Outdoor impulse current generator suitable for complex environment and horizontal structure thereof

Abstract

The application discloses an outdoor impulse current generator suitable for a complex environment and a horizontal structure thereof, and the horizontal structure comprises a multistage capacitor and an insulation support structure arranged in an outer cover; an xyz coordinate system is constructed with the length direction of the outer cover as an x axis, the width direction as a y axis and the height direction as a z axis; the multistage capacitor is arranged in the x direction, and each multistage capacitor is parallel to a yOz plane and is fixed on the insulation support structure; and the insulation distance between each multistage capacitor is applied in the x direction. The application changes the structure position of the multistage capacitor in the whole space coupling of the impulse current generator, i.e. the horizontal distribution of the multistage capacitor, applies the insulation distance between each multistage capacitor in the horizontal direction, reduces the overall height of the impulse discharge generator, improves the structural stability of the main body of the impulse current generator, reduces the influence of the complex environment on the main body, and improves the reliability and safety of the experiment.

Description

Technical Field

[0001] This invention relates to the field of high-voltage testing technology for power systems, specifically to an outdoor impulse current generator and its horizontal structure suitable for complex environments. Background Technology

[0002] Impulse current generators are important tools for simulating actual lightning and other impulse sources, and also crucial for studying the impulse characteristics of transmission lines, surge arresters, grounding systems, and other equipment. my country has a wide distribution of transmission lines, and the grounding safety of these lines in high-altitude permafrost regions has attracted widespread attention from experts both domestically and internationally. Due to the presence of permafrost, the grounding resistance of power facilities operating in these areas is relatively high. Therefore, to ensure the safety of facilities and personnel, the design of grounding systems in high-altitude permafrost regions needs to meet higher requirements, necessitating research into the grounding characteristics of permafrost areas.

[0003] Currently, impulse current generators used for studying grounding impulse characteristics are mainly designed for conventional altitude environments. These types of impulse current generators are only suitable for experimental environments with relatively stable climates. However, in high-altitude regions with extreme climates such as extreme cold, large temperature and humidity differences, and strong winds, commonly used impulse current generators cannot meet the requirements for conducting true soil current diffusion characteristics studies outdoors under high-altitude climatic conditions. Summary of the Invention

[0004] To address the problem that existing impulse current generators are unsuitable for conducting true soil current diffusion characteristic studies outdoors in complex environments such as high altitudes, this invention provides a horizontal structure for outdoor impulse current generators suitable for complex environments. By employing a horizontal structure, this invention changes the structural position of the capacitor in the overall spatial coupling, thereby overcoming the problems of poor experimental reliability and safety hazards caused by environmental influences in traditional vertical impulse generators.

[0005] This invention is achieved through the following technical solution:

[0006] A horizontal structure for an outdoor impulse current generator suitable for complex environments includes a multi-stage capacitor and an insulating support structure housed within an outer casing.

[0007] A coordinate system is constructed with the length direction of the outer cover as the x-axis, the width direction as the y-axis, and the height direction as the z-axis.

[0008] The multi-stage capacitors are distributed along the x-direction, and all the multi-stage capacitors are parallel to the yOz plane and fixed on the insulating support structure; the insulation distance between each stage capacitor is applied in the x-direction.

[0009] Compared to traditional vertical or tower structures, this invention changes the structural position of the multi-stage capacitors in the impulse current generator within the entire spatial coupling process. Specifically, the multi-stage capacitors are arranged horizontally, and the insulation distance between each stage capacitor is applied in the horizontal direction. This reduces the overall height of the impulse discharge generator, thereby improving the structural stability of the main body of the impulse current generator, reducing the impact of complex environments, and enhancing the reliability and safety of the experiment.

[0010] As a preferred embodiment, the insulating support structure of the present invention includes a support structure A parallel to the plane where yOz is located and a support structure B parallel to the plane where xOz is located.

[0011] The multi-stage capacitor is fixed on the support structure A.

[0012] In a preferred embodiment, each stage of the capacitor of the present invention is supported by an insulating support fixed to the ground.

[0013] In a preferred embodiment, the distance between the multi-stage capacitors of the present invention is maintained at a withstand voltage level of 200kV or higher, the insulation of the multi-stage capacitors to ground is required to be no less than 2000kV, and the charging voltage of each stage capacitor is ±100kV.

[0014] In a preferred embodiment, each stage of the capacitor of the present invention incorporates anti-corona measures.

[0015] In a preferred embodiment, the bottom of the outer cover of the present invention has a rectangular structure and the top has an arched structure;

[0016] The outer cover is not less than 7.5m in length and not less than 2.5m in width; the rectangular structure is not less than 1.8m in height and the arched structure is not less than 0.4m in height.

[0017] In a preferred embodiment, the height of each capacitor stage relative to ground can be adjusted according to the voltage of each capacitor stage relative to ground.

[0018] On the other hand, the present invention proposes an outdoor impulse current generator suitable for complex environments, including the above-mentioned horizontal structure, foundation and support components;

[0019] The horizontal structure is supported on the foundation by the support components.

[0020] In a preferred embodiment, the support assembly of the present invention consists of not less than 6 main pillars and not less than 8 reinforcing pillars;

[0021] Each main support column shall be no less than 6m in length, have a load-bearing capacity of no less than 500kg, and an insulation strength of no less than 500kV / m.

[0022] Each reinforcing post forms a 45° angle with the main post and is fixed to the two main posts respectively.

[0023] In a preferred embodiment, the foundation of the present invention has an internal space with a length greater than 7.5m, a width greater than 2.5m, and a height greater than 3m;

[0024] The interior space serves as the main control room.

[0025] The present invention has the following advantages and beneficial effects:

[0026] This invention adopts a horizontal structure design, which can prevent the influence of environmental factors such as strong winds in high-altitude areas on the equipment. It overcomes the problems of poor experimental reliability and safety hazards caused by the influence of strong winds and high altitudes on vertical structures (tower structures). It can be widely used in the study of grounding characteristics in frozen or non-frozen soil areas under the action of large currents in high-altitude areas.

[0027] The structure of this invention uses an insulating outer cover, which can protect against wind and rain, overcome the influence of the variable climate environment in high-altitude areas on the experimental results, and ensure the reliability of the experimental data.

[0028] This invention has a simple structure and strong engineering practicality, which improves the accuracy and reliability of real-world experiments and provides technical support for studying the impulse current dissipation characteristics of grounding systems in natural environments. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 These are three views of the impulse current generator device according to an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram illustrating the connection principle of the various parts of the main body in an embodiment of the present invention.

[0032] The attached diagram shows the markings and corresponding component names:

[0033] 1-Main body, 2-Supporting components, 3-Foundation, 4-Outer cover, 41-Rectangular structure, 42-Archive structure, 5-Capacitor. Detailed Implementation

[0034] In the following, the terms “comprising” or “may include” as used in various embodiments of the invention indicate the presence of an inventive function, operation, or element, and do not limit the addition of one or more functions, operations, or elements. Furthermore, as used in various embodiments of the invention, the terms “comprising,” “having,” and their cognates are intended only to indicate a specific feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as primarily excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or adding one or more combinations of the foregoing.

[0035] In various embodiments of the invention, the expression "or" or "at least one of A and / or B" includes any combination or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A and / or B" may include A, may include B, or may include both A and B.

[0036] The expressions used in the various embodiments of the present invention (such as "first," "second," etc.) may modify various constituent elements in the various embodiments, but do not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used for the purpose of distinguishing one element from other elements. For example, a first user device and a second user device refer to different user devices, although both are user devices. For example, a first element may be referred to as a second element without departing from the scope of the various embodiments of the present invention, and similarly, a second element may also be referred to as a first element.

[0037] It should be noted that if a description is made of "connecting" one component to another, then the first component can be directly connected to the second component, and a third component can be "connected" between the first and second components. Conversely, when a component is "directly connected" to another component, it can be understood that there is no third component between the first and second components.

[0038] The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to limit the various embodiments of the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the invention pertain. The terms (such as those defined in a generally used dictionary) are to be interpreted as having the same meaning as in the context of the relevant technical field and are not to be interpreted as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of the invention.

[0039] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0040] Example

[0041] Traditional vertical or tower-type impulse generators gradually elevate multiple capacitors to ensure sufficient insulation distance between the stacked capacitor voltages and the ground. This results in high-voltage impulse generators being quite tall, but this structure is only suitable for well-conditioned laboratory environments. However, studies on high-altitude permafrost impact and insulator icing impact characteristics require long-term outdoor operation of the impulse equipment in complex environments such as extreme cold, strong winds, and high altitudes. In such environments, significant temperature differences exist at different altitudes, and the varying ambient temperatures around different capacitor stages of the vertical impulse generator can lead to inconsistent discharge and test failure. Furthermore, the tall, narrow-section equipment is significantly affected by strong winds; excessively high outdoor equipment can sway, affecting the test and posing significant safety hazards. Therefore, this embodiment provides an outdoor impulse current generator suitable for complex environments, such as... Figure 1 As shown, the outdoor impulse current generator of this embodiment includes a foundation 3, a support assembly 2, and an impulse current generator body 1 arranged sequentially from bottom to top. The impulse current generator body 1 is a horizontal structure, consisting of the generator body core components, an outer casing 4, and an internal insulating support structure. A xyz coordinate system is constructed with the long side of the outer casing 4 of the impulse current generator body as the x-axis, the width as the y-axis, and the height as the z-axis. The multi-stage pulse capacitors in the impulse generator body are horizontally distributed, all parallel to the yOz plane, and fixed to the insulating support structure. The internal insulating support structure in the impulse generator body includes two types: support structure A parallel to the yOz plane and support structure B parallel to the xOz plane. The multi-stage capacitors are fixed to the insulating support structure A.

[0042] This invention, by altering the structural position of the multi-stage capacitors in the impulse current generator within the overall spatial coupling—specifically by horizontally distributing the multi-stage capacitors and applying the insulation distance between each capacitor stage in the horizontal direction—reduces the overall height of the impulse discharge generator. The maximum height of the capacitors is only the insulation distance from the highest rated voltage to ground, which is far less than the height of traditional vertical or tower-type impulse current generators. This improves the structural stability of the impulse current generator body, reduces the impact of complex environments, and enhances the reliability and safety of the experiment.

[0043] In the horizontal structure of this invention, each capacitor stage is supported by an insulating support fixed to the ground, which further improves the structural stability of the impulse current generator body and reduces the impact of complex environments.

[0044] Unlike traditional vertical or tower structures where the varying heights of each capacitor stage lead to different ground coupling capacitances, the horizontal structure of this invention allows for adjustments to the ground height based on the ground voltage of each capacitor stage. It also enables all capacitors to have the same ground height, resulting in consistent ground coupling capacitance for each stage. Therefore, the horizontal structure proposed in this invention offers simpler spatial coupling, facilitates inter-stage insulation design, and offers more diverse implementation methods, adapting to structural requirements in various scenarios.

[0045] The support component 2 of this invention consists of no less than 6 main supports and no less than 8 reinforcing supports. Each main support is no less than 6m long, can bear a weight of no less than 500kg, and has an insulation strength of no less than 500kV / m. Each reinforcing support is at a 45° angle to the main supports and is fixed to two main supports respectively, which can increase the mechanical strength of the impulse current generator and improve the stability and safety of the structure.

[0046] The foundation 3 of this embodiment has an internal space with a length greater than 7.5m, a width greater than 2.5m, and a height greater than 3m. The internal space serves as the main control room and is equipped with a power operation room, a DC charging power supply, a control box, and ventilation equipment.

[0047] In this embodiment of the invention, the outer cover has a rectangular bottom structure 41 and an arched top structure 42. The outer cover is at least 7.5m long and 2.5m wide, with the rectangular structure 41 having a height of at least 1.8m and the arched structure 42 having a height of at least 0.4m. The outer cover in this embodiment is sealed with a UV-resistant insulating sheet, which not only protects against wind and rain, preventing the influence of complex environments on experimental results, but also solves the design challenges of the outer cover.

[0048] The horizontal structure of this invention includes multiple capacitor stages. The distance between the capacitors meets a withstand voltage level of 200kV or higher, and the insulation to ground must be no less than 2000kV. Each stage has a charging voltage of ±100kV, and charging is symmetrical with positive and negative polarities. Anti-corona measures are adopted for each stage to reduce corona during charging. The synchronization gap adopts a sealed fixed pressure gap. The inherent inductance of the capacitor is less than 4uH / stage.

[0049] like Figure 2As shown, the main body of the impulse current generator in this embodiment mainly consists of a control system, a control cabinet, a charging switch, a power supply, a charging transformer, a pulse capacitor, a modulation shorting rod A, a modulation shorting rod B, a trigger isolation capacitor, a discharge electrode, a modulation inductor, a modulation resistor, a tail resistor, a safety grounding system, a voltage divider, and a fully isolated charging voltage feedback device.

[0050] The control system is connected to the control cabinet, fully isolated charging voltage feedback, safety grounding system, and charging transformer via optical fiber to control the aforementioned devices. The control cabinet is connected to the charging switch via optical fiber. The charging switch is connected to the charging transformer via braided copper strip. The charging transformer is connected to the pulse capacitor via braided copper strip. The pulse capacitor is connected to the trigger isolation capacitor via high-voltage leads. The trigger isolation capacitor is connected to the discharge electrode via leads. The discharge electrode is connected to the modulation inductor via braided copper strip. The modulation inductor is connected to the modulation resistor via braided copper strip. The modulation resistor is connected to the tail resistor via high-voltage leads. The tail resistor is connected to the safety grounding system via braided copper strip. The safety grounding system is connected to the voltage divider via braided copper strip. The voltage divider is connected to the fully isolated charging voltage feedback via braided copper strip. Modulation shorting rods A and B are made of metal and can change the series and parallel connection method between multiple pulse capacitors.

[0051] In this embodiment of the invention, the longitudinal distance (i.e., along the y-direction) between the horizontally arranged multi-stage capacitors is not less than 70cm, and the lateral distance (i.e., along the x-direction) between a single capacitor is not less than 145cm. The trigger gap is located between individual main capacitors, and the tuning inductor and tuning resistor are located between multiple main capacitors, fixed by a pull-up groove, allowing for the replacement of the tuning inductor and tuning resistor. Each capacitor is equipped with a grounding device.

[0052] In this embodiment of the invention, the tuning resistor is parallel to the xOz plane, and each tuning resistor is fixed to two internal support structures B at both ends by means of movable grooves, and is perpendicular to the yOz plane. This installation method makes it more convenient to replace the tuning resistor.

[0053] The inter-stage insulation can withstand a 220kV operating impulse voltage and a 110kV DC voltage without discharging. The main body of this invention can operate in various modes; using modulation shorting rod A and modulation shorting rod B can change the series or parallel operation mode of the impulse body.

[0054] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A horizontal structure for an outdoor impulse current generator suitable for complex environments, characterized in that, This includes multi-stage capacitors and insulating support structures housed within the outer casing; A coordinate system is constructed with the length direction of the outer cover as the x-axis, the width direction as the y-axis, and the height direction as the z-axis. Multi-stage capacitors are distributed along the x-direction, and all multi-stage capacitors are parallel to the yOz plane and fixed on the insulating support structure; the insulation distance between each stage capacitor is applied in the x-direction; the insulating support structure includes support structure A parallel to the yOz plane and support structure B parallel to the xOz plane; The multi-stage capacitor is fixed on the support structure A; The height of each capacitor to ground can be adjusted according to the voltage to ground of each capacitor. This allows for different heights to ground based on the voltage to ground of each capacitor, and also enables all capacitors to have the same height to ground so that the coupling capacitance to ground of each capacitor is consistent.

2. The horizontal structure of an outdoor impulse current generator suitable for complex environments according to claim 1, characterized in that, Each capacitor stage is supported by an insulated support fixed to the ground.

3. The horizontal structure of an outdoor impulse current generator suitable for complex environments according to claim 1, characterized in that, The distance between multiple capacitors should be maintained at a withstand voltage level of 200kV or higher. The insulation of multiple capacitors to ground should be no less than 2000kV. The charging voltage of each capacitor should be ±100kV.

4. The horizontal structure of an outdoor impulse current generator suitable for complex environments according to claim 1, characterized in that, Each capacitor stage is equipped with anti-corona measures.

5. The horizontal structure of an outdoor impulse current generator suitable for complex environments according to claim 1, characterized in that, The bottom of the outer cover has a rectangular structure, and the top has an arched structure; The outer cover is not less than 7.5m in length and not less than 2.5m in width; the rectangular structure is not less than 1.8m in height and the arched structure is not less than 0.4m in height.

6. An outdoor impulse current generator suitable for complex environments, characterized in that, Includes the horizontal structure, foundation, and support components as described in any one of claims 1-5; The horizontal structure is supported on the foundation by the support components.

7. The outdoor impulse current generator suitable for complex environments according to claim 6, characterized in that, The support assembly consists of no less than 6 main pillars and no less than 8 reinforcing pillars; Each main support column shall be no less than 6m in length, have a load-bearing capacity of no less than 500kg, and an insulation strength of no less than 500kV / m. Each reinforcing post is at a 45° angle to the main post and is fixed to the two main posts respectively.

8. The outdoor impulse current generator suitable for complex environments according to claim 6, characterized in that, The foundation has an internal space that is longer than 7.5m, wider than 2.5m, and higher than 3m. The interior space serves as the main control room.

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