Loop impedance simulation device

Abstract

A loop impedance simulation device of the present invention relates to the technical field of loop impedance simulation, and comprises a base, a support is fixedly mounted on the base, a bearing frame is fixedly mounted at the top end of the support, a switching-on mechanism is arranged on the bearing frame, and the switching-on mechanism is composed of an assembling assembly used for assembling a knife switch and an opening and closing assembly used for driving the assembling assembly. An impedance monitoring body is further arranged on the base, the opening and closing assembly comprises a driven gear rotationally connected to the top end of the bearing frame, a rotating shaft seat is fixedly installed on the bearing frame, an arc-shaped receding groove is formed in the end, close to the driven gear, of the rotating shaft seat, and an arc-shaped gear ring driven by a servo motor is further arranged on a rotating shaft in the rotating shaft seat. The switch blade is driven to be opened and closed through a pure mechanical part, and a meshing structure of the arc-shaped gear ring and the driven gear is matched, so that the motion process of the switch blade is stable without offset, the problem of opening failure caused by high temperature of a traditional relay is avoided, and the continuity and reliability of loop impedance simulation are improved.

Description

Technical Field

[0001] This invention relates to the field of power systems, and more specifically to a device for simulating loop impedance during the commissioning, testing, and simulation of smart meters. Background Technology

[0002] Currently, with the construction of my country's smart grid, the corresponding electricity consumption monitoring has also undergone intelligent upgrades. Among them, one of the key devices for electricity consumption monitoring is the smart energy meter. As the core equipment for metering, billing, and electricity management, the stability of its operation and the accuracy of its metering are directly related to the efficiency of power grid operation and the rights and interests of users.

[0003] In the daily commissioning, performance testing, and fault simulation experiments of smart meters, the live-load switching operation is one of the core test scenarios. This operation essentially involves the internal control unit of the meter issuing commands to drive the built-in relay to complete the contact engagement (i.e., closing) and disengagement (i.e., opening), thus simulating the circuit switching process under actual power consumption scenarios such as user load switching, grid load adjustment, or fault conditions. Therefore, in the operation and testing scenarios of smart meters, the loop impedance (i.e., the degree of obstruction to current flow in an AC circuit) is a key parameter for evaluating circuit performance. This value not only directly affects the metering accuracy of the meter (e.g., impedance changes can lead to changes in current and voltage phase differences, thus affecting active power calculation), but is also closely related to the probability and energy magnitude of relay contact arcing.

[0004] However, in field tests conducted by operators using existing technology, it was found that at the instant the relay contacts close and open, due to the presence of energy storage components such as inductors and capacitors in the circuit and the sudden change in load current, an electric arc phenomenon (i.e., contact arcing) is easily generated between the contacts. The generation of this arc is accompanied by high temperature and high energy release. Long-term repeated action can lead to damage such as burning, oxidation, and welding of the relay contacts, making it impossible for the relay to smoothly perform opening and closing operations. Moreover, as the core switching element in the circuit, the magnetic latching relay (a new type of relay that uses permanent magnets to maintain the state of the contacts, belonging to automatic switching devices) itself has inherent contact resistance and coil DC resistance. After repeated closing and high temperature, the contact resistance of the relay will increase significantly due to contact oxidation and increased surface roughness, and the coil resistance will also increase with the temperature, causing deviations in the simulation data.

[0005] In summary, there is an urgent need for a new type of simulation device that can effectively solve the problem of arcing and damage to relay contacts when simulating energized and loaded circuit breaking and closing in smart energy meter testing. Summary of the Invention

[0006] To address the shortcomings of existing technologies in the daily commissioning, performance testing, and fault simulation of smart meters, this invention addresses the issues of arcing and damage to relay contacts during simulated energized and load-bearing circuit breaker operation in smart meter testing. Furthermore, when using magnetic latching relays for simulation, the relays, being circuit components, are prone to overheating and failure to open after repeated closing, and their internal resistance is easily damaged, leading to increased resistance and thus inaccurate simulation data. This invention provides a loop impedance simulation device that improves the continuity and reliability of loop impedance simulation, reduces interference from external resistance on test data, protects equipment and personnel safety, prevents fault escalation from affecting the test, and enhances the safety of the device's use.

[0007] The loop impedance simulation device of the present invention has the following specific structure:

[0008] A loop impedance simulation device, comprising a base, characterized in that:

[0009] A bracket is fixedly installed on the base, and a bearing frame is fixedly installed on the top of the bracket. The bearing frame is provided with a closing mechanism for opening and closing the circuit breaker. The closing mechanism consists of an assembly component for assembling the switch and an opening and closing component for driving the assembly component. The base is also provided with an impedance monitoring body for monitoring the opening and closing data of the switch, and the impedance monitoring body is connected to the switch electrical signal through a wire.

[0010] The opening and closing assembly includes a driven gear rotatably connected to the top of the support frame, and the gear shaft of the driven gear is rotatably connected to the support frame. A rotating shaft seat is fixedly installed on the support frame, and an arc-shaped clearance groove is provided at one end of the rotating shaft seat near the driven gear. The rotating shaft seat (31) also has an arc-shaped toothed ring driven by a servo motor. The arc-shaped toothed ring has integrally formed teeth distributed along its contour, and the arc-shaped toothed ring meshes with the driven gear through the teeth. A protective shell for supporting the assembly assembly is also fixedly installed on the side of the arc-shaped toothed ring away from the teeth.

[0011] According to a loop impedance simulation device of the present invention, the two ends of the arc-shaped toothed ring are respectively hinged to a driven connecting rod and an active swing rod, the end of the driven connecting rod away from the arc-shaped toothed ring is hinged to a rotating shaft in the rotating shaft seat, and the middle part of the active swing rod is also hinged to a rotating shaft in the rotating shaft seat.

[0012] According to a loop impedance simulation device of the present invention, the servo motor is fixedly mounted on a support frame, and the output shaft of the servo motor is drivenly connected to a power arm. The end of the power arm away from the servo motor is hinged to a hinge shaft, and the end of the hinge shaft away from the power arm is hinged to the end of the active swing rod away from the arc-shaped toothed ring.

[0013] According to a circuit impedance simulation device of the present invention, the protective housing is provided with a first insulating pad corresponding to the switch on the side away from the arc-shaped toothed ring, and the protective housing is also fixedly installed with side ears for limiting the deflection of the clamping arm, and the side ears are symmetrically distributed on both sides of the protective housing.

[0014] According to a circuit impedance simulation device of the present invention, the assembly assembly includes assembly sliders symmetrically distributed on both sides of a first insulating pad, and the assembly sliders are slidably connected in corresponding grooves in a protective housing. Each assembly slider is provided with a second insulating pad corresponding to a switch at one end near the first insulating pad, and a traction rod is provided at the other end of the assembly slider away from the second insulating pad.

[0015] According to a loop impedance simulation device of the present invention, the protective housing is further characterized in that a slide rod corresponding to the first insulating pad is fixedly installed in the protective housing, the slide rod is slidably connected to a traction slip ring along its axial direction, and the traction slip ring is also symmetrically distributed with limiting connecting rods hinged to a miniature cylinder.

[0016] According to a loop impedance simulation device of the present invention, the assembly assembly further includes a miniature cylinder for driving the assembly slider, the miniature cylinder being connected to an external pump body via a pipeline, the clamping arm being hinged to the piston rod in the miniature cylinder, another set of clamping arms being hinged to the other end of the miniature cylinder, and the clamping arm also having an integrally formed limiting end, the end of the limiting end away from the clamping arm being hinged to a corresponding limiting link.

[0017] According to a loop impedance simulation device of the present invention, the clamping arm is further provided with a through hole corresponding to the side ear, the clamping arm is rotatably connected to the corresponding side ear through the through hole, and one end of the clamping arm extending outside the protective housing is hinged to the end of the traction rod away from the assembly slider.

[0018] According to a loop impedance simulation device of the present invention, the impedance monitoring body is provided with a 15KVA 1:1 isolation transformer for mains power isolation, and the impedance monitoring body is also provided with a solid-state relay for three-phase current switching.

[0019] According to a loop impedance simulation device of the present invention, the impedance monitoring body is provided with a current column for connecting to a voltmeter and an ammeter, and the current column of the current column in the impedance monitoring body is also provided with a corresponding temperature detection module.

[0020] The following beneficial effects are achieved by using the loop impedance simulation device of the present invention: 1. The circuit impedance simulation device of the present invention drives the switch to open and close through purely mechanical components. With the meshing structure of the arc-shaped toothed ring and the driven gear, it ensures that the switch moves stably without deviation, avoids the problem of tripping failure caused by high temperature in traditional relays, and improves the continuity and reliability of circuit impedance simulation. 2. The loop impedance simulation device of the present invention provides a first insulating gasket in the protective housing and a second insulating gasket in the assembly slider. The double insulation structure can avoid the direct contact between the switch and the device components, thereby reducing the interference of external resistance on the test data. 3. The loop impedance simulation device of the present invention achieves mains power isolation through isolation transformer to ensure personal safety, and solid-state relays with arc-free switching to protect the lifespan of components. Combined with the over-temperature shutdown function of the temperature detection module and the heartbeat / timeout shutdown mechanism of the host computer, a multi-layer safety protection system is constructed, which not only protects the safety of equipment and personnel, but also avoids the expansion of faults and affects the test, thereby improving the safety of the device. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of a loop impedance simulation device according to the present invention;

[0022] Figure 2 This is a structural diagram of the closing mechanism of a loop impedance simulation device according to the present invention;

[0023] Figure 3 This is a structural diagram of the assembly and opening / closing components of a loop impedance simulation device according to the present invention.

[0024] Figure 4 This is a structural diagram of the opening and closing component of a loop impedance simulation device according to the present invention;

[0025] Figure 5 This is a structural diagram of an assembly component for a loop impedance simulation device according to the present invention;

[0026] Figure 6 This is a cross-sectional view of an assembly component for a loop impedance simulation device according to the present invention.

[0027] Figure 7 A loop impedance simulation device according to the present invention Figure 6 Enlarged structural diagram of part A;

[0028] Figure 8 This is a schematic diagram of the load simulation principle of a loop impedance simulation device according to the present invention.

[0029] In the diagram: 1. Base; 2. Bracket; 3. Bearing frame; 31. Rotary shaft seat; 4. Protective housing; 41. First insulating gasket; 42. Side ear; 43. Slide rod; 44. Traction slip ring; 441. Limiting link; 5. Impedance monitoring body; 6. Driven gear; 7. Arc-shaped toothed ring; 71. Tooth; 72. Driven link; 73. Active swing arm; 8. Servo motor; 81. Power arm; 82. Hinge shaft; 9. Assembly slider; 91. Second insulating gasket; 92. Traction rod; 10. Miniature cylinder; 101. Clamping arm; 1011. Limiting end; 1012. Through hole. Detailed Implementation

[0030] The technical means, creative features, achieved objectives, and effects of the loop impedance simulation device of the present invention will be further described below with reference to the accompanying drawings and embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] Example

[0032] like Figures 1 to 8As shown, the present invention provides a loop impedance simulation device, including a base 1, a bracket 2 fixedly mounted on the base 1, a support frame 3 fixedly mounted on the top of the bracket 2, a closing mechanism for opening and closing the circuit breaker on the support frame 3, the closing mechanism consisting of an assembly component for assembling the circuit breaker and an opening and closing component for driving the assembly component, an impedance monitoring body 5 for monitoring the opening and closing data of the circuit breaker on the base 1, and the impedance monitoring body 5 is connected to the circuit breaker electrical signal via a wire, the opening and closing component including a driven gear 6 rotatably connected to the top of the support frame 3, and the gear shaft of the driven gear 6 rotatably connected to the support frame 3, a rotating shaft seat 31 fixedly mounted on the support frame 3, and an arc-shaped clearance groove opened at the end of the rotating shaft seat 31 near the driven gear 6, an arc-shaped toothed ring 7 driven by a servo motor 8 on the rotating shaft of the rotating shaft seat 31, the arc-shaped toothed ring 7 having integrally formed teeth 71 distributed along its contour, and the arc-shaped toothed ring 7 meshing with the driven gear 6 through the teeth 71. A protective housing 4 for supporting the assembly components is also fixedly installed on the side of the arc-shaped toothed ring 7 away from the teeth 71. The base 1 provides basic support for the device to ensure stable operation. The bracket 2 supports the top support frame 3, suspending the moving structure of the device and facilitating the operation of the closing mechanism. The assembly components are responsible for assembling with the switch in the load box. The opening and closing components drive the assembly components to realize the switch action. The impedance monitoring body 5 can form a path with the switch through its own circuit elements or external components and wires to monitor relevant data during the opening and closing process of the switch, providing data support for circuit impedance simulation. The driven gear 6 can rotate on the support frame 3 through the gear shaft. The rotating shaft seat 31 avoids interference with the arc-shaped toothed ring 7 during movement through the arc-shaped clearance groove. The arc-shaped toothed ring 7 is indirectly driven by the servo motor 8, which can drive the protective housing 4 to swing around the rotating shaft seat 31 as the center, thereby realizing the reciprocating opening and closing of the switch on the load box, and transmitting power through meshing with the driven gear 6 through the teeth 71.

[0033] The two ends of the arc-shaped toothed ring 7 are respectively hinged to a driven connecting rod 72 and a driving swing rod 73. The end of the driven connecting rod 72 away from the arc-shaped toothed ring 7 is hinged to the rotating shaft in the rotating shaft seat 31. The middle part of the driving swing rod 73 is also hinged to the rotating shaft in the rotating shaft seat 31. Both the driven connecting rod 72 and the driving swing rod 73 are hinged to the rotating shaft in the rotating shaft seat 31 through miniature deep groove ball bearings. The driving swing rod 73 forms a lever structure, and its swinging motion drives the arc-shaped toothed ring 7 to make arc-shaped motion around the rotating shaft in the rotating shaft seat 31.

[0034] The servo motor 8 is fixedly mounted on the support frame 3, and the output shaft of the servo motor 8 is connected to the power arm 81. The end of the power arm 81 away from the servo motor 8 is hinged to the hinge shaft 82. The end of the hinge shaft 82 away from the power arm 81 is hinged to the end of the active swing arm 73 away from the arc-shaped toothed ring 7. The servo motor 8 is a permanent magnet synchronous servo motor with high-precision position control function. The rotation angle can be precisely controlled by pulse signals. The power arm 81 is hinged to the hinge shaft 82 through a pin shaft. The power of the servo motor 8 is transmitted to the active swing arm 73 through the hinge shaft 82.

[0035] The protective housing 4 has a first insulating gasket 41 on the side away from the arc-shaped toothed ring 7, corresponding to the switch. The protective housing 4 also has a side ear 42 fixedly installed to limit the deflection of the clamping arm 101, and the side ear 42 is symmetrically distributed on both sides of the protective housing 4. The first insulating gasket 41 has excellent insulation and high temperature resistance, which can ensure the insulation between the switch and the protective housing 4. The side ear 42 has a mounting hole for mounting the rotating shaft, and the inner wall of the hole is provided with a wear-resistant bushing to improve the stability of the clamping arm 101 when rotating.

[0036] The assembly assembly includes assembly sliders 9 symmetrically distributed on both sides of the first insulating gasket 41, and the assembly sliders 9 are slidably connected in corresponding grooves in the protective housing 4. Each assembly slider 9 has a second insulating gasket 91 corresponding to the switch at the end near the first insulating gasket 41, and a traction rod 92 hinged to the end away from the second insulating gasket 91. The side of the assembly slider 9 near the protective housing 4 is provided with a lubricating coating to reduce frictional resistance during sliding. The second insulating gaskets 91 are made of the same material as the first insulating gasket 41, which can provide insulation protection for the switch from both sides, avoiding direct contact between the switch and the assembly slider 9, further ensuring insulation performance, and thus effectively reducing the interference of external resistance on the data during the opening and closing of the switch.

[0037] The protective housing 4 also has a slide rod 43 corresponding to the first insulating gasket 41 fixedly installed inside. The slide rod 43 is slidably connected to a traction slip ring 44 along its axial direction. The traction slip ring 44 is also symmetrically distributed with a limiting link 441 that is hinged to the miniature cylinder 10. The slide rod 43 is coated with lubricating oil to ensure that the traction slip ring 44 slides smoothly. The limiting link 441 is hinged to the traction slip ring 44 through a pin and can adjust its angle as the traction slip ring 44 slides.

[0038] The assembly assembly also includes a miniature cylinder 10 for driving the assembly slider 9. The miniature cylinder 10 is connected to an external pump body through a pipeline. The clamping arm 101 is hinged to the piston rod in the miniature cylinder 10. Another set of clamping arms 101 is hinged to the other end of the miniature cylinder 10. The clamping arm 101 is also provided with an integrally formed limiting end 1011. The end of the limiting end 1011 away from the clamping arm 101 is hinged to the corresponding limiting link 441. The miniature cylinder 10 is a single-rod double-acting cylinder. When the cylinder of the miniature cylinder 10 extends or retracts, it will drive the corresponding clamping arm 101 to rotate around the side ear 42, and then drive the assembly slider 9 to slide through the traction rod 92 to realize the clamping and releasing of the gate.

[0039] The clamping arm 101 is also provided with a through hole 1012 corresponding to the side ear 42. The clamping arm 101 is rotatably connected to the corresponding side ear 42 through the through hole 1012. One end of the clamping arm 101 extending outside the protective housing 4 is hinged to the end of the traction rod 92 away from the assembly slider 9.

[0040] The impedance monitoring unit 5 is equipped with a 15KVA 1:1 isolation transformer for mains power isolation. The impedance monitoring unit 5 is also equipped with a solid-state relay for three-phase current switching. The 15KVA 1:1 isolation transformer provides mains power isolation, ensuring complete electrical insulation between the primary and secondary sides to protect personal safety and isolate dangerous voltages. The solid-state relay is used for three-phase current switching. The zero-crossing switching function of the solid-state relay can effectively control the setting to prevent arcing during current switching, thereby protecting the lifespan of the internal relays.

[0041] The impedance monitoring main body 5 is equipped with a meter holder current column for connecting to a voltmeter and an ammeter. The meter holder current column in the impedance monitoring main body 5 is also equipped with a corresponding temperature detection module. The temperature detection module can stop the current output when the temperature exceeds the threshold. At the same time, the device and the host computer are equipped with a heartbeat and timeout mechanism. When abnormal communication or loss of connection occurs, the device will automatically stop the output to prevent the device from overheating and other safety issues.

[0042] The circuit impedance simulation device of the present invention has the following usage procedure:

[0043] When using this invention to simulate the circuit impedance of a load cell, the switch in the load cell first needs to be assembled using the assembly components. After confirming a stable connection, the device is started. The servo motor 8 receives a control signal and outputs a stable speed through a high-precision position control function. Its output shaft drives the power arm 81 to rotate around the motor shaft. The power arm 81 pulls the active swing rod 73 through the hinge shaft 82, causing the active swing rod 73 to swing around the pivot in the pivot seat 31. At the same time, the driven connecting rod 72 cooperates with the movement of the active swing rod 73 to limit the movement trajectory of the arc-shaped toothed ring 7. The swing of the active swing rod 73 drives the arc-shaped toothed ring 7 to make an arc-shaped movement around the pivot seat 31. The arc-shaped toothed ring 7 meshes with the driven gear 6 through the teeth 71 to ensure stable movement without deviation. Since the protective housing 4 that carries the assembly components is fixed on the side of the arc-shaped toothed ring 7 away from the teeth 71, the protective housing 4 swings synchronously with the arc-shaped toothed ring 7, thereby realizing the opening and closing of the switch through purely mechanical components.

[0044] When assembling and fixing the switch, place the switch in the load box at the first insulating pad 41 of the protective housing 4, start the micro cylinder 10, and when it extends and retracts, it drives the clamping arm 101 with hinged ends to rotate around the side ear 42. When the clamping arm 101 rotates, the end of it extending outside the protective housing 4 pulls the assembly slider 9 through the traction rod 92, so that the assembly slider 9 slides along the slide groove of the protective housing 4. The side of the assembly slider 9 near the switch is provided with a second insulating pad 91. Finally, the switch is clamped by the relative sliding of the two assembly sliders 9. At the same time, the first insulating pad 41 and the second insulating pad 91 together achieve insulation protection to avoid external resistance interference with data.

[0045] After the switch is clamped, the impedance monitoring body 5 forms a circuit with the switch through a wire. The 15KVA 1:1 isolation transformer inside the impedance monitoring body 5 achieves mains power isolation, making the primary side and secondary side electrically isolated, protecting personal safety and avoiding mains power interference during testing. The solid-state relay achieves arc-free switching of three-phase current through zero-crossing switching function according to test requirements, protecting the life of internal components. The voltmeter and ammeter are connected to the current column of the meter holder of the impedance monitoring body 5 to collect voltage and current data in real time during the opening and closing of the switch, and then calculate the circuit impedance. The temperature detection module of the current column of the meter holder monitors the temperature in real time. When the temperature exceeds the threshold, the device automatically stops the current output. At the same time, the heartbeat and timeout mechanism between the device and the host computer can trigger automatic shutdown in case of communication abnormality to prevent the equipment from overheating or the fault from escalating.

[0046] The circuit impedance simulation device of the present invention has the following specific simulation process:

[0047] With single-phase power input, the load module unit selects different load modules to achieve the test conditions of actual load current. The phase selection unit switches phase A when the single-phase meter is running, and switches phase A to C sequentially when the three-phase meter is running to perform opening and closing tests, thereby achieving compatibility testing of single-phase / three-phase meters. At the same time, it is equipped with two voltmeters and one ammeter to measure the load status and the impedance status of the meter terminals. One voltmeter measures the line voltage, and the other voltmeter measures the voltage value when a current of 60A / 100A flows between the phase line input terminal and the phase line output terminal of the meter. Meanwhile, the ammeter measures the actual current flowing through the meter, thereby determining the actual power of the load and the internal impedance of the meter phase line input and output.

[0048] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Meanwhile, those skilled in the art should recognize that the above embodiments are only used to illustrate this application and are not intended to limit this application. Any changes or modifications to the above embodiments within the spirit and essence of this application will fall within the scope of the claims of this application.

Claims

1. A circuit impedance simulation device comprising a base (1), characterized in that: a support (2) is fixedly installed on the base (1), a bearing frame (3) is fixedly installed at the top end of the support (2), a closing mechanism for closing and opening operation is arranged on the bearing frame (3), the closing mechanism is composed of an assembly component for assembling a blade and an opening and closing component for driving the assembly component, an impedance monitoring main body (5) for monitoring blade opening and closing data is further arranged on the base (1), and the impedance monitoring main body (5) is connected with the blade electrical signal through a wire; the opening and closing component comprises a driven gear (6) rotatably connected at the top end of the bearing frame (3), a gear shaft of the driven gear (6) is rotatably connected on the bearing frame (3), a rotating shaft seat (31) is fixedly installed on the bearing frame (3), an arc-shaped avoiding groove is formed at one end of the rotating shaft seat (31) close to the driven gear (6), an arc-shaped tooth ring (7) driven by a servo motor (8) is further arranged on the rotating shaft of the rotating shaft seat (31), the arc-shaped tooth ring (7) is integrally formed with teeth (71) distributed along the contour thereof, the arc-shaped tooth ring (7) is meshed with the driven gear (6) through the teeth (71), and a protective shell (4) for bearing the assembly component is further fixedly installed on the side of the arc-shaped tooth ring (7) away from the teeth (71). both ends of the arc-shaped tooth ring (7) are respectively hingedly connected with a driven connecting rod (72) and a driving swing rod (73), one end of the driven connecting rod (72) away from the arc-shaped tooth ring (7) is hingedly connected with the rotating shaft of the rotating shaft seat (31), and the middle of the driving swing rod (73) is also hingedly connected with the rotating shaft of the rotating shaft seat (31).

2. A circuit impedance simulation device according to claim 1, wherein the servo motor (8) is fixedly installed on the bearing frame (3), a power arm (81) is drivingly connected with the output shaft of the servo motor (8), one end of the power arm (81) away from the servo motor (8) is hingedly connected with a hinged shaft (82), and one end of the hinged shaft (82) away from the power arm (81) is hingedly connected with one end of the driving swing rod (73) away from the arc-shaped tooth ring (7).

3. A circuit impedance simulation device according to claim 2, wherein a first insulating gasket (41) corresponding to the blade is arranged on the side of the protective shell (4) away from the arc-shaped tooth ring (7), side ears (42) for limiting the deflection of clamping arms (101) are further fixedly installed on the protective shell (4), and the side ears (42) are symmetrically distributed on both sides of the protective shell (4).

4. A circuit impedance simulation device according to claim 1, wherein the assembly component comprises assembly sliding blocks (9) symmetrically distributed on both sides of the first insulating gasket (41), the assembly sliding blocks (9) are slidingly connected in corresponding sliding grooves in the protective shell (4), second insulating gaskets (91) corresponding to the blade are arranged on one end of each of the assembly sliding blocks (9) close to the first insulating gasket (41), and a hingedly connected traction rod (92) is further arranged on one end of each of the assembly sliding blocks (9) away from the second insulating gasket (91).

5. The circuit impedance simulation apparatus of claim 1, wherein ​ 6. A circuit impedance simulation device according to claim 4, wherein The protective shell (4) is also fixedly provided with a slide rod (43) corresponding to the first insulating pad (41), the slide rod (43) is slidably connected with a traction sliding ring (44) along the axial direction, and the traction sliding ring (44) is also symmetrically provided with a limiting connecting rod (441) connected with the micro cylinder (10) in a hinged manner.

7. A circuit impedance simulation apparatus according to claim 4, wherein The assembly component further comprises a micro cylinder (10) for driving the assembly sliding block (9), the micro cylinder (10) is connected with an external pump body through a pipeline, one of the clamping arms (101) is connected with the micro cylinder (10) in a hinged manner, the other clamping arm (101) is connected with the other end of the micro cylinder (10) in a hinged manner, and the clamping arm (101) is further provided with an integral limiting end (1011), one end of the limiting end (1011) away from the clamping arm (101) is connected with the corresponding limiting connecting rod (441) in a hinged manner.

8. A circuit impedance simulation device according to claim 7, wherein The clamping arm (101) is further provided with a through hole (1012) corresponding to the side ear part (42), the clamping arm (101) is rotatably connected with the corresponding side ear part (42) through the through hole (1012), and one end of the clamping arm (101) extending out of the protective shell (4) is connected with one end of the traction rod (92) away from the assembly sliding block (9) in a hinged manner.

9. The circuit impedance simulation apparatus of claim 1, wherein The impedance monitoring main body (5) is provided with a 15KVA 1:1 isolation transformer for AC power isolation, and the impedance monitoring main body (5) is also provided with a solid-state relay for three-phase current switching.

10. A circuit impedance simulation device according to claim 7, wherein The impedance monitoring main body (5) is provided with a meter seat current column for being connected with a voltmeter and an ammeter, and the impedance monitoring main body (5) is further provided with a corresponding temperature detection module.

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