Static load test device and method for verifying stability of shunt capacitor unit

Abstract

The present application relates to the technical field of capacitor structure test, especially to a static load test device and method for verifying stability of parallel capacitor units, comprising a capacitor fixing structure, a loading structure and an angle adjusting structure; the capacitor fixing structure is connected to a measured capacitor for fixing the measured capacitor; the loading structure is connected to an angle steel of a fixed lifting lug on the measured capacitor for loading the angle steel; a force measuring device is arranged on the loading structure for measuring the force of the loading structure loaded on the angle steel; the angle adjusting structure comprises a capacitor angle adjusting unit or a loading direction adjusting unit; the capacitor angle adjusting unit is connected to the measured capacitor and the capacitor fixing structure for adjusting the inclination angle of the measured capacitor; the loading direction adjusting unit is connected to the loading structure for adjusting the loading angle of the loading structure. The device can effectively test the stability of the capacitor unit, solve the problem of poor reliability of the existing equipment hoisting test, and cannot meet the overall stress intensity detection of the capacitor.

Description

Technical Field

[0001] This invention relates to the field of capacitor structure testing technology, specifically to a static load test device and method for verifying the stability of parallel capacitor units. Background Technology

[0002] As a core component of modern energy systems, the safety of power equipment directly affects the stability and reliability of power grid operation. With the continuous growth of global energy demand, power equipment is developing towards higher voltage, larger capacity, and modularity. Capacitors, as key components for reactive power compensation, filtering, and energy storage, have expanded their applications from traditional power transmission and distribution to emerging fields such as renewable energy grid connection, electric vehicle charging stations, and data center power supply. The increasing size and higher parameters of power equipment pose stringent challenges to hoisting technology.

[0003] A capacitor unit is an assembly consisting of one or more capacitor elements housed in a single housing and equipped with leads. With the increasing size and higher parameters of power equipment, the weight of capacitor units has significantly increased. Capacitor lugs are raised structures on the capacitor housing used to connect and lift the container unit for precise installation. As a critical load-bearing component, the mechanical strength of the lugs directly affects equipment safety. Verifying the mechanical strength of the external structure of power equipment ensures that it can withstand external forces without deformation or damage during transportation, installation, operation, and maintenance, preventing damage to internal components or seal failure due to mechanical stress. Its importance is mainly reflected in the following two aspects: First, the lugs are the core load-bearing points during capacitor handling; insufficient strength may lead to breakage or detachment during lifting, causing equipment to fall. Second, during actual transportation and operation, dynamic impact tests can verify the impact resistance of the lugs and the stability of the capacitor unit.

[0004] Current methods typically employ equipment hoisting tests to verify the mechanical strength of lifting lugs. The core principle is to assess the structural integrity of the lugs under rated load by simulating hoisting conditions. This involves fixing the equipment and connecting the lugs with lifting equipment. The capacitor unit must undergo a "vertical tensile test," where the rated load is applied vertically. During the test, the force direction must be consistent with the design of the lifting lugs to avoid abnormal stress caused by lateral tension. However, this testing method only applies to individual capacitor units and lacks a device and method for hoisting tests on the entire capacitor. In some capacitor towers, one side of the capacitor unit is fixed to the capacitor platform, while the other side is connected and fixed to the capacitor lugs via angle steel. In situations such as earthquakes or strong winds, the swaying of the capacitor tower can cause the capacitor units on each floor to sway, resulting in relative displacement between the capacitor lugs and the fixing angle steel. This can damage internal components or cause seal failure, leading to equipment malfunction. Furthermore, existing equipment hoisting tests have a single force angle and cannot simulate the load the lugs can withstand when the capacitor unit sways, resulting in poor reliability of the test results. Summary of the Invention

[0005] To address the problem that existing technologies have poor reliability in equipment hoisting tests and cannot meet the requirements for testing the overall stress strength of capacitors, this invention provides a static load test device and method for verifying the stability of parallel capacitor units.

[0006] To achieve the above objectives, the present invention employs the following technical solution: This invention provides a static load test device for verifying the stability of a parallel capacitor unit, comprising a capacitor fixing structure, a loading structure, and an angle adjustment structure; The capacitor fixing structure is connected to the capacitor under test and is used to fix the capacitor under test. The loading structure is connected to the angle steel of the fixed lifting lug on the capacitor under test, and is used to load the angle steel; the loading structure is equipped with a force measuring device to measure the force applied to the angle steel by the loading structure. The angle adjustment structure includes a capacitor angle adjustment unit or a loading direction adjustment unit; the capacitor angle adjustment unit is connected to the capacitor under test and the capacitor fixing structure, and is used to adjust the tilt angle of the capacitor under test; the loading direction adjustment unit is connected to the loading structure, and is used to adjust the loading angle of the loading structure.

[0007] Optionally, the capacitor fixing structure includes a ground trench with a plurality of compression beams disposed on the ground trench. The compression beams press down on the capacitor under test to fix the capacitor under test.

[0008] Optionally, the capacitor fixing structure further includes a plurality of bolts, which can slide along the groove holes of the trench and are connected to the compression beam.

[0009] Optionally, the loading structure includes a loading rod and an electric hoist, the loading rod is connected to an angle steel, the electric hoist is connected to both sides of the loading rod, and the force measuring device is disposed at the loading end of the electric hoist.

[0010] Optionally, the electric hoist is detachably connected to the ground trough and can move along the groove of the ground trough.

[0011] Optionally, the loading direction adjustment unit includes a connecting rod connected to the motor of the electric hoist, the connecting rod being movable along the groove of the trench.

[0012] Optionally, the force measuring device is a force sensor.

[0013] Optionally, the capacitor angle adjustment unit includes several right-angled triangular supports with different angles. The face corresponding to the long side of the right-angled triangular support is fixedly connected to the capacitor being tested, and the face corresponding to the right-angled side at the bottom is connected to the capacitor fixing structure.

[0014] A static load test method for verifying the robustness of a parallel capacitor unit using the above-mentioned device includes: The force angle of the capacitor under test can be adjusted using the capacitor angle adjustment unit, or the loading angle of the loading structure can be adjusted using the loading direction adjustment unit. The capacitor under test is continuously loaded, and the force of the loading structure (angle steel) is measured using a force measuring device until the connection between the angle steel and the lifting lug is damaged or the lifting lug is damaged. The value measured by the force measuring device is recorded to complete the static load test verification of the stability of the parallel capacitor unit.

[0015] Optionally, during the continuous loading of the capacitor under test, a graded loading method is adopted, with an interval of 5 to 10 minutes between each loading stage; the loading increment of the next stage is 20% to 25% of the previous stage.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a static load testing device for verifying the stability of parallel capacitor units, comprising a capacitor fixing structure, a loading structure, and an angle adjustment structure. The capacitor fixing structure provides a stable and reliable testing foundation for the entire static load test, ensuring that the capacitor will not move unnecessarily due to external factors or loading during the test, thereby guaranteeing the accuracy and reliability of the test data and enabling the test results to truly reflect the stability of the capacitor under static load. The loading structure is directly connected to the angle steel fixing lugs on the capacitor under test, enabling precise application of load to the key parts of the capacitor under test, simulating the forces that may be borne in actual use. Simultaneously, a force measuring device is installed on the loading structure to measure the magnitude of the force applied to the angle steel in real time and accurately. The angle adjustment structure enables testing of capacitor stability at different tilt angles, reflecting the stability of the capacitor under different environments to the greatest extent, identifying weaknesses in the capacitor under different force directions, and providing targeted directions for product structural optimization and improvement. This static load testing device, through precise loading, comprehensive angle adjustment, and accurate force measurement, can conduct a comprehensive and in-depth test of the stability of parallel capacitor units. This helps to identify potential quality problems in a timely manner during product manufacturing, improve the overall quality and reliability of capacitors by improving design and processes, reduce the probability of product failure during use, lower maintenance costs and safety risks, and extend the service life of equipment.

[0017] The capacitor fixing structure includes a trench with several compression beams mounted on it. These beams press down on the capacitor under test, securing it in place. The trench provides a solid and stable foundation for the entire structure, forming a firm bond with the ground and effectively resisting external vibrations, impacts, and potential reaction forces during the test. This ensures that the entire fixing structure will not shake or shift during static load testing, providing a stable testing environment for the capacitor. The evenly distributed compression beams on the trench and pressing down on the capacitor distribute the pressure evenly across the trench and surrounding ground, ensuring uniform stress on the capacitor during fixing and preventing deformation or displacement due to uneven stress. This more accurately simulates the stress state of the capacitor in actual use, improving the reliability of the test results.

[0018] The capacitor fixing structure also includes several bolts that can slide along the slots in the trench and are connected to the compression beam. The ability of the bolts to slide along the slots allows the position of the compression beam to be flexibly and precisely adjusted according to the specific dimensions of the capacitor under test, the number and shape of the capacitor units, and the test requirements.

[0019] The loading structure includes a loading rod and an electric hoist. The loading rod is connected to an angle steel, and the electric hoist is connected to both sides of the loading rod. The force measuring device is located at the loading end of the electric hoist. The electric hoist can evenly apply the loading force to the loading rod, and then smoothly transmit it to the capacitor under test through the loading rod. This loading method can effectively avoid excessive local stress on the capacitor due to uneven loading, reduce the possibility of unexpected deformation or damage to the capacitor during the test, and ensure that the test can truly reflect the stability of the capacitor under uniform static load.

[0020] The loading direction adjustment unit includes a connecting rod connected to the motor of the electric hoist, which can move along the slot of the ground trench. The connecting rod allows adjustment of the loading direction of the electric hoist on the capacitor under test by adjusting its position, simulating various actual working conditions. The structure is simple, and the loading direction can be flexibly adjusted according to test requirements, meeting the needs of various complex tests.

[0021] The capacitor angle adjustment unit includes several right-angled triangular supports with different angles. The face corresponding to the longer side of each right-angled triangular support is fixedly connected to the capacitor under test, and the face corresponding to the right-angled side at the bottom is connected to the capacitor fixing structure. Equipped with several right-angled triangular supports with different angles, it provides a wide variety of angle adjustment options for the capacitor under test, allowing for quick and convenient adjustment to the required angle to meet diverse testing needs.

[0022] This invention provides a static load test method for verifying the stability of a parallel capacitor unit using the above-mentioned device. The method adjusts the force angle of the capacitor under test by adjusting the capacitor angle adjustment unit, or adjusts the loading angle of the loading structure by adjusting the loading direction adjustment unit. It can simulate various complex stress conditions that the parallel capacitor unit may encounter in actual operation, providing more comprehensive data support for the design and optimization of the capacitor. The method is simple and easy to operate.

[0023] During the continuous loading process of the capacitor under test, a graded loading method is adopted, with an interval of 5 to 10 minutes between each loading stage; the loading increment of the next stage is 20% to 25% of the previous stage. Graded loading with appropriate intervals allows the capacitor sufficient time to reach a relatively stable state after each loading stage, which helps to understand the experimental progress at each stage. The experiment has high repeatability and provides a more reliable scientific basis for capacitor maintenance and replacement. Attached Figure Description

[0024] Figure 1 This is an isometric view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 1 of the present invention.

[0025] Figure 2 This is a left view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 1 of the present invention.

[0026] Figure 3 This is a rear view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 1 of the present invention.

[0027] Figure 4 This is an isometric view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 2 of the present invention.

[0028] Figure 5 This is a left view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 2 of the present invention.

[0029] Figure 6 This is a rear view of a static load test device for verifying the stability of a parallel capacitor unit according to Embodiment 2 of the present invention.

[0030] Among them, 1-the capacitor under test, 2-the ground trench, 3-the compression beam, 4-the bolt, 5-the loading rod, 6-the electric hoist, 7-the force sensor, 8-the connecting rod, 9-the right-angled triangular bracket, 11-the angle steel, 12-the lifting lug. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present 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, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 the present invention according to the specific circumstances.

[0037] The present invention will be further described in detail below with reference to specific embodiments. These descriptions are for explanation purposes only and are not intended to limit the scope of the invention.

[0038] This invention discloses a static load test apparatus for verifying the robustness of parallel capacitor units, see [link to relevant documentation]. Figures 1 to 6 This includes capacitor fixing structure, loading structure and angle adjustment structure; The capacitor fixing structure is connected to the capacitor under test 1 and is used to fix the capacitor under test 1. The loading structure is connected to the angle steel 11 of the fixed lug 12 on the capacitor under test 1, and is used to load the angle steel 11; the loading structure is equipped with a force measuring device to measure the force loaded by the loading structure on the angle steel 11. The angle adjustment structure includes a capacitor angle adjustment unit or a loading direction adjustment unit; the capacitor angle adjustment unit is connected to the capacitor under test 1 and the capacitor fixing structure, and is used to adjust the tilt angle of the capacitor under test; the loading direction adjustment unit is connected to the loading structure, and is used to adjust the loading angle of the loading structure.

[0039] The capacitor fixing structure provides a stable and reliable test foundation for the entire static load test, ensuring that the tested capacitor 1 will not move unnecessarily due to external factors or loading during the test, thus guaranteeing the accuracy and reliability of the test data and enabling the test results to truly reflect the stability of the capacitor under static load. The loading structure is directly connected to the angle steel 11 of the fixed lifting lug 12 on the tested capacitor 1, which can accurately apply the load to the key parts of the tested capacitor 1, simulating the forces that may be borne in actual use. At the same time, force measuring devices are set on the loading structure, which can measure the magnitude of the force applied by the loading structure to the angle steel 11 in real time and accurately. The setting of the angle adjustment structure can test the stability of the capacitor under different tilt angles, and can reflect the stability of the capacitor under different environments to the greatest extent, discover the weak points of the tested capacitor 1 in different force directions, and provide targeted directions for product structural optimization and improvement. This static load testing device, through precise loading, comprehensive angle adjustment, and accurate force measurement, can conduct a comprehensive and in-depth test of the stability of parallel capacitor units. This helps to identify potential quality problems in a timely manner during product manufacturing, improve the overall quality and reliability of capacitors by improving design and processes, reduce the probability of product failure during use, lower maintenance costs and safety risks, and extend the service life of equipment.

[0040] Example 1 This invention discloses a static load test apparatus for verifying the robustness of parallel capacitor units, see [link to relevant documentation]. Figures 1 to 3 It includes a capacitor fixing structure, a loading structure, and a loading direction adjustment unit; The capacitor fixing structure connects to the capacitor under test 1 and is used to fix the capacitor under test 1. It includes a ground trench 2 and several bolts 4. Several compression beams 3 are provided on the ground trench 2. The compression beams 3 press on the capacitor under test 1. The bolts 4 can slide along the groove holes of the ground trench 2 and are connected to the compression beams 3 to fix the capacitor under test 1.

[0041] The loading structure is connected to the angle steel 11 of the fixed lug 12 on the capacitor under test 1, and is used to load the angle steel 11. A force measuring device is provided on the loading structure to measure the force applied to the angle steel 11. The loading structure includes a loading rod 5 and an electric hoist 6. The loading rod 5 is connected to the angle steel 11, and the electric hoist 6 is distributed on both sides of the loading rod 5. The electric hoist 6 is detachably connected to the trench 2 and can move along the slot of the trench 2. Optionally, the force measuring device is located at the loading end of the electric hoist 6. The loading direction adjustment unit includes a connecting rod 8 connected to the motor of the electric hoist 6. The connecting rod 8 is detachably connected to the trench 2 and can move along the slot of the trench 2. Optionally, the force measuring device is a force sensor 7.

[0042] During the static load test to verify the stability of the parallel capacitor unit, the capacitor 1 under test is fixed by the coordinated operation of the trench 2, bolts 4, and compression beam 3. Then, the electric hoist 6 is moved along the trench 2 by adjusting the position of the connecting rod 8 to change the direction of the loading force and apply the load. The loading process consists of two steps: Step 1: Increase the tension from 0 to the load level to be verified.

[0043] Step 2: Continue applying the load until the component is damaged.

[0044] Based on the loading conditions, step 1 uses a graded loading method, divided into five levels, with each level increasing the load by 20%. If the unit is not damaged, step 2 loading is performed, with each level increasing by 1 kN until the unit is damaged. The interval between each graded loading is 5–10 minutes, used to observe the damage to the tested capacitor 1.

[0045] Step 2 involves changing the position of the electric hoist 6 to alter the angle of the applied load. The applied load angle utilizes a graded loading system, divided into five levels, with each level loading 20%. Each graded loading interval is 5–10 minutes, used to observe damage to the capacitor unit. After unloading, the following checks are performed: whether the lifting lug 12 is deformed, cracked, or detached; whether the outer casing weld is cracked; and whether the sealing of the tested capacitor 1 is damaged (e.g., oil leakage, gas leakage, etc.).

[0046] Example 2 This invention discloses a static load test apparatus for verifying the robustness of parallel capacitor units, see [link to relevant documentation]. Figures 4 to 6 It includes a capacitor fixing structure, a loading structure, and a capacitor angle adjustment unit; The capacitor fixing structure connects to the capacitor under test 1 and is used to fix the capacitor under test 1. It includes a ground trench 2 and several bolts 4. Several compression beams 3 are provided on the ground trench 2. The compression beams 3 press on the capacitor under test 1. The bolts 4 can slide along the groove holes of the ground trench 2 and are connected to the compression beams 3 to fix the capacitor under test 1.

[0047] The loading structure is connected to the angle steel 11 of the fixed lug 12 on the capacitor under test 1, and is used to load the angle steel 11; the loading structure is provided with a force measuring device for measuring the force loaded by the loading structure on the angle steel 11; the loading structure includes a loading rod 5 and an electric hoist 6, and the loading rod 5 is connected to the angle steel 11; optionally, the force measuring device is set at the loading end of the electric hoist 6, and the force measuring device is a force sensor 7.

[0048] The capacitor angle adjustment unit consists of several right-angled triangular supports 9 with different angles. The face corresponding to the long side of the right-angled triangular support 9 is fixedly connected to the capacitor 1 being tested, and the face corresponding to the right-angled side at the bottom is connected to the capacitor fixing structure.

[0049] During the static load test to verify the stability of the parallel capacitor unit, the right-angled triangular bracket 9 is fixed by the coordinated cooperation of the ground trench 2, bolts 4, and compression beam 3. Then, the capacitor under test 1 is fixed on the surface corresponding to the long side of the right-angled triangular bracket 9. The force angle of the capacitor under test 1 can be changed by replacing the right-angled triangular bracket 9 with different angles. The load is applied to ensure that the chain of the electric hoist 6 is set horizontally. The loading process is divided into two steps: Step 1: Increase the tension from 0 to the load level to be verified.

[0050] Step 2: Continue applying the load until the component is damaged.

[0051] Based on the loading conditions, step 1 uses a graded loading method, divided into five levels, with each level increasing the load by 20%. If the unit is not damaged, step 2 loading is performed, with each level increasing by 1 kN until the unit is damaged. The interval between each graded loading is 5–10 minutes, used to observe the damage to the tested capacitor 1.

[0052] After unloading, check: whether the lifting lug 12 is deformed, cracked or detached, whether the outer shell weld is cracked, and whether the sealing of the tested capacitor 1 is damaged (such as oil leakage, gas leakage, etc.).

[0053] The present invention also provides a static load test method for verifying the stability of a parallel capacitor unit using the above-mentioned device, comprising: The capacitor to be tested, 1, is fixed using a capacitor fixing structure; The angle of the capacitor under test 1 is adjusted by adjusting the angle adjustment structure or the loading angle of the loading structure to continuously load the capacitor under test 1. Simultaneously, a force measuring device is used to measure the force applied by the loading structure to the angle steel 11 until damage occurs at the connection between the angle steel 11 and the lifting lug 12, or the lifting lug itself. The values ​​measured by the force measuring device are recorded, thus completing the static load test verification of the stability of the parallel capacitor unit. Optionally, during the continuous loading of the capacitor under test 1, a staged loading method is adopted, with an interval of 5–10 minutes between each stage; the increment of the next stage of loading is 20%–25% of the previous stage.

[0054] This method adjusts the force angle of the capacitor under test by adjusting the capacitor angle adjustment unit, or adjusts the loading angle of the loading structure by adjusting the loading direction adjustment unit. It can simulate various complex force conditions that parallel capacitor units may encounter in actual operation, providing more comprehensive data support for capacitor design and optimization. The method is simple and easy to operate.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the technical solution of the present invention in any way. Those skilled in the art should understand that, without departing from the spirit and principles of the present invention, the technical solution can be modified and replaced in several simple ways, and these modifications and replacements are all within the scope of protection covered by the claims.

Claims

1. A static load test device for verifying the stability of a parallel capacitor unit, characterized in that, This includes capacitor fixing structure, loading structure, and angle adjustment structure; The capacitor fixing structure is connected to the capacitor under test and is used to fix the capacitor under test. The loading structure is connected to the angle steel of the fixed lifting lug on the capacitor under test, and is used to load the angle steel; the loading structure is equipped with a force measuring device to measure the force applied to the angle steel by the loading structure. The angle adjustment structure includes a capacitor angle adjustment unit or a loading direction adjustment unit; the capacitor angle adjustment unit is connected to the capacitor under test and the capacitor fixing structure, and is used to adjust the tilt angle of the capacitor under test; the loading direction adjustment unit is connected to the loading structure, and is used to adjust the loading angle of the loading structure.

2. The static load test device for verifying the stability of parallel capacitor units according to claim 1, characterized in that, The capacitor fixing structure includes a ground trench with several compression beams installed on it. The compression beams press down on the capacitor under test to fix the capacitor under test.

3. The static load test device for verifying the stability of parallel capacitor units according to claim 2, characterized in that, The capacitor fixing structure also includes a number of bolts, which can slide along the groove holes of the trench and are connected to the compression beam.

4. The static load test device for verifying the stability of parallel capacitor units according to claim 1, characterized in that, The loading structure includes a loading rod and an electric hoist. The loading rod is connected to an angle steel, and the electric hoist is connected to both sides of the loading rod. The force measuring device is set at the loading end of the electric hoist.

5. The static load test device for verifying the stability of parallel capacitor units according to claim 4, characterized in that, The electric hoist is detachably connected to the ground trough and can move along the groove of the ground trough.

6. The static load test apparatus for verifying the stability of parallel capacitor units according to claim 4, characterized in that, The loading direction adjustment unit includes a connecting rod connected to the motor of the electric hoist, and the connecting rod can move along the groove of the ground trench.

7. The static load test apparatus for verifying the stability of parallel capacitor units according to claim 1, characterized in that, The force measuring device is a force sensor.

8. The static load test apparatus for verifying the stability of parallel capacitor units according to claim 1, characterized in that, The capacitor angle adjustment unit includes several right-angled triangular supports with different angles. The face corresponding to the long side of the right-angled triangular support is fixedly connected to the capacitor being tested, and the face corresponding to the right-angled side at the bottom is connected to the capacitor fixing structure.

9. A static load test method for verifying the robustness of a parallel capacitor unit using the apparatus described in any one of claims 1-8, characterized in that, include: The force angle of the capacitor under test can be adjusted using the capacitor angle adjustment unit, or the loading angle of the loading structure can be adjusted using the loading direction adjustment unit. The capacitor under test is continuously loaded, and the force of the loading structure, which is an angle steel, is measured using a force measuring device until the connection between the angle steel and the lifting lug is damaged or the lifting lug is damaged. The value measured by the force measuring device is recorded to complete the static load test verification of the stability of the parallel capacitor unit.

10. The static load test method for verifying the stability of a parallel capacitor unit according to claim 9, characterized in that, During the continuous loading of the capacitor under test, a graded loading method is adopted, with an interval of 5 to 10 minutes between each loading stage; the loading increment of the next stage is 20% to 25% of the previous stage.

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