizing assembly can be snap-connected to the movable frame, and the movable frame is hinged to the base. A first driving member is hinged between the movable frame and the base, and the first driving member drives the movable frame to rotate.

[0006] In one embodiment of the present invention, the pressure equalizing assembly also includes a support column, which connects the support column to the pressure equalizing cover, and the movable frame includes a first groove, which is used to accommodate the support column. The movable frame is provided with a first clamping mechanism for clamping the support column. After the first clamping mechanism clamps the support column, the first driving member drives the pressure equalizing assembly to rotate through the movable frame.

[0007] In one embodiment of the present invention, the movable frame also includes a second groove, the second groove is used to accommodate the DC voltage divider, and the movable frame is provided with a second clamping mechanism for clamping the DC voltage divider. After the second clamping mechanism clamps the DC voltage divider, the first driving member drives the DC voltage divider to rotate through the movable frame.

[0008] In one embodiment of the present invention, the movable frame also includes a third groove, the third groove is used to accommodate the AC voltage divider, and the movable frame is provided with a third clamping mechanism for clamping the AC voltage divider. After the third clamping mechanism clamps the AC voltage divider, the first driving member drives the DC voltage divider to rotate through the movable frame.

[0009] In one embodiment of the present invention, the base is provided with a plurality of fixing seats corresponding to the positions of the AC voltage divider, the DC voltage divider and the voltage balancing component, and the fixing seats are provided with the locking mechanism, and the positions of the AC voltage divider, the DC voltage divider and the voltage balancing component are locked by the locking mechanism.

[0010] In one embodiment of the present invention, a connecting member is further provided, wherein the voltage balancing assembly includes a first base plate for abutting against the fixing base, the DC voltage divider is connected to a second base plate for abutting against the fixing base, the AC voltage divider is connected to a third base plate for abutting against the fixing base, the connecting member is used to connect the first base plate and the second base plate, and the connecting member is also used to connect the second base plate and the third base plate.

[0011] In one embodiment of the present invention, the base is also provided with a first support seat, a second support seat and a third support seat for resisting the movable frame. The first support seat, the second support seat and the third support seat are arranged in sequence away from the first driving member and their heights increase successively.

[0012] In one embodiment of the present invention, after the DC test or the AC test, a return step is also included to vent the pressure equalizing hood, unlock the positions of the AC voltage divider, the DC voltage divider and the voltage equalizing assembly, so that the AC voltage divider, the DC voltage divider and the voltage equalizing assembly are in the first state.

[0013] In one embodiment of the present invention, a plurality of supporting legs are provided on the edge of the base, and the supporting legs include telescopic columns. The step S1 also includes a supporting step, and the telescopic columns extend outward and abut against the supporting position.

[0014] The above technical solution of the present invention has the following advantages compared with the prior art:

[0015] The invention discloses a method for testing ultra-high voltage AC and DC voltage dividers. By setting a first clamping mechanism, a second clamping mechanism and a third clamping mechanism, an AC voltage divider, a DC voltage divider and a voltage-equalizing component can be fixed to a movable frame. The movable frame is driven to rotate by a first driving member, thereby driving the AC voltage divider, the DC voltage divider and the voltage-equalizing component to switch between a first state and a second state, so that the DC voltage divider and the voltage-equalizing component can be in the second state at the same time, and a DC test can be performed at this time. The AC voltage divider and the voltage-equalizing component can be in the second state at the same time, and an AC test can be performed at this time. In the process of switching between the DC test and the AC test, there is no need to disassemble and replace the voltage divider, and only the DC voltage divider and the AC voltage divider need to be rotated, thereby improving the test efficiency of the ultra-high voltage AC and DC voltage dividers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a flow chart of a test method of a UHV AC and DC voltage divider of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the application of the UHV AC and DC voltage divider test method;

[0019] Figure 3 It is a schematic diagram of the assembly structure of the base and the movable frame;

[0020] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0021] Figure 5 It is a schematic diagram of the assembly structure of an AC voltage divider, a DC voltage divider, a voltage balancing component and a movable frame;

[0022] Figure 6 It is a schematic diagram of the structure during DC test;

[0023] Figure 7 It is a structural diagram of AC test.

[0024] Explanation of the reference numerals in the specification: 1. base; 2. movable frame; 3. voltage-equalizing assembly; 4. DC voltage divider; 5. AC voltage divider; 6. connector; 11. fixing seat; 12. supporting foot; 13. first supporting seat; 14. second supporting seat; 15. third supporting seat; 16. locking mechanism; 17. connecting seat; 18. movable seat; 21. first driving member; 22. first groove; 23. first clamping mechanism; 24. second groove; 25. second clamping mechanism; 26. third groove; 27. third clamping mechanism; 31. supporting column; 32. first bottom plate; 33. air pipe; 34. voltage-equalizing cover; 41. second bottom plate; 51. third bottom plate. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1 As shown, a UHV AC and DC voltage divider testing method of the present invention comprises the following steps: S1: controlling the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 in the first state to rotate until the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 are in the second state; S2: inflating the voltage equalizing cover 34 in the voltage equalizing component 3; when a DC test is required: locking the positions of the voltage equalizing component 3 and the DC voltage divider 4, controlling the AC voltage divider 5 to rotate until the AC voltage divider 5 is in the first state, and performing a DC test through the DC voltage divider 4; when an AC test is required: locking the positions of the voltage equalizing component 3 and the AC voltage divider 5, controlling the DC voltage divider 4 to rotate until the DC voltage divider 4 is in the first state, and performing an AC test through the AC voltage divider 5.

[0027] In the present embodiment, a UHV AC / DC voltage divider test method is provided, wherein the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 are arranged on a test platform. The first state of the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 is a non-working state, and the second state is a working state. The first state and the second state of the AC voltage divider 5 and the DC voltage divider 4 are switched by rotation, so that the DC voltage divider 4 and the voltage equalizing component 3 can be in the second state at the same time, and a DC test can be performed at this time. The AC voltage divider 5 and the voltage equalizing component 3 can be in the second state at the same time, and an AC test can be performed at this time. In the process of switching between the DC test and the AC test, there is no need to disassemble and replace the voltage divider, and only the DC voltage divider 4 and the AC voltage divider 5 need to be rotated, thereby improving the test efficiency of the UHV AC / DC voltage divider 4.

[0028] Reference Figures 2 to 5As shown, the UHV AC and DC voltage divider test method also provides a movable frame 2 and a base 1, and the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing assembly 3 can be connected to the movable frame 2. The movable frame 2 is hinged to the base 1 so that the movable frame 2 can rotate. A first driving member 21 is hinged between the movable frame 2 and the base 1. The first driving member 21 can be regarded as a hydraulic cylinder. The base 1 is provided with a hydraulic control box, a hydraulic pump and a hydraulic valve group that cooperate with the first driving member 21. One end of the first driving member 21 is hinged to the base 1, and the other end of the first driving member 21 is hinged to the movable frame 2. The output end of the first driving member 21 is extended and retracted, thereby driving the movable frame 2 to rotate. Preferably, the hinged position between the movable frame 2 and the output end of the first driving member 21 protrudes away from the base 1, so that the first driving member 21 drives the movable frame 2 to rotate in a larger range. Preferably, the edge of the base 1 is provided with a plurality of supporting legs 12. In this embodiment, the supporting legs 12 are located at the four corners of the base 1. The supporting legs 12 include telescopic columns extending downward, which can abut against the ground, the test bench, etc., so as to support the base 1. The provision of the supporting legs 12 enables the base 1 and the test component to be transported by a transportation vehicle. After reaching the supporting position, the telescopic columns extend outward, so that the base 1 can be away from the transportation vehicle. At this time, the transportation vehicle drives away from the base 1, and finally the telescopic columns retract, so that the base 1 abuts against the supporting position. Therefore, before step S1, a supporting step is also included, in which the telescopic columns of the supporting legs 12 extend outward and abut against the supporting position.

[0029] The pressure equalizing assembly 3 includes a support column 31 and a pressure equalizing cover 34, and the pressure equalizing cover 34 is connected to the top of the support column 31. An air pipe 33 is provided on the support column 31, one end of the air pipe 33 is connected to the pressure equalizing cover 34, and the other end of the air pipe 33 is connected to the air pump, and the pressure equalizing cover 34 can be inflated by the air pump. The movable frame 2 includes an arc-shaped first groove 22, the first groove 22 is used to accommodate the support column 31, and the first groove 22 is located in the middle position of one side of the movable frame 2. The movable frame 2 is provided with a first clamping mechanism 23 for clamping the support column 31, the first clamping mechanism 23 includes an arc-shaped first clamping claw that can fit with the support column 31, and the first clamping claw is driven by a driving member to clamp the support column 31, so that the support column 31 is fixed in the first groove 22, so that the pressure equalizing assembly 3 is fixed to the movable frame 2 as a whole. After the first clamping mechanism 23 clamps the support column 31, the first driving member 21 drives the pressure equalizing assembly 3 to rotate through the movable frame 2. The pressure equalizing assembly 3 further includes a first bottom plate 32 , and the first bottom plate 32 is connected to the bottom of the supporting column 31 .

[0030] The DC voltage divider 4 is cylindrical in shape as a whole, and the movable frame 2 further includes an arc-shaped second groove 24, which is used to accommodate the DC voltage divider 4. The movable frame 2 is provided with a second clamping mechanism 25 for clamping the DC voltage divider 4, and the second clamping mechanism 25 includes an arc-shaped second clamping claw that can fit with the DC voltage divider 4. The second clamping claw is driven by a driving member to clamp the DC voltage divider 4, so that the DC voltage divider 4 is fixed in the second groove 24, that is, the DC voltage divider 4 is fixed to the movable frame 2. After the second clamping mechanism 25 clamps the DC voltage divider 4, the first driving member 21 drives the DC voltage divider 4 to rotate through the movable frame 2. The bottom of the DC voltage divider 4 is connected to a second bottom plate 41.

[0031] The AC voltage divider 5 is cylindrical as a whole, and the movable frame 2 also includes an arc-shaped third groove 26, which is used to accommodate the AC voltage divider 5, and the first groove 22 is located between the second groove 24 and the third groove 26. The movable frame 2 is provided with a third clamping mechanism 27 for clamping the AC voltage divider 5, and the third clamping mechanism 27 includes an arc-shaped third clamping claw that can fit with the AC voltage divider 5. The third clamping claw is driven by a driving member to clamp the AC voltage divider 5, so that the AC voltage divider 5 is fixed in the third groove 26, that is, the AC voltage divider 5 is fixed to the movable frame 2. After the third clamping mechanism 27 clamps the AC voltage divider 5, the first driving member 21 drives the AC voltage divider 5 to rotate through the movable frame 2. The bottom of the AC voltage divider 5 is connected to a third bottom plate 51.

[0032] The base 1 is also provided with a plurality of fixed seats 11 corresponding to the positions of the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3, that is, the fixed seat 11 is located at the bottom of the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 when they are in the second state, that is, the first bottom plate 32, the second bottom plate 41 and the third bottom plate 51 are all used to abut against the fixed seat 11. The fixed seat 11 is provided with a locking mechanism 16, and the first bottom plate 32, the second bottom plate 41 and the third bottom plate 51 are locked by the locking mechanism 16, so that the position of the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 is locked. Specifically, the locking mechanism 16 includes a connecting seat 17 and a movable seat 18, the connecting seat 17 is connected to the side wall of the fixed seat 11 and extends outward, the movable seat 18 is hinged to the connecting seat 17, and a fastener is connected between the movable seat 18 and the fixed seat 11, the movable seat 18 abuts against the first bottom plate 32 and is fixed by the fastener, so that the first bottom plate 32 and the fixed seat 11 are relatively fixed, and the voltage equalizing component 3 is locked in position. The position locking method of the DC voltage divider 4 and the AC voltage divider 5 is the same as that of the voltage balancing component 3, and will not be repeated. Preferably, the UHV AC and DC voltage divider test method also provides a connector 6, which can be threadedly connected to the fastener, and is connected to the first bottom plate 32 and the second bottom plate 41 at the same time through the connector 6, so that the voltage balancing component 3 and the DC voltage divider 4 are relatively fixed, and is connected to the first bottom plate 32 and the third bottom plate 51 at the same time through the connector 6, so that the voltage balancing component 3 and the AC voltage divider 5 are relatively fixed.

[0033] The base 1 is also provided with a first support seat 13, a second support seat 14 and a third support seat 15 for abutting against the movable frame 2. The first support seat 13, the second support seat 14 and the third support seat 15 are arranged in sequence in a direction away from the first driving member 21 and their heights increase in sequence. The first support seat 13, the second support seat 14 and the third support seat 15 are all used to abut against the movable frame 2. When the AC voltage divider 5, the DC voltage divider 4 and the voltage balancing assembly 3 are in the first state, the movable frame 2 abuts against the first support seat 13, the second support seat 14 and the third support seat 15, and the movable frame 2 forms an acute angle with the base 1.

[0034] Reference Figure 6 As shown, when a DC test is needed after the AC test, the DC voltage divider 4 is controlled to rotate until the DC voltage divider 4 is in the second state, the position of the AC voltage divider 5 is unlocked, the position of the DC voltage divider 4 is locked, and the AC voltage divider 5 is controlled to rotate until the AC voltage divider 5 is in the first state, and a DC test is performed through the DC voltage divider 4.

[0035] Reference Figure 7As shown, when an AC test is required after the DC test, the AC voltage divider 5 is controlled to rotate until the AC voltage divider 5 is in the second state, the position of the DC voltage divider 4 is unlocked, the position of the AC voltage divider 5 is locked, and the DC voltage divider 4 is controlled to rotate until the DC voltage divider 4 is in the first state, and the AC test is performed through the AC voltage divider 5.

[0036] After the DC test or AC test, a return step is also included, in which the voltage equalizing cover 34 is vented, the positions of the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 are unlocked, and the movable frame 2 is driven to rotate by the first driving member 21, so that the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 are in the first state. Finally, the telescopic column of the supporting foot 12 is extended, the transport tool moves to the bottom of the base 1, and the telescopic part retracts again. At this time, the base 1 is located on the transport tool, so that the base 1 and the test component can be driven to move by the transport tool.

[0037] The present invention provides a method for testing a UHV AC and DC voltage divider. By means of the arrangement of a first clamping mechanism 23, a second clamping mechanism 25 and a third clamping mechanism 27, an AC voltage divider 5, a DC voltage divider 4 and a voltage equalizing component 3 can be fixed to a movable frame 2. The movable frame 2 is driven to rotate by a first driving member 21, thereby driving the AC voltage divider 5, the DC voltage divider 4 and the voltage equalizing component 3 to switch between a first state and a second state, thereby enabling the DC voltage divider 4 and the voltage equalizing component 3 to be in the second state at the same time, at which time a DC test can be performed. The AC voltage divider 5 and the voltage equalizing component 3 can be in the second state at the same time, at which time an AC test can be performed. During the conversion process between the DC test and the AC test, the voltage divider does not need to be disassembled and replaced, and only the DC voltage divider 4 and the AC voltage divider 5 need to be rotated, thereby improving the test efficiency of the UHV AC and DC voltage divider 4.

[0038] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A method for testing ultra-high voltage AC and DC voltage dividers, characterized in that: The following steps are involved: S1: Controlling the AC voltage divider, the DC voltage divider and the voltage balancing component in the first state to rotate until the AC voltage divider, the DC voltage divider and the voltage balancing component are in the second state; S2: Inflating the pressure equalizing cover in the pressure equalizing assembly; When a DC test is required: locking the positions of the voltage balancing assembly and the DC voltage divider, controlling the AC voltage divider to rotate until the AC voltage divider is in the first state, and performing a DC test through the DC voltage divider; When an AC test is required: lock the positions of the voltage balancing assembly and the AC voltage divider, control the rotation of the DC voltage divider until the DC voltage divider is in the first state, and perform an AC test through the AC voltage divider.

2. The UHV AC / DC voltage divider test method according to claim 1, characterized in that: A movable frame and a base are also provided. The AC voltage divider, the DC voltage divider and the voltage balancing assembly can be snap-connected to the movable frame, and the movable frame is hinged to the base. A first driving member is hinged between the movable frame and the base, and the first driving member drives the movable frame to rotate.

3. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: The pressure equalizing assembly also includes a support column, which connects the support column to the pressure equalizing cover. The movable frame includes a first groove, which is used to accommodate the support column. The movable frame is provided with a first clamping mechanism for clamping the support column. After the first clamping mechanism clamps the support column, the first driving member drives the pressure equalizing assembly to rotate through the movable frame.

4. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: The movable frame also includes a second groove, which is used to accommodate the DC voltage divider. The movable frame is provided with a second clamping mechanism for clamping the DC voltage divider. After the second clamping mechanism clamps the DC voltage divider, the first driving member drives the DC voltage divider to rotate through the movable frame.

5. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: The movable frame also includes a third groove, which is used to accommodate the AC voltage divider. The movable frame is provided with a third clamping mechanism for clamping the AC voltage divider. After the third clamping mechanism clamps the AC voltage divider, the first driving member drives the DC voltage divider to rotate through the movable frame.

6. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: The base is provided with a plurality of fixing seats corresponding to the positions of the AC voltage divider, the DC voltage divider and the voltage balancing component, and the fixing seats are provided with the locking mechanism, through which the positions of the AC voltage divider, the DC voltage divider and the voltage balancing component are locked.

7. The UHV AC / DC voltage divider test method according to claim 6, characterized in that: A connecting piece is also provided, and the voltage balancing assembly includes a first base plate for abutting against the fixing seat, the DC voltage divider is connected to a second base plate for abutting against the fixing seat, and the AC voltage divider is connected to a third base plate for abutting against the fixing seat. The connecting piece is used to connect the first base plate and the second base plate, and the connecting piece is also used to connect the second base plate and the third base plate.

8. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: The base is also provided with a first support seat, a second support seat and a third support seat for resisting against the movable frame. The first support seat, the second support seat and the third support seat are arranged in sequence away from the first driving member and their heights increase in sequence.

9. The UHV AC / DC voltage divider test method according to claim 1, characterized in that: After the DC test or AC test, a return step is also included, in which the pressure equalizing hood is vented, the positions of the AC voltage divider, the DC voltage divider and the voltage equalizing component are unlocked, and the AC voltage divider, the DC voltage divider and the voltage equalizing component are in the first state.

10. The UHV AC / DC voltage divider test method according to claim 2, characterized in that: A plurality of supporting legs are provided at the edge of the base, and the supporting legs include telescopic columns. The step S1 also includes a supporting step, and the telescopic columns extend outward and abut against the supporting position.

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