Partial discharge fault recording and positioning system for alternating current withstand voltage test

Abstract

The utility model relates to a partial discharge fault recording and positioning system for an alternating current withstand voltage test. The system comprises a plurality of sensors which are respectively arranged at corresponding acquisition positions of GIS equipment; the signal acquisition cards are provided with data channel groups, each data channel group comprises at least one data acquisition channel, and each data acquisition channel is used for receiving the input signal transmitted by the corresponding sensor and outputting an acquisition signal; the signal acquisition case is provided with at least one slot, and the slot is used for inserting a signal acquisition card so as to receive and output each acquisition signal; and the computer equipment is connected with the signal acquisition case and is used for receiving the acquisition signal to determine the partial discharge position of the GIS equipment. According to the invention, through multiple signal channels, when partial discharge occurs, fault positioning can be automatically carried out, and the discharge position of an insulation breakdown fault can be rapidly positioned.

Description

Technical Field

[0001] The present application relates to the technical field of fault location, and in particular to a local discharge fault recording and location system for an AC withstand voltage test. Background Art

[0002] AC withstand voltage test is an important item specified in the on-site acceptance test procedures for GIS (Gas Insulated Switchgear). The test can effectively detect insulation contamination, installation errors, geometric dimension deviations, damage and foreign matter left in the packaging, transportation, installation and commissioning process of GIS equipment. It is the most rigorous, effective and direct test method. It has absolute significance for judging whether the equipment can be put into system operation and is an important link to ensure the smooth commissioning of GIS into the power system.

[0003] However, in the traditional scheme, if discharge or breakdown occurs during the test, it will be difficult to judge the exact location of the fault by human ears alone, and it is easy to make misjudgments, which will waste manpower and material resources and cause unnecessary damage to the equipment. Utility Model Content

[0004] Based on this, it is necessary to provide an AC withstand voltage test partial discharge fault recording and locating system that can quickly locate the discharge position of the insulation breakdown fault.

[0005] An AC withstand voltage test partial discharge fault recording and locating system, comprising:

[0006] Multiple sensors, each sensor is set at the corresponding collection position of the GIS equipment;

[0007] A plurality of signal acquisition cards, each of which has a data channel group, each of which includes at least one data acquisition channel, each of which is used to receive an input signal transmitted by a corresponding sensor and output an acquisition signal;

[0008] A signal acquisition chassis, wherein the signal acquisition chassis is provided with at least one slot, wherein the slot is used to insert a signal acquisition card to receive and output each acquisition signal;

[0009] The computer equipment is connected to the signal acquisition chassis and is used to receive the acquisition signal to determine the partial discharge position of the GIS equipment.

[0010] In one embodiment, the signal acquisition card is a sound and vibration input module; the sensor includes a sound sensor and a vibration sensor.

[0011] In one of the embodiments, the data acquisition channel has an anti-aliasing filter built in; the data acquisition channel is used to perform signal conditioning on the input signal, and the conditioned signal is output after being filtered through the anti-aliasing filter after analog-to-digital conversion.

[0012] In one embodiment, the number of data acquisition channels is 32.

[0013] In one embodiment, the signal acquisition card is an I / O module.

[0014] In one embodiment, the sensor comprises a piezoelectric ceramic sensor.

[0015] In one embodiment, the collection location is a key part of the GIS equipment; the key part includes the isolating switch, the circuit breaker air chamber and the air chamber connection.

[0016] In one embodiment, the sensor is configured to be secured in the form of a strap.

[0017] In one embodiment, the sensors are arranged at equal intervals; and the interval between adjacent sensors is less than or equal to 1000 mm.

[0018] In one embodiment, the signal acquisition chassis is a bus-powered USB chassis.

[0019] In the above-mentioned AC withstand voltage test partial discharge fault recording and locating system, each sensor is respectively arranged at the corresponding collection position of the GIS equipment, through a signal acquisition card with a data channel group and a signal acquisition chassis for inserting multiple signal acquisition cards, wherein the data channel group includes at least one data acquisition channel, each data acquisition channel is used to receive the input signal transmitted by the corresponding sensor, output the acquisition signal, and then the computer device receives the acquisition signal to determine the partial discharge position of the GIS equipment; the present application can set up multiple signal channels, and when partial discharge occurs, the fault location can be automatically performed, and the discharge position of the insulation breakdown fault can be quickly located. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is an AC withstand voltage test partial discharge fault recording and locating system according to one embodiment;

[0022] Figure 2 A structural block diagram of a computer device according to an embodiment;

[0023] Figure 3 The present invention is a partial discharge fault recording and locating system for AC withstand voltage test in a specific implementation manner. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0027] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0028] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0029] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0030] At present, ultrasonic partial discharge detection technology is used to locate faults in on-site AC withstand voltage tests of GIS equipment. Multiple ultrasonic sensors are set up in the test to receive ultrasonic signals that appear when GIS discharges and breaks down. The fault is then located by measuring the amplitude of the ultrasonic signal and the time difference between the ultrasonic signals.

[0031] Take the sensor at one of the positions of the traditional discharge fault location device as an example. The principle of this device is to start the indicator light by measuring the amplitude of the ultrasonic signal. The higher the amplitude, the more lights will light up, thus determining the approximate location of the fault. However, the fault amplitude of the traditional scheme is determined by the conduction value of the electron tube voltage, which has a large deviation. The sensor uses a piezoelectric sheet with low sensitivity. It will only react when the discharge amplitude is relatively large, and can only perform approximate positioning.

[0032] In addition, in the traditional solution, if discharge or breakdown occurs during the test, it will be difficult to judge the exact location of the fault by human ears alone, and it is easy to make misjudgments, which will waste manpower and material resources and cause unnecessary damage to the equipment. In addition, repeated opening of the cover for inspection and repeated testing will not only waste a lot of manpower and material resources, but also cause air chamber pollution and cumulative damage to epoxy resin insulation materials caused by repeated pressure resistance, which will have a significant negative impact on the safety and reliability of equipment operation. The traditional solution is cumbersome to install, cannot record process data, and cannot accurately determine the fault location.

[0033] In addition, the AC withstand voltage test of GIL (Gas Insulated Metal Enclosed Transmission Line) involves a wider range, and when internal insulation breakdown discharge occurs, if the discharge position can be accurately located, the impact of repeatedly opening the cover to check the cause of the fault can be reduced, and the construction quality and work efficiency can be improved.

[0034] To this end, the present application proposes an AC withstand voltage test partial discharge fault recording and locating system, which can be applied to both GIS and GIL. When a discharge fault occurs during the test, the AC withstand voltage test partial discharge fault recording and locating system can be used to record the waveforms and effective values ​​of sensors at various gas chambers and key positions of the GIS during the entire fault process, as well as the waveforms and effective values ​​of the voltage during the boosting process, to form a fault analysis report. The amplitude and time difference of the sensor voltage can also be checked to locate the fault, thereby quickly locating the discharge position of the insulation breakdown fault.

[0035] like Figure 1 As shown, an AC withstand voltage test partial discharge fault recording and locating system according to an embodiment may include:

[0036] A plurality of sensors 102, each sensor 102 is respectively arranged at a corresponding collection position of the GIS device 100;

[0037] A plurality of signal acquisition cards 104, each of which has a data channel group, each of which includes at least one data acquisition channel, each of which is used to receive an input signal transmitted by a corresponding sensor and output an acquisition signal;

[0038] A signal acquisition chassis 106, wherein the signal acquisition chassis 106 is provided with at least one slot, and the slot is used to insert the signal acquisition card 104 to receive and output various acquisition signals;

[0039] The computer device 108 is connected to the signal acquisition chassis 106 and is used to receive the acquisition signal to determine the partial discharge position of the GIS device 100 .

[0040] Specifically, in the AC withstand voltage test partial discharge fault recording and locating system of the embodiment of the present application, the signal acquisition card 104 is installed on the signal acquisition chassis 106, and the sensor 102 can be directly connected to the signal acquisition card 104 to complete the connection. The signal acquisition chassis 106 converts the relevant signal output to the computer device 108, and the computer device 108 then outputs the visual signal / data.

[0041] Among them, the computer device 108 can determine the order of precedence by the time difference between the signals received by each sensor 102, and then analyze which two sensors the signal is located between, and calculate the location of the breakdown discharge. It should be noted that the above-mentioned calculations performed by the computer device and the process of determining the location of the partial discharge can be configured using an existing program or an existing program. The embodiment of the present application does not rely on the program configuration itself and the specific implementation method. The present application is based on the above-mentioned multiple sensors respectively set at the corresponding collection positions of the GIS device, a signal acquisition card with a data channel group, and a signal acquisition chassis providing a slot for inserting the signal acquisition card, so that the computer device can manually or automatically start recording by, for example, customizing the installation location name, current or voltage category, and over-limit value of each channel. When there is a fault in production, the fault location can be automatically determined, and the recording is automatically saved after completion, and historical events can be viewed.

[0042] The embodiment of the present application can conveniently and quickly record the whole process data with high accuracy, plug-and-play traceability, and precise positioning. Among them, through computer equipment with a signal acquisition chassis, multiple signal acquisition cards, and multiple sensors, the AC withstand voltage test partial discharge fault recording and positioning system can digitally transform the test data to integrate digital technology into the power construction business, and can rely on the Internet of Things platform to achieve digital transformation at the technical level through big data, cloud computing, artificial intelligence, and the Internet of Things, so as to quickly locate the discharge position of the insulation breakdown fault, improve construction quality, and improve work efficiency.

[0043] Illustratively, the AC withstand voltage test partial discharge fault recording and locating system of the embodiment of the present application can collect discharge signals from key parts of the GIS equipment through multiple sensors 102 respectively arranged at corresponding collection positions of the GIS equipment 100; wherein, the discharge position of the equipment is unknown, and the withstand voltage test is a destructive experiment. In this regard, the embodiment of the present application uses multiple sensors 102 corresponding to multiple collection positions to make the positioning closer to the discharge point, thereby ensuring that the fault location can be determined as much as possible at one time without the need for repeated voltage tests.

[0044] For example, the sensor in the embodiment of the present application may be a vibration sensor (100mV) or a sound sensor, which is not limited in the embodiment of the present application. Optionally, the sensor may include a sound sensor and a vibration sensor for data collection. The principle of the sound sensor and the vibration sensor may be that the sound or vibration is received, and the feedback signal is a voltage signal.

[0045] In one embodiment, the sensor may include a piezoelectric ceramic sensor.

[0046] Specifically, the type of the sensor in the embodiment of the present application can be piezoelectric ceramics, such as high-precision piezoelectric ceramics. The present application uses high-precision piezoelectric ceramics with high sensitivity, which can determine the fault and accurately locate it.

[0047] Regarding the collection location in the present application, in a possible implementation, the collection location is a key part of the GIS equipment; the key part includes the isolating switch, the circuit breaker air chamber and the air chamber connection.

[0048] Specifically, GIS equipment can include units that implement various functions, called intervals, mainly including incoming (outgoing) line intervals, busbar (busbar) intervals, metering protection intervals (voltage transformers), etc. The gas system of GIS can be divided into several gas chambers. Generally, the gas chamber of the circuit breaker has a high pressure, and the current transformer is installed in the gas chamber; the main bus, voltage transformer, and lightning arrester are independent gas chambers, and the gas chamber division of other components is determined according to the project.

[0049] For example, the embodiment of the present application takes the collection location as the key part of the GIS equipment, such as Figure 1 As shown, the key parts may include the isolating switch, the circuit breaker gas chamber (i.e., the chamber where the circuit breaker is located) and the gas chamber connection (i.e., the chamber connection part), and then through multiple sensors and corresponding signal acquisition cards, the discharge signals of the key parts of the GIS can be effectively collected, which is more convenient and quick, and is conducive to recording the entire process data with high accuracy.

[0050] Further, in one of the embodiments, the sensor is configured to be fixed in the form of a strap.

[0051] Specifically, in the embodiment of the present application, the sensor is fixed to the GIS device in the form of a strap, which facilitates timely and quick replacement of the position of the sensor so as to effectively correspond to each collection position and achieve accurate positioning.

[0052] In some embodiments, the sensors are arranged at equal intervals; the interval between adjacent sensors is less than or equal to 1000 mm.

[0053] Specifically, in the embodiment of the present application, the fixed positions of each sensor can be arranged at equal intervals, or can be arranged at key positions (such as key parts), and the embodiment of the present application has no limitation on this; optionally, the arrangement interval between the sensors does not exceed 1 meter to ensure that the positioning is closer to the discharge point, so that the fault location can be determined at one time, thereby improving the positioning accuracy.

[0054] It is understandable that the type of the above-mentioned sensor, the installation location of the sensor, the installation method of the sensor, etc. can also adopt other forms and are not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of determining the fault location once.

[0055] Based on multiple sensors 102, the AC withstand voltage test partial discharge fault recording and locating system of the embodiment of the present application may also include multiple signal acquisition cards 104, wherein the signal acquisition card 104 may have a data channel group, each data channel group may include at least one data acquisition channel, and each data acquisition channel is used to receive an input signal transmitted by a corresponding sensor and output an acquisition signal. It should be noted that Figure 1 In the figure, only a data channel group including 4 data acquisition channels is used as an example for schematic illustration, and the embodiment of the present application does not limit the number of data acquisition channels.

[0056] Exemplarily, the signal acquisition card 104 as a data acquisition module can collect discharge signals from key parts of the GIS; in one embodiment, the signal acquisition card can be a sound and vibration input module.

[0057] Specifically, the sound and vibration input module can provide signal conditioning and analog-to-digital conversion functions for the system. Optionally, each data acquisition channel of the sound and vibration input module can measure signals simultaneously as input channels. Exemplarily, the sound and vibration input module is compatible with sensors and can support multiple types of sensors, thereby being able to measure signals from integrated electronic piezoelectric and non-electronic piezoelectric sensors, and the sound and vibration input module has a driver and configuration utility to simplify configuration and measurement.

[0058] In one of the embodiments, the data acquisition channel has an anti-aliasing filter built in; the data acquisition channel is used to perform signal conditioning on the input signal, and the conditioned signal is output after being filtered through the anti-aliasing filter after analog-to-digital conversion.

[0059] Specifically, the sound and vibration input module can integrate AC / DC coupling and electronic piezoelectric signal conditioning. Each data acquisition channel has a built-in anti-aliasing filter, which can automatically adjust to the sampling rate. Exemplarily, the sensitivity of the acquisition card (i.e., the sampling voltage) can be adjusted. Optionally, the data acquisition channel can be an analog signal channel.

[0060] In one embodiment, the signal acquisition card is an I / O module.

[0061] Specifically, the signal acquisition card in the embodiment of the present application can be an I / O module, and can be used together with a signal acquisition chassis to create a combination of analog I / O and digital I / O measurements.

[0062] It can be understood that the above-mentioned signal acquisition card can also adopt other forms, not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of providing multiple data acquisition channels and can be used in conjunction with the signal acquisition chassis.

[0063] In one embodiment, the number of data acquisition channels is 32.

[0064] Specifically, in the embodiment of the present application, the system can be set with 1-32 analog signal channels. When partial discharge occurs, the computer device can automatically determine the amplitude and time difference of each channel to locate the fault and quickly locate the discharge position of the insulation breakdown fault. In the process of boosting, all channel signals are recorded, and the withstand time and voltage are recorded at the same time. The recording is manually started, and each channel is configured with a corresponding over-limit value. When partial discharge occurs, the amplitude and time difference of each channel are automatically determined to locate the fault.

[0065] Furthermore, based on multiple data acquisition channels, when there are many connected devices and a large amount of data, the computer equipment can record the waveforms and effective values ​​of the various air chambers and key position sensors of the GIS throughout the fault process, as well as the waveforms and effective values ​​of the voltage in the boosting process by configuring the relevant parameters of each channel (for example, the name of the installation location, the current or voltage category, the over-limit value, etc.), and form a fault analysis report, which can view the amplitude and time difference of the sensor voltage.

[0066] In an exemplary embodiment, the signal acquisition chassis 106 is a USB chassis powered by a bus.

[0067] Specifically, in the embodiment of the present application, data acquisition uses a signal acquisition chassis, which collects discharge signals from key parts of the GIS through a sound and vibration input module and is connected to a computer device (PC-based measurement and control system). Among them, the signal acquisition chassis can be a bus-powered USB (Universal Serial Bus) chassis, which can be suitable for a small portable sensor measurement system. For example, the signal acquisition chassis can provide various connection options such as USB, Ethernet or WiFi, which is not limited in the embodiment of the present application.

[0068] In some examples, the signal acquisition chassis includes a shell, and at least one slot is provided on any surface of the shell, thereby providing a channel for inserting the signal acquisition card; taking the signal acquisition card as an I / O module as an example, the signal acquisition chassis has multiple slots, which can perform various mixed measurement data acquisitions in a synchronous I / O system, and can also provide sufficient I / O for various applications.

[0069] Exemplarily, the signal acquisition chassis can be used with I / O modules to create a combination of analog I / O, digital I / O, and counter / timer measurements. Optionally, the signal acquisition chassis can include multiple general-purpose counter / timers that are accessed through I / O modules and can be used for applications involving quadrature encoders, PWM (Pulse width modulation wave), event counting, pulse train generation, and period or frequency measurement. The signal acquisition chassis can also provide multiple timing engines to run multiple hardware-timed operations simultaneously at independent rates for analog inputs.

[0070] Exemplarily, the signal acquisition chassis may be a CompactDAQ chassis; it is understandable that the signal acquisition chassis may also be in other forms, not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of providing multiple channels in conjunction with the acquisition card.

[0071] In some examples, the computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 2As shown. The computer device may include a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface, the display unit and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium may store an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device.

[0072] The embodiment of the present application determines the fault by collecting digital signals by computer, thereby improving the accuracy of fault location; illustratively, the computer device as a background host can be equipped with an operating system that is created by programming the processor and FPGA based on the existing LabVIEW FPGA (Field Programmable Gate Array) module and NI-DAOmx driver. Optionally, the computer device can be based on the combination of existing software tools such as NILinux Real-Time, LabVIEW FPGA module and NI-DAOmx to build a PC-side measurement and recording platform for the fault recording and location system, that is, the processor and FPGA can be programmed through existing software tools to reduce risks faster, improve productivity, and reduce the need to create and maintain I / O drivers, operating systems, and other middleware. Among them, the startup method of the platform may include but is not limited to means startup and analog startup (mutation quantity, over-limit). The platform can also perform data management, automatically save through the database, and then view historical events.

[0073] The communication interface of the computer device is used to communicate with external terminals in wired or wireless ways. The wireless way can be achieved through WIFI, mobile cellular network, Near Field Communication (NFC) or other technologies. Furthermore, in the environment without remote network (or no network), the on-site mobile Internet of Things is used to collect data, and then sent to the background server when the network is available.

[0074] In case of a large number of connected devices and a large amount of data, the computer equipment can provide a simultaneous recording function and the corresponding hardware communication protocol. When a discharge fault occurs during the test, the AC withstand voltage test partial discharge fault recording and positioning system can be used to record the waveforms and effective values ​​of the gas chambers and key position sensors of the GIS during the entire fault process, as well as the waveforms and effective values ​​of the voltage during the boosting process, and form a fault analysis report, which can view the amplitude and time difference of the sensor voltage. For example, the change process within 10 minutes of the withstand voltage process can be recorded. If abnormal conditions such as excessive high voltage occur, the system is also equipped with automatic alarm and other functions.

[0075] Furthermore, the computer device can be displayed at the front end. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad provided on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0076] The above-mentioned AC withstand voltage test partial discharge fault recording and locating system can be applied to equipment such as GIL, GIS and similar equipment. The following takes the setting of 1-32 analog signal channels as an example to specifically explain the AC withstand voltage test partial discharge fault recording and locating system. Figure 3 As shown, the sampling voltage can refer to the acquisition sensitivity and range of the acquisition card signal, which affects the accuracy of the sampling data; when partial discharge occurs, the system can automatically determine the amplitude and time difference of each channel to locate the fault and quickly locate the discharge position of the insulation breakdown fault. Among them, the system can record the signals of all channels during the boost process, and record the withstand time and voltage at the same time, manually start the recording, and configure the corresponding over-limit value for each channel. When partial discharge occurs, the amplitude and time difference of each channel are automatically determined to locate the fault.

[0077] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An AC withstand voltage test partial discharge fault recording and locating system, characterized in that: include: A plurality of sensors, each of which is arranged at a corresponding collection position of the GIS device; A plurality of signal acquisition cards, each of which has a data channel group, each of which includes at least one data acquisition channel, each of which is used to receive an input signal transmitted by a corresponding sensor and output an acquisition signal; A signal acquisition chassis, wherein the signal acquisition chassis is provided with at least one slot, wherein the slot is used to insert the signal acquisition card to receive and output each of the acquisition signals; A computer device is connected to the signal acquisition chassis and is used to receive the acquisition signal to determine the partial discharge position of the GIS device.

2. The AC withstand voltage test partial discharge fault recording and locating system according to claim 1, characterized in that: The signal acquisition card is a sound and vibration input module; the sensor includes a sound sensor and a vibration sensor.

3. The AC withstand voltage test partial discharge fault recording and locating system according to claim 2, characterized in that: The data acquisition channel is equipped with an anti-aliasing filter; the data acquisition channel is used to perform signal conditioning on the input signal, and the conditioned signal is filtered and output through the anti-aliasing filter after analog-to-digital conversion.

4. The AC withstand voltage test partial discharge fault recording and locating system according to claim 2, characterized in that: The number of the data acquisition channels is 32.

5. The AC withstand voltage test partial discharge fault recording and locating system according to claim 1, characterized in that: The signal acquisition card is an I / O module.

6. The AC withstand voltage test partial discharge fault recording and locating system according to claim 1, characterized in that: The sensor comprises a piezoelectric ceramic sensor.

7. The AC withstand voltage test partial discharge fault recording and locating system according to claim 1, characterized in that: The collection location is the key part of the GIS equipment; the key part includes the isolating switch, the circuit breaker air chamber and the air chamber connection.

8. The AC withstand voltage test partial discharge fault recording and locating system according to any one of claims 1 to 7, characterized in that: The sensor is configured to be fixed in the form of a strap.

9. The AC withstand voltage test partial discharge fault recording and locating system according to claim 8, characterized in that: The sensors are arranged at equal intervals; and the interval between adjacent sensors is less than or equal to 1000 mm.

10. The AC withstand voltage test partial discharge fault recording and locating system according to claim 1, characterized in that: The signal acquisition chassis is a USB chassis powered by a bus.

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