A real-type GIS particle simulation test device and observation system

Abstract

The present application relates to a kind of true GIS particle simulation test device and observation system, observation system includes built-in sensor, external sensor and true GIS particle simulation test device, true GIS particle simulation test device includes circuit breaker, conversion component, grounding component and current transformer;Circuit breaker is connected with conversion component by first conductor, the end of conversion component away from first conductor is connected with current transformer by second conductor, the end of current transformer away from second conductor is connected with grounding component by third conductor, the end of grounding component away from third conductor is connected with circuit breaker by fourth conductor;By carrying out metal foreign matter discharge simulation test, the reliable observation of particle induced discharge in GIS is realized, effective particle detection and suppression measures are developed, the failure rate of GIS particle discharge is reduced, and excessive maintenance is avoided;At the same time, save material, manpower and financial resources, ensure the safe and stable operation of power system.

Description

Technical Field

[0001] The present invention relates to the technical field of GIS particle simulation test devices, and in particular to a true GIS particle simulation test device and an observation system. Background Art

[0002] Gas-insulated switchgear (GIS) is a type of gas-insulated metal-enclosed switchgear (GIS) that uses sulfur hexafluoride (SF6) as the insulating medium. It boasts advantages such as small footprint, long maintenance cycles, and easy transportation and installation. Since the 1960s, it has been widely used both domestically and internationally. However, nearly 60 years of operational experience show that insulation failures remain a significant factor limiting GIS reliability.

[0003] A 1996 global survey by the International Conference on Large Electric Systems (CIGRE) found that GIS failure rates for voltage levels above 145kV, 245kV, 300kV, and 420kV were 0.26, 0.67, 1.8, and 3.9 events per 100 intervals per year, respectively. These rates are significantly higher than the IEC recommended rate of 0.1 event per 100 intervals per year, and the failure rate increases significantly with increasing voltage levels. According to recent statistics from the State Grid Corporation of China, 49% of GIS tripping incidents are caused by particulate matter. The harm posed by particulate matter within GIS to the insulation reliability of the equipment cannot be ignored and has attracted significant attention from both industry and academia.

[0004] However, the mechanism of particle-induced discharge under operating conditions has been unclear for a long time. A large number of laboratory simulation studies on particle movement and suppression have been carried out. However, the existing laboratory scaled simulation tests and real-type verification tests are difficult to effectively carry out equivalent experimental research. There are significant differences between the generation of particles under actual GIS operating conditions and their impact on insulation. As a result, the mechanism of particle-induced discharge is still unclear, making it difficult to guide the formulation of effective particle detection and suppression measures. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the purpose of the present invention is to provide a real GIS particle simulation test device and observation system. Its advantage is that it can narrow the difference between experimental research and actual GIS in terms of particle generation and its impact on insulation under operating conditions, realize reliable observation of particle-induced discharge in GIS, and formulate effective particle detection and suppression measures.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions: On the one hand, the present invention provides a real GIS particle simulation test device, including a circuit breaker, a conversion component, a grounding component and a current transformer; the circuit breaker is connected to the conversion component through a first conductor, the end of the conversion component away from the first conductor is connected to the current transformer through a second conductor, the end of the current transformer away from the second conductor is connected to the grounding component through a third conductor, and the end of the grounding component away from the third conductor is connected to the circuit breaker through a fourth conductor, so that the circuit breaker, the conversion component, the current transformer and the grounding component form a loop; the conversion component includes a first state and a second state, and the first state and the second state can be converted to each other; the first state is used for the study of particle surface flashover discharge; the second state is used to study the impact on particle discharge and the effectiveness of particle suppression measures.

[0007] Preferably, in the real GIS particle simulation test device provided by the present invention, at least two observation ports and at least two test pull-out ports are provided on the outer wall of the circuit breaker, and the observation ports and the test pull-out ports are arranged crosswise along the central axis direction of the circuit breaker, and the two observation ports and the two test pull-out ports are connected to the cavity of the circuit breaker; the test pull-out ports are used to install built-in sensors.

[0008] Preferably, in the real GIS particle simulation test device provided by the present invention, the conversion component includes an isolating switch and a busbar gas chamber, one end of the isolating switch is connected to the busbar gas chamber, the other end of the isolating switch is connected to the first conductor, and the end of the busbar gas chamber facing away from the isolating switch is connected to the second conductor.

[0009] Preferably, in the real GIS particle simulation test device provided by the present invention, when the conversion component is in the first state, the break of the disconnector is in a vertical state, and the bottom end of the break in the vertical state is a horizontal insulating basin; when the conversion component is in the second state, the break of the disconnector is in a horizontal state.

[0010] Preferably, in the real GIS particle simulation test device provided by the present invention, at least two observation openings are provided on the outer wall of the isolating switch, the two observation openings are arranged opposite to each other, and both of the two observation openings are connected to the cavity of the isolating switch.

[0011] Preferably, in the real GIS particle simulation test device provided by the present invention, at least two detection openings are opened on the outer wall of the busbar air chamber, the two detection openings are arranged opposite to each other, and both of the two detection openings are connected to the busbar air chamber.

[0012] Preferably, in the real GIS particle simulation test device provided by the present invention, the grounding component includes a bushing and an isolating grounding switch, the top end of the isolating grounding switch is connected to the bushing, and the bottom end of the isolating grounding switch is connected to the current transformer through the third conductor.

[0013] Preferably, in the real GIS particle simulation test device provided by the present invention, the isolating grounding switch includes an isolating switch and a grounding switch, the isolating switch and the grounding switch are arranged along the central axis direction of the sleeve, the fracture gap of the isolating switch is adjustable, and the size of the access impulse voltage can be adjusted by adjusting the fracture gap of the isolating switch; the grounding switch is used to connect to the grounding point.

[0014] Preferably, in the real GIS particle simulation test device provided by the present invention, one end of the grounding component is used to connect to the protective resistor, one end of the grounding component is used to connect to one end of the protective resistor, the other end of the protective resistor is connected to the armored transformer, and the protective resistor cooperates with the fast protection device in the armored transformer to protect the AC power supply in the event of a fault.

[0015] On the other hand, the present invention provides an observation system, including a built-in sensor, an external sensor and the above-mentioned true GIS particle simulation test device, wherein the built-in sensor is arranged in the circuit breaker or in the conversion component; the external sensor is arranged on the outer wall of the circuit breaker or on the outer wall of the conversion component.

[0016] In summary, the beneficial technical effects of the present invention are as follows: the present application provides a true GIS particle simulation test device and an observation system, the observation system includes a built-in sensor, an external sensor and a true GIS particle simulation test device, the built-in sensor is arranged in the circuit breaker or in the conversion component; the external sensor is arranged on the outer wall of the circuit breaker or on the outer wall of the conversion component; the true GIS particle simulation test device includes a circuit breaker, a conversion component, a grounding component and a current transformer; the circuit breaker is connected to the conversion component through a first conductor, the end of the conversion component away from the first conductor is connected to the current transformer through a second conductor, the end of the current transformer away from the second conductor is connected to the grounding component through a third conductor, and the end of the grounding component away from the third conductor is connected to the circuit breaker through a fourth conductor, so that the circuit breaker, the conversion component, the current transformer and the grounding component form a loop; the conversion component includes a first conductor The first state and the second state can be converted to each other; the first state is used to study the flashover discharge of particles along the surface; the second state is used to study the influence on the particle discharge and the effectiveness of the particle suppression measures; on the one hand, by setting the first state and the second state of the conversion component, they can be converted to each other, and the built-in sensor and the external sensor are set in the real GIS particle simulation test device, thereby, in the metal foreign body discharge simulation test, the discharge caused by particles in the GIS can be reliably observed, and effective particle detection and suppression measures can be formulated to reduce the failure rate of GIS particle discharge and avoid excessive maintenance; at the same time, material, human and financial resources can be saved to ensure the safe and stable operation of the power system; on the other hand, by setting up a real GIS particle simulation test device, compared with the scaled model, it is equivalent to the actual equipment, narrowing the difference between the experimental research and the actual GIS in the generation of particles and their influence on insulation under operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the real GIS particle simulation test device provided in an embodiment of the present invention.

[0018] Figure 2 It is a schematic structural diagram of the first state of the conversion component in the real GIS particle simulation test device provided by an embodiment of the present invention.

[0019] Figure 3 It is a schematic diagram of the second state structure of the conversion component in the real GIS particle simulation test device provided by an embodiment of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the grounding component in the real GIS particle simulation test device provided in an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the overall structure of an observation system provided by another embodiment of the present invention.

[0022] Figure 6 This is a diagram of linear particle motion behavior in an observation system provided by another embodiment of the present invention.

[0023] Figure 7 This is a diagram of linear particle motion behavior-sensing signals in an observation system provided by another embodiment of the present invention.

[0024] In the figure, 1. Observation system; 10. Built-in sensor; 11. Built-in optical sensor; 12. Built-in UHF sensor; 20. External sensor; 30. Real GIS particle simulation test device; 31. Circuit breaker; 311. Test port; 312. Observation port; 32. Conversion assembly; 321. Disconnector; 3211. Observation port; 3212. Left chamber; 322. Busbar air chamber; 3221. Detection port; 323. Horizontal insulating basin; 33. Grounding assembly; 331. Bushing; 332. Isolating grounding switch; 34. Current transformer; 35. First conductor; 36. Second conductor; 37. Third conductor; 38. Fourth conductor; 39. Protective resistor. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Reference Figure 1 , which is a true GIS particle simulation test device 30 disclosed in the present invention. Exemplarily, the true GIS particle simulation test device 30 can adopt a single-phase structure. In other optional embodiments, the true GIS particle simulation test device 30 can also adopt a multi-phase structure.

[0027] For ease of explanation, the following description will be made by taking a real GIS particle simulation test device 30 with a single-phase structure as an example.

[0028] Among them, the real GIS particle simulation test device 30 includes a circuit breaker 31, a conversion component 32, a grounding component 33 and a current transformer 34; the circuit breaker 31 is connected to the conversion component 32 through a first conductor 35, and the end of the conversion component 32 away from the first conductor 35 is connected to the current transformer 34 through a second conductor 36, and the end of the current transformer 34 away from the second conductor 36 is connected to the grounding component 33 through a third conductor 37, and the end of the grounding component 33 away from the third conductor 37 is connected to the circuit breaker 31 through a fourth conductor 38, so that the circuit breaker 31, the conversion component 32, the current transformer 34 and the grounding component 33 form a loop.

[0029] The test section mainly includes the circuit breaker 31 and the conversion component 32.

[0030] The operating voltage of the real GIS particle simulation test device 30 provided in this embodiment is 145 kV, the power frequency withstand voltage is 460 kV, and the lightning impulse withstand voltage is 1050 kV.

[0031] During use, the circuit breaker 31, the conversion component 32, the current transformer 34 and the grounding component 33 form a loop. The industrial frequency AC test power supply is provided by a 550kV armored transformer (including a voltage regulator and a control console), with a maximum capacity of up to 275kVA; the impulse test power supply is provided by a 7-level spherical gap 1400kV impulse generator, which can realize the test condition simulation of operating conditions (industrial frequency) and complex conditions (industrial frequency superimposed impulse).

[0032] Continue to refer to Figure 2 and Figure 3 In this embodiment, the conversion component 32 includes a first state and a second state, and the first state and the second state can be converted to each other; the first state is used to study the surface flashover discharge of particles; the second state is used to study the impact on particle discharge and the effectiveness of particle suppression measures.

[0033] Specifically, the first state is used to achieve the reproduction of particle discharge, and is mainly used for the study of particle surface flashover discharge; the second state is to rotate on the basis of the first state to obtain the second state.

[0034] Continue to refer to Figures 1 to 3 In this embodiment, the conversion assembly 32 includes an isolating switch 321 and a busbar gas chamber 322. One end of the isolating switch 321 is connected to the busbar gas chamber 322, the other end of the isolating switch 321 is connected to the first conductor 35, and the end of the busbar gas chamber 322 facing away from the isolating switch 321 is connected to the second conductor 36.

[0035] Furthermore, in this embodiment, when the conversion component 32 is in the first state, the break of the isolating switch 321 is in a vertical state, and the bottom end of the break in the vertical state is a horizontal insulating basin 323; when the conversion component 32 is in the second state, the break of the isolating switch 321 is in a horizontal state.

[0036] Specifically, Figure 2 Taking the shown orientation as an example, when the conversion component 32 is in the first state, the port of the disconnector 321 is in a vertical position. At this time, the horizontal insulating basin 323 is below the break, and the right side of the disconnector 321 is connected to the busbar air chamber 322. When the conversion component 32 is in the first state, in this state, the particles can only fall or be placed on the horizontal insulating basin 323 due to gravity. Therefore, it is easy to reproduce the particle discharge, which is mainly used for the study of particle surface flashover discharge.

[0037] When the conversion component 32 is in the second state, the second state is based on the first state. Figure 2The left chamber 3212 is the axis. The disconnector 321 is rotated 90 degrees counterclockwise. At this time, the fracture of the disconnector 321 is in a horizontal state, and the right side of the disconnector 321 is connected to the busbar air chamber 322. The second state is an improved structure. When the disconnector 321 is in the second state, the horizontal insulating basin 323 is prevented from failing. The second state is less prone to discharge than the first state. Therefore, the second state is used to study the impact of the improved structure of the disconnector 321 on particle discharge. The fracture and inner wall of the disconnector 321 are both in a horizontal state, which facilitates the arrangement of particle traps on the inner wall of the disconnector 321 for studying the effectiveness of particle suppression measures.

[0038] Continue to refer to Figure 1 In this embodiment, at least two observation openings 3211 are provided on the outer wall of the isolating switch 321 . The two observation openings 3211 are arranged opposite to each other, and both of the two observation openings 3211 are connected to the cavity of the isolating switch 321 .

[0039] Specifically, according to the test requirements, an observation cover or a cover for the built-in sensor 10 can be provided on the two observation ports 3211 .

[0040] Furthermore, in this embodiment, at least two detection openings 3221 are formed on the outer wall of the busbar air chamber 322 . The two detection openings 3221 are arranged opposite to each other and are both communicated with the busbar air chamber 322 .

[0041] It should be noted that the busbar air chamber 322 is mainly used to carry out auxiliary research on complex structure air chambers.

[0042] According to the test requirements, an observation cover or a cover with a built-in sensor 10 can be provided on the two detection ports 3221 .

[0043] Continue to refer to Figure 1 and Figure 4 In this embodiment, the grounding assembly 33 includes a bushing 331 and an isolating grounding switch 332 . The top end of the isolating grounding switch 332 is connected to the bushing 331 , and the bottom end of the isolating grounding switch 332 is connected to the current transformer 34 through a third conductor 37 .

[0044] During use, the impact source is connected to the real GIS particle simulation test device 30 through the sleeve 331 , and the bottom end of the sleeve 331 is connected to the isolation grounding switch 332 .

[0045] Furthermore, in this embodiment, the isolating and grounding switch 332 includes an isolating switch DS and a grounding switch ES. The isolating switch DS and the grounding switch ES are arranged along the central axis of the sleeve. The break gap of the isolating switch DS is adjustable. By adjusting the break gap of the isolating switch DS, the magnitude of the access impulse voltage can be adjusted; the grounding switch ES is used to connect to the grounding point.

[0046] Specifically, the break gap of the isolating switch DS can be manually adjusted. By controlling the break gap of the isolating switch DS, the magnitude of the incoming impulse voltage can be adjusted (when the incoming impulse voltage reaches the set gap breakdown voltage, the gap breaks down and discharges).

[0047] The grounding switch ES is the only grounding point for the conductor in the real GIS particle simulation test device 30 , and can achieve effective grounding of the conductor before the real GIS particle simulation test device 30 is disassembled.

[0048] Furthermore, in this embodiment, one end of the grounding component 33 is used to connect to the protective resistor 39, one end of the grounding component 33 is used to connect to one end of the protective resistor 39, the other end of the protective resistor 39 is connected to the armored transformer, and the protective resistor 39 cooperates with the fast protection device in the armored transformer to protect the AC power supply in the event of a fault.

[0049] Specifically, Figure 4 Taking the shown orientation as an example, the right side of the grounding component 33 is connected to the protective resistor 39. The protective resistor 39 cooperates with the fast protection device in the armored transformer with a fault clearing time of less than 10ms to protect the AC power supply (armored transformer) in the event of a fault, thereby ensuring the safety of the power frequency source under complex working condition test conditions (power frequency superimposed on impact). Among them, the real GIS particle simulation test device 30 can realize complex working condition simulation conditions of 1000kV impact superimposed on 500kV power frequency.

[0050] Continue to refer to Figure 1 In this embodiment, at least two observation ports and at least two test ports 311 are provided on the outer wall of the circuit breaker 31. The observation ports and the test ports 311 are arranged crosswise along the central axis of the circuit breaker 31. The two observation ports and the two test ports 311 are both connected to the cavity of the circuit breaker 31. The test ports 311 are used to install the built-in sensor 10.

[0051] Specifically, the two observation ports are respectively covered with observation covers, and the two test ports 311 are respectively covered with built-in sensor 10 covers.

[0052] The observation port and the test port 311 are spaced apart.

[0053] Continue to refer to Figure 5 Another embodiment provides an observation system 1, including a built-in sensor 10, an external sensor 20 and the above-mentioned true GIS particle simulation test device 30, the built-in sensor 10 is arranged in the circuit breaker 31 or in the conversion component 32; the external sensor 20 is arranged on the outer wall of the circuit breaker 31 or on the outer wall of the conversion component 32.

[0054] Specifically, the observation system 1 mainly adopts ultrasonic partial discharge-built-in optical sensor-image synchronous real-time measurement method to perform joint monitoring of particle photoelectric signals.

[0055] The built-in sensor 10 includes a built-in optical sensor 11 and a built-in ultra-high frequency sensor 12 , and the external sensor 20 includes an external ultrasonic sensor.

[0056] In this embodiment, the primary frequency of the ultrasonic signal generated by metal particle defects is concentrated in the 20-60 kHz range. The external ultrasonic sensor for detecting metal particles achieves highest detection accuracy when its resonant frequency is within the 30-50 kHz range. When using the TWAE-03 ultrasonic sensor, sensitivity is highest at a resonant frequency of 10 kHz. The sensor's sensitivity increases linearly in the 0-10 kHz frequency band, and fluctuates within a small range of approximately 70 dB in the 10-80 kHz frequency band. This indicates that the external ultrasonic sensor has good frequency response characteristics in this frequency band and is highly capable of capturing particle defect signals. In the test section of disconnector 321, an external ultrasonic sensor was installed on the outer wall of disconnector 321 and connected to an oscilloscope for ultrasonic partial discharge signal acquisition and real-time signal processing.

[0057] Among them, the built-in optical sensor 11 mainly uses fluorescent fiber sensing to detect ultraviolet radiation generated by partial discharge of particles; the fluorescent fiber is connected to ordinary single-mode fiber, and the single-mode fiber is connected to the silicon photomultiplier module to convert the optical signal into an electrical signal, and the signal is amplified and processed, and transmitted to the acquisition card through a coaxial cable to collect the electrical signal.

[0058] In this embodiment, the detection frequency band of the built-in UHF sensor 12 is 300 MHz-1.5 GHz, which is used to detect high-frequency electrical signals during discharge. The rear circuit is arranged in a substantially identical manner to the external ultrasonic sensor.

[0059] Continue to refer to Figure 5 In this embodiment, when the circuit breaker 31 is in the test section, the internal optical sensor 11 and the internal UHF sensor 12 are respectively installed on the internal sensor 10 cover plate of the two test ports 311, and are located on the side of the internal sensor 10 cover plate facing the test ports 311. The external ultrasonic sensor is installed on the outer wall of the circuit breaker 31.

[0060] When the conversion assembly 32 is in the test section, both observation ports 3211 of the isolating switch 321 are covered with internal sensor 10 covers. The internal optical sensor 11 and the internal UHF sensor 12 are respectively installed on the two internal sensor 10 covers, and are located on the side of the internal sensor 10 covers facing the observation ports 3211. The external ultrasonic sensor is installed on the outer wall of the isolating switch 321.

[0061] In an implementation where both detection openings 3221 of the busbar air chamber 322 are covered with built-in sensor 10 covers, the built-in optical sensor 11 and the built-in UHF sensor 12 are respectively disposed on the two built-in sensor 10 covers, and are disposed on the side of the built-in sensor 10 covers facing the detection openings 3221. The external ultrasonic sensor is disposed on the outer wall of the busbar air chamber 322.

[0062] Furthermore, in this embodiment, an external high-speed camera is provided on the observation cover, and the external high-speed camera is detachably connected to the observation cover. The external high-speed camera is used to collect optical images of the generation and movement of foreign matter and particle movement during the breaking process, and synchronizes the signal to the motion studio background for real-time image monitoring during the collection process, thereby realizing the synchronous collection and processing of particle characteristic signals in GIS.

[0063] During use, the high-speed camera triggers are set by applying a pressure signal to capture and record the motion characteristics of the metal particles. To capture clear images, sufficient light is required, with a single LED lamp power of no less than 500W.

[0064] To effectively capture the details of the rapid motion of metal particles under the influence of an electric field, a high-speed camera must have at least 5 megapixels and a frame rate of at least 2,000 frames per second at full resolution. To effectively observe the motion characteristics of small metal particles, observation covers are installed in pairs: one for high-speed camera photography and the other for LED fill light inside the cavity.

[0065] It should be noted that during the circuit breaker 31 test section, an external high-speed camera was installed on the inspection cover of the circuit breaker 31, on the side of the inspection cover facing away from the inspection opening 312. During the conversion assembly 32 test section, both inspection openings 3221 of the busbar air chamber 322 were covered with inspection covers, with an external high-speed camera installed on the side of one inspection cover facing away from the inspection opening 3221. An LED light was also installed on the side of the other inspection cover facing away from the inspection opening 3221.

[0066] Continue to refer to Figure 6 and Figure 7 During testing of the observation system 1 provided in this embodiment, 20 aluminum wires, each 5 mm long and 0.5 mm in diameter, were prepared. During the test section of the circuit breaker 31, 20 aluminum wires with a diameter of 0.5 mm were placed at the bottom of the cavity of the circuit breaker 31, below the fracture of the circuit breaker 31. After evacuating the cavity of the circuit breaker 31, pure sulfur hexafluoride (SF6) was filled to the rated pressure. A power frequency voltage was then applied to the circuit formed by the circuit breaker 31, the conversion assembly 32, the current transformer 34, and the grounding assembly 33 using a step-by-step pressurization method.

[0067] Continue to refer to Figure 6 When the voltage is raised to 115 kV, the high-speed camera records the images of the linear particle motion behavior. Figure 6 From A to D (i.e. Figure 6 Taking the position shown as an example, from left to right, images are recorded every 5 seconds at the same test location. Most of the linear particles stand upright and jump. Based on the images of their motion behavior, the particles move at a low amplitude at the bottom of the air chamber. After boosting the circuit voltage to 145kV and holding the voltage for 1 minute, the high-speed camera observed that all particles moved and left the bottom of the disconnector 321 (within the camera's observation range). At the same time, corresponding ultrasonic, fluorescent fiber, and UHF signals were detected. Continue with reference to Figure 7 , Figure 7 The three signal lines from top to bottom in the figure are the fluorescent fiber, built-in UHF, and external ultrasonic signals, respectively. During the measurement period shown in the figure, when the horizontal coordinates are approximately 12ms, 22ms, 31ms, and 42ms, the three signal waveforms all show regular peak fluctuations, indicating that the effective fluorescent fiber, built-in UHF, and external ultrasonic signals caused by the movement of the particles are detected synchronously, which verifies the effective synchronization of the observation system.

[0068] The observation system 1 provided in the present application includes a built-in sensor 10, an external sensor 20 and a true GIS particle simulation test device 30. The built-in sensor 10 is arranged in a circuit breaker 31 or in a conversion component 32; the external sensor 20 is arranged on the outer wall of the circuit breaker 31 or on the outer wall of the conversion component 32; the true GIS particle simulation test device 30 includes a circuit breaker 31, a conversion component 32, a grounding component 33 and a current transformer 34; the circuit breaker 31 is connected to the conversion component 32 through a first conductor 35, and the end of the conversion component 32 away from the first conductor 35 is connected to the current transformer 34 through a second conductor 36, and the end of the current transformer 34 away from the second conductor 36 is connected to the grounding component 33 through a third conductor 37, and the end of the grounding component 33 away from the third conductor 37 is connected to the circuit breaker 31 through a fourth conductor 38, so that the circuit breaker 31, the conversion component 32, the current transformer 34 and the grounding component 33 form a loop. ; The conversion component 32 includes a first state and a second state, and the first state and the second state can be converted to each other; the first state is used for the study of surface flashover discharge of particles; the second state is used to study the impact on particle discharge and the effectiveness of particle suppression measures; on the one hand, by setting the first state and the second state of the conversion component 32 to be convertible to each other, and setting the built-in sensor 10 and the external sensor 20 in the real GIS particle simulation test device 30, thereby, in the metal foreign body discharge simulation test, the discharge caused by particles in the GIS can be reliably observed, and effective particle detection and suppression measures can be formulated to reduce the failure rate of GIS particle discharge and avoid excessive maintenance; at the same time, material, human and financial resources are saved to ensure the safe and stable operation of the power system; on the other hand, by setting the real GIS particle simulation test device 30, compared with the scaled model, it is equivalent to the actual equipment, which narrows the difference between the experimental research and the actual GIS in the generation of particles and their impact on insulation under operating conditions.

[0069] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0070] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A real GIS particle simulation test device, characterized by: Including circuit breakers, switching components, grounding components and current transformers; The circuit breaker is connected to the conversion assembly via a first conductor, an end of the conversion assembly remote from the first conductor is connected to the current transformer via a second conductor, an end of the current transformer remote from the second conductor is connected to the grounding assembly via a third conductor, and an end of the grounding assembly remote from the third conductor is connected to the circuit breaker via a fourth conductor, so that the circuit breaker, the conversion assembly, the current transformer, and the grounding assembly form a loop; the conversion assembly includes a first state and a second state, and the first state and the second state are convertible between each other; The first state is used for the study of particle surface flashover discharge; The second state is used to study the effect on particle discharge and the effectiveness of particle suppression measures; The conversion assembly includes an isolating switch and a busbar gas chamber, one end of the isolating switch is connected to the busbar gas chamber, the other end of the isolating switch is connected to the first conductor, and the end of the busbar gas chamber away from the isolating switch is connected to the second conductor; When the conversion assembly is in the first state, the break of the disconnector is in a vertical state, and the bottom end of the break in the vertical state is a horizontal insulating basin; When the conversion assembly is in the second state, the break of the isolating switch is in a horizontal state.

2. The real GIS particle simulation test device according to claim 1 is characterized by: At least two observation ports and at least two test openings are provided on the outer wall of the circuit breaker, wherein the observation ports and the test openings are arranged crosswise along the central axis of the circuit breaker, and both the observation ports and the test openings are in communication with the cavity of the circuit breaker; The test port is used to install a built-in sensor.

3. The real GIS particle simulation test device according to claim 1 is characterized in that: At least two observation openings are provided on the outer wall of the isolating switch. The two observation openings are arranged opposite to each other and are both communicated with the cavity of the isolating switch.

4. The real GIS particle simulation test device according to claim 3 is characterized by: At least two detection openings are provided on the outer wall of the busbar air chamber. The two detection openings are arranged opposite to each other and are both communicated with the busbar air chamber.

5. The real GIS particle simulation test device according to claim 1 is characterized in that: The grounding assembly includes a bushing and an isolating grounding switch. The top end of the isolating grounding switch is connected to the bushing, and the bottom end of the isolating grounding switch is connected to the current transformer through the third conductor.

6. The real GIS particle simulation test device according to claim 5, characterized in that: The isolating and grounding switch includes an isolating switch and a grounding switch, the isolating switch and the grounding switch are arranged along the central axis of the bushing, and the break gap of the isolating switch is adjustable. By adjusting the break gap of the isolating switch, the magnitude of the access impulse voltage can be adjusted; The grounding switch is used to be connected to a grounding point.

7. The real GIS particle simulation test device according to claim 1 is characterized by: One end of the grounding component is used to connect to one end of the protective resistor, and the other end of the protective resistor is connected to the armored transformer. The protective resistor cooperates with the fast protection device in the armored transformer to protect the AC power supply in the event of a fault.

8. An observation system, characterized in that: The device comprises a built-in sensor, an external sensor and a real GIS particle simulation test device according to any one of claims 1 to 7, wherein the built-in sensor is arranged in the circuit breaker or in the conversion component; The external sensor is arranged on the outer wall of the circuit breaker or on the outer wall of the conversion assembly.

Images