A wind farm active secondary side lightning protection method and related device

Abstract

The application provides a wind farm active secondary side lightning strike protection method and related device, and belongs to the technical field of lightning protection and surge protection. The device comprises an electric field intensity sensor, a lightning strike full-wave monitoring module, an electronic controllable switch and a data acquisition module; the electric field intensity sensor is used for collecting atmospheric electric field intensity, the lightning strike full-wave monitoring module is used for collecting lightning strike full-wave data, the electronic controllable switch is arranged at the input side of a surge protector, and the data acquisition module is connected with the electric field intensity sensor and the lightning strike full-wave monitoring module; the electronic controllable switch is closed to put the surge protector into the system when there is a lightning strike risk according to the judgment result of the atmospheric electric field intensity and the lightning strike full-wave data, and is kept open to make the surge protector in an offline and unloaded state when there is no lightning strike risk. The application realizes active input and removal of the surge protector, avoids the aging failure problem caused by long-term loading of the passive surge protector, and improves the lightning protection reliability and operation safety of the secondary side system of the wind farm.

Description

Technical Field

[0001] This invention belongs to the field of lightning protection and surge protection technology, and relates to an active secondary side lightning protection method and related devices for wind farms. Background Technology

[0002] Currently, lightning protection for secondary systems in wind farms mainly employs passive surge protection devices. Commonly used passive components include varistors, transient voltage suppressor diodes, and gas discharge tubes. Since these devices are passive protection components, they cannot predict or actively intervene in lightning strike risks.

[0003] SPDs (Sustainable Power Distribution Devices) are electrical safety protection products. However, when providing surge protection for equipment, their surge protection capability decreases with the number of activations, eventually leading to failure due to lightning energy overload. Furthermore, with prolonged use under load, SPDs can also fail due to increased leakage current. Failure can cause signal interruptions and loss of control over the entire wind power system, or further damage to equipment due to subsequent lightning strikes. Either way, this results in significant economic losses to wind power, and in more serious cases, the wind power system may become uncontrollable, causing damage to the surrounding ecological environment.

[0004] Therefore, there is an urgent need for a protective device that can detect lightning strike risks in advance and actively control the activation and deactivation of SPDs to overcome the problem of aging failure or performance degradation of existing passive SPDs during long-term load operation, and improve the lightning protection reliability and operational safety of the secondary side system of wind farms. Summary of the Invention

[0005] The purpose of this invention is to provide an active secondary side lightning protection method and related device for wind farms, which solves the technical problem in the prior art where the SPD (Special Purpose Device) fails due to aging or degrades under long-term load, causing the load condition to affect the operation of the protected system.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides an active secondary-side lightning protection method for wind farms, comprising the following steps: Acquire atmospheric electric field strength and full waveform data of lightning strikes in the environment where the secondary side lines of the wind farm are located; Based on the acquired atmospheric electric field strength and lightning full waveform data, determine whether there is a risk of lightning strike; When a lightning strike risk is identified, active lightning protection is implemented.

[0007] Preferably, based on the acquired atmospheric electric field strength and lightning full waveform data, the existence of lightning strike risk is determined. The specific method is as follows: The collected atmospheric electric field strength and lightning full waveform data are compared with preset thresholds to determine whether there is a risk of lightning strike.

[0008] Secondly, the present invention provides an active secondary-side lightning protection system for wind farms, comprising: The data acquisition unit is used to acquire atmospheric electric field strength and lightning full waveform data of the environment in which the secondary side lines of the wind farm are located; The lightning strike risk assessment unit is used to determine whether there is a lightning strike risk based on the acquired atmospheric electric field strength and lightning full waveform data. The lightning protection unit is used to provide active lightning protection when a lightning strike risk is detected.

[0009] Thirdly, the present invention provides an active secondary-side lightning protection device for wind farms, comprising: Electric field strength sensor, used to collect atmospheric electric field strength of the environment where the secondary side lines of wind farm are located; Lightning full-wave monitoring module, used to collect full waveform data of lightning strikes; Surge protectors are installed at the input end of the protected electrical equipment; An electronically controllable switch is installed on the input side of the surge protector; The control unit is used to control the operation of the electronically controllable switch based on the collected atmospheric electric field strength and lightning full waveform data.

[0010] Preferably, the electric field strength sensor is a solid-state electric field probe, which is installed on the top of the fan.

[0011] Preferably, the electronically controllable switch is an electronic switch or an RF electronic switch.

[0012] Preferably, the surge protector includes an overvoltage protection device and / or an overcurrent protection device.

[0013] Fourthly, the present invention provides an electronic device including a processor and a memory, wherein the memory stores computer instructions, and when the computer instructions are executed by the processor, the electronic device performs the method described thereon.

[0014] Fifthly, the present invention provides a computer program product, the computer program product including computer-executable instructions, which, when executed, implement the method described.

[0015] In a sixth aspect, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, implement the method described herein.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention provides an active secondary-side lightning protection method for wind farms. By installing an electronically controllable switch on the input side of a surge protector (SPD), and controlling the opening and closing of this switch based on atmospheric electric field strength and lightning full-wave waveform data collected by an electric field strength sensor and a lightning full-wave monitoring module, active activation and deactivation of the SPD is achieved. When there is no lightning risk, the SPD is in an offline, unloaded state, thus completely avoiding the aging and failure problems caused by increased leakage current and accumulated lightning energy overload in traditional passive SPDs during long-term load operation, significantly extending the service life of the SPD. Furthermore, the dual-channel monitoring structure, especially the solid-state electric field probe which can be installed on the top of the wind turbine without strict requirements on surrounding metal obstructions, further enhances the protection. This system overcomes the installation limitations of traditional atmospheric electric field meters, which are unsuitable for wind farms. Furthermore, the lightning strike full-wave monitoring module boasts a high sampling rate of at least 10MHz per channel, enabling the acquisition of the true and complete waveform of the first lightning strike. Compared to traditional hysteresis monitoring methods based on leakage coils or Hall coils, this system achieves early and accurate perception of lightning strike risks, improving the reliability and response speed of early warnings. When a lightning strike risk is detected, the electronically controllable switch closes to connect the SPD to the system, enabling timely activation of lightning protection functions before a lightning strike. Once the risk is eliminated, the switch opens, taking the SPD offline. This ensures effective protection of the wind power secondary system under lightning conditions while avoiding the impact or interference caused by the SPD being online for extended periods on the normal operation of the protected system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the process of the present invention. Detailed Implementation

[0018] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0019] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0020] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0022] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0024] Example 1 This embodiment provides an active secondary-side lightning protection device for wind farms, comprising: Electric field strength sensor, used to collect atmospheric electric field strength of the environment where the secondary side lines of wind farm are located; Lightning full-wave monitoring module, used to collect full waveform data of lightning strikes; Surge protectors are installed at the input end of the protected electrical equipment; An electronically controllable switch is installed on the input side of the surge protector; An external host is used to control the operation of the electronically controllable switch based on the collected atmospheric electric field strength and lightning full waveform data.

[0025] In this embodiment, the external host is connected to the electric field strength sensor and the lightning full-wave monitoring module through the data acquisition module.

[0026] In this embodiment, the electric field strength sensor is a solid-state electric field probe, which is installed on the top of the fan.

[0027] In this embodiment, the electronically controllable switch is an electronic switch or an RF electronic switch.

[0028] In this embodiment, the surge protector includes an overvoltage protection device and / or an overcurrent protection device.

[0029] In this embodiment, the electric field strength sensor is powered by 5-24V.

[0030] In this embodiment, the data acquisition unit can transmit data to an external host via various transmission methods such as 485 bus signal, NB-IoTs, and 5G / 4G.

[0031] Example 2 This embodiment provides an active secondary-side lightning protection method for wind farms, including the following steps: Acquire atmospheric electric field strength and full waveform data of lightning strikes in the environment where the secondary side lines of the wind farm are located; Based on the acquired atmospheric electric field strength and lightning full waveform data, determine whether there is a risk of lightning strike; In this embodiment, the collected atmospheric electric field strength and lightning full waveform data are compared with preset thresholds to determine whether there is a risk of lightning strike.

[0032] When a lightning strike risk is detected, the electronically controllable switch located on the input side of the surge protector is closed, and the surge protector is put into the system to achieve active lightning strike protection.

[0033] When it is determined that there is no risk of lightning strike, the electronic controllable switch is kept in the open state, so that the surge protector is in an offline and unloaded state.

[0034] Example 3 This embodiment provides an active secondary-side lightning protection system for wind farms, comprising: The data acquisition unit is used to acquire atmospheric electric field strength and lightning full waveform data of the environment in which the secondary side lines of the wind farm are located; The lightning strike risk assessment unit is used to determine whether there is a lightning strike risk based on the acquired atmospheric electric field strength and lightning full waveform data. The lightning protection unit is used to provide active lightning protection when a lightning strike risk is detected.

[0035] Example 4 This embodiment also provides a computing device. The computing device includes a bus, a processor, a memory, and a communication interface. The processor, memory, and communication interface communicate with each other via the bus. The computing device can be a server or a terminal device. It should be understood that this application does not limit the number of processors and memory in the computing device.

[0036] A bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, a bus can include a path for transmitting information between various components of a computing device (e.g., memory, processor, communication interfaces).

[0037] The processor may include any one or more of the following: central processing unit (CPU), graphics processing unit (GPU), tensor processing unit (TPU), application specific integrated circuit (ASIC), field-programmable gate array (FPGA), microprocessor (MP), or digital signal processor (DSP).

[0038] Memory can include volatile memory, such as random access memory (RAM). Processors can also include non-volatile memory. volatile memory, such as read-only memory (ROM). ROM (memory only), flash memory, hard disk drive (HDD), or solid state drive (SSD).

[0039] The memory stores executable program code, which the processor executes to implement the functions of the aforementioned units, thereby achieving, for example, the method described in Embodiment 1. That is, the memory may store instructions for the methods and functions relating to the computing device in any of the above embodiments.

[0040] The communication interface uses transceiver modules such as, but not limited to, network interface cards and transceivers to enable communication between computing devices and other devices or communication networks.

[0041] Example 5 This embodiment also provides a computer-readable storage medium storing computer instructions that, when executed by a processor, cause the processor to perform the methods and functions of the computing device involved in any of the above embodiments.

[0042] Generally, the various embodiments of this disclosure can be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects can be implemented in hardware, while others can be implemented in firmware or software, which can be executed by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of this disclosure are shown and described as block diagrams, flowcharts, or represented using some other illustration, it should be understood that the blocks, apparatuses, systems, techniques, or methods described herein can be implemented as, as non-limiting examples, in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or some combination thereof.

[0043] Example 6 This embodiment provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, which execute in a device on a target real or virtual processor to perform the processes / methods as described above with reference to the accompanying drawings. Typically, program modules include routines, programs, libraries, objects, classes, components, data structures, etc., that perform specific tasks or implement specific abstract data types. In various embodiments, the functionality of program modules can be combined or divided among program modules as needed. The machine-executable instructions for the program modules can execute within a local or distributed device. In a distributed device, the program modules can reside in both local and remote storage media.

[0044] Computer program code used to implement the methods of this disclosure may be written in one or more programming languages. This computer program code may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus, such that when executed by the computer or other programmable data processing apparatus, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be performed. The program code may be executed entirely on a computer, partially on a computer, as a stand-alone software package, partially on a computer and partially on a remote computer, or entirely on a remote computer or server.

[0045] In the context of this disclosure, computer program code or related data may be carried on any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of carriers include signals, computer-readable media, and so on. Examples of signals may include electrical, optical, radio, sound, or other forms of propagation signals, such as carrier waves, infrared signals, etc.

[0046] Computer-readable media can be any tangible medium that contains or stores programs for or relating to an instruction execution system, apparatus, or device, or a data storage device such as a data center containing one or more available media. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. More detailed examples of computer-readable storage media include electrical connections with 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 storage devices, magnetic storage devices, or any suitable combination thereof.

[0047] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for active secondary-side lightning protection in wind farms, characterized in that, Includes the following steps: Acquire atmospheric electric field strength and full waveform data of lightning strikes in the environment where the secondary side lines of the wind farm are located; Based on the acquired atmospheric electric field strength and lightning full waveform data, determine whether there is a risk of lightning strike; When a lightning strike risk is identified, active lightning protection is implemented.

2. The active secondary-side lightning protection method for wind farms according to claim 1, characterized in that, Based on the acquired atmospheric electric field strength and lightning full waveform data, the existence of lightning strike risk is determined. The specific method is as follows: The collected atmospheric electric field strength and lightning full waveform data are compared with preset thresholds to determine whether there is a risk of lightning strike.

3. An active secondary-side lightning protection system for wind farms, characterized in that, include: The data acquisition unit is used to acquire atmospheric electric field strength and lightning full waveform data of the environment in which the secondary side lines of the wind farm are located; The lightning strike risk assessment unit is used to determine whether there is a lightning strike risk based on the acquired atmospheric electric field strength and lightning full waveform data. The lightning protection unit is used to provide active lightning protection when a lightning strike risk is detected.

4. An active secondary-side lightning protection device for wind farms, characterized in that, include: Electric field strength sensor, used to collect atmospheric electric field strength of the environment where the secondary side lines of wind farm are located; Lightning full-wave monitoring module, used to collect full waveform data of lightning strikes; Surge protectors are installed at the input end of the protected electrical equipment; An electronically controllable switch is installed on the input side of the surge protector; The control unit is used to control the operation of the electronically controllable switch based on the collected atmospheric electric field strength and lightning full waveform data.

5. The active secondary-side lightning protection device for wind farms according to claim 4, characterized in that, The electric field strength sensor is a solid-state electric field probe, which is installed on the top of the fan.

6. The active secondary-side lightning protection device for wind farms according to claim 4, characterized in that, The electronically controllable switch is an electronic switch or an RF electronic switch.

7. The active secondary-side lightning protection device for wind farms according to claim 4, characterized in that, The surge protector includes overvoltage protection devices and / or overcurrent protection devices.

8. An electronic device, characterized in that, The device includes a processor and a memory, the memory storing computer instructions that, when executed by the processor, cause the electronic device to perform the method of claim 1.

9. A computer program product, characterized in that, The computer program product contains computer-executable instructions that, when executed, implement the method of claim 1.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when executed by a processor, implement the method of claim 1.

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