GIS equipment electromechanical state and typical defect simulation test platform and method

Abstract

The invention discloses a GIS equipment electromechanical state and typical defect simulation test platform and a GIS equipment electromechanical state and typical defect simulation test method, relates to the field of electrical equipment electromechanical state and typical defect simulation tests, and solves the problem of simulation and research of electromechanical states and defect characteristics of gas insulated switchgear (GIS) under different operation conditions. Wherein the test platform comprises an AC voltage source, a GIS scaling model, a vibration table and an excitation power amplifier, defects are preset in the GIS scaling model, the GIS scaling model is provided with a transparent observation window used for observing the internal condition of the model, and the GIS scaling model is fixedly installed on the vibration table; an alternating-current voltage source is loaded on a GIS scaling model bus to simulate distribution of an electric field in a GIS, and vibration is applied to the GIS scaling model through a vibration table and an excitation power amplifier to simulate GIS vibration caused by current.

Description

[Technical field]

[0001] The invention belongs to electric power engineering technology, and in particular to the field of electromechanical state and typical defect simulation test of electric power equipment. [Background technology]

[0002] As the global demand for electricity continues to grow, gas-insulated switchgear (GIS) plays a vital role in modern power systems. With its compact design and superior insulation performance, GIS has become a key component of high-voltage power systems. They can not only effectively reduce the footprint of equipment, but also improve the reliability of power transmission. However, GIS equipment will inevitably face challenges from various electromechanical states and defects during its life cycle. These problems may be caused by a variety of factors, including material aging, mechanical stress, environmental factors, etc., which lead to a decrease in the insulation performance of the equipment or structural damage, thereby causing equipment failure and even major safety accidents. Therefore, in-depth research on the electromechanical state of GIS equipment and its typical defects is of great significance to improving the operational safety and reliability of the equipment and ensuring the stability of the power system.

[0003] In order to effectively simulate and study the electromechanical state and defect characteristics of gas-insulated switchgear (GIS) under different operating conditions, it is particularly important to develop an efficient and low-cost test platform. First, the complexity of the current power system and the diversity of GIS equipment require systematic testing and analysis in a laboratory environment to reproduce the various operating conditions and failure modes that the equipment may encounter in actual applications. Due to the high-voltage characteristics and internal structural complexity of GIS equipment, conventional experimental methods often fail to fully reflect its true performance in operation. Therefore, designing a test platform that can adjust multiple parameters under controlled conditions can allow researchers to gain a deep understanding of the electromechanical behavior of GIS equipment, thereby identifying potential defects and failure mechanisms.

[0004] Secondly, considering the maintenance and testing costs of equipment, developing a low-cost test platform has important practical significance. In the current power industry, the operation and maintenance costs of equipment often account for a large part of the operating costs. Therefore, the use of more economical scaled models and simplified experimental settings can not only reduce the testing costs, but also enable a large number of repeated experiments under different working conditions to accumulate rich data. These data provide important support for equipment health management and fault prediction.

[0005] Finally, the design of this test platform should be flexible so as to adapt to different types of GIS equipment and various fault simulation requirements. For example, the experimental modules can be quickly replaced and adjusted according to the specific research objectives, including different types of typical defects, vibration parameters and voltage conditions, so as to achieve diversified experimental settings. This flexible test platform can not only improve the efficiency of the experiment, but also promote the research progress of GIS equipment in terms of operating performance and reliability. Through the development of this efficient and low-cost test platform, it can provide the power industry with a more comprehensive means of equipment evaluation, promote the reliability and safety research of equipment, and contribute to the sustainable development of the industry. [Summary of the invention]

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a GIS equipment electromechanical state and typical defect simulation test platform and construction method, develop a low-cost test platform, solve the problem of simulating and studying the electromechanical state and defect characteristics of gas insulated switchgear (GIS) under different operating conditions, simulate the internal electric field distribution of the equipment by loading AC high voltage, simulate the mechanical vibration state of the equipment by applying vibration, and simulate the operation of the equipment under different conditions by setting different typical defects, so as to adapt to different types of GIS equipment and various fault simulation needs.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A GIS equipment electromechanical state and typical defect simulation test platform comprises an AC voltage source, a GIS scaled model, a vibration table and an excitation power amplifier. The GIS scaled model is pre-set with defects inside, the GIS scaled model is provided with a transparent observation window for observing the internal situation of the model, and the GIS scaled model is fixedly installed on the vibration table. An AC voltage source is loaded on the GIS scaled model bus to simulate the internal electric field distribution of the GIS, and vibration is applied to the GIS scaled model through the vibration table and the excitation power amplifier to simulate the GIS vibration caused by current.

[0009] Preferably, the size reduction ratio of the GIS scaled model and the actual GIS equipment is consistent with the rated electrical compression ratio, and the voltage level provided by the AC voltage source meets the rated voltage value after scaling.

[0010] Preferably, the GIS scaled model includes a charging / exhausting valve, a pressure gauge and a high-voltage guide rod, and the high-voltage guide rod is connected to an AC voltage source.

[0011] Preferably, two insulating basins are provided at both ends of the GIS scaled model, respectively having a concave surface and a convex surface of the basin.

[0012] Preferably, a sealing ring is provided in the groove of the insulating basin.

[0013] Preferably, two transparent observation windows are symmetrically distributed on both sides of the GIS scaled model, one side is a lighting window and the other side is an observation window.

[0014] Preferably, the GIS scaled model has a fixing screw hole, and the fixing screw hole is fixedly connected to the vibration table by a screw.

[0015] Preferably, the defect locations include on the model cylinder wall, on the insulating basin and near the high-voltage guide rod.

[0016] Preferably, the defects provided include two categories: mechanical defects and insulation defects. Mechanical defects include poor contact, looseness, and falling foreign matter of structural parts, and insulation defects include sharp points, suspension, air gaps, particles, and surface discharge.

[0017] In addition, a method for building a GIS equipment electromechanical state and typical defect simulation test platform is provided, which includes the following steps:

[0018] First, the defects are pre-set inside the GIS scaled model;

[0019] Next, assemble the GIS scale model, place the sealing ring in the groove on the insulating basin, and install it on both sides of the GIS scale model, evacuate the GIS through the filling / exhausting valve, and then fill it with 0.45MPa sulfur hexafluoride gas, and observe the air pressure value through the barometer;

[0020] Afterwards, the GIS scaled model is fixedly mounted on a vibration table, an AC voltage source is connected to the scaled model, and the GIS scaled model is grounded.

[0021] The technical solution adopted by the present invention is to load an AC voltage source on the busbar of a GIS scaled model to simulate the electric field distribution inside the GIS; apply vibration to the scaled model through an electric vibration table and an excitation power amplifier to simulate the GIS vibration caused by current; set various typical GIS defects in the scaled model to simulate the defect effects; in addition, researchers can measure the multi-physical signals of the model through a variety of detection equipment.

[0022] Therefore, compared with the prior art, the present invention has the following beneficial effects:

[0023] Defect simulation is more comprehensive and realistic: The present invention can more comprehensively simulate various faults that may occur in actual GIS equipment by presetting typical mechanical and insulation defects in the GIS scaled model, including tip defects, suspension defects, air gaps, particles, poor contact, looseness, etc. Compared with the single or simple defect simulation in the prior art, the defect settings of the present invention are richer, cover a wider range, and can be closer to complex problems in real application scenarios.

[0024] Efficient experimental process: The present invention realizes efficient testing under laboratory conditions by rigidly mounting the scaled model on the vibration table. The scaled model has a simple design and is easy to install. After the defect is set, it can be quickly assembled, vacuumed and inflated. Compared with the prior art, the present invention significantly improves experimental efficiency and reduces experimental preparation time.

[0025] Transparent observation window design facilitates real-time monitoring: The scaled model is equipped with a transparent observation window. The design of the lighting window and observation window allows researchers to clearly and intuitively observe the defect status and changes inside the GIS, improving the understanding of the development dynamics of the defects. Compared with the equipment in the prior art that lacks internal real-time observation capabilities, the present invention obviously provides stronger visualization capabilities.

[0026] Analysis of multiple defect types: The present invention can simulate and analyze multiple defects on the same test platform, supporting the simultaneous study of mechanical defects and insulation defects. The existing technology usually only tests a single defect, and the present invention has obvious advantages in comprehensive testing of multiple defects, which helps to conduct in-depth research on the interaction of different types of defects and their impact on the overall performance of GIS equipment.

[0027] Multi-physics field coupling test capability: The test platform of the present invention can simulate the electric field and mechanical vibration of GIS equipment at the same time. Through the synergy of high-voltage AC source and vibration table, it can accurately reproduce the electrical and mechanical stress environment in the actual equipment. This multi-physics field coupling test capability makes the research more realistic. Existing technologies rarely perform defect analysis under electrical and mechanical stress at the same time.

[0028] Cost saving and reduced experimental risk: By using a scaled model instead of the real GIS equipment for testing, the present invention greatly reduces the experimental cost and experimental risk. Compared with directly testing the actual equipment under high voltage, the scaled model of the present invention has the characteristics of high safety and low cost, reducing the risk of equipment damage and experimental personnel injury.

[0029] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0030] The invention will be further described below in conjunction with the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of the scaled-down GIS basic model;

[0032] Figure 2 It is a cross-sectional view of the transparent observation window part of the scaled GIS basic model;

[0033] Figure 3 This is a schematic diagram of the GIS equipment electromechanical status and typical defect simulation test platform;

[0034] Figure 4 The schematic diagram of the location of typical electromechanical defects is shown;

[0035] Figure numerals: GIS scale model 1, transparent observation window 11, filling / exhausting valve 12, pressure gauge 13, insulating basin 14, sealing ring 15, fixing screw hole 16, grounding screw hole 17, high-voltage busbar 18. [Specific implementation method]

[0036] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0037] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0038] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "left", "right", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0042] Reference Figures 1 to 4 The embodiment of the present invention provides a GIS equipment electromechanical state and typical defect simulation test platform, including an AC voltage source, a GIS scaled model 1, a vibration table and an excitation power amplifier. The GIS scaled model is pre-set with defects inside to simulate the defect effect. The GIS scaled model is provided with a transparent observation window 11 for observing the internal situation of the model, and the GIS scaled model is fixedly installed on the vibration table. An electric vibration table is used, which is powered by an excitation power amplifier, and the excitation power amplifier controls the vibration table to output sinusoidal vibration. It is required that the amplitude of high-voltage AC and sinusoidal vibration can be adjusted to achieve the electromechanical state simulation of the GIS equipment. Therefore, an AC voltage source is loaded on the busbar of the GIS scaled model to simulate the internal electric field distribution of the GIS, and the vibration is applied to the GIS scaled model through the vibration table and the excitation power amplifier to simulate the GIS vibration caused by the current. Researchers can measure the multi-physical signals of the model through a variety of detection equipment to achieve low-cost and high-fidelity simulation of the actual GIS equipment operation state. The present invention also supports real-time observation of internal defects through a transparent observation window. The design of the scaled model simplifies some non-critical structures that do not affect the research, ensuring the flexibility and operability of the experiment.

[0043] Among them, the size reduction value and rated electrical compression ratio of the GIS scaled model and the actual GIS equipment are consistent, so the voltage level provided by the AC voltage source should meet the rated voltage value after reduction. The GIS scaled model includes a charging / exhausting valve 12, a pressure gauge 13 and a high-voltage guide rod, and the high-voltage guide rod is connected to the AC voltage source through a high-voltage bus 18. Two insulating basins 14 are correspondingly provided at both ends of the GIS scaled model, respectively having a concave surface and a convex surface of the basin, which can be replaced and installed to conduct relevant research on the insulating basin. A sealing ring 15 is provided in the groove of the insulating basin. Two transparent observation windows are symmetrically distributed on both sides of the GIS scaled model, one side is a lighting window, and the other side is an observation window.

[0044] In addition, the GIS scaled model has a fixing screw hole 16 and a grounding screw hole 17. The fixing screw hole is fixedly connected to the vibration table through a screw, and the grounding screw hole is connected to the grounding wire through a screw.

[0045] It is understandable that some unimportant structures can be appropriately simplified, and the insulating basin material can be replaced by a material similar to epoxy resin.

[0046] like Figure 4As shown, the defect locations include on the model cylinder wall, on the insulation basin and near the high-voltage guide rod. The defects set include two categories: mechanical defects and insulation defects. Mechanical defects include poor contact, looseness and foreign matter falling of structural parts, and insulation defects include tips, suspension, air gaps, particles and surface discharge.

[0047] In addition, a method for building a GIS equipment electromechanical state and typical defect simulation test platform is provided, which includes the following steps:

[0048] First, the defects are pre-set inside the GIS scaled model, such as Figure 4 As shown, the setting positions include on the wall of the model tube, on the insulating basin and near the high-voltage guide rod. The defects set include but are not limited to mechanical defects and insulation defects. Typical mechanical defects include but are not limited to poor contact, looseness, and falling of foreign objects of structural parts. Typical insulation defects include but are not limited to tips, suspension, air gaps, particles, and surface discharge.

[0049] After setting the defects, assemble the GIS scaled model, such as Figure 1 As shown, place the sealing ring in the groove on the insulating basin and install it on both sides of the scaled model; first, evacuate the GIS through the filling / exhausting valve, then fill it with 0.45MPa sulfur hexafluoride gas, and observe the air pressure value through the barometer. After that, rigidly install the scaled model on the vibration table through the screw structure, connect the high-voltage AC source to the high-voltage guide rod of the scaled model, and ground the aluminum alloy shell of the model. Figure 2 As shown, the transparent observation windows are symmetrically distributed on both sides of the scaled model, one side is a lighting window, and the other side is an observation window, through which the internal conditions of the model can be observed.

[0050] During the test, a high-voltage AC source applies high voltage to the model, and the power amplifier controls the vibration table to output sinusoidal vibration. It is required that the amplitudes of both the high-voltage AC and the sinusoidal vibration can be controlled to achieve the mechanical and electrical state simulation of the GIS equipment.

[0051] Compared with the prior art, the present invention has the following advantages:

[0052] Defect simulation is more comprehensive and realistic: The present invention can more comprehensively simulate various faults that may occur in actual GIS equipment by presetting typical mechanical and insulation defects in the GIS scaled model, including tip defects, suspension defects, air gaps, particles, poor contact, looseness, etc. Compared with the single or simple defect simulation in the prior art, the defect settings of the present invention are richer, cover a wider range, and can be closer to complex problems in real application scenarios.

[0053] Efficient experimental process: The present invention realizes efficient testing under laboratory conditions by rigidly mounting the scaled model on the vibration table. The scaled model has a simple design and is easy to install. After the defect is set, it can be quickly assembled, vacuumed and inflated. Compared with the prior art, the present invention significantly improves experimental efficiency and reduces experimental preparation time.

[0054] Transparent observation window design facilitates real-time monitoring: The scaled model is equipped with a transparent observation window. The design of the lighting window and observation window allows researchers to clearly and intuitively observe the defect status and changes inside the GIS, improving the understanding of the development dynamics of the defects. Compared with the equipment in the prior art that lacks internal real-time observation capabilities, the present invention obviously provides stronger visualization capabilities.

[0055] Analysis of multiple defect types: The present invention can simulate and analyze multiple defects on the same test platform, supporting the simultaneous study of mechanical defects and insulation defects. The existing technology usually only tests a single defect, and the present invention has obvious advantages in comprehensive testing of multiple defects, which helps to conduct in-depth research on the interaction of different types of defects and their impact on the overall performance of GIS equipment.

[0056] Multi-physics field coupling test capability: The test platform of the present invention can simulate the electric field and mechanical vibration of GIS equipment at the same time. Through the synergy of high-voltage AC source and vibration table, it can accurately reproduce the electrical and mechanical stress environment in the actual equipment. This multi-physics field coupling test capability makes the research more realistic. Existing technologies rarely perform defect analysis under electrical and mechanical stress at the same time.

[0057] Cost saving and reduced experimental risk: By using a scaled model instead of the real GIS equipment for testing, the present invention greatly reduces the experimental cost and experimental risk. Compared with directly testing the actual equipment under high voltage, the scaled model of the present invention has the characteristics of high safety and low cost, reducing the risk of equipment damage and experimental personnel injury.

[0058] The above is only a specific embodiment of the invention, but the protection scope of the invention is not limited thereto. Those skilled in the art should understand that the invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the invention will be included in the scope of the claims.

Claims

1. A GIS equipment electromechanical state and typical defect simulation test platform, characterized in that: The invention comprises an alternating current voltage source, a GIS scaled model, a vibration table and an excitation power amplifier. The interior of the GIS scaled model is pre-set with defects, the GIS scaled model is provided with a transparent observation window for observing the internal conditions of the model, and the GIS scaled model is fixedly mounted on the vibration table. An alternating current voltage source is loaded on the busbar of the GIS scaled model to simulate the electric field distribution inside the GIS, and vibration is applied to the GIS scaled model through the vibration table and the excitation power amplifier to simulate the GIS vibration caused by the current.

2. A GIS equipment electromechanical state and typical defect simulation test platform according to claim 1, characterized in that: The size reduction ratio of the GIS scaled model and the actual GIS equipment is consistent with the rated electrical compression ratio, and the voltage level provided by the AC voltage source meets the rated voltage value after scaling.

3. A GIS equipment electromechanical state and typical defect simulation test platform according to claim 2, characterized in that: The GIS scaled model comprises a charging / exhausting valve, a pressure gauge and a high-voltage guide rod, and the high-voltage guide rod is connected to an AC voltage source.

4. A GIS equipment electromechanical state and typical defect simulation test platform according to claim 3, characterized in that: Two insulating basins are correspondingly arranged at the two ends of the GIS scaled model, each having a concave surface and a convex surface of the basin.

5. A GIS equipment electromechanical state and typical defect simulation test platform according to claim 4, characterized in that: A sealing ring is arranged in the groove of the insulating basin.

6. The GIS equipment electromechanical state and typical defect simulation test platform according to claim 1 is characterized in that: Two transparent observation windows are symmetrically distributed on both sides of the GIS scaled model, one side is the lighting window and the other side is the observation window.

7. The GIS equipment electromechanical state and typical defect simulation test platform according to claim 1 is characterized in that: The GIS scaled model has a fixing screw hole, and the fixing screw hole is fixedly connected to the vibration table through a screw.

8. The GIS equipment electromechanical state and typical defect simulation test platform according to claim 4 is characterized in that: The locations where the defects are set include on the model tube wall, on the insulation basin and near the high-voltage guide rod.

9. A GIS equipment electromechanical state and typical defect simulation test platform according to claim 8, characterized in that: The defects set include two categories: mechanical defects and insulation defects. Mechanical defects include poor contact, looseness, and falling foreign objects of structural parts; insulation defects include tips, suspension, air gaps, particles, and surface discharge.

10. A method for building a GIS equipment electromechanical state and typical defect simulation test platform, characterized in that: The steps include: First, the defects are pre-set inside the GIS scaled model; Next, assemble the GIS scale model, place the sealing ring in the groove on the insulating basin, and install it on both sides of the GIS scale model, evacuate the GIS through the filling / exhausting valve, and then fill it with 0.45MPa sulfur hexafluoride gas, and observe the air pressure value through the barometer; Afterwards, the GIS scaled model is fixedly mounted on a vibration table, an AC voltage source is connected to the scaled model, and the GIS scaled model is grounded.

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