A UHV power transformer calibration component and a calibration vehicle

Abstract

The present invention relates to an ultra-high voltage power transformer calibration component and a calibration vehicle, comprising a calibration mechanism arranged in a box body, and a box cover that is driven by an electric push rod to rotate and open and close the box top opening; a movable seat slides in and out of the box top opening inside the box body; the calibration mechanism is provided with more than one set of wiring members on a mounting rod, and the wiring members are used in conjunction with the power transformer; a calibration instrument electrically connected to the wiring members is mounted on the top of the movable seat; the box cover and the rotating plate are connected by a first transmission structure, and the box cover and the movable seat are connected by a second transmission structure; the box cover is driven to rotate by controlling the electric push rod to achieve opening or closing, and in this process, the movable seat is simultaneously ejected or retracted from the inside of the box body and the mounting rod is rotated up and down, thereby greatly improving the calibration efficiency of the transformer in the power system; when the box cover is in a closed state, the entire calibration mechanism is stored inside the box body, effectively avoiding the problem of damage to the calibration instrument caused by impact from foreign objects.

Description

Technical Field

[0001] The present invention relates to the technical field of power transformer calibration, and in particular to an ultra-high voltage power transformer calibration component and a calibration vehicle. Background Art

[0002] The power transformer operating on-site in the power network with ultra-high voltage level is an important part of the power network high-voltage metering and power trade settlement. Its accuracy directly affects the fairness and justice of the power market. According to the national metrology verification regulations JJG1021, it should be regularly or periodically subjected to high-voltage metrology verification and traced back to the national standards to ensure its accuracy. Generally, a calibration vehicle is required to calibrate the power transformer.

[0003] For example, the "on-site calibration vehicle for power transformers" disclosed in patent announcement number CN101561482B includes a driver's cabin and a carriage with a door at the rear. The carriage includes a control room at the front end and an equipment compartment at the rear of the control room. The equipment compartment includes an integral frame arranged horizontally at the front end thereof, various current transformer calibration instruments and measurement and control devices installed on the integral frame and leading their high voltage and high current to the outside of the roof through a lead-out device, and a high-voltage calibration device that is liftably arranged in the middle of the equipment compartment. A translational electric sunroof corresponding to the position of the high-voltage calibration device is opened on the top of the carriage, and the high-voltage calibration device is controllably exposed to the outside of the roof through the translational electric sunroof to complete the calibration of the voltage transformer under high voltage.

[0004] However, although quick on-site wiring can be achieved by leading the output of the calibration equipment out to the roof for on-site wiring, the calibration equipment on the roof is not safely protected when not in operation and is easily damaged by falling foreign objects. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a UHV power transformer calibration assembly and a calibration vehicle to solve the above problems.

[0006] The present invention provides the following technical solutions:

[0007] A UHV power transformer calibration assembly includes a calibration mechanism disposed in a box body and a box cover that is driven by an electric push rod to rotate and open and close the top opening of the box body;

[0008] The verification mechanism is mounted on the top of the movable seat, and the movable seat slides in and out of the top opening of the box body inside the box body;

[0009] The calibration mechanism includes a fixed seat, a rotating plate rotatably connected to the fixed seat, a mounting rod provided at a position of the rotating plate offset from the rotation center, and one or more wiring members arranged along the length of the mounting rod, the wiring members being used in conjunction with the power transformer;

[0010] A calibration instrument electrically connected to the wiring member is installed on the top of the movable seat;

[0011] The box cover and the rotating plate are connected via a first transmission structure, so that the opening and closing of the box cover controls the rotation of the rotating plate;

[0012] The box cover and the movable seat are connected via a second transmission structure, so that the opening and closing of the box cover controls the lifting and lowering of the movable seat.

[0013] Preferably, the terminal block includes a movable sleeve mounted on the mounting rod, one end of the movable sleeve is fixedly connected to a connector, one end of the connector is electrically connected to the power transformer through a wire, and the other end of the connector is connected to the circuit of the calibration instrument through a wire.

[0014] Preferably, the outer side of the movable sleeve is threadedly connected with a positioning bolt, and the threaded end of the positioning bolt is in abutment with the mounting rod.

[0015] Preferably, the first transmission structure comprises a worm wheel and a worm that mesh with each other, and the worm wheel is coaxially fixedly connected to the rotation center of the rotating plate;

[0016] The first transmission structure also includes a cam, which is fixedly connected to one end of the worm, and the side wall of the cam is rotatably connected to the first connecting rod, and the end of the first connecting rod away from the cam is rotatably connected to the second connecting rod, and the end of the second connecting rod away from the first connecting rod is fixedly connected to the inner wall of the box cover.

[0017] Preferably, the second transmission structure includes a sliding rod and a support rod hinged to the bottom of the movable seat, one end of the sliding rod is hinged to the support rod, and the other end of the sliding rod is provided with a linkage member that drives the sliding rod to move by cooperating with the rotation of the box cover.

[0018] Preferably, the linkage member includes a mounting seat, the mounting seat is fixedly connected to the outside of the box body, the upper part of the mounting seat is rotatably connected to a first gear, and the rotation center of the box cover is coaxially fixedly connected to a second gear, and the second gear is meshed with the first gear;

[0019] It also includes a third gear, which is rotatably connected to the lower part of the mounting seat and meshes with the second gear. The third gear is coaxially fixedly connected to the rotating seat, and the rotating seat is rotatably connected to the end of the slide rod away from the lower end of the third gear.

[0020] Preferably, a guide rail is fixedly connected to the inner side of the box body, and the movable seat is slidably connected to the corresponding guide rail.

[0021] Preferably, the box cover has multiple groups of microstrip patch antenna units arranged in an array built in, and also includes an electromagnetic field strength meter for detecting external electromagnetic interference. The multiple groups of microstrip patch antenna units arranged in an array block and shield the direction with the strongest electromagnetic interference based on the monitoring results of the electromagnetic field strength meter.

[0022] Preferably, the number of microstrip patch antenna units is n, and the multiple groups of microstrip patch antenna units arranged in an array are controlled by an adaptive minimum mean square error algorithm, and the specific steps are as follows:

[0023] Initialize the weight coefficient w of each microstrip patch antenna unit m (0), m=1, 2,,,, n; set the step size factor ;

[0024] At each sampling time k, the signals of n microstrip patch antenna units are collected , m=1,2,,,,n; and form them into input vectors ;

[0025] Calculate the output signal of the antenna array according to the current weight coefficient ,in ;

[0026] Calculate the error signal: Direct the direction of the strongest electromagnetic interference With output signal Subtract and get the error signal ;

[0027] According to the update formula of LMS algorithm Update the weight coefficients and repeat the above steps until the weight coefficients converge, that is, the error signal Reached minimum value.

[0028] Preferably, the angle between the microstrip patch antenna unit as the center, the calibration instrument arranged in a line as the x-axis, and the direction of the strongest electromagnetic interference monitored by the electromagnetic field strength measuring instrument is α;

[0029] The position and working status of each calibration instrument will affect the reverse cancellation of multiple groups of microstrip patch antenna units arranged in an array;

[0030] Defining the influence factors of calibration instruments ,in represents the distance between the i-th calibration instrument and the multiple groups of microstrip patch antenna units arranged in an array, Indicates the working status of the i-th calibration instrument; when the calibration instrument is not working ,but ;When the calibration instrument is working , , where k1 is the characteristic coefficient related to the calibration instrument, and R is the attenuation coefficient exponent 2;

[0031] Consider the coupling between the two calibration instruments: ,in It is the coupling coefficient related to the electromagnetic characteristics of the calibration instrument;

[0032] Constructing a comprehensive influence function ,in is the sum of the effects of all calibration instruments, The interaction between the two calibration instruments is taken into account;

[0033] Adjust according to the angle α formed by the three ;

[0034] The direction of the strongest electromagnetic interference Make corrections: .

[0035] A calibration vehicle, wherein the ultra-high voltage power transformer calibration component is arranged on the vehicle body, and the top of the vehicle body is provided with a lifting mechanism for driving the ultra-high voltage power transformer calibration component to move in the vertical direction.

[0036] The present invention has the following beneficial technical effects:

[0037] When the present invention is working, by controlling the electric push rod to drive the box cover to rotate and be in the open state, the second transmission structure can drive the movable seat to move upward, so that the movable seat is pushed out from the inside of the box body. At the same time, the first transmission structure drives the rotating plate to rotate, so that the installation rod rotates upward and all the wiring parts are lifted. Then, each wiring part is connected to the circuit of the corresponding power transformer, and then each wiring part is connected to the circuit of the calibration instrument. In this way, the calibration instrument can calibrate multiple power transformers at the same time, greatly improving the calibration efficiency of the transformers in the power system.

[0038] After the calibration is completed, the box cover is driven to rotate and be in a closed state by controlling the electric push rod, so that the second transmission structure can drive the movable seat to move downward, so that the movable seat drives the entire calibration mechanism to be stored inside the box body. This allows the box cover to protect the calibration mechanism and effectively avoid damage to the calibration instrument caused by impact from foreign objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 Schematic diagram of the structure of the verification mechanism of the present invention;

[0041] Figure 3 for Figure 2 A magnified schematic diagram of a local area A;

[0042] Figure 4 Schematic diagram of the structure of the first transmission structure of the present invention;

[0043] Figure 5 Schematic diagram of the structure of the second transmission structure of the present invention;

[0044] Figure 6 It is a structural schematic diagram of the linkage member of the present invention;

[0045] Figure 7 It is a structural schematic diagram of the verification vehicle of the present invention.

[0046] The reference numerals in the figures are:

[0047] 1. Box body; 2. Movable seat; 3. Calibration mechanism; 31. Fixed seat; 32. Rotating plate; 33. Mounting rod; 34. Terminal piece; 341. Movable sleeve; 342. Connector; 343. Positioning bolt; 35. Calibration instrument; 36. First transmission structure; 361. Worm gear; 362. Worm; 363. Cam; 364. First connecting rod; 365. Second connecting rod; 4. Box cover; 5. Electric push rod; 6. Second transmission structure; 61. Sliding rod; 62. Support rod; 63. Guide rail; 64. Linkage member; 641. Mounting seat; 642. First gear; 643. Second gear; 644. Third gear; 645. Rotating seat; 10. Car body; 20. Lifting mechanism. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] Example:

[0050] A UHV power transformer calibration component, such as Figure 1-7As shown, it includes a box body 1 with an opening at the top, a box cover 4 is rotatably connected to the right end of the top of the box body 1, an electric push rod 5 is hinged on the outside of the box body 1, and the top of the electric push rod 5 is hinged to the outer wall of the box cover 4. The inside of the box body 1 is connected to a movable seat 2 for sliding up and down. A verification mechanism 3 is provided on the top of the movable seat 2. The verification mechanism 3 includes two fixed seats 31 fixed in parallel to the top wall of the movable seat 2. The inner sides of the two fixed seats 31 are both rotatably connected to a rotating plate 32. A mounting rod 33 is fixedly connected between the two rotating plates 32. The axial direction of the mounting rod 33 extends horizontally to the left and right. The mounting rod 33 is provided with a plurality of A wiring member 34 electrically connected to the power transformer, several wiring members 34 are distributed along the length (axial) direction of the mounting rod 33, one end of the top of the movable seat 2 is fixedly connected to several calibration instruments 35 electrically connected to the wiring member 34, and several calibration instruments 35 are independently arranged at equal intervals along the axial direction of the mounting rod 33. Among them, a first transmission structure 36 is provided on the outer side of a fixed seat 31 on the right side to drive the rotating plate 32 to rotate by rotating the box cover 4, and a second transmission structure 6 is provided at one end of the box body 1 to drive the movable seat 2 to move in the vertical direction by rotating the box cover 4.

[0051] During operation, the box cover 4 is driven to rotate and be in an open state by controlling the electric push rod 5. The box cover 4 in the open state is relatively in a vertical state, which can enable the second transmission structure 6 to drive the movable seat 2 to move upward, so that the movable seat 2 is pushed out from the inside of the box body 1. At the same time, the first transmission structure 36 drives the rotating plate 32 to rotate, so that the mounting rod 33 rotates upward and lifts all the wiring parts 34, and then each wiring part 34 is connected to the circuit of the corresponding power transformer, and then each wiring part 34 is connected to the circuit of its own calibration instrument 35, so that the calibration instrument 35 can calibrate multiple power transformers at the same time, which greatly improves the calibration efficiency of the transformer in the power system; one calibration instrument 35 can correspond to one wiring part 34 or multiple wiring parts 34.

[0052] After the verification is completed, by controlling the electric push rod 5 to drive the box cover 4 to rotate and be in a closed state, the second transmission structure 6 can drive the movable seat 2 to move downward, so that the movable seat 2 drives the entire verification mechanism 3 to be stored inside the box body 1. This allows the box cover 4 to protect the verification mechanism 3 and effectively avoid the problem of damage to the verification instrument 35 caused by impact from foreign objects.

[0053] The terminal block 34 includes a movable sleeve 341 that is sleeved on the mounting rod 33. One end of the movable sleeve 341 is fixedly connected to a connector 342. One end of the connector 342 is electrically connected to the corresponding power transformer via a wire, and the other end of the connector 342 is connected to the circuit of the calibration instrument 35 via a wire. A positioning bolt 343 is threadedly connected to the outer side of the movable sleeve 341, and the threaded end of the positioning bolt 343 can interfere with the mounting rod 33. By loosening the positioning bolt 343, the movable sleeve 341 can slide on the mounting rod 33, which can adjust the position of the movable sleeve 341 and the installation position of the connector 342, so that the connector 342 can better electrically connect with power transformers in different positions. After determining the installation position of the connector 342, the positioning bolt 343 is tightened to keep the movable sleeve 341 fixed to the mounting rod 33, thereby ensuring that the connector 342 and the power transformer remain stable during the calibration process.

[0054] The first transmission structure 36 includes a worm gear 361, which is coaxially fixedly connected to one of the rotating plates 32. A worm 362 is rotatably connected to one end of the top of the movable base 2, meshing with the worm gear 361. A cam 363 is fixedly connected to one end of the worm gear 362. A first connecting rod 364 is rotatably connected to the cam 363 at a position offset from its rotation center. A second connecting rod 365 is rotatably connected to the end of the first connecting rod 364 away from the cam 363. The end of the second connecting rod 365 away from the first connecting rod 364 is fixedly connected to the inner wall of the box cover 4. The electric push rod 5 drives the box cover 4 to rotate, causing the second connecting rod 365 to drive the first connecting rod 364 to rotate, thereby rotating the cam 363, causing the worm 362 to drive the worm gear 361 to rotate synchronously, thereby rotating the rotating plate 32, thereby causing the mounting rod 33 to rotate upward or downward, thereby raising or lowering all the connecting members 34.

[0055] The second transmission structure 6 includes a slide rod 61 that passes through the side wall of the box body 1. The left end of the slide rod 61 is hinged with a support rod 62. The top of the support rod 62 is hinged with the bottom of the movable seat 2. The inner side wall of the box body 1 is fixedly connected to two parallel guide rails 63. The movable seat 2 is slidably connected to the corresponding guide rails 63. The right end of the slide rod 61 is provided with a linkage member 64 that drives the slide rod 61 to slide by cooperating with the rotation of the box cover 4. The linkage member 64 includes a mounting seat 641. The mounting seat 641 is fixedly connected On the outside of the box body 1, the upper part of the inner side of the mounting seat 641 is rotatably connected to the first gear 642, and the box cover 4 is coaxially fixedly connected to the second gear 643 at its rotation point, and the second gear 643 is engaged with the first gear 642. The lower part of the inner side of the mounting seat 641 is rotatably connected to the third gear 644, and the third gear 644 is engaged with the second gear 643. The third gear 644 is fixedly connected to the rotating seat 645, and the lower end of the rotating seat 645 is rotatably connected to the right end of the slide rod 61.

[0056] The slide bar 61 is movably connected to the box body 1 through a hinge, so that the slide bar 61 can slide along the length (axis) direction of the slide bar 61 relative to the box body 1 and can rotate radially around the axis of the slide bar 61, thereby changing the angle of the rotating seat 645.

[0057] Working principle: During the verification work, the box cover 4 is driven to rotate and be in the open state by controlling the electric push rod 5, so that the second gear 643 rotates. Since the second gear 643 is meshed with the first gear 642, the first gear 642 will rotate synchronously, so that the third gear 644 rotates in the same direction as the second gear 643, which makes the rotating seat 645 rotate synchronously and applies a thrust to the slide rod 61, so that the slide rod 61 slides and applies a thrust to the support rod 62, which makes the support rod 62 push the movable seat 2 out of the inside of the box body 1. When the box cover 4 rotates, the second connecting rod 365 drives the first connecting rod 364 to rotate, which makes the cam 363 rotate, so that the worm 362 drives the worm wheel 361 to rotate synchronously, which makes the rotating plate 32 rotate, thereby making the mounting rod The cam 341 is rotated upward so that all the connectors 342 are lifted upward to facilitate wiring. By loosening the positioning bolts 343, the movable sleeve 341 can be slid on the mounting rod 33, so that the position of the movable sleeve 341 can be adjusted, and the installation position of the connector 342 can be adjusted so that the connector 342 can be better electrically connected to the power transformers at different positions. After determining the installation position of the connector 342, the positioning bolts 343 are tightened to keep the movable sleeve 341 and the mounting rod 33 fixed, and then each connector 342 is connected to the circuit of the corresponding power transformer, and then each connector 342 is connected to the circuit of the calibration instrument 35. In this way, the calibration instrument 35 can calibrate multiple power transformers at the same time, which greatly improves the calibration efficiency of the transformers in the power system.

[0058] After the calibration is completed, the box cover 4 is driven to rotate and be in the closed state by controlling the electric push rod 5, so that the second gear 643 rotates in the opposite direction, and the first gear 642 rotates in the opposite direction, which makes the rotating seat 645 rotate synchronously and applies a pulling force to the slide bar 61, so that the slide bar 61 slides and applies a pulling force to the support rod 62, and the movable seat 2 is stored in the box body 1, so that the box cover 4 protects the calibration mechanism 3, effectively preventing the calibration instrument 35 from being damaged by foreign objects.

[0059] During the rotation of the box cover 4, the second connecting rod 365 drives the first connecting rod 364 to rotate in the opposite direction, which causes the cam 363 to rotate, and the worm 362 drives the worm wheel 361 to rotate synchronously, which also causes the rotating plate 32 to rotate, thereby causing the mounting rod 33 to rotate downward, causing all the connecting heads 342 to lower downward for easy storage.

[0060] The present invention also provides a calibration vehicle, including an ultra-high voltage power transformer calibration assembly, a vehicle body 10 is provided below the ultra-high voltage power transformer calibration assembly, and a lifting mechanism 20 for driving the ultra-high voltage power transformer calibration assembly to move in a vertical direction is provided on the top of the vehicle body 10. The lifting mechanism 20 is a conventional lifting device (hydraulic rod, cylinder, etc.) in the prior art and will not be described in detail.

[0061] Example 2: includes all the contents of Example 1, except that:

[0062] Lid 4 houses multiple microstrip patch antenna units arranged in an array. It also includes an electromagnetic field strength meter for detecting external electromagnetic interference. The electromagnetic field strength meter is mounted on vehicle body 10. The arrayed microstrip patch antenna units, based on the electromagnetic field strength meter's monitoring results, block and shield the direction of the strongest electromagnetic interference. When the lid is open, the 32 microstrip patch antenna units are arranged in a rectangular array in a vertical plane.

[0063] The number of microstrip patch antenna units is n, where n=32. Multiple groups of microstrip patch antenna units arranged in an array are controlled by an adaptive minimum mean square error algorithm. The specific steps are as follows:

[0064] Initialize the weight coefficient w of each microstrip patch antenna unit m (0), usually the initial value can be set to zero or a random value, m = 1, 2,,,, n; set the step factor , step factor Determines the convergence speed and stability of the algorithm, usually needs to be adjusted through experiments, and is usually between 0.001 and 0.1;

[0065] At each sampling time k, the signals of n microstrip patch antenna units are collected , m=1,2,,,,n; and form them into input vectors ;

[0066] Calculate the output signal of the antenna array according to the current weight coefficient ,in ;

[0067] Calculate the error signal: Direct the direction of the strongest electromagnetic interference With output signal Subtract and get the error signal ;

[0068] According to the update formula of LMS algorithm Update the weight coefficients and repeat the above steps until the weight coefficients converge, that is, the error signal When the minimum value is zero, it means that the interference is completely canceled.

[0069] The angle between the microstrip patch antenna unit as the center, the inline calibration instrument 35 as the x-axis, and the direction of the strongest electromagnetic interference (pointing to the microstrip patch antenna unit) monitored by the electromagnetic field strength measuring instrument is α;

[0070] The position and working state of each calibration instrument 35 will affect the reverse cancellation performed by the multiple groups of microstrip patch antenna units arranged in the array;

[0071] Define the impact factor of calibration instrument 35 ,in Indicates the distance between the i-th calibration instrument 35 and the multiple groups of microstrip patch antenna units arranged in an array. The distance between the i-th calibration instrument 35 and the vertical box cover 4 can be taken as: Indicates the working status of the i-th calibration instrument 35; when the calibration instrument 35 is not working ,but ; When the calibration instrument 35 is working , ; Where k1 is the characteristic coefficient associated with the calibration instrument 35; R is the attenuation coefficient exponent taken as 2;

[0072] k1 is usually determined by experimental measurement. In the environment mentioned above, the direction with the strongest electromagnetic interference is set. and output signal The same value is used to put a single calibration instrument 35 in working state, record the interference changes of multiple groups of microstrip patch antenna units, and repeat the above measurement process by changing the distance between the single calibration instrument 35 and the multiple groups of microstrip patch antenna units of the array for many times. According to the measurement data, use Perform fitting to determine the appropriate k1 value;

[0073] Consider the coupling between the two calibration instruments 35: ,in It is the coupling coefficient related to the electromagnetic characteristics of the calibration instrument 35;

[0074] The value is usually between 0 and 1. The specific value determination process is as follows: Place two calibration instruments 35 in a relatively open laboratory environment with a relatively stable electromagnetic environment and measure the distance between them. , use electromagnetic field sensors, power meters, etc. to measure relevant electromagnetic parameters and record them separately The coupling effect between the two calibration instruments 35 under two working conditions is measured, and the additional electromagnetic radiation power generated by one calibration instrument 35 due to the other calibration instrument 35 is measured, or the electric field strength at a certain point inside one calibration instrument 35 under the excitation of the other calibration instrument 35 is measured; the above measurement process is repeated, and the measurement data is used to calculate the value of the electric field strength. Perform fitting to determine the appropriate value;

[0075] Constructing a comprehensive influence function ,in is the sum of the effects of all calibration instruments 35, The interaction between the calibration instruments 35 is considered;

[0076] Adjust according to the angle α formed by the three ;

[0077] The direction with the strongest electromagnetic interference Make corrections: ;

[0078] According to the final With output signal Subtract and get the error signal .

[0079] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A UHV power transformer calibration assembly, comprising a calibration mechanism (3) disposed in a box body (1), and a box cover (4) driven by an electric push rod (5) to rotate and open and close the top opening of the box body (1), characterized in that: The verification mechanism (3) is mounted on the top of the movable seat (2), and the movable seat (2) slides inside the box (1) and in and out of the top opening of the box (1); The calibration mechanism (3) comprises a fixed seat (31), a rotating plate (32) rotatably connected to the fixed seat (31), a mounting rod (33) being provided at a position deviating from the rotation center of the rotating plate (32), and one or more connecting pieces (34) arranged along the length direction of the mounting rod (33), the connecting pieces (34) being used in conjunction with a power transformer; A calibration instrument (35) electrically connected to the terminal (34) is installed on the top of the movable seat (2); The box cover (4) and the rotating plate (32) are connected via a first transmission structure (36), so that the opening and closing of the box cover (4) controls the rotation of the rotating plate (32); The box cover (4) and the movable seat (2) are connected via a second transmission structure (6), so that the opening and closing of the box cover (4) controls the lifting and lowering of the movable seat (2); The first transmission structure (36) comprises a worm wheel (361) and a worm (362) meshing with each other, and the worm wheel (361) is coaxially fixedly connected to the rotation center of the rotating plate (32); The first transmission structure (36) further comprises a cam (363), wherein the cam (363) is fixedly connected to one end of the worm (362), a side wall of the cam (363) is rotatably connected to a first connecting rod (364), an end of the first connecting rod (364) away from the cam (363) is rotatably connected to a second connecting rod (365), and an end of the second connecting rod (365) away from the first connecting rod (364) is fixedly connected to the inner wall of the box cover (4).

2. The UHV power transformer calibration component according to claim 1, characterized in that: The terminal (34) includes a movable sleeve (341) sleeved on the mounting rod (33), one end of the movable sleeve (341) is fixedly connected to a connector (342), one end of the connector (342) is electrically connected to the power transformer via a wire, and the other end of the connector (342) is connected to the circuit of the calibration instrument (35) via a wire.

3. The UHV power transformer calibration component according to claim 2, characterized in that: The outer side of the movable sleeve (341) is threadedly connected to a positioning bolt (343), and the threaded end of the positioning bolt (343) is in contact with the mounting rod (33).

4. The UHV power transformer calibration component according to claim 1, characterized in that: The second transmission structure (6) includes a slide rod (61) and a support rod (62) hinged to the bottom of the movable seat (2), one end of the slide rod (61) is hinged to the support rod (62), and the other end of the slide rod (61) is provided with a linkage member (64) that drives the slide rod (61) to move by cooperating with the rotation of the box cover (4).

5. The UHV power transformer calibration component according to claim 4, characterized in that: The linkage member (64) includes a mounting seat (641), the mounting seat (641) is fixedly connected to the outside of the box body (1), the upper portion of the mounting seat (641) is rotatably connected to a first gear (642), and the rotation center of the box cover (4) is coaxially fixedly connected to a second gear (643), and the second gear (643) is meshed with the first gear (642); It also includes a third gear (644), which is rotatably connected to the lower part of the mounting seat (641), and the third gear (644) is engaged with the second gear (643). The third gear (644) is coaxially fixedly connected to the rotating seat (645), and the rotating seat (645) is rotatably connected to the end of the slide rod (61) away from the lower end of the third gear (644).

6. The UHV power transformer calibration component according to claim 1, characterized in that: The box cover (4) has multiple groups of microstrip patch antenna units arranged in an array built in, and also includes an electromagnetic field strength meter for detecting external electromagnetic interference. The multiple groups of microstrip patch antenna units arranged in an array block and shield the direction with the strongest electromagnetic interference based on the monitoring results of the electromagnetic field strength meter.

7. The UHV power transformer calibration assembly according to claim 6, characterized in that: The number of microstrip patch antenna units is n, and the multiple groups of microstrip patch antenna units arranged in an array are controlled by an adaptive minimum mean square error algorithm. The specific steps are as follows: Initialize the weight coefficient w of each microstrip patch antenna unit m (0), m=1, 2,,,, n; set the step size factor ; At each sampling time k, the signals of n microstrip patch antenna units are collected , m=1,2,,,,n; and form them into input vectors ; Calculate the output signal of the antenna array according to the current weight coefficient ,in ; Calculate the error signal: Direct the direction of the strongest electromagnetic interference With output signal Subtract and get the error signal ; According to the update formula of LMS algorithm Update the weight coefficients and repeat the above steps until the weight coefficients converge, that is, the error signal Reached minimum value.

8. The UHV power transformer calibration assembly according to claim 7, characterized in that: The angle between the microstrip patch antenna unit as the center, the calibration instrument (35) arranged in a line as the x-axis, and the direction of the strongest electromagnetic interference monitored by the electromagnetic field intensity measuring instrument is α; The position and working state of each calibration instrument (35) will affect the reverse cancellation of the multiple groups of microstrip patch antenna units arranged in the array; Define the impact factor of the calibration instrument (35) ,in represents the distance between the i-th calibration instrument (35) and the multiple groups of microstrip patch antenna units arranged in an array, Indicates the working status of the i-th calibration instrument (35); when the calibration instrument (35) is not working ,but ; When the calibration instrument (35) is working , , where k1 is the characteristic coefficient related to the calibration instrument (35), R is the attenuation coefficient exponent taken as 2; Consider the coupling between the two calibration instruments (35): ,in is the coupling coefficient related to the electromagnetic characteristics of the calibration instrument (35); Constructing a comprehensive influence function ,in is the sum of the effects of all calibration instruments (35), The interaction between the two calibration instruments (35) is considered; Adjust according to the angle α formed by the three ; The direction of the strongest electromagnetic interference Make corrections: .

9. A calibration vehicle, characterized in that: The invention comprises an ultra-high voltage power transformer calibration assembly according to any one of claims 1 to 8, wherein the ultra-high voltage power transformer calibration assembly is arranged on a vehicle body (10), and a lifting mechanism (20) for driving the ultra-high voltage power transformer calibration assembly to move in a vertical direction is provided on the top of the vehicle body (10).

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