Hydropower station suspension type lightning protection system

Abstract

The invention provides a suspension type lightning protection system for a hydropower station. The suspension type lightning protection system comprises a plurality of lightning arrester modules, a sensor module and an analysis processing module, the lightning arrester module is arranged at a preset point position on the electric power circuit and is used for protecting the electric power circuit and reducing lightning stroke damage; the sensor module is installed on a tower of an electric power line, is close to the lightning arrester module, and is used for collecting lightning stroke data and uploading the lightning stroke data to the analysis processing module. And the analysis processing module is used for receiving and analyzing the lightning stroke data so as to determine the working state of the lightning arrester. By analyzing the lightning stroke data, the state of the lightning arrester is determined, excessive loss and failure of the lightning arrester are avoided, and the safety of a power line is improved.

Description

Technical Field

[0001] The present application relates to the field of lightning protection technology, and in particular to a suspended lightning protection system for a hydropower station. Background Art

[0002] As an important power production facility, the safe operation of hydropower stations is of vital importance. Lightning strikes are one of the main natural disasters that affect the safe operation of hydropower station power lines, which may cause insulation breakdown of power lines, equipment damage, and even power outages. Traditional lightning protection measures mainly rely on the installation of lightning arresters, but the operating status monitoring of these lightning arresters usually adopts manual inspections or simple current monitoring methods, which have problems such as low efficiency, poor real-time performance, and inability to detect potential faults in a timely manner. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first purpose of the present application is to provide a suspended lightning protection system for a hydropower station.

[0005] The second objective of the present application is to provide an electronic device.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a suspended lightning protection system for a hydropower station, comprising:

[0007] Multiple lightning arrester modules, sensor modules, and analysis and processing modules;

[0008] The lightning arrester module is arranged at a preset point on the power line to protect the power line and reduce damage caused by lightning strikes;

[0009] The sensor module is installed on the tower of the power line, close to the position of the lightning arrester module, and is used to collect lightning strike data and upload it to the analysis and processing module;

[0010] The analysis and processing module is used to receive and analyze the lightning strike data to determine the state of the lightning arrester module.

[0011] Optionally, the lightning arrester module is arranged on a base tower on the power line, located on the line with the lowest height in the tower base, and the distances between adjacent lightning arrester modules are the same.

[0012] Optionally, the arrester module includes:

[0013] Arrester body, bent plate, U-bolt, U-shaped hanging ring, insulating base, bowl head hanging plate, ball head hanging ring, supporting insulator discharge ring, suspension wire clamp, counter, equalizing ring.

[0014] Optionally, the sensor module includes a plurality of lightning monitoring sensors, and the lightning monitoring sensors are used to record current amplitude data, waveform data and corresponding time.

[0015] Optionally, the analysis and processing module is used to screen the current data to obtain a target time period in which the current change exceeds a threshold;

[0016] The current data in the target time period is subjected to wavelet transformation to determine the time point corresponding to the fault wave head as the time point of the lightning strike.

[0017] Optionally, the analysis and processing module is used to count the number of lightning strikes, and obtain the lightning strike frequency corresponding to each of the lightning arrester modules according to the analysis of the number of lightning strikes;

[0018] The waveform area is calculated based on the waveform data of each lightning strike as the intensity of the lightning strike.

[0019] Optionally, the analysis and processing module is used to determine the arrester loss based on the lightning strike frequency and lightning strike intensity of the arrester module. If the loss is higher than a preset threshold, the arrester module is determined to be in an overload state and needs to be replaced with a new arrester module.

[0020] To achieve the above-mentioned purpose, a second aspect of the present application provides an electronic device, comprising: a processor, and a memory communicatively connected to the processor;

[0021] The memory stores computer-executable instructions;

[0022] The processor executes the computer-executable instructions stored in the memory to implement the system as described in any one of the first aspects.

[0023] The suspended lightning protection system for a hydropower station provided in the present application determines the state of the lightning arrester by analyzing lightning strike data, avoids excessive wear and failure of the lightning arrester, and improves the safety of the power line.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A schematic structural diagram of a suspended lightning protection system for a hydropower station provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0028] The embodiment of the present application provides a suspended lightning protection system for a hydropower station. Figure 1 This is a schematic diagram of the structure of a suspended lightning protection system for a hydropower station provided in an embodiment of the present application. Figure 1 As shown, the system includes:

[0029] A plurality of lightning arrester modules 10, a sensor module 20, and an analysis and processing module 30;

[0030] The lightning arrester module is arranged at a preset point on the power line to protect the power line and reduce damage caused by lightning strikes;

[0031] The sensor module is installed on the tower of the power line, close to the position of the lightning arrester module, and is used to collect lightning strike data and upload it to the analysis and processing module;

[0032] The analysis and processing module is used to receive and analyze the lightning strike data to determine the state of the lightning arrester module.

[0033] In this embodiment, the arrester is a device used to protect electrical equipment from damage caused by lightning overvoltage and operating overvoltage. Its core principle is to limit the amplitude of overvoltage through nonlinear resistance materials (such as zinc oxide resistors), thereby protecting the safe operation of electrical equipment. The core component of the arrester is nonlinear resistance material, and most modern arresters use zinc oxide resistors (ZnO). Zinc oxide resistors have unique volt-ampere characteristics:

[0034] Under normal operating voltage (such as grid operating voltage), the zinc oxide resistor is in a high resistance state and conducts almost no current, so it will not affect the normal operation of the grid.

[0035] When the voltage rises to a certain value (such as lightning overvoltage or operating overvoltage), the resistance value of the zinc oxide resistor will drop sharply, presenting a low resistance state, thereby allowing large current to pass.

[0036] When lightning overvoltage or operating overvoltage occurs, the voltage amplitude is much higher than the normal operating voltage of the power grid. At this time, the resistance value of the zinc oxide resistor decreases rapidly, allowing large current to pass. The lightning arrester protects the equipment in the following ways:

[0037] Discharge current: The excess energy generated by overvoltage is discharged to the ground through the lightning arrester, thereby limiting the amplitude of the overvoltage.

[0038] Limiting voltage: The residual voltage of the arrester (i.e. the voltage when the arrester is turned on) is much lower than the insulation withstand voltage of the equipment, thus protecting the equipment from damage due to overvoltage.

[0039] The residual voltage of the arrester refers to the voltage across the arrester when a certain amplitude of lightning impulse current passes through it. The lower the residual voltage, the higher the level of protection the arrester provides to the equipment. Modern zinc oxide arresters usually have a low residual voltage and can effectively protect equipment.

[0040] Optionally, the lightning arrester module is arranged on a base tower on the power line, located on the line with the lowest height in the tower base, and the distances between adjacent lightning arrester modules are the same.

[0041] Optionally, the arrester module includes:

[0042] Arrester body, bent plate, U-bolt, U-shaped hanging ring, insulating base, bowl head hanging plate, ball head hanging ring, supporting insulator discharge ring, suspension wire clamp, counter, equalizing ring.

[0043] In this embodiment, the arrester module 10 adopts a synthetic jacket zinc oxide arrester, which has the characteristics of lightness, aging resistance, strong energy absorption capacity, etc. The arrester module 10 is suspended on the transmission line tower through the high-voltage end hardware and the grounding end hardware, and is connected in series and parallel with the line insulator. The arrester body is composed of multiple units connected in series, with a high-current small-size zinc oxide resistor inside, and a silicone rubber shed outside, which has strong dirt resistance.

[0044] Optionally, the sensor module includes a plurality of lightning monitoring sensors, and the lightning monitoring sensors are used to record current amplitude data, waveform data and corresponding time.

[0045] In this embodiment, the lightning monitoring sensor is a device used to monitor and record lightning events in real time. It is widely used in power systems, communication base stations, petrochemical facilities, transportation systems and other fields to evaluate the potential damage of lightning strikes to equipment and optimize lightning protection measures.

[0046] Lightning strike monitoring sensors mainly monitor lightning strike events through the following principles:

[0047] Principle of electromagnetic induction: When lightning current passes through a conductor, it will produce instantaneous voltage fluctuations or electromagnetic field changes. The sensor records the lightning strike event by sensing these changes.

[0048] Magnetic field monitoring principle: Utilize the magnetic field changes generated when lightning passes through a conductor for monitoring. For example, Jomitek's lightning monitoring sensor determines whether a lightning strike occurs by measuring the magnetic field signals on both sides of the tower base.

[0049] Current waveform monitoring: High-precision sensors are used to capture the waveform, peak value, polarity and other parameters of lightning current, so as to conduct detailed analysis of lightning strike events.

[0050] The technical specifications of lightning strike monitoring sensors vary depending on the application scenario and design. The following are some common parameters:

[0051] Measuring range: usually covers lightning currents from tens of amperes to 100kA.

[0052] Measurement accuracy: generally around ±10%.

[0053] Data storage and transmission: Supports local storage and remote transmission. Some devices can store up to 60 pieces of lightning current waveform data.

[0054] Communication mode: Support multiple communication modes such as RS-485, wireless (such as NB-IoT, LoRa), TCP / IP, etc.

[0055] Environmental adaptability: Able to work in the temperature range of -40℃ to 85℃, with protection grade up to IP67.

[0056] Power consumption: Low power consumption design, static power consumption as low as 20mA.

[0057] Optionally, the analysis and processing module is used to screen the current data to obtain a target time period in which the current change exceeds a threshold;

[0058] The current data in the target time period is subjected to wavelet transformation to determine the time point corresponding to the fault wave head as the time point of the lightning strike.

[0059] In this embodiment, determining the occurrence of a lightning strike event based on current data mainly relies on analyzing and monitoring the waveform characteristics of the lightning strike current.

[0060] Lightning current has unique waveform characteristics, usually showing a transient signal with rapid rise and rapid decay. The following are the key parameters:

[0061] Peak current: The amplitude of lightning current is usually very high, reaching tens of kiloamperes.

[0062] Wavefront steepness: The rate of rise of lightning current (wavefront steepness) is very fast, usually in the microsecond level.

[0063] Energy and charge: The amount of energy and charge released during a lightning strike is large, and these parameters can be recorded by sensors.

[0064] Lightning Strike Identification Based on Wavelet Analysis

[0065] Wavelet analysis is an effective method for extracting lightning strike features from complex current signals:

[0066] High-frequency signal analysis: The high-frequency signal of lightning fault current is mainly concentrated in the wave head. Through wavelet transform, the fault wave head can be locked and the time of lightning strike can be determined.

[0067] Energy distribution characteristics: The energy of the lightning signal is concentrated near the wave head and then decays rapidly. This energy distribution characteristic can be used to distinguish lightning events from other faults.

[0068] Optionally, the analysis and processing module is used to count the number of lightning strikes, and obtain the lightning strike frequency corresponding to each of the lightning arrester modules according to the analysis of the number of lightning strikes;

[0069] The waveform area is calculated based on the waveform data of each lightning strike as the intensity of the lightning strike.

[0070] In this embodiment, the intensity of the lightning current can be estimated by a calculation method, and its evaluation is usually based on the following parameters:

[0071] Peak current: The maximum amplitude of lightning current, which is a key indicator to measure the intensity of lightning strike.

[0072] Wavefront steepness: The rate of rise of lightning current, often used to distinguish lightning strikes from other overcurrent events.

[0073] Energy and Charge: By integrating the lightning current waveform, the energy and charge released in a lightning strike can be calculated.

[0074] Optionally, the analysis and processing module is used to determine the arrester loss based on the lightning strike frequency and lightning strike intensity of the arrester module. If the loss is higher than a preset threshold, the arrester module is determined to be in an overload state and needs to be replaced with a new arrester module.

[0075] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the system provided by the above embodiments.

[0076] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the system provided by the above embodiments.

[0077] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the system provided by the above embodiments when executed by a processor.

[0078] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0079] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0080] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0081] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0082] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0083] Any process or system description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0084] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0085] It should be understood that the various parts of the present application can be implemented with hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or systems can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented with hardware, as in another embodiment, it can be implemented with any one of the following technologies known in the art or their combination: a discrete logic circuit with a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit with a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0086] A person skilled in the art may understand that all or part of the steps of the system implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the system embodiment.

[0087] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0088] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A suspended lightning protection system for a hydropower station, characterized in that: include: Multiple lightning arrester modules, sensor modules, and analysis and processing modules; The lightning arrester module is arranged at a preset point on the power line to protect the power line and reduce damage caused by lightning strikes; The sensor module is installed on the tower of the power line, close to the position of the lightning arrester module, and is used to collect lightning strike data and upload it to the analysis and processing module; The analysis and processing module is used to receive and analyze the lightning strike data to determine the state of the lightning arrester module.

2. The system according to claim 1, characterized in that The lightning arrester module is arranged on the base tower on the power line, located on the line with the lowest height in the tower base, and the distances between adjacent lightning arrester modules are the same.

3. The system according to claim 2, characterized in that The arrester module comprises: Arrester body, bent plate, U-bolt, U-shaped hanging ring, insulating base, bowl head hanging plate, ball head hanging ring, supporting insulator discharge ring, suspension wire clamp, counter, equalizing ring.

4. The system according to claim 3, characterized in that The sensor module includes a plurality of lightning monitoring sensors, and the lightning monitoring sensors are used to record current amplitude data, waveform data and corresponding time.

5. The system according to claim 4, characterized in that The analysis and processing module is used to screen the current data and obtain a target time period in which the current change exceeds a threshold value; The current data in the target time period is subjected to wavelet transformation to determine the time point corresponding to the fault wave head as the time point of the lightning strike.

6. The system according to claim 5, characterized in that The analysis and processing module is used to count the number of lightning strikes, and obtain the lightning strike frequency corresponding to each of the lightning arrester modules according to the analysis of the number of lightning strikes; The waveform area is calculated based on the waveform data of each lightning strike as the intensity of the lightning strike.

7. The system according to claim 6, characterized in that The analysis and processing module is used to determine the arrester loss according to the lightning strike frequency and the intensity of the lightning strike of the arrester module. If the loss is higher than a preset threshold, it is determined that the state of the arrester module is an overload state and a new arrester module needs to be replaced.

8. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the system according to any one of claims 1 to 7.

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