Electric reactor transient arc detection method, device, equipment and medium

Abstract

The invention discloses an electric reactor transient arc detection method, device and equipment and a medium. The method comprises the steps that an optical signal, an acoustic signal and an electromagnetic pulse signal in an electric reactor oil tank are collected in real time; arc fault diagnosis is carried out based on the optical signal, the sound signal and the electromagnetic pulse signal, and a diagnosis result is obtained; and executing a protection action based on the diagnosis result. According to the invention, multi-parameter signal synchronous monitoring can be realized, and the risk of missing report caused by limitation of a single signal is reduced; in addition, the characteristics of the electric arc in the oil are used as a criterion, so that the probability of false alarm and missing alarm is reduced.

Description

Technical Field

[0001] This application relates to the field of arc detection technology, and in particular to a method, apparatus, equipment and medium for transient arc detection of reactors. Background Technology

[0002] The rapid detection method for internal arc faults in reactors mainly uses the characteristics of arc in the oil as the identification criterion. Once the sensor detects the relevant characteristics, it can issue a trip signal. However, it has been found during the detection process that this method cannot identify all internal arc faults in reactors.

[0003] In arc signal detection, if the arc fault occurs inside the reactor winding, the optical signal may be blocked by the reactor winding and other structures, preventing it from being received by the optical sensor and leading to missed arc fault detection. For acoustic signal detection, since pressure waves take time to propagate in a relatively large oil tank, using more accurate late-stage pressure wave characteristics as a criterion may miss the optimal fault clearing time, while using faster early-stage pressure wave characteristics may be affected by interference from spark discharges. For electromagnetic pulse signal detection, partial discharges and spark discharges can also generate electromagnetic pulses, creating interference and leading to false arc fault detection. Therefore, using a single arc characteristic quantity in the reactor oil as a criterion for rapid arc fault detection cannot cover all defects, resulting in false arc fault detection. Summary of the Invention

[0004] This disclosure provides a method, apparatus, equipment, and medium for detecting transient arcing in reactors, thereby at least solving the above-mentioned technical problems existing in the prior art.

[0005] According to a first aspect of this application, a method for detecting transient arcing in a reactor is provided, comprising:

[0006] Real-time acquisition of optical signals, acoustic signals, and electromagnetic pulse signals from inside the reactor tank;

[0007] Arc fault diagnosis is performed based on the optical signal, acoustic signal, and electromagnetic pulse signal to obtain the diagnosis result;

[0008] Based on the diagnostic results, protective actions are performed.

[0009] In one possible implementation, the real-time acquisition of optical signals, acoustic signals, and electromagnetic pulse signals within the reactor tank includes:

[0010] The light signal in the oil is collected by at least one optical sensor installed inside the reactor oil tank;

[0011] The acoustic signal is acquired by at least one acoustic sensor installed at a first predetermined distance around the reactor;

[0012] The electromagnetic pulse signal is acquired by at least one electromagnetic sensor installed at a second predetermined distance around the reactor;

[0013] The output signals of the optical sensor, acoustic sensor, and electromagnetic sensor are synchronously processed in the time domain by the signal processing circuit.

[0014] In one embodiment, the optical sensor is positioned directly opposite the center of the projection area of ​​the reactor winding on the inner wall of the oil tank.

[0015] In one possible implementation, arc fault diagnosis is performed based on the optical signal, acoustic signal, and electromagnetic pulse signal to obtain diagnostic results, including:

[0016] Determine whether the optical signal is abnormal;

[0017] In response to an abnormality in the optical signal, an arc fault is determined.

[0018] Otherwise, determine whether the sound signal is abnormal;

[0019] In response to an abnormal acoustic signal, an arc fault is determined.

[0020] Otherwise, determine whether the electromagnetic pulse signal is abnormal;

[0021] In response to the abnormality of the electromagnetic pulse signal, an arc fault is determined to exist.

[0022] In one possible implementation, determining whether the optical signal is abnormal includes:

[0023] Compare at least one acquired optical signal with a preset optical signal threshold;

[0024] An arc fault is determined to have occurred if the intensity of any optical signal exceeds the optical signal threshold.

[0025] In one possible implementation, determining whether the acoustic signal is abnormal includes:

[0026] Identify whether the acoustic signal exhibits an oscillating decay wave in the time domain waveform;

[0027] In response to the identification of an oscillating and decaying wave in the acoustic signal, an arc fault is determined to exist.

[0028] In one possible implementation, determining whether the electromagnetic pulse signal is abnormal includes:

[0029] Identify whether the electromagnetic pulse signal exhibits periodic peak characteristics in the time domain;

[0030] In response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, an arc fault is determined to exist.

[0031] In one possible implementation, performing the protective action based on the diagnostic result includes:

[0032] In response to the intensity of any optical signal exceeding the optical signal threshold, a first fault flag is generated; and / or,

[0033] In response to the identification that the acoustic signal presents an oscillating attenuated wave, a second fault flag is generated;

[0034] And / or in response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, a third fault flag is generated;

[0035] A trip command is generated based on at least one of the first fault flag, the second fault flag, and the third fault flag.

[0036] According to a second aspect of this application, a transient arc detection device for a reactor is provided, comprising:

[0037] The signal sensing module is used to collect optical signals, acoustic signals and electromagnetic pulse signals in the reactor oil tank in real time;

[0038] The fault diagnosis module is used to perform arc fault diagnosis based on the optical signal, acoustic signal and electromagnetic pulse signal, and obtain the diagnosis result;

[0039] The protection module is used to perform protection actions based on the diagnostic results.

[0040] In one embodiment, the signal sensing module includes at least one optical sensor, at least one acoustic sensor, and at least one electromagnetic sensor;

[0041] At least one of the optical sensors is disposed inside the reactor tank;

[0042] At least one acoustic sensor is installed on the outer wall of the reactor tank;

[0043] At least one electromagnetic sensor is positioned at a second predetermined distance around the reactor.

[0044] In one possible implementation, the fault diagnosis module includes:

[0045] The signal processing circuit is used to receive optical signals, acoustic signals and electromagnetic pulse signals, realize synchronous time-domain processing of multi-parameter signals, and perform arc fault diagnosis.

[0046] The optical sensor, acoustic sensor, and electromagnetic sensor are respectively connected to the signal processing circuit.

[0047] In one possible implementation, the optical sensor is an optical fiber sensor;

[0048] The fiber optic sensor is connected to the photodetector via an optical fiber, and the photodetector converts the optical signal into an electrical signal and transmits it to the signal processing circuit.

[0049] In one possible implementation, the acoustic sensor is a microphone.

[0050] In one possible implementation, the electromagnetic sensor is a broadband antenna.

[0051] According to a third aspect of this application, an electronic device is provided, comprising:

[0052] A memory communicatively connected to the at least one processor; wherein,

[0053] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method described in any of the above embodiments.

[0054] According to a fourth aspect of this application, a non-transitory computer-readable storage medium is provided storing computer instructions for causing the computer to perform the methods described in this application.

[0055] According to a fifth aspect of this application, a computer program product is provided, comprising a computer program or instructions that, when executed by a processor, implement the method described in this application.

[0056] The technical solution of this application enables simultaneous monitoring of multiple parameter signals, reducing the risk of missed detections caused by the limitations of a single signal.

[0057] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0058] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:

[0059] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0060] Figure 1A schematic diagram of the steps of the transient arc detection method for reactors in an embodiment of this application is shown;

[0061] Figure 2 A flowchart illustrating the transient arc detection method for reactors in an embodiment of this application is shown.

[0062] Figure 3 A schematic diagram of optical signal anomalies in an embodiment of this application is shown;

[0063] Figure 4 A schematic diagram of acoustic signal anomalies in an embodiment of this application is shown;

[0064] Figure 5 A schematic diagram of electromagnetic pulse signal anomaly is shown in an embodiment of this application;

[0065] Figure 6 A schematic diagram of the transient arc detection device for reactors in an embodiment of this application is shown;

[0066] Figure 7 A schematic diagram of the composition structure of the electronic device in an embodiment of this application is shown. Detailed Implementation

[0067] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0068] In the following description, the terms "first" and "second" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first" and "second" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0070] The following description, in conjunction with the accompanying drawings, introduces a method, apparatus, equipment, and medium for detecting transient electric arcs in a reactor provided in this application.

[0071] like Figure 1 As shown, this application provides a method for detecting transient arcing in a reactor, comprising:

[0072] S101, real-time acquisition of optical signals, acoustic signals and electromagnetic pulse signals in the reactor oil tank;

[0073] It should be noted that optical signals are ultraviolet-visible light generated by corona discharge, partial discharge, spark discharge, or electric arc. Acoustic signals include vibration (mechanical) and acoustic emission (sudden) signals. Mechanical vibrations of windings or iron cores, as well as ultrasonic pressure waves generated by partial discharge, can propagate in oil. Electromagnetic pulse signals are steep pulse currents generated by partial discharge, which excite high-frequency electromagnetic waves.

[0074] S102, perform arc fault diagnosis based on the optical signal, acoustic signal and electromagnetic pulse signal, and obtain the diagnosis result;

[0075] In this application, an arc fault is determined when any parameter signal among the optical signal, acoustic signal, and electromagnetic pulse signal is abnormal.

[0076] S103, based on the diagnostic results, perform protective actions.

[0077] When an arc fault occurs, the power switch is cut off and an early warning is issued.

[0078] The transient arc detection method for reactors provided in this application acquires multiple parameters, including optical, acoustic, and electromagnetic pulse signals. An alarm is triggered when any parameter signal is abnormal, enabling rapid detection. Simultaneously, the time difference between the optical, acoustic, and electrical signals allows for three-dimensional positioning of the power source within the tank. Since optical and electromagnetic pulse signals are highly sensitive to early, weak discharges, the early warning system becomes more accurate.

[0079] In some embodiments, the real-time acquisition of optical signals, acoustic signals, and electromagnetic pulse signals within the reactor tank includes:

[0080] The light signal in the oil is collected by at least one optical sensor installed inside the reactor oil tank;

[0081] The acoustic signal is acquired by at least one acoustic sensor installed at a first predetermined distance around the reactor;

[0082] The electromagnetic pulse signal is acquired by at least one electromagnetic sensor installed at a second predetermined distance around the reactor;

[0083] The output signals of the optical sensor, acoustic sensor, and electromagnetic sensor are synchronously processed in the time domain by the signal processing circuit.

[0084] It should be noted that optical sensors can be optical probes. Because the reactor contains complex structures such as the core windings, which obstruct and attenuate the propagation of optical signals, the placement of the optical probe is crucial. Ideally, it should be positioned directly facing the fault area, either on the front or side of the tank, depending on the sensor type, to cover as much of the projection area of ​​the windings on that surface as possible, or placed in the exact center of the projection area. Abnormal optical signals indicate conditions such as tip discharge, floating discharge, insulation degradation, and inter-turn short-circuit arcing.

[0085] When selecting the location of the acoustic sensor, it monitors the vibration amplitude and spectrum changes of the power frequency and its harmonics to reflect the winding compression status, core loosening, etc. It captures high-frequency (tens of kHz to hundreds of kHz) ultrasonic pulses for locating and identifying partial discharges. It can detect winding deformation / loosening, core faults, and partial discharges.

[0086] When selecting the location for the electromagnetic sensor, the discharge in the oil releases a large number of electromagnetic pulses. These electromagnetic pulses can be detected by using an antenna with a specialized discharge frequency band. Abnormal electromagnetic pulse signals indicate partial discharges caused by various insulation defects and are one of the most sensitive indicators of insulation condition.

[0087] In this application, after acquiring the output signals of the optical sensor, acoustic sensor, and electromagnetic sensor, synchronous time-domain processing is performed through a signal processing circuit.

[0088] In some embodiments, the optical sensor is positioned directly opposite the center of the projection area of ​​the reactor winding on the inner wall of the tank.

[0089] In this application, optical signals are transmitted to a photodetector via optical fiber, converted into electrical signals, and transmitted to the terminal; acoustic signals and electromagnetic pulse signals are directly transmitted to the terminal; together with the device voltage and current signals, they constitute a multi-parameter synchronous acquisition system.

[0090] In some embodiments, arc fault diagnosis is performed based on the optical signal, acoustic signal, and electromagnetic pulse signal to obtain diagnostic results, including:

[0091] Determine whether the optical signal is abnormal;

[0092] In response to an abnormality in the optical signal, an arc fault is determined.

[0093] Otherwise, determine whether the sound signal is abnormal;

[0094] In response to an abnormal acoustic signal, an arc fault is determined.

[0095] Otherwise, determine whether the electromagnetic pulse signal is abnormal;

[0096] In response to the abnormality of the electromagnetic pulse signal, an arc fault is determined to exist.

[0097] In this application, any abnormality in optical signals, acoustic signals, or electromagnetic pulse signals indicates the presence of an electric arc fault.

[0098] In some embodiments, such as Figure 2 As shown, determining whether the optical signal is abnormal includes:

[0099] Compare at least one acquired optical signal with a preset optical signal threshold;

[0100] An arc fault is determined to have occurred if the intensity of any optical signal exceeds the optical signal threshold.

[0101] In some embodiments, determining whether the acoustic signal is abnormal includes:

[0102] Identify whether the acoustic signal exhibits an oscillating decay wave in the time domain waveform;

[0103] In response to the identification of an oscillating and decaying wave in the acoustic signal, an arc fault is determined to exist.

[0104] In some embodiments, determining whether the electromagnetic pulse signal is abnormal includes:

[0105] Identify whether the electromagnetic pulse signal exhibits periodic peak characteristics in the time domain;

[0106] In response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, an arc fault is determined to exist.

[0107] As a specific example, such as Figure 3 As shown, this application can synchronously acquire optical signals o1(t), o2(t)...on(t); acoustic signals p1(t), p2(t)...pn(t); and electromagnetic pulse signal e(t). An optical signal threshold is set, and a trip command is sent when a certain optical signal oi(t) exceeds the threshold. Since the inside of the fuel tank is a dark environment, the light radiation intensity is typically in the nW~uW range; therefore, the threshold should be set in the uW~mW range.

[0108] like Figure 4 As shown, the acoustic signal exhibits an oscillating decay wave, confirming an arc fault.

[0109] like Figure 5 As shown, the electromagnetic pulse exhibits a periodic peak value of 10ms, which can be used to identify electric arcs in oil and determine arc faults.

[0110] In some embodiments, performing protective actions based on the diagnostic results includes:

[0111] In response to the intensity of any optical signal exceeding the optical signal threshold, a first fault flag is generated; and / or,

[0112] In response to the identification that the acoustic signal presents an oscillating attenuated wave, a second fault flag is generated;

[0113] And / or in response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, a third fault flag is generated;

[0114] A trip command is generated based on at least one of the first fault flag, the second fault flag, and the third fault flag.

[0115] In this application, the real-time monitored optical signal intensity value exceeds the preset optical signal threshold, the over-threshold state lasts for at least 1 millisecond, the optical pulse waveform has a steep rising edge and a specific duration, and when the above conditions are met simultaneously, a first fault flag is immediately generated.

[0116] In this application, a second fault flag is generated when the acoustic signal presents an oscillating decay wave.

[0117] In this application, a pulse exceeding the electromagnetic peak threshold is detected, at least three peaks are detected within a 100-millisecond window, the peak interval time is relatively stable, the coefficient of variation is less than 20%, the repetition frequency is in the range of 10Hz-1kHz, the signal energy is concentrated in the UHF band (300MHz-3GHz), and a third fault flag is generated when periodic peak characteristics are detected.

[0118] This application's three parametric signal processing modules operate in parallel and make independent judgments. If any parametric signal detects a corresponding fault characteristic, a corresponding fault flag is immediately generated. At least one of the first, second, and third fault flags is valid; the generation of any fault flag immediately triggers a judgment process.

[0119] This application can also include measures to prevent malfunctions, such as checking the same fault flag only once within 5 milliseconds; optionally setting a 10-millisecond confirmation window, requiring the fault characteristic to persist within the window; and automatically locking the tripping function during system maintenance and testing modes.

[0120] In this application, when the tripping conditions are met, the protection system immediately generates a tripping command. For example, it can be directly output to the circuit breaker tripping circuit via relay contacts or sent to the smart circuit breaker via a GOOSE message. Simultaneously, at least two independent tripping signals are output to improve reliability. After outputting the tripping command, the circuit breaker position signal is monitored to confirm the tripping execution.

[0121] After tripping, retain all fault indicators until manually reset. Record the fault occurrence time, fault indicator type, trip time, etc. Save the raw waveform data for 1 second before and after the fault. Trigger the audible and visual alarms and upload the fault information to the monitoring system.

[0122] like Figure 6 As shown, this application provides a transient arc detection device for a reactor, comprising:

[0123] The signal sensing module 601 is used to collect optical signals, acoustic signals and electromagnetic pulse signals in the reactor oil tank in real time.

[0124] The fault diagnosis module 602 is used to perform arc fault diagnosis based on the optical signal, acoustic signal and electromagnetic pulse signal, and obtain the diagnosis result;

[0125] The protection module 603 is used to perform protection actions based on the diagnostic results.

[0126] The transient arc detection device for reactors provided in this application acquires optical signals, acoustic signals, and electromagnetic pulse signals in the reactor tank in real time through a signal sensing module 601; a fault diagnosis module 602 performs arc fault diagnosis based on the optical signals, acoustic signals, and electromagnetic pulse signals to obtain a diagnosis result; and a protection execution module 603 executes a protection action based on the diagnosis result.

[0127] In some embodiments, the signal sensing module includes at least one optical sensor, at least one acoustic sensor, and at least one electromagnetic sensor;

[0128] At least one of the optical sensors is disposed inside the reactor tank;

[0129] At least one acoustic sensor is positioned at a first predetermined distance around the reactor;

[0130] At least one electromagnetic sensor is positioned at a second predetermined distance around the reactor.

[0131] In some embodiments, the fault diagnosis module includes:

[0132] The signal processing circuit is used to receive optical signals, acoustic signals and electromagnetic pulse signals, realize synchronous time-domain processing of multi-parameter signals, and perform arc fault diagnosis.

[0133] The optical sensor, acoustic sensor, and electromagnetic sensor are respectively connected to the signal processing circuit.

[0134] In some embodiments, the optical sensor is an optical fiber sensor;

[0135] The fiber optic sensor is connected to the photodetector via an optical fiber, and the photodetector converts the optical signal into an electrical signal and transmits it to the signal processing circuit.

[0136] In some embodiments, the acoustic sensor is a microphone.

[0137] In some embodiments, the electromagnetic sensor is a broadband antenna.

[0138] According to embodiments of this application, this application also provides an electronic device and a readable storage medium.

[0139] The electronic device includes at least one processor and a memory communicatively connected to the at least one processor. The memory stores instructions executable by the at least one processor, which, when executed, enable the at least one processor to perform the transient arc detection method for reactors described in this application. The computer instructions are used to cause the computer to perform the transient arc detection method for reactors described in this application.

[0140] This application also provides a computer program product, including a computer program / instructions, which, when executed by a processor, implements the transient arc detection method for reactors of this application.

[0141] Figure 4 A schematic block diagram of an example electronic device 800 that can be used to implement embodiments of this application is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0142] like Figure 4 As shown, device 800 includes a computing unit 801, which can perform various appropriate actions and processes based on a computer program stored in read-only memory (ROM) 802 or a computer program loaded from storage unit 808 into random access memory (RAM) 803. RAM 803 may also store various programs and data required for the operation of device 800. The computing unit 801, ROM 802, and RAM 803 are interconnected via bus 804. Input / output (I / O) interface 805 is also connected to bus 804.

[0143] Multiple components in device 800 are connected to I / O interface 805, including: input unit 806, such as keyboard, mouse, etc.; output unit 807, such as various types of monitors, speakers, etc.; storage unit 808, such as disk, optical disk, etc.; and communication unit 809, such as network card, modem, wireless transceiver, etc. Communication unit 809 allows device 800 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0144] The computing unit 801 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 801 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 801 performs the various methods and processes described above, such as the reactor transient arc detection method. For example, in some embodiments, the reactor transient arc detection method can be implemented as a computer software program tangibly contained in a machine-readable medium, such as storage unit 808. In some embodiments, part or all of the computer program can be loaded and / or installed on device 800 via ROM 802 and / or communication unit 809. When the computer program is loaded into RAM 803 and executed by the computing unit 801, one or more steps of the reactor transient arc detection method described above can be performed. Alternatively, in other embodiments, the computing unit 801 may be configured to perform a reactor transient arc detection method by any other suitable means (e.g., by means of firmware).

[0145] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0146] The program code used to implement the methods of this application may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing device, such that when executed by the processor or controller, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0147] In the context of this application, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0148] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0149] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0150] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact via communication networks. A client-server mapping is created by computer programs running on the respective computers and having client-server relationships with each other. Servers can be cloud servers, servers in distributed systems, or servers incorporating blockchain technology.

[0151] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for detecting transient arcing in a reactor, characterized in that, include: Real-time acquisition of optical signals, acoustic signals, and electromagnetic pulse signals from inside the reactor tank; Arc fault diagnosis is performed based on the optical signal, acoustic signal, and electromagnetic pulse signal to obtain the diagnosis result; Based on the diagnostic results, protective actions are performed.

2. The method according to claim 1, characterized in that, The real-time acquisition of optical signals, acoustic signals, and electromagnetic pulse signals within the reactor tank includes: The light signal in the oil is collected by at least one optical sensor installed inside the reactor oil tank; The acoustic signal is acquired by at least one acoustic sensor installed at a first predetermined distance around the reactor; The electromagnetic pulse signal is acquired by at least one electromagnetic sensor installed at a second predetermined distance around the reactor; The output signals of the optical sensor, acoustic sensor, and electromagnetic sensor are synchronously processed in the time domain by the signal processing circuit.

3. The method according to claim 1, characterized in that, The optical sensor is positioned directly opposite the center of the projection area of ​​the reactor winding on the inner wall of the oil tank.

4. The method according to claim 1, characterized in that, Arc fault diagnosis is performed based on the aforementioned optical signals, acoustic signals, and electromagnetic pulse signals, yielding diagnostic results, including: Determine whether the optical signal is abnormal; In response to an abnormality in the optical signal, an arc fault is determined. Otherwise, determine whether the sound signal is abnormal; In response to an abnormal acoustic signal, an arc fault is determined. Otherwise, determine whether the electromagnetic pulse signal is abnormal; In response to the abnormality of the electromagnetic pulse signal, an arc fault is determined to exist.

5. The method according to claim 4, characterized in that, The determination of whether the optical signal is abnormal includes: Compare at least one acquired optical signal with a preset optical signal threshold; An arc fault is determined to have occurred if the intensity of any optical signal exceeds the optical signal threshold.

6. The method according to claim 5, characterized in that, The determination of whether the acoustic signal is abnormal includes: Identify whether the acoustic signal exhibits an oscillating decay wave in the time domain waveform; In response to the identification of an oscillating and decaying wave in the acoustic signal, an arc fault is determined to exist.

7. The method according to claim 6, characterized in that, The determination of whether the electromagnetic pulse signal is abnormal includes: Identify whether the electromagnetic pulse signal exhibits periodic peak characteristics in the time domain; In response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, an arc fault is determined to exist.

8. The method according to claim 7, characterized in that, The protective action performed based on the diagnostic results includes: In response to the intensity of any optical signal exceeding the optical signal threshold, a first fault flag is generated; and / or, In response to the identification that the acoustic signal presents an oscillating attenuated wave, a second fault flag is generated; And / or in response to the periodic peak characteristics exhibited by the electromagnetic pulse signal, a third fault flag is generated; A trip command is generated based on at least one of the first fault flag, the second fault flag, and the third fault flag.

9. A transient arc detection device for a reactor, characterized in that, include: The signal sensing module is used to collect optical signals, acoustic signals and electromagnetic pulse signals in the reactor oil tank in real time; The fault diagnosis module is used to perform arc fault diagnosis based on the optical signal, acoustic signal and electromagnetic pulse signal, and obtain the diagnosis result; The protection module is used to perform protection actions based on the diagnostic results.

10. The transient arc detection device for reactors according to claim 9, characterized in that, The signal sensing module includes at least one optical sensor, at least one acoustic sensor, and at least one electromagnetic sensor. At least one of the optical sensors is disposed inside the reactor tank; At least one acoustic sensor is positioned at a first predetermined distance around the reactor; At least one electromagnetic sensor is positioned at a second predetermined distance around the reactor.

11. The transient arc detection device for reactors according to claim 10, characterized in that, The fault diagnosis module includes: The signal processing circuit is used to receive optical signals, acoustic signals and electromagnetic pulse signals, realize synchronous time-domain processing of multi-parameter signals, and perform arc fault diagnosis. The optical sensor, acoustic sensor, and electromagnetic sensor are respectively connected to the signal processing circuit.

12. The transient arc detection device for reactors according to claim 10, characterized in that, The optical sensor is a fiber optic sensor; The fiber optic sensor is connected to the photodetector via an optical fiber, and the photodetector converts the optical signal into an electrical signal and transmits it to the signal processing circuit.

13. The transient arc detection device for reactors according to claim 10, characterized in that, The acoustic sensor is a microphone.

14. The transient arc detection device for reactors according to claim 10, characterized in that, The electromagnetic sensor is a broadband antenna.

15. An electronic device, characterized in that, At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 8.

16. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-8.

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