Method and system for suppressing arc grounding overvoltage

Abstract

The invention provides a method and system for suppressing arc grounding overvoltage, and the method comprises the steps: obtaining a ground capacitance value of a power grid system in a normal operation state, and adjusting the inductance value of an arc suppression coil through the ground capacitance value, so as to enable the power grid system to be separated from a resonance region; monitoring and recording arc current data of the power grid system when the arc grounding fault occurs through an optical transformer, and performing spectral analysis on the arc current data to obtain a high-frequency component of the arc current data; and according to the high-frequency component, an adjustment strategy is obtained through analysis of an arc model constructed by using arc characteristics, and according to the adjustment strategy, the inductance value of the arc suppression coil is adjusted to perform full compensation so as to offset the arc current.

Description

Technical Field

[0001] The present application relates to the field of distribution network maintenance and management, and in particular to a method and system for suppressing arc grounding overvoltage. Background Art

[0002] Single-phase arc grounding fault is a common fault type in distribution network system. Due to its instability and harmfulness, how to suppress arc grounding overvoltage has become a difficult problem related to the safe operation of distribution network. In recent years, a lot of research has been done on arc grounding overvoltage, and effective measures have been sought to suppress arc grounding overvoltage in order to reduce the harm of arc grounding fault and improve the power supply reliability of the system, but the effect is not ideal. At present, the commonly used method is to eliminate arc grounding overvoltage by grounding the neutral point through arc extinguishing coil. The principle is to use the inductive current flowing through the neutral point arc extinguishing coil to offset the capacitive current flowing through the system to ground capacitance, thereby reducing the grounding fault current and achieving the purpose of eliminating arc grounding overvoltage. With the increase in the complexity of the system and the use of line cables, the capacitance to ground in the system changes more and more frequently, and automatic fast compensation devices are beginning to be used. However, according to the operation of the power supply system of enterprise users, there are some problems with the automatic tracking compensation method, and it does not play an arc extinguishing role. How to effectively suppress the high-frequency transient component of arc grounding fault overvoltage has become an urgent problem to be solved. Summary of the invention

[0003] The purpose of the present application is to provide a method and system for suppressing arc grounding overvoltage, which is based on the existing arc extinguishing coil automatic compensation device, and the difference lies in the extraction of high-frequency components and the adjustment of the arc extinguishing coil according to the high-frequency components.

[0004] To achieve the above-mentioned purpose, the method for suppressing arc grounding overvoltage provided in the present application specifically includes: obtaining the system's capacitance to ground when the power grid system is in normal operation, and adjusting the inductance of the arc suppression coil according to the capacitance to ground to make the power grid system leave the resonance area; monitoring and recording the arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor, and performing spectral analysis on the arc current data to obtain the high-frequency component of the arc current data; obtaining an adjustment strategy based on the high-frequency component by analyzing the arc model constructed using the arc characteristics, and adjusting the inductance of the arc suppression coil according to the adjustment strategy to perform full compensation to offset the arc current.

[0005] In the above-mentioned method for suppressing arc grounding overvoltage, optionally, monitoring and recording arc current data of the power grid system when an arc grounding fault occurs through an optical transformer includes: monitoring and recording arc current signals of the power grid system when an arc grounding fault occurs through an optical transformer; converting the arc current signals into frequency domain signals, and extracting the frequency domain components with the maximum amplitude in the frequency domain signals through spectrum analysis to obtain arc current data.

[0006] In the above-mentioned method for suppressing arc grounding overvoltage, optionally, adjusting the inductance value of the arc extinguishing coil according to the adjustment strategy to perform full compensation to offset the arc current also includes: continuously monitoring and recording the operation status of the power grid system according to a preset period; when an arc grounding fault occurs in the power grid system, adjusting the inductance value of the arc extinguishing coil according to the arc current data during the arc grounding fault process to perform full compensation to offset the arc current.

[0007] In the above-mentioned method for suppressing arc-grounding overvoltage, optionally, adjusting the inductance value of the arc-extinguishing coil according to the adjustment strategy for full compensation to offset the arc current also includes: continuously monitoring and recording the operation status of the power grid system according to a preset period; when no arc-grounding fault occurs in the power grid system within the preset period, adjusting the inductance value of the arc-extinguishing coil by the capacitance value to the ground to make the power grid system leave the resonance area.

[0008] In the above-mentioned method for suppressing arc-grounding overvoltage, optionally, the method further includes: obtaining the physical characteristics and behavior laws of the arc based on the historical operation data of the power grid system; and constructing an arc model through a learning algorithm based on the physical characteristics and the behavior laws.

[0009] In the above-mentioned method for suppressing arc grounding overvoltage, optionally, monitoring and recording arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor also includes: monitoring and recording operating parameters of the power grid system through an optical mutual inductor; obtaining fault type data through a preset fault analysis model analysis based on the operating parameters, and determining whether an arc grounding fault occurs in the power grid system based on the fault type data.

[0010] In the above-mentioned method for suppressing arc grounding overvoltage, optionally, the method further includes: constructing a sample database based on historical operation data and fault type information of the power grid system; and obtaining a fault analysis model through training of a learning algorithm based on the sample database.

[0011] The present application also provides a system for suppressing arc-grounding overvoltage, the system comprising an adjustment module, an analysis module and a compensation module; the adjustment module is used to obtain the system's capacitance to ground under normal operating conditions of the power grid system, and adjust the inductance of the arc suppression coil according to the capacitance to ground to make the power grid system leave the resonance area; the analysis module is used to monitor and record the arc current data of the power grid system when an arc-grounding fault occurs through an optical mutual inductor, and perform spectrum analysis on the arc current data to obtain the high-frequency component of the arc current data; the compensation module is used to obtain an adjustment strategy based on the high-frequency component by analyzing an arc model constructed using arc characteristics, and adjust the inductance of the arc suppression coil according to the adjustment strategy to perform full compensation to offset the arc current.

[0012] In the above-mentioned arc-grounding overvoltage suppression system, optionally, the analysis module includes: monitoring and recording the arc current signal of the power grid system when an arc-grounding fault occurs through an optical mutual inductor; converting the arc current signal into a frequency domain signal, and extracting the frequency domain component with the maximum amplitude in the frequency domain signal through spectrum analysis to obtain arc current data.

[0013] In the above-mentioned arc-grounding overvoltage suppression system, optionally, the system further includes a model building unit, which is used to obtain the physical characteristics and behavior laws of the arc based on the historical operation data of the power grid system; and to build an arc model through a learning algorithm based on the physical characteristics and the behavior laws.

[0014] In the above-mentioned arc grounding overvoltage suppression system, optionally, the analysis module further includes a fault analysis unit, which is used to monitor and record operating parameters of the power grid system through an optical mutual inductor; obtain fault type data through a preset fault analysis model analysis based on the operating parameters, and determine whether an arc grounding fault occurs in the power grid system based on the fault type data.

[0015] In the above-mentioned arc-fault grounding overvoltage suppression system, optionally, the system further includes a model building unit, which is used to build a sample database based on historical operation data and fault type information of the power grid system; and obtain a fault analysis model through training of a learning algorithm based on the sample database.

[0016] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above method when executing the computer program.

[0017] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0018] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0019] The beneficial technical effect of the present application is that it combines the basic principle of an automatic tuning arc suppression coil device, aims to extract the high-frequency component in the arc grounding fault current, and adjust the arc suppression coil according to the extracted high-frequency component for compensation; thereby, improving the safety and power supply reliability of the distribution network system, especially in the face of complex system structures and frequently changing line parameters, and can more effectively suppress the overvoltage problem caused by arc grounding faults. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application, constitute a part of the present application, and do not constitute a limitation of the present application. In the drawings:

[0021] Figure 1 A schematic diagram of a flow chart of a method for suppressing arc grounding overvoltage provided in an embodiment of the present application;

[0022] Figure 2 A schematic diagram of the process of obtaining arc current data provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a secondary fault handling process provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of a restore state flow chart provided by an embodiment of the present application;

[0025] Figure 5 A schematic diagram of the arc model construction process provided in one embodiment of the present application;

[0026] Figure 6 A schematic diagram of an arc grounding fault analysis process provided by an embodiment of the present application;

[0027] Figure 7 A schematic diagram of the application logic of the method for suppressing arc grounding overvoltage provided by an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the structure of a system for suppressing arc grounding overvoltage provided in one embodiment of the present application;

[0029] Fig. 9 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will describe the implementation methods of the present application in detail in conjunction with the accompanying drawings and embodiments, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that as long as there is no conflict, the various embodiments in the present application and the various features in the embodiments can be combined with each other, and the technical solutions formed are all within the protection scope of the present application.

[0031] In addition, the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be performed in an order different from that shown here.

[0032] Please refer to Figure 1 As shown, the method for suppressing arc grounding overvoltage provided by the present application specifically includes:

[0033] S101 obtains the ground capacitance value of the system in the normal operation state of the power grid system, and adjusts the inductance value of the arc suppression coil according to the ground capacitance value to make the power grid system leave the resonance area;

[0034] S102 monitors and records arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor, and performs spectrum analysis on the arc current data to obtain a high-frequency component of the arc current data;

[0035] S103 obtains an adjustment strategy based on the high-frequency component by analyzing an arc model constructed using arc characteristics, and adjusts the inductance of the arc extinguishing coil according to the adjustment strategy to perform full compensation to offset the arc current.

[0036] Specifically, the difference between an arc-to-ground fault and a single-phase metallic ground fault lies in the instability of the arc in the former, which is accompanied by the alternation of multiple arcing and arcing processes. According to the power frequency arcing theory, the interval between each arcing is approximately half a power frequency cycle. The working principle of a conventional automatic compensation device is to continuously monitor the capacitive current from the system point to the ground, which is usually calculated by experimentally measuring the system's capacitive reactance to the ground and then combining it with the system line voltage. However, this method is based on the power frequency for calculation, and can only obtain the power frequency current, but cannot capture the transient high-frequency current. If the transient current is to be compensated, it is necessary to understand the frequency of the transient component, so the extraction of the high-frequency component becomes extremely critical. The above-mentioned method for suppressing arc-to-ground overvoltage provided in the present application is based on the existing arc extinguishing coil automatic compensation device, and adds the extraction of high-frequency components, and adjusts the arc extinguishing coil accordingly; the specific implementation logic of each step will be described one by one in the subsequent embodiments, and will not be described in detail here.

[0037] In one embodiment of the present application, the purpose of the above step S101 is to adjust the normal operating state. Specifically, when the power grid system is in normal operation without fault, first use a specific measuring instrument or algorithm to accurately calculate the current value of the system's ground capacitance. This step is crucial for understanding the state of the power grid and the subsequent adjustment of the arc suppression coil. According to the calculated value of the system's ground capacitance, adjust the inductance value of the arc suppression coil to ensure that its operating point is away from possible resonance areas, thereby avoiding unnecessary resonance under normal conditions and ensuring the stable operation of the power grid.

[0038] Please refer to Figure 2 As shown, in one embodiment of the present application, monitoring and recording arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor includes:

[0039] S201 monitors and records arc current signals of the power grid system when an arc grounding fault occurs through an optical mutual inductor;

[0040] S202 converts the arc current signal into a frequency domain signal, and extracts the frequency domain component with the maximum amplitude in the frequency domain signal through spectrum analysis to obtain arc current data.

[0041] Specifically, in actual work, when an arc grounding fault occurs in the power grid, the fault detection system starts immediately to monitor and record the changes in the arc current during the arc process in real time. This process can be completed using a high-speed data acquisition system to ensure that the rapid changes in the arc current can be captured. Subsequently, the recorded arc current data is subjected to spectral analysis, which is to convert the time domain signal into a frequency domain signal through mathematical methods (such as fast Fourier transform FFT) to identify all frequency components contained in the arc current. In the spectrum analysis results, find the high-frequency component with the largest amplitude, and the frequency of this component is recorded as ω1. This frequency represents the main high-frequency noise generated during arc discharge, which is crucial for the subsequent adjustment of the arc suppression coil to effectively suppress overvoltage.

[0042] Please refer to Figure 3 As shown, in one embodiment of the present application, adjusting the inductance of the arc suppression coil according to the adjustment strategy to perform full compensation to offset the arc current also includes:

[0043] S301 continuously monitors and records the operation status of the power grid system according to a preset period;

[0044] S302 When an arc grounding fault occurs in the power grid system, the inductance value of the arc extinguishing coil is adjusted according to the arc current data during the arc grounding fault process to perform full compensation to offset the arc current.

[0045] For further information, please refer to Figure 4As shown, in one embodiment of the present application, adjusting the inductance of the arc suppression coil according to the adjustment strategy to perform full compensation to offset the arc current also includes:

[0046] S401 continuously monitors and records the operation status of the power grid system according to a preset period;

[0047] S402: When no arc grounding fault occurs in the power grid system within a preset period, the inductance value of the arc suppression coil is adjusted by the capacitance value to ground to make the power grid system leave the resonance area.

[0048] Specifically, in actual work, after obtaining the high-frequency component ω1 with the largest amplitude through the above embodiment, the inductance value of the arc extinguishing coil can be immediately adjusted to achieve a full compensation state for the ω1 frequency. Full compensation means that the inductance current generated by the arc extinguishing coil is equal in magnitude and opposite in direction to the high-frequency component in the arc current, thereby effectively offsetting the arc current and reducing the duration of the arc and the overvoltage that may be caused by it. Monitor and record the adjusted grid state. If a second arc process (i.e., arc reignition) is detected, repeat the above steps, continue to analyze the arc current spectrum and adjust the arc extinguishing coil until the arc is completely extinguished. If no new arc process is detected within a period of time, it can be considered that the arc has been extinguished. At this time, the arc extinguishing coil needs to be readjusted according to the normal operating state so that its inductance value is away from the resonance point again to maintain the stable operation of the power grid and prepare for the next possible fault. The entire process requires a precise control system and efficient data processing capabilities to ensure that it can respond quickly and effectively suppress overvoltage when an arc fault occurs, protecting the power grid equipment from damage.

[0049] It is worth noting that for the extraction of transient overvoltage signals, if the frequency of the transient component is very large, ordinary electromagnetic mutual inductors may not be able to effectively extract the signal; for this reason, the present application can use optical mutual inductors for signal extraction for transient components with very high frequencies; optical mutual inductors have the advantages of good high-frequency response characteristics, wide dynamic range, and strong anti-electromagnetic interference capabilities, and can more effectively capture transient overvoltage signals. After signal extraction, digital signal processing technology is used to filter, reduce noise, and enhance the signal to improve the signal-to-noise ratio and reliability of the signal.

[0050] The time interval between the two arcings is very short, about 10ms. In the first arcing stage, the system needs to identify and record the arc grounding fault overvoltage in a very short time, and perform spectrum analysis on the signal, calculate the frequency of the high-frequency signal, and then calculate the inductance value of the arc extinguishing coil that needs to be invested. In addition, high-speed data transmission technology and equipment, such as optical fiber communication, Gigabit Ethernet, etc., can be used to increase the data transmission speed and ensure real-time performance. High-performance computing platforms (such as GPU, FPGA, etc.) are then used for parallel computing and accelerated processing to increase the software calculation speed. At the same time, algorithms and data structures are optimized to reduce calculation complexity and time. In actual work, the real-time monitoring system can be used to complete signal recognition, spectrum analysis and inductance value calculation in a very short time between the two arcings. The real-time monitoring system can be implemented using existing technologies, which will not be described in detail here.

[0051] There are many reasons for the arc to be generated, and its combustion process is unstable and may extinguish itself. Each reignition process is different; for this, please refer to Figure 5 As shown, in one embodiment of the present application, the method further comprises:

[0052] S501 obtains the physical characteristics and behavior rules of the arc based on the historical operation data of the power grid system;

[0053] S502 constructs an arc model through a learning algorithm according to the physical characteristics and the behavior rules.

[0054] Specifically, the unstable arc can be solved by the following logic: Establish an arc model: By studying and establishing the physical and mathematical models of the arc, we can deeply understand the characteristics and behavior of the arc, and provide a theoretical basis for predicting and controlling the arc; Adopt an adaptive control strategy: According to the real-time state changes of the arc, an adaptive control strategy is used to adjust the inductance value of the arc extinguishing coil to better adapt to the instability of the arc; Strengthen fault monitoring and early warning: By strengthening the fault monitoring and early warning system, arc faults can be discovered and handled in time to prevent the faults from expanding and worsening.

[0055] Please refer to Figure 6 As shown, in one embodiment of the present application, monitoring and recording arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor further includes:

[0056] S601 monitors and records the operating parameters of the power grid system through an optical mutual inductor;

[0057] S602: obtaining fault type data according to the operating parameters through a preset fault analysis model, and determining whether an arc grounding fault occurs in the power grid system according to the fault type data.

[0058] Furthermore, the method may also include: constructing a sample database based on historical operation data and fault type information of the power grid system; and obtaining a fault analysis model through training of a learning algorithm based on the sample database.

[0059] Specifically, the present application solves the technical problem of how to correctly and quickly identify the type of system failure under the influence of various unstable factors through the following logic:

[0060] Adopt artificial intelligence and machine learning technology: Use artificial intelligence and machine learning technology to train and learn historical fault data and establish a fault identification model. The model can quickly and accurately identify the fault type based on the voltage, current and other signal characteristics collected in real time. Establish a fault database: Establish a detailed fault database to record various fault types and their characteristics. By comparing and analyzing the characteristics of real-time signals with those in the fault database, it can assist in identifying the fault type. Combine with expert system: Combine the knowledge and experience provided by the expert system to further analyze and judge the fault. The expert system can make inferences and decisions based on the fault characteristics and the rules in the expert knowledge base to improve the accuracy and reliability of fault identification.

[0061] In actual work, the implementation process of the arc grounding overvoltage suppression method provided in this application can be referred to Figure 7 As shown, the specific steps are as follows:

[0062] The overvoltage monitoring system collects the operating status of the power grid system to determine whether a fault has occurred; if no fault has occurred, the arc suppression coil is adjusted according to the measured capacitive current to achieve full compensation;

[0063] If a fault occurs, determine whether the arc is overvoltage. If not, the staff will handle it separately. If the arc is overvoltage, measure the capacitor current for spectrum analysis, and adjust the arc extinguishing coil to be in full compensation state according to the analysis results.

[0064] If the arc is extinguished, adjust the arc extinguishing coil according to the measured capacitive current to achieve full compensation; if it is not extinguished, continue the above steps until the arc is extinguished.

[0065] Please refer to Figure 8As shown, the present application also provides a system for suppressing arc-grounding overvoltage, the system comprising an adjustment module, an analysis module and a compensation module; the adjustment module is used to obtain the system's capacitance to ground under normal operating conditions of the power grid system, and adjust the inductance of the arc suppression coil according to the capacitance to ground to make the power grid system leave the resonance area; the analysis module is used to monitor and record the arc current data of the power grid system when an arc-grounding fault occurs through an optical mutual inductor, and perform spectrum analysis on the arc current data to obtain the high-frequency component of the arc current data; the compensation module is used to obtain an adjustment strategy based on the high-frequency component by analyzing the arc model constructed using the arc characteristics, and adjust the inductance of the arc suppression coil according to the adjustment strategy to perform full compensation to offset the arc current.

[0066] In the above embodiment, the analysis module includes: monitoring and recording the arc current signal of the power grid system when an arc grounding fault occurs through an optical mutual inductor; converting the arc current signal into a frequency domain signal, and extracting the frequency domain component of the maximum amplitude in the frequency domain signal through spectrum analysis to obtain arc current data. In another embodiment of the present application, the system further includes a model construction unit, which is used to analyze and obtain the physical characteristics and behavior laws of the arc according to the historical operation data of the power grid system; and construct an arc model through a learning algorithm according to the physical characteristics and the behavior laws. Among them, the analysis module also includes a fault analysis unit, which is used to monitor and record the operating parameters of the power grid system through an optical mutual inductor; obtain fault type data through a preset fault analysis model analysis according to the operating parameters, and determine whether the power grid system has an arc grounding fault according to the fault type data. Further, the system also includes a model construction unit, which is used to construct a sample database according to the historical operation data and fault type information of the power grid system; and obtain a fault analysis model through training with a learning algorithm according to the sample database.

[0067] Since the principle of solving the problem by this system is similar to that of the method for suppressing arc-flash grounding overvoltage, the implementation of this system can refer to the implementation of the method for suppressing arc-flash grounding overvoltage, and the repeated parts will not be repeated.

[0068] The beneficial technical effect of the present application is that it combines the basic principle of an automatic tuning arc suppression coil device, aims to extract the high-frequency component in the arc grounding fault current, and adjust the arc suppression coil according to the extracted high-frequency component for compensation; thereby, improving the safety and power supply reliability of the distribution network system, especially in the face of complex system structures and frequently changing line parameters, and can more effectively suppress the overvoltage problem caused by arc grounding faults.

[0069] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above method when executing the computer program.

[0070] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0071] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0072] like Fig. 9 As shown, the electronic device 600 may further include: a communication module 110, an input unit 120, an audio processor 130, a display 160, and a power supply 170. It is worth noting that the electronic device 600 does not necessarily have to include Fig. 9 In addition, the electronic device 600 may also include Fig. 9 For components not shown, reference may be made to the prior art.

[0073] like Fig. 9 As shown, the central processor 100 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor devices and / or logic devices. The central processor 100 receives inputs and controls the operations of various components of the electronic device 600.

[0074] The memory 140 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory or other suitable devices. The above-mentioned information related to the failure may be stored, and a program for executing the relevant information may also be stored. The CPU 100 may execute the program stored in the memory 140 to implement information storage or processing.

[0075] The input unit 120 provides input to the CPU 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display display objects such as images and text. The display may be, for example, an LCD display, but is not limited thereto.

[0076] The memory 140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It may also be a memory that saves information even when the power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROMs, etc. The memory 140 may also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage unit 142, which is used to store application programs and function programs or processes for executing the operation of the electronic device 600 through the central processor 100.

[0077] The memory 140 may also include a data storage unit (data 143) for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit (driver 144) of the memory 140 may include various drivers for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0078] The communication module 110 is a transmitter / receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter / receiver) 110 is coupled to the central processor 100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

[0079] Based on different communication technologies, multiple communication modules 110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module and / or a wireless LAN module. The communication module (transmitter / receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide an audio output via the speaker 131 and receive an audio input from the microphone 132, thereby realizing a common telecommunication function. The audio processor 130 may include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 130 is also coupled to the central processor 100, so that the sound can be recorded on the local machine through the microphone 132, and the sound stored on the local machine can be played through the speaker 131.

[0080] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0081] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0082] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0083] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0084] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for suppressing arc grounding overvoltage, characterized in that: The method comprises: Acquire the ground capacitance value of the system in the normal operation state of the power grid system, and adjust the inductance value of the arc suppression coil according to the ground capacitance value to make the power grid system leave the resonance area; Monitoring and recording arc current data of the power grid system when an arc grounding fault occurs by means of an optical mutual inductor, and performing spectrum analysis on the arc current data to obtain a high-frequency component of the arc current data; An adjustment strategy is obtained by analyzing an arc model constructed by utilizing arc characteristics according to the high frequency component, and the inductance value of the arc extinguishing coil is adjusted according to the adjustment strategy to perform full compensation to offset the arc current.

2. The method for suppressing arc grounding overvoltage according to claim 1, characterized in that: Monitoring and recording arc current data of the power grid system when an arc grounding fault occurs by optical mutual inductor includes: Monitoring and recording arc current signals of the power grid system when an arc grounding fault occurs by means of an optical mutual inductor; The arc current signal is converted into a frequency domain signal, and the frequency domain component with the maximum amplitude in the frequency domain signal is extracted through spectrum analysis to obtain arc current data.

3. The method for suppressing arc grounding overvoltage according to claim 1, characterized in that: Adjusting the inductance of the arc extinguishing coil according to the adjustment strategy to perform full compensation to offset the arc current also includes: Continuously monitor and record the operation of the power grid system according to a preset period; When an arc grounding fault occurs in the power grid system, the inductance value of the arc extinguishing coil is adjusted according to the arc current data during the arc grounding fault process to perform full compensation to offset the arc current.

4. The method for suppressing arc grounding overvoltage according to claim 1, characterized in that: Adjusting the inductance of the arc extinguishing coil according to the adjustment strategy to perform full compensation to offset the arc current also includes: Continuously monitor and record the operation of the power grid system according to a preset period; When no arc grounding fault occurs in the power grid system within a preset period, the inductance value of the arc suppression coil is adjusted by adjusting the capacitance value to ground so that the power grid system is out of the resonance region.

5. The method for suppressing arc grounding overvoltage according to claim 1, characterized in that: The method further comprises: The physical characteristics and behavior of the arc are obtained by analyzing the historical operation data of the power grid system; An arc model is constructed through a learning algorithm according to the physical characteristics and the behavior rules.

6. The method for suppressing arc grounding overvoltage according to claim 1, characterized in that: Monitoring and recording arc current data of the power grid system when an arc grounding fault occurs by means of an optical mutual inductor further comprises: Monitoring and recording the operating parameters of the power grid system through optical mutual inductors; Fault type data is obtained by analyzing the operating parameters using a preset fault analysis model, and whether an arc grounding fault occurs in the power grid system is determined based on the fault type data.

7. The method for suppressing arc grounding overvoltage according to claim 6, characterized in that: The method further comprises: Construct a sample database based on the historical operation data and fault type information of the power grid system; A fault analysis model is obtained by training a learning algorithm based on the sample database.

8. A system for suppressing arc grounding overvoltage, characterized in that: The system comprises a regulating module, an analyzing module and a compensating module; The regulating module is used to obtain the ground capacitance value of the system in the normal operation state of the power grid system, and adjust the inductance value of the arc suppression coil according to the ground capacitance value to make the power grid system leave the resonance area; The analysis module is used to monitor and record arc current data of the power grid system when an arc grounding fault occurs through an optical mutual inductor, and perform spectrum analysis on the arc current data to obtain high-frequency components of the arc current data; The compensation module is used to obtain an adjustment strategy based on the high-frequency component by analyzing an arc model constructed using arc characteristics, and to adjust the inductance of the arc extinguishing coil according to the adjustment strategy to perform full compensation to offset the arc current.

9. The arc-flash grounding overvoltage suppression system according to claim 8, characterized in that: The analysis module includes: monitoring and recording the arc current signal of the power grid system when an arc grounding fault occurs through an optical mutual inductor; converting the arc current signal into a frequency domain signal, and extracting the frequency domain component with the maximum amplitude in the frequency domain signal through spectrum analysis to obtain arc current data.

10. The arc-flash grounding overvoltage suppression system according to claim 8, characterized in that: The system further comprises a model building unit, which is used to obtain the physical characteristics and behavior laws of the electric arc according to the historical operation data of the power grid system; and to build an electric arc model through a learning algorithm according to the physical characteristics and the behavior laws.

11. The arc-flash grounding overvoltage suppression system according to claim 8, characterized in that: The analysis module also includes a fault analysis unit, which is used to monitor and record the operating parameters of the power grid system through an optical mutual inductor; obtain fault type data through a preset fault analysis model analysis based on the operating parameters, and determine whether an arc grounding fault occurs in the power grid system based on the fault type data.

12. The arc-flash grounding overvoltage suppression system according to claim 11, characterized in that: The system further comprises a model building unit, which is used to build a sample database according to historical operation data and fault type information of the power grid system; and to obtain a fault analysis model through training with a learning algorithm according to the sample database.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

15. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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