Long-term live-line test loop and method under high-fall GIL seismic condition

Abstract

The invention discloses a long-term live-line test loop and method under a high-fall GIL earthquake condition. The loop comprises a rigid gas insulated transmission line, a vibration table, a support frame, a wire inlet sleeve and a test system. One side, perpendicular to the ground, in the concave area under the ground is set as a reaction wall; a vibration table is arranged on the reaction wall; a supporting frame is installed above the ground of the concave area, the rigid gas insulation power transmission line is perpendicular to the ground and installed on the supporting frame, and the rigid gas insulation power transmission line is fixed through a vibration table; the top of the rigid gas insulated transmission line is connected with the wire inlet sleeve; the test system is installed on the ground and is connected with the wire inlet sleeve through a line. The reaction wall and the vibration table are arranged underground, and the ground is used as the reaction wall, so that resonance of the reaction wall is prevented when seismic waves are applied. The layout perfectly reproduces the actual operation condition of the high-fall rigid gas insulated transmission line, and can effectively test the real performance of the high-fall rigid gas insulated transmission line under the earthquake condition.

Description

Technical Field

[0001] This application relates to the field of power engineering technology, and in particular to a long-term energized test circuit and method under high-drop GIL earthquake conditions. Background Technology

[0002] With the continuous development and increasing complexity of power systems, rigid gas-insulated transmission lines (GILs) are widely used in high-voltage power transmission. To ensure the safety and reliability of these devices in actual operation, they must be tested under long-term energized operation and seismic conditions to simulate extreme situations in real environments and ensure stable operation under catastrophic events such as sudden earthquakes, thus guaranteeing the safety of power supply.

[0003] Currently, existing long-term live-line testing platforms are mainly suitable for low-height, small-sized high-voltage electrical products. These platforms cannot simulate the complex seismic conditions that high-drop GILs may encounter in actual operation. Existing seismic test platforms are typically only used for small equipment and often employ reaction walls built above ground for vibration application. However, the vibration frequency of reaction walls is limited, failing to fully simulate the effects of high-frequency seismic waves and resulting in energy loss. Furthermore, as the equipment height increases, the volume of the reaction wall needs to increase exponentially, making it difficult to reproduce the actual operating conditions of high-drop GILs. Therefore, it is impossible to effectively test the true performance of high-drop GILs under seismic conditions. Summary of the Invention

[0004] This application provides a long-term energized test circuit and method for high-drop GILs under seismic conditions, with the aim of effectively testing the real performance of high-drop GILs under seismic conditions.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A long-term energized test circuit under high-drop GIL earthquake conditions, the long-term energized test circuit comprising: a rigid gas-insulated transmission line, a vibration table, a support frame, an incoming bushing, and a test system;

[0007] A concave area is provided below the ground, and within the concave area, the side perpendicular to the ground is set as a reaction wall;

[0008] The vibration table is installed on the reaction wall; the vibration table is used to generate vibration waves.

[0009] The support frame is installed above the ground in the concave area, and the rigid gas-insulated transmission line is installed perpendicular to the ground on the support frame and fixed by the vibration table.

[0010] The top of the rigid gas-insulated transmission line is connected to the incoming bushing;

[0011] The test system is installed on the ground and connected to the incoming bushing via a line; the test system is used to apply voltage and current to the rigid gas-insulated transmission line.

[0012] Optionally, the test system includes a voltage test system and a current test system;

[0013] The voltage testing system and the current testing system are respectively installed on the ground; the voltage testing system is used to apply voltage to the rigid gas-insulated transmission line; the current testing system is used to apply current to the rigid gas-insulated transmission line.

[0014] The current testing system is connected to the first inlet bushing via the first current inlet line, and the current testing system is connected to the second inlet bushing via the second current inlet line;

[0015] The voltage testing system is connected to the second incoming bushing via a voltage input line.

[0016] Optionally, the current testing system is mounted on the ground via an insulating bracket, which is used to isolate the current testing system from the ground.

[0017] Optionally, the current testing system consists of an isolation transformer, a current booster, and a voltage regulator.

[0018] Optionally, the voltage test system consists of a voltage regulator, front and rear switchgear, cables, transformers, protective resistors, and voltage dividers.

[0019] Optionally, the rigid gas-insulated transmission line is composed of multiple minimum units spliced ​​together, and the total length of the spliced ​​line is an integer multiple of the length of the minimum unit.

[0020] Optionally, the inlet bushing is specifically a composite bushing or a porcelain bushing.

[0021] A method for long-term energized testing under high-drop GIL earthquake conditions, applied to the aforementioned long-term energized testing circuit under high-drop GIL earthquake conditions, includes:

[0022] The voltage test system in the test system applies voltage to the rigid gas-insulated transmission line within a first preset time.

[0023] During the voltage application, a vibration wave is applied to the rigid gas-insulated transmission line using a vibration table;

[0024] After the voltage is applied, the rigid gas-insulated transmission line is subjected to status detection.

[0025] After the rigid gas-insulated transmission line passes the condition detection, the voltage test system applies voltage to the rigid gas-insulated transmission line within a second preset time, and the current test system in the test system applies current to the rigid gas-insulated transmission line within the second preset time; wherein, the first preset time and the second preset time can be the same time.

[0026] During the application of voltage and current, vibration waves are applied to the rigid gas-insulated transmission line via the vibration table;

[0027] After the voltage and current are applied, the rigid gas-insulated transmission line is subjected to condition detection, and the detection results are obtained.

[0028] Optionally, before the voltage test system in the test system applies voltage to the rigid gas-insulated transmission line within a preset time, it further includes:

[0029] Condition checks are performed on rigid gas-insulated transmission lines;

[0030] When the rigid gas-insulated transmission line passes inspection, the voltage test system in the pass test system applies voltage to the rigid gas-insulated transmission line within a preset time.

[0031] Optional, also includes:

[0032] If the voltage is interrupted during the voltage application period, the rigid gas-insulated transmission line shall be retested within the first preset time period, or the rigid gas-insulated transmission line shall be subjected to extended testing according to the interruption time.

[0033] When the voltage or current is interrupted during the application of voltage and current, the rigid gas-insulated transmission line is retested within the second preset time period, or the rigid gas-insulated transmission line is subjected to extended testing according to the interruption time.

[0034] The technical solution provided in this application sets up a reaction wall on one side perpendicular to the ground within a concave region below the ground. A shaking table is installed on the reaction wall. A support frame is installed above the ground in the concave region, and a rigid gas-insulated transmission line is installed perpendicular to the ground on the support frame and fixed to the rigid gas-insulated transmission line by the shaking table. The top of the rigid gas-insulated transmission line is connected to the incoming bushing. The test system is installed on the ground and connected to the incoming bushing via a line. The reaction wall and shaking table are arranged below the ground, using the earth as the reaction wall, preventing resonance of the reaction wall itself when seismic waves are applied. This layout perfectly replicates the actual operating conditions of a high-drop rigid gas-insulated transmission line and can effectively test its true performance under seismic conditions. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the architecture of a long-term energized test circuit under high-drop GIL earthquake conditions provided in this application embodiment;

[0037] Figure 2 A front view of a long-term energized test circuit under high-drop GIL earthquake conditions provided in an embodiment of this application;

[0038] Figure 3 A side view of a long-term energized test circuit under high-drop GIL earthquake conditions provided in an embodiment of this application;

[0039] Figure 4 A flowchart illustrating a long-term charged test method under high-drop GIL earthquake conditions is provided for embodiments of this application.

[0040] Figure 5 A flowchart of another long-term charged test method under high-drop GIL earthquake conditions provided in this application embodiment.

[0041] Figure label:

[0042] 11- Rigid gas-insulated transmission line; 12- Vibration table; 13- Support frame; 14- Incoming bushing; 15- Test system; 16- Reaction wall; 21- Voltage test system; 22- Current test system; 23- First incoming bushing; 24- Second incoming bushing; 25- Insulation support. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] like Figure 1 The diagram shown is a schematic of the architecture of a long-term live-line test circuit under high-drop GIL earthquake conditions provided in an embodiment of this application. The long-term live-line test circuit includes: a rigid gas-insulated transmission line 11 (GIL), a vibration table 12, a support frame 13, an inlet bushing 14, and a test system 15.

[0046] A concave area is set below the ground, and within the concave area, the side perpendicular to the ground is set as a reaction wall 16.

[0047] Specifically, the side perpendicular to the ground is treated accordingly, and then used as a reaction wall.

[0048] A vibration table 12 is installed on the reaction wall 16.

[0049] The vibration table 12 is used to generate vibration waves.

[0050] Specifically, the shaking table 12 can output different seismic waveforms (i.e., vibration waves) according to the input parameters, and can also control the output time of the seismic waveforms.

[0051] Understandably, vibration tables are used to simulate multi-degree-of-freedom, high-frequency vibration environments. After inputting specified waveform parameters (such as acceleration and time in the x-direction and acceleration and time in the y-direction) into the user interface, the vibration table will generate the corresponding vibration waves according to the input parameters.

[0052] It should be noted that the reaction wall 16 is used to arrange the shaking table 12. Relying on the ground for support, it avoids the problem of excessively low resonance frequency that may be caused by buildings above ground, thereby preventing the reaction wall 16 from resonating during the test and preventing the loss of seismic wave energy.

[0053] A support frame 13 is installed above the ground in the concave area. The rigid gas-insulated transmission line 11 is installed perpendicular to the ground on the support frame 13 and is fixed by a vibration table 12.

[0054] Optionally, the rigid gas-insulated transmission line 11 is a high-drop rigid gas-insulated transmission line 11, that is, a rigid gas-insulated transmission line 11 used in terrain with large elevation differences or vertical height differences.

[0055] It should be noted that the support frame 13 is used to fix the rigid gas-insulated transmission line 11 and bear the main weight of the rigid gas-insulated transmission line 11, while also allowing the rigid gas-insulated transmission line 11 to move in the horizontal direction.

[0056] Specifically, the rigid gas-insulated transmission line 11 is composed of multiple smallest units spliced ​​together, and the total length of the splice is an integer multiple of the length of the smallest unit.

[0057] It should be noted that the smallest unit is also a rigid gas-insulated transmission line 11.

[0058] Understandably, the rigid gas-insulated transmission line 11 is a metal-enclosed line, whose internal insulating medium is a gas different from air at atmospheric pressure, and its outer shell is grounded. This line consists of minimum units (e.g., 5 meters), and longer lines can be formed by assembling multiple minimum units. In testing, integer multiples of the minimum units (e.g., 3 times) are typically selected for testing to evaluate the connection performance between the units.

[0059] The top of the rigid gas-insulated transmission line 11 is connected to the incoming bushing 14.

[0060] Specifically, the incoming bushing 14 is either a composite bushing or a porcelain bushing.

[0061] The test system 15 is installed on the ground and connected to the incoming bushing 14 via a line.

[0062] The test system 15 is used to apply voltage and current to the rigid gas-insulated transmission line 11.

[0063] It is understandable that the incoming bushing 14 receives voltage through the voltage input line and current through the current input line, continuously applying voltage and current to the rigid gas-insulated transmission line 11.

[0064] Combination Figure 1 See the content shown. Figure 2 and Figure 3 The test system 15 includes a voltage test system 21 and a current test system 22.

[0065] It should be noted that, Figure 2 This is a front view of a long-term energized test circuit under high-drop GIL earthquake conditions. Figure 3 This is a side view of a long-term energized test circuit under high-drop GIL earthquake conditions.

[0066] The voltage test system 21 and the current test system 22 are respectively set on the ground.

[0067] The voltage test system 21 is used to apply voltage (e.g., DC voltage or AC voltage) to the rigid gas-insulated transmission line 11; the current test system 22 is used to apply current (e.g., DC current or AC current) to the rigid gas-insulated transmission line 11.

[0068] Specifically, the current testing system 22 is mounted on the ground via an insulating bracket 25, which is used to isolate the current testing system 22 from the ground.

[0069] Optionally, the voltage test system 21 consists of a voltage regulator, front and rear switchgear, cables, transformers, protective resistors, and voltage dividers.

[0070] Understandably, the voltage of the input transformer (e.g., 0 to 10 kV) can be adjusted by a voltage regulator, and then the transformer converts the input voltage to a higher level of voltage (e.g., 0 to 1000 kV) according to the turns ratio (e.g., 100).

[0071] In addition, the voltage can be adjusted by using resonant boost.

[0072] Optionally, the current test system 22 consists of an isolation transformer, a current booster, and a voltage regulator.

[0073] It should be noted that, since the rigid gas-insulated transmission line 11 has extremely low resistance, a large current (such as 10kA) can be generated by applying a small voltage (such as 10V) across the rigid gas-insulated transmission line 11.

[0074] The current testing system 22 is connected to the first inlet bushing 23 via the first current inlet line, and the current testing system 22 is connected to the second inlet bushing 24 via the second current inlet line.

[0075] Understandably, the current test system 22 provides the required long-term current through the current input line, and together with the current test system 22, the first current input line, the input bushing 14 and the rigid gas-insulated transmission line 11, a current loop is formed to transmit the current generated by the current test system 22.

[0076] The voltage test system 21 is connected to the second incoming bushing 24 via the voltage input line.

[0077] Understandably, the voltage test system 21 provides the long-term voltage required during the test through the voltage input line.

[0078] In summary, by arranging the reaction wall and shaking table below ground level, using the earth as the reaction wall, the problem of excessively low resonant frequencies that might occur when constructing a reaction wall upwards is avoided, thus preventing the reaction wall itself from resonating under seismic waves. This layout perfectly replicates the actual operating conditions of high-drop rigid gas-insulated transmission lines, effectively testing their true performance under seismic conditions. Furthermore, the voltage and current testing systems can be applied from the ground without needing to be raised. In addition, by using a support frame to bear the main weight of the high-drop rigid gas-insulated transmission line, the load-bearing capacity requirements of the shaking table itself are reduced.

[0079] like Figure 4 The diagram shows a flowchart of a long-term energized test method under high-drop GIL earthquake conditions provided in this application embodiment. Applied to the aforementioned long-term energized test circuit under high-drop GIL earthquake conditions, it includes the following steps:

[0080] S401: Apply voltage to the rigid gas-insulated transmission line within a first preset time using the voltage test system in the test system.

[0081] Understandably, when there is no load (i.e., zero load), the equipment is in a cold state (a state with a low temperature), and the voltage test system in the test system applies a multiple of the rated power frequency phase voltage (i.e., several times the standard voltage when the equipment is working normally) to the rigid gas-insulated transmission line.

[0082] S402: During voltage application, a vibration wave is applied to a rigid gas-insulated transmission line by means of a vibration table.

[0083] In real-world environments, rigid gas-insulated transmission lines not only need to withstand voltage but may also be affected by external vibrations (such as earthquakes, wind, or other vibration sources). By adding vibration waves during voltage application, the working environment of rigid gas-insulated transmission lines under actual conditions can be simulated more realistically.

[0084] S403: After the voltage is applied, perform condition detection on the rigid gas-insulated transmission line.

[0085] Specifically, the rigid gas-insulated transmission lines undergo visual inspection, gas tightness test, micro-water test, main circuit resistance measurement, power frequency and partial discharge measurement, and detection of natural frequency, damping ratio and transfer function curve.

[0086] S404: After the rigid gas-insulated transmission line passes the condition detection, the voltage test system applies voltage to the rigid gas-insulated transmission line within a second preset time, and the current test system in the test system applies current to the rigid gas-insulated transmission line within a second preset time.

[0087] The first preset time and the second preset time can be the same time (e.g., 30 days) or different times, depending on the actual situation.

[0088] Understandably, when a rigid gas-insulated transmission line has reached its operating temperature (i.e., hot state), a voltage test system applies a multiple of the rated power frequency voltage to the rigid gas-insulated transmission line, and a current test system within the test system applies the rated current (i.e., several times the standard voltage and standard current when the equipment is operating normally) to the rigid gas-insulated transmission line. This test is typically used to verify whether the electrical performance, insulation capacity, thermal stability, and durability of the equipment meet the requirements after long-term operation, ensuring that the equipment can operate stably and safely under high temperature and high load conditions.

[0089] S405: During the application of voltage and current, a vibration wave is applied to a rigid gas-insulated transmission line via a vibration table.

[0090] S406: After the voltage and current are applied, the condition of the rigid gas-insulated transmission line is checked, and the test results are obtained.

[0091] The test results include the pass status test and the fail status test for rigid gas-insulated transmission lines.

[0092] For specific implementation methods of condition detection for rigid gas-insulated transmission lines, please refer to step S403, which will not be repeated here.

[0093] It should be emphasized that during the live-line test, the vibration wave is a seismic wave that conforms to the specified response spectrum.

[0094] Optionally, if the voltage or current is interrupted during the application of voltage and current, the test cycle needs to be extended or the test needs to be repeated in order to verify the accuracy of the test. Therefore, in another embodiment of this application, a retesting method for a long-term energized test under high-drop GIL earthquake conditions is provided, including process A1 to process A2.

[0095] A1: When the voltage is interrupted during the voltage application period, the rigid gas-insulated transmission line shall be retested within a first preset time, or the rigid gas-insulated transmission line shall be tested for an extended period of time according to the interruption time.

[0096] Specifically, the rigid gas-insulated transmission line is retested within a first preset time period, which means re-executing steps S401 to S403.

[0097] In addition, the first preset time can be extended based on the interruption time. That is, the first test time is obtained by adding the interruption time and the extension time to the first preset time, and the test on the rigid gas-insulated transmission line can continue based on the first test time.

[0098] A2: When the voltage or current is interrupted during the application of voltage and current, the rigid gas-insulated transmission line shall be retested within a second preset time, or the rigid gas-insulated transmission line shall be tested for an extended period of time according to the interruption time.

[0099] Specifically, the rigid gas-insulated transmission line is retested within a second preset time period, which means re-executing steps S404 to S406.

[0100] In addition, the second preset time can be extended based on the interruption time. That is, the interruption time and the extension time are added to the second preset time to obtain the second test time, and the test on the rigid gas-insulated transmission line can continue based on the second test time.

[0101] In summary, by applying voltage and current to rigid gas-insulated transmission lines using voltage and current testing systems, and simultaneously introducing vibration waves, the seismic resistance of the transmission lines under earthquake conditions can be tested. This simulation test allows for the evaluation of the equipment's emergency response capabilities in the event of sudden incidents such as earthquakes.

[0102] like Figure 5 The flowchart shown is another method for long-term charged testing under high-drop GIL earthquake conditions provided in this application embodiment, including the following steps:

[0103] S501: Perform condition checks on rigid gas-insulated transmission lines.

[0104] Specifically, the rigid gas-insulated transmission lines undergo visual inspection, gas tightness test, micro-water test, main circuit resistance measurement, power frequency and partial discharge measurement, and detection of natural frequency, damping ratio and transfer function curve.

[0105] S502: When a rigid gas-insulated transmission line passes inspection, a voltage is applied to the rigid gas-insulated transmission line through the voltage test system in the test system within a first preset time.

[0106] It should be noted that the specific implementation of step S502 can be referred to step S401 accordingly, and will not be repeated here.

[0107] S503: During voltage application, a vibration wave is applied to a rigid gas-insulated transmission line by means of a vibration table.

[0108] It should be noted that the specific implementation of step S503 can be referred to step S402 accordingly, and will not be repeated here.

[0109] S504: After the voltage is applied, perform condition monitoring on the rigid gas-insulated transmission line.

[0110] It should be noted that the specific implementation of step S504 can be referred to step S403 accordingly, and will not be repeated here.

[0111] S505: After the rigid gas-insulated transmission line passes the condition detection, the voltage test system applies voltage to the rigid gas-insulated transmission line within a second preset time, and the current test system in the test system applies current to the rigid gas-insulated transmission line within a second preset time.

[0112] The first preset time and the second preset time can be the same time.

[0113] It should be noted that the specific implementation of step S505 can be referred to step S404 accordingly, and will not be repeated here.

[0114] S506: During the application of voltage and current, a vibration wave is applied to a rigid gas-insulated transmission line via a vibration table.

[0115] It should be noted that the specific implementation of step S506 can be referred to step S405 accordingly, and will not be repeated here.

[0116] S507: After the voltage and current are applied, the condition of the rigid gas-insulated transmission line is checked and the test results are obtained.

[0117] It should be noted that the specific implementation of step S507 can be referred to step S406 accordingly, and will not be repeated here.

[0118] In summary, a condition check should be performed before applying voltage and current to ensure that the transmission line is free from obvious mechanical damage, aging, corrosion, or other potential problems. This helps to avoid accidental damage or accidents caused by equipment failure during testing.

[0119] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. In particular, for system or system embodiments, since they are fundamentally similar to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. Components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0120] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0121] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, such as adjusting the position of the vibration table to the ground support frame, or using counterweights to simulate the self-weight of a high-drop rigid gas-insulated transmission line. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A long-term live-line test circuit under high-drop GIL seismic conditions, characterized in that, The long-term electrification test loop comprises a rigid gas insulated transmission line, a vibration table, a support frame, an incoming line sleeve and a test system; A concave area is arranged below the ground, and a side perpendicular to the ground in the concave area is arranged as a counterforce wall; The counterforce wall is provided with the vibration table, and the vibration table is used for generating vibration waves; The support frame is installed above the ground in the concave area, the rigid gas insulated transmission line is installed on the support frame perpendicularly to the ground, and the rigid gas insulated transmission line is fixed by the vibration table; The top of the rigid gas insulated transmission line is connected with the incoming line sleeve; The test system is installed on the ground and connected with the incoming line sleeve through a line, and the test system is used for applying voltage and current to the rigid gas insulated transmission line.

2. The long-term charged test circuit according to claim 1, characterized in that, The test system comprises a voltage test system and a current test system; The voltage test system and the current test system are arranged on the ground respectively, the voltage test system is used for applying voltage to the rigid gas insulated transmission line, and the current test system is used for applying current to the rigid gas insulated transmission line; The current test system is connected with a first incoming line sleeve through a first current incoming line, and the current test system is connected with a second incoming line sleeve through a second current incoming line; The voltage test system is connected with the second incoming line sleeve through a voltage incoming line.

3. The long-term charged test circuit according to claim 2, characterized in that, The current test system is installed on the ground through an insulating support, and the insulating support is used for isolating the current test system from the ground.

4. The long-term charged test circuit of claim 2, wherein, The current test system is composed of an isolation transformer, a current riser and a voltage regulator.

5. The long-term charged test circuit of claim 2, wherein, The voltage test system is composed of a voltage regulator, front and rear switch cabinets, a cable, a transformer, a protective resistor and a voltage divider.

6. The long-term charged test circuit of claim 1, wherein, The rigid gas insulated transmission line is spliced by a plurality of minimum units, and the total length of the splicing is an integer multiple of the length of the minimum unit.

7. The long-term charged test circuit of claim 1, wherein, The incoming line sleeve is specifically a composite sleeve or a porcelain sleeve.

8. A long-term live-line test method for high-drop GIL under seismic conditions, characterized in that, The long-term electrification test loop applied to the high-drop GIL under the seismic condition in any one of the above claims 1 to 7 comprises: The voltage test system in the test system applies voltage to the rigid gas insulated transmission line within a first preset time; During the voltage application, the vibration table applies vibration waves to the rigid gas insulated transmission line; After the voltage application is completed, the state of the rigid gas insulated transmission line is detected; After the rigid gas insulated transmission line passes the state detection, the voltage test system applies voltage to the rigid gas insulated transmission line within a second preset time, and the current test system in the test system applies current to the rigid gas insulated transmission line within the second preset time; wherein the first preset time and the second preset time can be the same time; During the voltage and current application, the vibration table applies vibration waves to the rigid gas insulated transmission line; After the voltage and current application are completed, the state of the rigid gas insulated transmission line is detected to obtain a detection result.

9. The long-term charge test method according to claim 8, characterized in that, The voltage test system in the passing test system applies voltage to the rigid gas insulated transmission line for a preset time before the rigid gas insulated transmission line is applied with voltage. The rigid gas insulated transmission line is subjected to state inspection. When the rigid gas insulated transmission line passes the inspection, the voltage test system in the passing test system applies voltage to the rigid gas insulated transmission line for a preset time.

10. The long-term charge test method according to claim 8, characterized by, Further comprising: When the voltage is interrupted during the voltage application, the rigid gas insulated transmission line is retested for the first preset time, or is subjected to extended test according to the interruption time. When the voltage or the current is interrupted during the voltage and current application, the rigid gas insulated transmission line is retested for the second preset time, or is subjected to extended test according to the interruption time.

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