Mutual inductor live-line verification system

Abstract

The invention belongs to the technical field of power system mutual inductors, and discloses a mutual inductor live-line verification system, which comprises a loading assembly, a communication part is connected to the loading assembly, a control part is connected to one end of the loading assembly, and a plurality of buffer parts are connected to one end, far away from the control part, of the loading assembly; the loading assembly comprises a shell, a loading cavity is formed in the shell, a protector is arranged in the loading cavity in a connected mode and communicates with the loading assembly through a communicating part, meanwhile, after the loading assembly is placed on a plane, the stability of the loading assembly is corrected through a buffering part, and when the loading assembly fluctuates, the buffering part is used for buffering the loading assembly. And fluctuation can be offset through the buffer part, the situation that the internal structure of the loading assembly is loosened, and the verification accuracy of the verification system is affected is avoided, meanwhile, the working condition of the verification system can be recognized and controlled through the control part, and the working precision of the verification system is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of transformers in power systems, and in particular relates to a live transformer calibration system. Background Art

[0002] As the foundation for accurate and fair energy trading, energy metering systems must be durable and highly accurate. Currently, calibration of the entire metering system is performed component by component, specifically verifying the ratio and angle differences of voltage and current transformers, measuring the secondary voltage drop of voltage transformers, and verifying the error of energy meters. Secondary measurement equipment in the metering system undergoes periodic on-site inspections. The calibration cycle for measuring transformers is longer than that for secondary circuit measurements. Therefore, it is possible for transformers to experience out-of-tolerance or other accuracy issues during the calibration cycle. However, currently, on-site transformer accuracy verification must be performed while the equipment is powered off.

[0003] Patent application number CN201810159326.7 discloses a live access device and a transformer calibration system. The live access device includes a voltage-equalizing ring, a fixed structure, a damping resistor, a closed structure, a limit baffle, and an elastic structure. One end of the damping resistor is flexibly connected to the voltage-equalizing ring, and the other end is connected to the fixed structure. One end of the closed structure is connected to the end of the voltage-equalizing ring, and the end of the closed structure away from the voltage-equalizing ring passes through the fixed structure and is fixed to the fixed structure. The limit baffle is arranged between the closed structure and the damping resistor. The elastic structure is arranged between the limit baffle and the fixed structure. When the standard transformer rises, causing pressure to be generated between the live access device and the high-voltage transformer conductor, the elastic structure elastically expands and contracts under the pressure and applies pressure to the voltage-equalizing ring through the closed structure, so that the voltage-equalizing ring is in continuous contact with the high-voltage transformer conductor, thereby ensuring the safety and effectiveness of the live online calibration test. However, during use, the stability and safety of the calibration device cannot be guaranteed.

[0004] During the inspection of the transformer, since the transformer is in normal working condition at this time, vibration will occur during the inspection process, affecting the use of the calibration system, causing the calibration system to have large errors during the calibration process, affecting the accuracy of the transformer data.

[0005] Therefore, a live calibration system for transformers is proposed to address the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the above problems. The present invention provides a live calibration system for a mutual inductor, which has the advantages of good inspection effect and high stability.

[0007] To achieve the above object, the present invention provides the following technical solution: a transformer live calibration system, comprising a loading assembly, wherein a connecting portion is connected to the loading assembly, one end of the loading assembly is connected to a control portion, and an end of the loading assembly away from the control portion is connected to a plurality of buffer portions; The loading assembly includes a shell, a loading chamber is defined in the shell, a protector is connected to the loading chamber, the protector is connected to the connecting portion, a winding assembly is connected to one end of the protector away from the connecting portion, a resistance portion is provided on a side of the winding assembly away from the protector, a sleeve assembly is connected to one end of the resistance portion away from the winding assembly, a movable plate is connected to one end of the sleeve assembly away from the resistance portion, and the movable plate slides in the loading chamber; The sleeve assembly includes a sleeve rod connected to the interference portion, a movable rod is slidably provided in the sleeve rod, and one end of the movable rod away from the sleeve rod is connected to the movable plate, wherein the movable rod is made of conductive material.

[0008] Preferably, the loading assembly further comprises a restraining plate, the restraining plate being fixedly connected in the loading cavity, and the sleeve rod being slidably connected to the restraining plate; A sliding groove is provided on the inner wall of the loading cavity, and the movable plate is slidably connected in the sliding groove.

[0009] Preferably, a pressure spring is connected between the restraining plate and the movable plate, and a telescopic rod is connected to one end of the movable plate away from the pressure spring.

[0010] Preferably, the winding assembly includes a primary winding coil and a secondary winding coil, and the winding coil and the secondary winding coil are both connected to the protector, the winding coil and the secondary winding coil are connected to each other through a cable at one end away from the protector, and the interference part can be connected to the cable in an interference manner.

[0011] Preferably, the buffer portion includes a connecting portion, one end of the connecting portion is connected to the loading assembly, the end of the connecting portion away from the loading assembly is connected to an elastic portion, and the end of the elastic portion away from the connecting portion is connected to a contact portion.

[0012] Preferably, a shock absorbing component is movably provided in the connecting portion, an end of the shock absorbing component away from the contact portion is connected with a movable component, and an end of the movable component away from the shock absorbing component is connected with a connecting disk.

[0013] Preferably, the shock absorbing assembly includes a shock absorbing spring, one end of the shock absorbing spring is connected to the contact portion, and the other end is connected to a connecting plate, and the connecting plate is connected to the movable assembly.

[0014] Preferably, the movable component includes a buffer rod, one end of the buffer rod is connected to the connecting plate, the end of the buffer rod away from the connecting plate is connected to the connecting disk, and a plurality of rotating rods are connected to the outer periphery of the connecting disk, and the end of the rotating rod away from the connecting disk is connected to the connecting part.

[0015] Preferably, a protection component is connected to the inner part of the connection portion, and a buffer material is connected to the inner part of the protection component.

[0016] Preferably, the connecting disk is composed of a fixed part and a movable part, and the rotating rod is connected to the movable part.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. It is connected with the loading assembly through the connecting part. At the same time, after the loading assembly is placed on the plane, the stability of the loading assembly is corrected by the buffer part. When the loading assembly fluctuates, the fluctuation can also be offset by the buffer part to avoid the internal structure of the loading assembly from loosening, affecting the calibration accuracy of the calibration system. At the same time, the working status of the calibration system can be identified and controlled by the control part, thereby improving the working accuracy of the calibration system.

[0018] 2. Through the control unit set up, the verification components in each area of ​​the verification system can be controlled, and the detection results of the transformer can be displayed to ensure the accuracy of the transformer during the verification process. During the verification process, the winding components and the conflict part can be regulated by the control unit.

[0019] 3. The stability of the loading assembly during use is ensured by the mutual cooperation between the provided buffer part, the shock-absorbing component and its movable component. At the same time, when the loading assembly shakes, the graded cooperation between the shock-absorbing component and the movable component is used to achieve graded shock absorption of the loading assembly, thereby ensuring the safety of the verification system during the verification process. When the loading assembly shakes violently, the protective component can be controlled by the movable component to prompt the material inside the protective component to fill the buffer part, thereby improving its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall device of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the overall device of the present invention; Figure 3 Schematic diagram of the cross-sectional structure of the sleeve assembly of the present invention; Figure 4 Schematic diagram of the connection structure of the buffer portion of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the buffer portion of the present invention; Figure 6 Schematic diagram of the cross-sectional structure of the buffer portion of the present invention; Figure 7 Schematic diagram of the connection structure of the connection disk of the present invention.

[0021] Description of the drawings: 1. Loading assembly; 101. Shell; 102. Loading chamber; 1021. Slide groove; 103. Constraint plate; 104. Movable plate; 2. Control unit; 3. Connecting unit; 4. Protector; 5. Winding assembly; 501. Primary winding coil; 502. Secondary winding coil; 6. Interference unit; 7. Sleeve assembly; 701. Sleeve rod; 702. Movable rod; 8. Pressure spring; 9. Telescopic rod; 10. Buffer unit; 1001. Contact unit; 1002. Connecting unit; 1003. Elastic unit; 11. Shock-absorbing assembly; 1101. Shock-absorbing spring; 1102. Connecting plate; 12. Protective assembly; 13. Movable assembly; 1301. Buffer rod; 1302. Rotating rod; 14. Connecting disk. DETAILED DESCRIPTION

[0022] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] like Figure 1-Figure 7 As shown, a transformer live verification system includes a loading assembly 1 for device installation and fixation, a connecting portion 3 is connected to the loading assembly 1, and is connected to the transformer through the provided connecting portion 3, and then the current state passing through the transformer is transmitted by the connecting portion 3, so that the verification system in the loading assembly 1 can detect it, one end of the loading assembly 1 is connected to a control portion 2 for regulating and identifying the verification system, and the end of the loading assembly 1 away from the control portion 2 is connected to multiple buffer portions 10, and the buffer portions 10 are used to ensure that the loading assembly 1 will not be affected by external environmental factors during use, thereby ensuring the data accuracy of the verification system during the verification process.

[0024] Furthermore, during the use of the mutual inductor calibration system, the connecting part 3 is used to connect with the loading component 1. At the same time, after the loading component 1 is placed on a plane, the buffer part 10 is used to correct the stability of the loading component 1. When the loading component 1 fluctuates, the buffer part 10 can also offset the fluctuation to avoid the internal structure of the loading component 1 from loosening, which affects the calibration accuracy of the calibration system. At the same time, the working condition of the calibration system can be identified and controlled by the control part 2 to improve the working accuracy of the calibration system.

[0025] The loading component 1 includes a shell 101, and a loading cavity 102 for placing components is opened in the shell 101, wherein a protector 4 is connected to the loading cavity 102, and the protector 4 is connected to the connecting portion 3. The protector 4 is used to reduce the current entering the verification system to ensure that the verification system will not be impacted by a strong current during the verification process, thereby ensuring safety during use. A winding component 5 is connected to one end of the protector 4 away from the connecting portion 3, wherein the safety and transmission standards of the power system are ensured by the winding component 5, and the data accuracy of the mutual inductor during the verification process is ensured. A resistance part 6 is provided on the side of the winding component 5 away from the protector 4, and the resistance part 6 can be with The winding assemblies 5 are in contact with each other, so that the current passing through the winding assemblies 5 can be transmitted through the contact part 6. The end of the contact part 6 away from the winding assembly 5 is connected with a sleeve assembly 7, and the end of the sleeve assembly 7 away from the contact part 6 is connected with a movable plate 104, wherein the movable plate 104 is provided with a detection circuit for calibrating the transformer. The movable plate 104 slides in the loading chamber 102. By controlling the movable plate 104 to slide in the loading chamber 102, the sleeve assembly 7 is driven to move, prompting the contact part 6 to contact the winding assembly 5, ensuring that the current passing through the transformer can be identified after passing through the winding assembly 5 and the contact part 6, thereby judging the usage status of the transformer.

[0026] It should be noted that the measurement signal of the mutual inductor can be identified by the movable plate 104 , and the identification signal is displayed by the control unit 2 , thereby ensuring the accuracy of the mutual inductor detection process.

[0027] In order to ensure that the electrical signal of the interference part 6 can reach the movable plate 104 after contacting the winding assembly 5, the sleeve assembly 7 includes a sleeve rod 701, which is connected to the interference part 6. A movable rod 702 is slidably provided in the sleeve rod 701, wherein when the movable rod 702 is connected to the sleeve rod 701, the movable rod 702 does not contact the interference part 6, thereby ensuring the safety of the device when not working, and preventing accidental contact in an unsafe state when external factors are uncertain. The end of the movable rod 702 away from the sleeve rod 701 is connected to the movable plate 104, wherein the movable rod 702 is made of conductive material, and in order to ensure that the sleeve rod 701 can protect the movable rod 702, the sleeve rod 701 is set to an insulating material.

[0028] During the use of the device, the movable plate 104 moves, thereby driving the movable rod 702 to slide inside the sleeve rod 701, causing the sleeve rod 701 to contact the resistance part 6. At this time, the movable plate 104 continues to move, which will drive the sleeve assembly 7 and the resistance part 6 to move, so that the resistance part 6 is in contact and connected with the winding assembly 5.

[0029] In order to ensure the stability of the sleeve assembly 7, the loading assembly 1 further includes a constraint plate 103, which is fixedly connected to the loading chamber 102, and the constraint plate 103 is located on the side of the movable plate 104 close to the interference portion 6, and the sleeve rod 701 is slidably connected to the constraint plate 103, wherein the friction between the sleeve rod 701 and the constraint plate 103 is less than the friction between the movable rod 702 and the sleeve rod 701, and then in the process of moving the movable plate 104, the movable plate 104 first drives the movable rod 702 to move, and after the movable rod 702 contacts the interference portion 6, the movement of the movable plate 104 will drive the sleeve rod 701 and the constraint plate 103 to slide relative to each other.

[0030] In order to ensure the moving path and moving height of the movable plate 104 , a sliding groove 1021 is opened on the inner wall of the loading chamber 102 , and the movable plate 104 is slidably connected in the sliding groove 1021 .

[0031] In order to ensure the identification of the moving path of the movable plate 104 of the device and the control of its moving rate during the movement, a pressure spring 8 is further connected between the constraint plate 103 and the movable plate 104, and a telescopic rod 9 is connected to the end of the movable plate 104 away from the pressure spring 8. The movement of the telescopic rod 9 drives the sliding of the movable plate 104, and in the process of the telescopic rod 9 controlling the movement of the movable plate 104, the pressure spring 8 will be compressed. At the same time, the movement of the movable plate 104 is judged by observing the elastic changes and compression depth of the pressure spring 8 to ensure the safety of the device during use.

[0032] Furthermore, the winding assembly 5 includes a primary winding coil 501 and a secondary winding coil 502, and the primary winding coil 501 and the secondary winding coil 502 are both connected to the protector 4. The primary winding coil 501 and the secondary winding coil 502 are connected at one end away from the protector 4 through a cable, and the resistance part 6 can be connected to the cable in a resistance manner. By coordinating the primary winding coil 501 and the secondary winding coil 502, different coordination methods can be selected according to different verification requirements, ensuring diversity in the mutual inductor verification process. At the same time, the connection between the primary winding coil 501 and the secondary winding coil 502 can avoid the current from being connected, ensuring that there will be no current interference during the use of the winding assembly 5.

[0033] Since the loading component 1 may have an uneven surface or vibrate and bump during use, which may affect the use of the internal components of the loading component 1, the buffer portion 10 further includes a connecting portion 1002, one end of the connecting portion 1002 is connected to the loading component 1, and an elastic portion 1003 is connected to the end of the connecting portion 1002 away from the loading component 1, and a contact portion 1001 is connected to the end of the elastic portion 1003 away from the connecting portion 1002, wherein the contact portion 1001 contacts the contact surface, and after the contact portion 1001 contacts the contact surface, the elastic portion 1003 is compressed under the action of the gravity of the loading component 1, thereby ensuring the stability of the loading component 1 during use.

[0034] In order to improve the buffering force of the elastic part 1003 during use and enhance its safety, a shock-absorbing component 11 is movably provided in the connecting part 1002, and a movable component 13 is connected to the end of the shock-absorbing component 11 away from the contact part 1001. Through the mutual cooperation between the shock-absorbing component 11 and the movable component 13, when the placement plane shakes, the contact part 1001 will be driven to move, thereby driving the elastic part 1003 to move telescopically. In this process, the movement of the contact part 1001 drives the shock-absorbing component 11 to perform a first-level shock absorption, and then the amplitude of the shock-absorbing component 11 is buffered by the movable component 13, ensuring that the amplitude of the shock-absorbing component 11 during use will not interfere with the stability of the loading component 1, thereby improving the numerical stability of the verification system during the verification process without interference.

[0035] In order to ensure that the shock-absorbing assembly 11 can effectively support the elastic part 1003 and at the same time alleviate the shaking amplitude of the loading assembly 1 during use, the shock-absorbing assembly 11 further includes a shock-absorbing spring 1101, one end of the shock-absorbing spring 1101 is connected to the contact part 1001, and the other end is connected to a connecting plate 1102, and the connecting plate 1102 is connected to the movable assembly 13, so that the reciprocating movement of the shock-absorbing spring 1101 is used to offset the vibration at the contact part 1001, and at the same time, the reciprocating movement of the shock-absorbing spring 1101 is used to weaken the amplitude of the fluctuation, thereby improving the comfort of the loading assembly 1 during use.

[0036] In order to avoid the unstable damping efficiency of the damping spring 1101 and to further ensure that the loading assembly 1 can still be in a normal working state when encountering a large amplitude, the movable assembly 13 is further connected with a connecting disk 14 at one end away from the damping assembly 11. The movable assembly 13 includes a buffer rod 1301, one end of the buffer rod 1301 is connected to the connecting plate 1102, and the end of the buffer rod 1301 away from the connecting plate 1102 is connected to the connecting disk 14, wherein the length of the buffer rod 1301 can be controlled by the control unit 2, thereby realizing the adjustment of the height of the connecting disk 14. In this way, the buffering state of the buffer rod 1301 can be adjusted according to different usage environments to ensure the normal operation of the loading assembly 1, and a plurality of rotating rods 1302 are provided on the periphery of the connecting disk 14, and the rotating rod 1302 is connected to the connecting part 1002 at one end away from the connecting disk 14, wherein the two ends of the rotating rod 1302 distributed along the length direction are respectively hinged on the connecting disk 14 and the connecting part 1002, and then when the length of the buffer rod 1301 is adjusted, the angle of the rotating rod 1302 will be adjusted, thereby realizing the adjustment of the buffering force of the buffer part 10 and its reduction of fluctuation time.

[0037] In order to avoid the situation where the buffering efficiency of the device decreases due to excessive amplitude or aging of the buffer part 10, a protective component 12 is further connected to the connecting part 1002, wherein the protective component 12 is preferably a rubber capsule, and a buffer material is connected to the protective component 12. On the one hand, when the elastic part 1003 is over-compressed, the buffer material in the protective component 12 can be used for effective buffering. On the other hand, when the buffer rod 1301 is over-compressed, the connecting disk 14 can be used to destroy the protective component 12, thereby releasing the buffer material in the protective component 12, improving the buffering performance of the buffer part 10, and ensuring the stability of the loading component 1 during use. In order to ensure that the connecting disk 14 can meet the needs of cutting off the protective component 12, the connecting disk 14 is composed of a fixed part and a movable part, and the rotating rod 1302 is hinged to the movable part. When the buffer rod 1301 changes in height, it will drive the angle of the rotating rod 1302 to change, thereby driving the relative movement between the movable part and the fixed part, so that the position of the movable part protrudes out of the area of ​​the fixed part and contacts the protective component 12.

[0038] It should be noted that in order to ensure normal cooperation between the movable part and the fixed part, the movable part is elastically connected to the fixed part, so that as the height of the buffer rod 1301 changes, the movable part can be prompted to perform normal working adjustments.

[0039] When the transformer needs to be calibrated, the connecting part 3 is first connected to the transformer so that the current passing through the transformer can enter the loading component 1 through the connecting part 3, and then the changes in the electrical signal entering the loading component 1 are analyzed, and the detected signal is displayed through the control part 2 to obtain the calibration result.

[0040] Before the test begins, the telescopic rod 9 is extended by regulating the control unit 2, and the movable plate 104 is regulated to move along the slide groove 1021 according to the extension length of the telescopic rod 9, thereby driving the movable rod 702 to move in the sleeve rod 701, and driving the pressure spring 8 to compress, ensuring the stable movement of the movable plate 104, and when the movable rod 702 conflicts with the interference part 6 in the sleeve rod 701, the movable plate 104 continues to move, and at the same time drives the sleeve rod 701 and the constraint plate 103 to slide relative to each other, thereby driving the interference part 6 to move, so that the interference part 6 is in conflict with the winding assembly 5, so that the winding assembly 5 is connected with the interference part 6, ensuring that the device can realize the calibration of the mutual inductor.

[0041] When the current passes through the connecting part 3, it first prompts the electrical signal to pass through the protector 4, reducing the impact of the electrical signal on the verification system and ensuring the stability of the system during the verification process, so that the current passing through the protector 4 passes through the winding assembly 5. At the same time, the working states of the primary winding coil 501 and the secondary winding coil 502 are adjusted according to the actual measurement requirements to perform verification under different states according to the use of the mutual inductor. The electrical signal passing through the winding assembly 5 is transmitted to the resistance part 6, and then introduced into the movable plate 104 through the movable rod 702. The electrical signal received by the movable plate 104 is analyzed, and the analysis results are uploaded to the control part 2.

[0042] During the placement of the loading component 1, the buffer portion 10 contacts the placement platform, and the elastic portion 1003 is compressed according to the weight of the loading component 1, thereby ensuring the stability of the loading component 1 during use. When the loading component 1 is in normal use, the buffer portion 10 is in a stable state to maintain the stability of the loading component 1 and ensure the normal verification of the verification system.

[0043] When the placement platform shakes slightly, the contact part 1001 will cause the elastic part 1003 to compress, thereby causing the shock-absorbing spring 1101 to compress and driving the connecting plate 1102 to move, thereby reducing the vibration amplitude and ensuring the stability of the loading component 1 during inspection.

[0044] When the placement platform shakes greatly, when the shock-absorbing spring 1101 is compressed, the connecting plate 1102 is prompted to move. After the shock absorption and buffering of the shock-absorbing component 11, if the shaking amplitude cannot be effectively offset, the buffer rod 1301 is driven to change elastically through the connecting plate 1102, thereby driving the angle of the rotating rod 1302 to change, realizing the movement of the connecting plate 14, enhancing the shock absorption effect of the shock-absorbing component 11, and improving the stability of the device. At this time, the connecting plate 14 will not cause damage to the protective component 12, and if the elastic part 1003 is over-compressed at this time, the protective component 12 will also buffer it, thereby improving safety in use.

[0045] When the placement platform shakes too much, the increased rotation of the rotating rod 1302 will drive the movable part to contact the protective component 12, prompting the movable part to cut the protective component 12, prompting the elastic object in the protective component 12 to be discharged, and filling the interior of the buffer part 10 to improve its shock absorption performance, further ensure the stability of the loading component 1 during use, and reduce the error of the verification value of the verification system.

[0046] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0047] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A live calibration system for a mutual inductor, comprising a loading assembly (1), characterized in that: The loading assembly (1) is connected to a connecting portion (3), one end of the loading assembly (1) is connected to a control portion (2), and one end of the loading assembly (1) away from the control portion (2) is connected to a plurality of buffer portions (10); The loading assembly (1) comprises a shell (101), a loading chamber (102) is provided in the shell (101), a protector (4) is connected to the loading chamber (102), the protector (4) is connected to the connecting portion (3), a winding assembly (5) is connected to one end of the protector (4) away from the connecting portion (3), a resistance portion (6) is provided on the side of the winding assembly (5) away from the protector (4), a sleeve assembly (7) is connected to one end of the resistance portion (6) away from the winding assembly (5), a movable plate (104) is connected to one end of the sleeve assembly (7) away from the resistance portion (6), and the movable plate (104) slides in the loading chamber (102); The sleeve assembly (7) comprises a sleeve rod (701), the sleeve rod (701) being connected to the abutment portion (6), a movable rod (702) being slidably provided in the sleeve rod (701), and an end of the movable rod (702) away from the sleeve rod (701) being connected to the movable plate (104), wherein the movable rod (702) is made of a conductive material.

2. The live transformer calibration system according to claim 1, characterized in that: The loading assembly (1) further comprises a restraining plate (103), wherein the restraining plate (103) is fixedly connected in the loading cavity (102), and the sleeve rod (701) is slidably connected to the restraining plate (103); A sliding groove (1021) is provided on the inner wall of the loading cavity (102), and the movable plate (104) is slidably connected in the sliding groove (1021).

3. The live transformer calibration system according to claim 2, characterized in that: A pressure spring (8) is connected between the constraint plate (103) and the movable plate (104), and a telescopic rod (9) is connected to one end of the movable plate (104) away from the pressure spring (8).

4. The live transformer calibration system according to claim 1, characterized in that: The winding assembly (5) comprises a primary winding coil (501) and a secondary winding coil (502), and both the primary winding coil (501) and the secondary winding coil (502) are connected to the protector (4). The ends of the primary winding coil (501) and the secondary winding coil (502) away from the protector (4) are connected via a cable, and the abutting portion (6) can be abutted against the cable.

5. The live transformer calibration system according to claim 1, characterized in that: The buffer portion (10) comprises a connecting portion (1002), one end of the connecting portion (1002) is connected to the loading assembly (1), an end of the connecting portion (1002) away from the loading assembly (1) is connected to an elastic portion (1003), and an end of the elastic portion (1003) away from the connecting portion (1002) is connected to a contact portion (1001).

6. The live transformer calibration system according to claim 5, characterized in that: A shock absorbing component (11) is movably provided in the connecting portion (1002), an end of the shock absorbing component (11) away from the contact portion (1001) is connected to a movable component (13), and an end of the movable component (13) away from the shock absorbing component (11) is connected to a connecting disk (14).

7. The live transformer calibration system according to claim 6, characterized in that: The shock absorbing assembly (11) comprises a shock absorbing spring (1101), one end of the shock absorbing spring (1101) is connected to the contact portion (1001), and the other end is connected to a connecting plate (1102), and the connecting plate (1102) is connected to the movable assembly (13).

8. The live transformer calibration system according to claim 7, characterized in that: The movable component (13) includes a buffer rod (1301), one end of the buffer rod (1301) is connected to the connecting plate (1102), and one end of the buffer rod (1301) away from the connecting plate (1102) is connected to the connecting disk (14), and a plurality of rotating rods (1302) are connected to the periphery of the connecting disk (14), and one end of the rotating rod (1302) away from the connecting disk (14) is connected to the connecting portion (1002).

9. The live transformer calibration system according to claim 5, characterized in that: A protective component (12) is connected to the inner portion of the connecting portion (1002), and a buffer material is connected to the inner portion of the protective component (12).

10. The live transformer calibration system according to claim 8, characterized in that: The connecting disk (14) consists of a fixed portion and a movable portion, and the rotating rod (1302) is connected to the movable portion.

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