Detection device and method for simulating excitation phase voltage of metal particles in GIS equipment

Abstract

The invention relates to a detection device and method for simulating excitation phase voltage of metal particles in GIS (Gas Insulated Switchgear) equipment, and the device comprises an element cavity, a vibration applying mechanism, a vibration detection mechanism and a voltage phase oscilloscope, the vibration detection mechanism measures a mechanical vibration signal of the element cavity and converts the mechanical vibration signal into an electric signal; and the voltage phase oscilloscope displays the voltage phase at the excitation moment of the metal particles. According to the device, the amplitude and action time of mechanical vibration are accurately controlled through the vibration applying mechanism, and the dynamic vibration environment of actual operation of GIS equipment is simulated; meanwhile, the vibration detection mechanism is combined with an external trigger mode of a voltage phase oscilloscope, millisecond-level synchronous capture of the moment of vibration excitation of metal particles and an alternating current voltage phase is achieved, excitation phase data of the metal particles can be accurately obtained, and the association rule of the initial charge quantity and the motion trail of the metal particles is deeply analyzed. And positioning of insulation weak points of the GIS equipment and optimization of a protection strategy are guided.

Description

Technical Field

[0001] The present application relates to the technical field of insulation detection of power equipment, and in particular to a device and method for detecting phase voltage of a simulated metal particle excitation in GIS equipment. Background Art

[0002] With the rapid development of ultra-high voltage (UHV) projects in recent years, gas-insulated metal-enclosed switchgear (GIS) has become widely used in power systems due to its significant advantages in space utilization, reliability, and ease of maintenance. Its reliability is directly related to the safe operation of the power grid. Currently, failures caused by insulation damage in GIS at voltage levels of 550 kV and above have become one of the most important insulation issues for GIS. The majority of GIS insulation failures are caused by metal particle contamination, and nearly 36% of these failures occur within seconds to minutes after switching operations.

[0003] The AC voltage phase at the moment a particle takes off typically directly determines its initial charge, which in turn influences the particle's trajectory and discharge characteristics under the action of the electric field. However, while existing detection technologies can measure the amplitude of GIS mechanical vibrations, they cannot detect the voltage phase at the moment the GIS vibration excites the metal particles. Therefore, existing GIS metal particle motion models typically set the voltage phase at the moment of particle excitation to a random value over several decades. This results in a persistent lack of phase parameters for metal particle force analysis, leading to significant deviations between predicted results and measured data. This makes it difficult for operations and maintenance personnel to accurately predict hazardous areas for particle motion and develop targeted insulation protection strategies.

[0004] Therefore, there is an urgent need for a device that can accurately measure the instantaneous voltage phase of metal particles excited by GIS operating vibration, so as to achieve accurate measurement of the instantaneous voltage phase of vibration excitation and improve the safety of power equipment. Summary of the Invention

[0005] To overcome the above-mentioned deficiencies of the prior art, the present application provides a device and method for detecting phase voltage of metal particles excited in simulated GIS equipment, which specifically adopts the following technical solutions:

[0006] A phase voltage detection device simulating the excitation of metal particles in GIS equipment, comprising a component cavity, a vibration applying mechanism, a vibration detecting mechanism and a voltage phase oscilloscope.

[0007] The component cavity is used to simulate the cavity structure of a closed combination electrical appliance, and metal particles are built into the component cavity;

[0008] The output end of the vibration applying mechanism and the input end of the vibration detecting mechanism respectively abut against the outer side wall of the component cavity, the vibration applying mechanism applies mechanical vibration to the component cavity, and the vibration detecting mechanism measures the mechanical vibration signal of the component cavity and converts it into an electrical signal;

[0009] The voltage phase oscilloscope is connected to the vibration detection mechanism, and the voltage phase at the moment of metal particle excitation is displayed through the voltage phase oscilloscope.

[0010] Optional: The vibration applying mechanism includes a vibration exciter, a voltage regulator and a first power supply, wherein the vibration part of the vibration exciter abuts the outer wall of the element cavity, and the first power supply is connected to the voltage regulator, and outputs different levels of control voltage to the vibration exciter through the voltage regulator, driving the vibration part of the vibration exciter to apply corresponding mechanical vibration to the outer wall of the element cavity.

[0011] Optional: The vibration detection mechanism includes an acceleration sensor, a signal conditioning device and a second power supply, the acceleration sensor abuts the outer wall of the element cavity, and the second power supply provides power to the signal conditioning device; the signal conditioning device generates a stable constant current source through an internal voltage stabilization circuit and transmits it to the acceleration sensor, and the signal conditioning device filters and amplifies the analog signal of the acceleration sensor, and the signal conditioning device transmits the processed signal of the acceleration sensor to the voltage phase oscilloscope.

[0012] Optionally: the device also includes a high-voltage power supply control mechanism and a pressurized sleeve, the pressurized sleeve is installed to one end of the element cavity, and the pressurized sleeve is connected to the high-voltage electrode inside the element cavity; the high-voltage power supply control mechanism is connected to the pressurized sleeve, and an industrial frequency AC voltage is applied to the high-voltage electrode inside the element cavity through the high-voltage power supply control mechanism.

[0013] Optional: The voltage phase oscilloscope includes a first input channel and a second input channel, the first input channel receives the voltage division signal of the high-voltage power supply control mechanism; the second input channel is connected to the output signal of the signal conditioning device, and the second input channel is configured as an external trigger mode, and the trigger threshold setting range of the second input channel is 0%-100% of the peak value of the corresponding signal of the acceleration sensor.

[0014] Optionally, a first contact position is provided on the outer side wall of the element cavity, and the acceleration sensor abuts against the first contact position, wherein the first contact position is a position on the outer side wall corresponding to an area where metal particles are densely distributed under rated industrial frequency AC voltage.

[0015] Optionally, a coupling agent is provided in the contact gap between the acceleration sensor and the outer side wall of the element cavity.

[0016] Optionally, a vibration signal analysis module is provided in the voltage phase oscilloscope, and the vibration signal analysis module is used to perform time domain alignment and wavelet transform, and mark the voltage phase value at the triggering moment.

[0017] In addition, the present application also discloses a method for detecting phase voltage of metal particles excited in simulated GIS equipment. The method uses the above-mentioned device for detecting phase voltage of metal particles excited in simulated GIS equipment. The method includes the following steps:

[0018] Determine the detection position of the vibration detection mechanism at different voltage levels through a preliminary experimental method;

[0019] Controlling the vibration applying mechanism to apply mechanical vibration to the component cavity, and controlling the application of a preset power frequency AC voltage to the component cavity;

[0020] Detecting the mechanical vibration signal of the current position of the component cavity by the vibration detection mechanism, and amplifying and outputting it to the voltage phase oscilloscope;

[0021] When the voltage phase oscilloscope receives a mechanical vibration signal, it captures the instantaneous phase of the current power frequency AC voltage.

[0022] Optional: The specific steps of the preliminary experimental method include:

[0023] evenly distributing metal particles into the interior of the component cavity;

[0024] Applying power frequency AC voltages of different voltage levels to the component cavity respectively, and maintaining the current voltage for 30 minutes;

[0025] Then, the application of the industrial frequency AC voltage of the corresponding voltage level is stopped, and the area where the metal particles are densely distributed at the current voltage level is recorded, which is the detection position of the vibration detection mechanism at the corresponding voltage level.

[0026] Beneficial effects

[0027] The technical solution of this application has the following beneficial effects:

[0028] The present application simulates the phase voltage detection device for metal particle excitation in GIS equipment, which accurately controls the amplitude and action time of mechanical vibration through a vibration application mechanism, simulates the dynamic vibration environment of actual operation of GIS equipment, and ensures that the experimental conditions are highly consistent with the actual working conditions; at the same time, the vibration detection mechanism converts the mechanical vibration signal into a trigger pulse with a high signal-to-noise ratio in real time, and combines it with the external trigger mode of the voltage phase oscilloscope to achieve millisecond-level synchronous capture of the vibration-excited metal particles and the AC voltage phase; this method significantly improves the engineering applicability of the detection results, breaks through the limitations of the traditional random phase assumption, can accurately obtain the metal particle excitation phase data, and deeply analyze the correlation between the initial charge of the metal particles and the motion trajectory, thereby guiding the positioning of insulation weak points of GIS equipment and the optimization of protection strategies, effectively reducing the risk of insulation failure caused by particle migration after switching operation, and improving the reliability of power grid operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a structural diagram of a phase voltage detection device simulating metal particle excitation in GIS equipment in an embodiment of the present application.

[0030] Figure 2 This is a schematic diagram of the low voltage ride-through process of a wind turbine in an embodiment of the present application.

[0031] The specific meanings of the reference numerals in the accompanying drawings are:

[0032] 1-element cavity; 2-high-voltage electrode; 3-pressurized sleeve; 4-insulator; 5-transparent observation window; 6-metal particles; 7-first power supply; 8-voltage regulator; 9-vibration exciter; 10-accelerometer; 11-signal conditioning equipment; 12-voltage phase oscilloscope; 13-high-voltage power supply control mechanism. DETAILED DESCRIPTION

[0033] The present application will be further described below in conjunction with the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application and are not intended to limit the scope of protection of the present application. It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application.

[0034] like Figure 1 As shown, this embodiment specifically discloses a device for detecting phase voltage of metal particles in simulated GIS equipment, the device comprising a component cavity 1, a vibration applying mechanism, a vibration detecting mechanism and a voltage phase oscilloscope 12.

[0035] The component cavity 1 is used to simulate the cavity structure of a closed-type switchgear (i.e., a gas-insulated metal-enclosed switchgear), and is internally filled with metal particles 6. To realistically simulate the actual operating conditions of GIS equipment, the component cavity 1 typically contains 0.4–0.6 MPa of SF6 insulating gas. SF6, as an insulating and arc-extinguishing medium, is crucial for ensuring reliable operation of the equipment in high-voltage environments. Furthermore, the component cavity 1 of this embodiment can be adjusted to the actual GIS equipment model. For example, GIS equipment of different voltage levels (e.g., 110 kV, 220 kV, and 550 kV) can be matched with a component cavity 1 of corresponding size. This is to simulate actual operating conditions and reduce the influence of external factors on the measurement results during operation. In this embodiment, to ensure a realistic simulation of the GIS device, a high-voltage electrode 2 and an insulator 4 are also provided inside the component cavity 1. The high-voltage electrode 2 is the core component in the GIS device that conducts and carries high voltage. It is responsible for transmitting electrical energy from the power supply end to the load end, while maintaining the electric field distribution inside the device to ensure the safe transmission of high-voltage electrical energy. The insulator 4 is a key insulating component in the GIS device that isolates the high-voltage electrode 2 from the component cavity 1. It also supports the high-voltage electrode 2 and maintains the gas sealing inside the GIS device.

[0036] More specifically, the vibration applying mechanism described in the embodiment of the present application is the core component that applies mechanical vibration to the component cavity 1, which is used to simulate the vibration state of the actual GIS equipment during operation. The vibration detection mechanism serves as a detection device for the mechanical vibration signal, providing a trigger signal for the subsequent voltage phase oscilloscope 12 measurement. The output end of the vibration applying mechanism and the input end of the vibration detection mechanism respectively abut the outer wall of the component cavity 1. The vibration applying mechanism applies mechanical vibration to the component cavity 1, and the vibration detection mechanism measures the mechanical vibration signal of the component cavity 1 and converts it into an electrical signal.

[0037] In detail, the vibration applying mechanism in this embodiment includes a vibration exciter 9, a voltage regulator 8 and a first power supply 7. The vibrating part of the vibration exciter 9 abuts the outer wall of the element cavity 1, and the first power supply 7 is connected to the voltage regulator 8. The voltage regulator 8 outputs different levels of control voltage to the vibration exciter 9, thereby driving the vibrating part of the vibration exciter 9 to apply mechanical vibration to the outer wall of the element cavity 1. Subsequently, the mechanical vibration is transmitted to the position of the metal particles 6 through the side wall of the element cavity 1, thereby exciting the metal particles 6 to vibrate.

[0038] It should be noted that the voltage regulator 8 in this embodiment has a multi-stage voltage regulation function. By changing the input voltage of the vibration exciter 9, it can achieve control of the amplitude-time characteristics of mechanical vibration. Generally, the output voltage of the voltage regulator 8 is adjustable within a range of 0–380V, with an adjustment accuracy of ±1V. The vibration exciter 9 can be driven by electromagnetic impact, which generates pulsed mechanical excitation by controlling the on and off of the electromagnet, causing the vibrating part to impact the outer wall of the GIS equipment cavity, generating vibration. The acceleration signal of the vibration exciter 9 can be adjusted within a range of 0–80g, and the action time is controlled at the millisecond level.

[0039] Furthermore, the vibration detection mechanism in this embodiment includes an acceleration sensor 10, a signal conditioning device 11, and a second power supply. The acceleration sensor 10 abuts the outer wall of the element cavity 1, and the second power supply provides power to the signal conditioning device 11. The signal conditioning device 11 generates a stable constant current source through an internal voltage stabilization circuit and transmits it to the acceleration sensor 10, and the signal conditioning device 11 filters and amplifies the analog signal of the acceleration sensor 10. The signal conditioning device 11 transmits the processed signal of the acceleration sensor 10 to the voltage phase oscilloscope 12. The above-mentioned vibration detection mechanism realizes high-fidelity transmission of weak vibration signals through the coordinated operation of the acceleration sensor 10 and the signal conditioning device 11.

[0040] The acceleration sensor 10 of this embodiment has a range of ±250g and a sensitivity of 20.6mV / (m·s -2 ), with a resolution of 0.04g, effectively capturing minute vibrations on the surface of the component cavity 1. The acceleration sensor 10 is fixed to a preset position on the outer wall of the component cavity 1 via a coupling agent. It should be noted that in this embodiment, the preset position can be determined through preliminary experimental methods, and is generally selected as the preset position in an area with a dense distribution of metal particles 6 under different levels of power frequency AC voltage. In this embodiment, a transparent observation window 5 is provided at one end of the component cavity, through which the distribution of the metal particles 6 within the component cavity 1 can be visually obtained.

[0041] Furthermore, the signal conditioning device 11 described in this embodiment can adopt an IEPE constant current adapter (Integrated Electronics Piezoelectric), which receives the weak electrical signal generated by the acceleration sensor 10, amplifies and conditions the signal, and has a frequency response of 0.3Hz-100kHz and an error of ≤±1.5%. The signal conditioning device 11 effectively suppresses noise interference and ensures the signal-to-noise ratio of the trigger signal.

[0042] Furthermore, in this embodiment, the voltage phase oscilloscope 12 is connected to the vibration detection mechanism, and the voltage phase at the moment when the metal particles 6 are excited is displayed by the voltage phase oscilloscope 12 .

[0043] Specifically, the voltage phase oscilloscope 12 of this embodiment adopts a dual-channel synchronous acquisition mode, that is, the voltage phase oscilloscope 12 includes a first input channel and a second input channel. The first input channel receives the voltage division signal of the high-voltage power supply control mechanism 13, and is configured to directly input the voltage division signal of the high-voltage power supply control mechanism 13. Generally, GIS equipment (gas-insulated metal-enclosed switchgear) is at high voltage during operation. In order to monitor its related electrical parameters, the high voltage signal needs to be divided and then connected to the first input channel of the voltage phase oscilloscope 12. Therefore, devices such as capacitor voltage dividers and resistor-capacitor voltage dividers are usually used to achieve voltage division. For example, a capacitor voltage divider is composed of a high-voltage arm capacitor and a low-voltage arm capacitor. By reasonably designing the capacitor ratio, the high voltage of the GIS equipment is proportionally converted into a low-voltage signal suitable for the input of the voltage phase oscilloscope 12. The signal is then transmitted to the first input channel via a shielded cable, etc., to ensure the stability and anti-interference performance of the signal transmission. The voltage phase oscilloscope 12 continuously monitors the amplitude changes of the voltage-divided signal inputted by the first input channel. When the signal amplitude exceeds the current range, it automatically triggers the range switching mechanism and reselects the appropriate range to ensure measurement accuracy and reliability. The second input channel is connected to the output signal of the signal conditioning device 11 and is configured in external trigger mode. The trigger threshold setting range of the second input channel is 0%–100% of the corresponding signal peak value of the acceleration sensor 10.

[0044] In addition, the voltage phase oscilloscope 12 of this embodiment is provided with a vibration signal analysis module, which can be used to perform time domain alignment and wavelet transform, and mark the voltage phase value at the triggering moment. The purpose of performing time domain alignment is to make the input signals at different times or from different sources comparable and consistent on the time axis. The wavelet transform is performed for signal denoising and feature extraction. The vibration signal analysis module can decompose the input signal into different scale spaces. For example, noise is usually in the high-frequency part, and the real signal is mostly in the low-frequency part. Then, by setting a threshold, the high-frequency noise component is filtered out to achieve denoising; in addition, by analyzing the local maximum or detail coefficient of the wavelet coefficient, the characteristics of the signal in the time-frequency domain can be extracted, which helps to identify transient faults and dynamic changes.

[0045] Furthermore, the above-mentioned device of this embodiment also includes a high-voltage power supply control mechanism 13 and a pressurized sleeve 3, wherein the pressurized sleeve 3 is installed at one end of the component cavity 1 and is connected to the high-voltage electrode 2 inside the component cavity 1. The pressurized sleeve 3 is used to lead the high-voltage electrode 2 inside the component cavity 1 to the outside, while bearing high voltage, mechanical loads and environmental stresses, ensuring electrical insulation and sealing. The high-voltage power supply control mechanism 13 is connected to the pressurized sleeve 3. The high-voltage power supply control mechanism 13 can output an AC voltage in the range of 0–300 kV, with the specific output voltage being adjustable and the voltage stability being ≤±0.5%. The high-voltage power supply control mechanism 13 can apply a stable AC voltage to the high-voltage electrode 2 inside the component cavity 1. In addition, the high-voltage power supply control mechanism 13 generally has an overvoltage protection function, which can automatically cut off the power supply when a discharge is detected inside the component cavity 1 to protect the safety of the equipment.

[0046] This embodiment utilizes the aforementioned detection device, leveraging the temporal correlation between vibration signals and voltage phases, to precisely lock onto the voltage phase at the moment metal particles 6 are excited by GIS equipment operating vibrations. This embodiment utilizes the synergistic effect of the acceleration sensor 10 and the external triggering mode of the voltage phase oscilloscope 12 to convert the mechanical vibration signal into a trigger pulse in real time. This in turn triggers the voltage phase oscilloscope 12 to synchronously capture the instantaneous phase of the metal particles 6 at the moment of excitation under the current AC power frequency voltage. This solves the problem of unmeasurable excitation phases in conventional methods.

[0047] In addition, based on the above-mentioned device for detecting the phase voltage of the metal particles 6 excited in the simulated GIS device, the present application also discloses a corresponding method for detecting the phase voltage of the metal particles 6 excited in the simulated GIS device, the method comprising the following steps:

[0048] (1) Determine the detection position of the vibration detection mechanism at different voltage levels through preliminary experimental methods:

[0049] First, metal particles 6 are evenly dispersed inside the component cavity 1; then, industrial frequency AC voltages of different voltage levels are applied to the component cavity 1, and the current voltage is maintained for 30 minutes; then, the application of the industrial frequency AC voltage of the corresponding voltage level is stopped, and the area with dense distribution of metal particles 6 at the current voltage level is recorded, which is the detection position of the vibration detection mechanism at the corresponding voltage level.

[0050] (2) Then, based on the determined detection position, the acceleration sensor 10 of the vibration detection mechanism is abutted against the corresponding outer wall position of the component cavity 1 using a coupling agent. Generally, the thickness of the coupling agent coating is ≤0.1 mm to ensure the efficiency of vibration signal transmission.

[0051] (3) In order to truly simulate the operating conditions of actual GIS equipment, 0.5 MPa SF6 gas can be filled into the component cavity 1 to simulate the actual insulation environment.

[0052] (4) Then, the output end of the acceleration sensor 10 is connected to the input end of the IEPE constant current adapter. The output end of the IEPE constant current adapter is connected to the second input channel of the voltage phase oscilloscope 12. The high-voltage power supply control mechanism 13 is connected to the first input channel of the voltage phase oscilloscope 12 (generally, the high-voltage power supply control mechanism 13 will be provided with a low-voltage signal interface, and the low-voltage signal interface can be connected to the voltage phase oscilloscope 12).

[0053] (5) The vibration applying mechanism is then controlled to apply standard mechanical vibration, and the IEPE constant current adapter is adjusted so that the output trigger pulse amplitude is 1.2 times the trigger threshold of the voltage phase oscilloscope 12. A preset power frequency AC voltage is applied to the component cavity 1. For example, if the preset power frequency AC voltage is set to 150 kV, the voltage is increased to 150 kV at a rate of 5 kV / s and maintained for 60 seconds to stabilize the electric field. At the same time, the vibration exciter 9 can be controlled by the voltage regulator 8 to generate a mechanical shock corresponding to the preset voltage.

[0054] (6) The mechanical vibration signal at the detection position of the component cavity 1 is detected by the vibration detection mechanism, and the amplified signal is output to the voltage phase oscilloscope 12. When the acceleration sensor 10 detects the vibration signal, the IEPE constant current adapter outputs a trigger pulse to the second input channel to start the voltage phase oscilloscope 12 for recording.

[0055] (7) When the voltage phase oscilloscope 12 receives a mechanical vibration signal, it will capture the instantaneous phase of the current industrial frequency AC voltage: the first input channel captures the industrial frequency voltage waveform in real time and calculates the instantaneous phase (accuracy ±0.5°) based on the zero crossing point; and the vibration signal analysis module performs time domain alignment (error <1μs), automatically marks and stores the voltage phase value corresponding to the trigger moment (such as 90°±0.5°), and supports data export and statistical analysis.

[0056] The above detection method can accurately measure the instantaneous voltage phase of metal particles 6 excited by the operating vibration of GIS equipment in different positions and shapes, providing accurate data for the study of the charging mechanism, force type, discharge characteristics and motion characteristics of metal particles 6, which is helpful for studying the influence of the motion characteristics of metal particles 6 on GIS insulation characteristics.

[0057] Furthermore, in order to verify the effect of the above-mentioned device and method, the present embodiment adopts metal particles of different specifications (particle radius is 0.3mm, 0.5mm, 0.7mm) to respectively test the vibration intensity of different levels (vibration intensity 20m / s 2 、30m / s2 , 40m / s 2 , 50m / s 2 ) and the results are as follows: Figure 2 As shown, it can be seen that by applying different levels of vibration intensity (vibration intensity 20m / s 2 、30m / s 2 , 40m / s 2 , 50m / s 2 ) can measure the electric field phase at the moment of excitation of metal particles of different specifications (particle radius is 0.3mm, 0.5mm, 0.7mm).

[0058] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are for description only and do not represent the advantages and disadvantages of the embodiments.

[0059] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass 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 other identical elements in the process, method, article, or apparatus comprising the element.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another device, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0061] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed across multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0062] In addition, all functional units in the embodiments of the present application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the above-mentioned integrated units can be implemented in the form of hardware or in the form of hardware plus software functional units.

[0063] Those skilled in the art will understand that all or part of the steps of implementing the above-mentioned method embodiment can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above-mentioned method embodiment; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM), magnetic disks or optical disks, and other media that can store program codes.

[0064] Alternatively, if the above-mentioned integrated unit of the present application is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a device (which can be a terminal or platform, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROMs, magnetic disks or optical disks.

[0065] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A phase voltage detection device for simulating metal particle excitation in GIS equipment, characterized in that: The device includes a component cavity, a vibration applying mechanism, a vibration detecting mechanism and a voltage phase oscilloscope. The component cavity is used to simulate the cavity structure of a closed combination electrical appliance, and metal particles are built into the component cavity; The output end of the vibration applying mechanism and the input end of the vibration detecting mechanism respectively abut against the outer side wall of the component cavity, the vibration applying mechanism applies mechanical vibration to the component cavity, and the vibration detecting mechanism measures the mechanical vibration signal of the component cavity and converts it into an electrical signal; The voltage phase oscilloscope is connected to the vibration detection mechanism, and the voltage phase at the moment of metal particle excitation is displayed through the voltage phase oscilloscope.

2. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 1, characterized in that: The vibration applying mechanism includes a vibration exciter, a voltage regulator and a first power supply, wherein the vibration part of the vibration exciter abuts the outer wall of the element cavity, and the first power supply is connected to the voltage regulator, and outputs different levels of control voltage to the vibration exciter through the voltage regulator, driving the vibration part of the vibration exciter to apply corresponding mechanical vibration to the outer wall of the element cavity.

3. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 1, characterized in that: The vibration detection mechanism includes an acceleration sensor, a signal conditioning device and a second power supply. The acceleration sensor abuts the outer wall of the element cavity, and the second power supply provides power to the signal conditioning device. The signal conditioning device generates a stable constant current source through an internal voltage stabilization circuit and transmits it to the acceleration sensor, and the signal conditioning device filters and amplifies the analog signal of the acceleration sensor. The signal conditioning device transmits the processed signal of the acceleration sensor to the voltage phase oscilloscope.

4. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 3, characterized in that: It also includes a high-voltage power supply control mechanism and a pressurized sleeve, which is installed to one end of the element cavity and connected to the high-voltage electrode inside the element cavity; the high-voltage power supply control mechanism is connected to the pressurized sleeve, and an industrial frequency AC voltage is applied to the high-voltage electrode inside the element cavity through the high-voltage power supply control mechanism.

5. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 4, characterized in that: The voltage phase oscilloscope includes a first input channel and a second input channel. The first input channel receives the voltage division signal of the high-voltage power supply control mechanism; the second input channel is connected to the output signal of the signal conditioning device, and the second input channel is configured in an external trigger mode. The trigger threshold setting range of the second input channel is 0%-100% of the peak value of the corresponding signal of the acceleration sensor.

6. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 3, characterized in that: A first contact position is provided on the outer side wall of the element cavity, and the acceleration sensor abuts against the first contact position, wherein the first contact position is a position on the outer side wall corresponding to an area where metal particles are densely distributed under rated power frequency AC voltage.

7. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 6, characterized in that: A coupling agent is provided in the contact gap between the acceleration sensor and the outer side wall of the element cavity.

8. The device for detecting phase voltage of metal particles excited in simulated GIS equipment according to claim 1, characterized in that: The voltage phase oscilloscope is provided with a vibration signal analysis module, which is used to perform time domain alignment and wavelet transformation, and mark the voltage phase value at the triggering moment.

9. A method for detecting phase voltage by simulating metal particle excitation in GIS equipment, characterized in that: The method uses the phase voltage detection device for simulating metal particle excitation in GIS equipment according to any one of claims 1 to 8, and the method comprises the following steps: Determine the detection position of the vibration detection mechanism at different voltage levels through a preliminary experimental method; Controlling the vibration applying mechanism to apply mechanical vibration to the component cavity, and controlling the application of a preset power frequency AC voltage to the component cavity; Detecting the mechanical vibration signal of the current position of the component cavity by the vibration detection mechanism, and amplifying and outputting it to the voltage phase oscilloscope; When the voltage phase oscilloscope receives a mechanical vibration signal, it captures the instantaneous phase of the current power frequency AC voltage.

10. The method for detecting phase voltage of metal particle excitation in simulated GIS equipment according to claim 9, characterized in that: The specific steps of the preliminary experimental method include: evenly distributing metal particles into the interior of the component cavity; Applying power frequency AC voltages of different voltage levels to the component cavity respectively, and maintaining the current voltage for 30 minutes; Then, the application of the industrial frequency AC voltage of the corresponding voltage level is stopped, and the area where the metal particles are densely distributed at the current voltage level is recorded, which is the detection position of the vibration detection mechanism at the corresponding voltage level.

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