Intelligent fault detection device based on small current line selection

Abstract

The invention provides an intelligent fault detection device based on small current line selection, and relates to the technical field of electrical automation. The device comprises an external zero sequence current transformer, a data acquisition device, a secondary zero sequence (three-phase) voltage acquisition device, a data conversion module, a power calculation module, a wireless signal transceiving module, a central control circuit board, a power supply module, an LED display screen and a physical button. Through data acquisition, data conversion, power calculation and wireless signal transmission, intelligent detection and analysis of small-current grounding faults are realized. The device has the characteristics of intelligent analysis, portability in operation, high detection precision and strong adaptability, can effectively overcome the defects of heavy weight, complex operation and lack of intelligent analysis of traditional detection equipment, and improves the efficiency and accuracy of fault detection.

Description

Technical Field

[0001] The invention relates to the technical field of electrical automation, and in particular to an intelligent fault detection device based on small current line selection. Background Art

[0002] At present, in the power system, the small current grounding system is widely used in the distribution network. However, the existing small current grounding fault detection technology has many problems and shortcomings, which are mainly manifested in the following aspects: Since the fault current in the low-current grounding system is small, the traditional detection method has a large defect in detection accuracy and it is often difficult to accurately locate the fault point. This leads to misjudgment or missed judgment during the troubleshooting process, increasing the complexity of system maintenance.

[0003] Existing detection equipment lacks flexibility when dealing with different grounding methods. It is usually only applicable to specific grounding scenarios and is difficult to perform effective fault detection in different environments and conditions. This poor adaptability limits the equipment in actual use and makes it difficult to meet the complex and changing needs of power systems.

[0004] Traditional small current grounding detection equipment is usually large and heavy, requires multiple data lines to connect, and is complicated to operate, which brings great inconvenience to the operation and carrying of on-site workers. This bulky design seriously affects the efficiency of fault detection, especially in situations where rapid response is required, and the operation is difficult.

[0005] Existing fault detection equipment can usually only provide basic detection data, lacking the ability to further intelligently analyze and process the data. Operators need to rely on their own experience and expertise to determine the location and cause of the fault, which increases the technical dependence on the operator and is easily affected by human factors, reducing the accuracy and efficiency of detection. Summary of the invention

[0006] An intelligent fault detection device based on small current line selection comprises an external zero-sequence current transformer, a data acquisition device, a secondary zero-sequence (three-phase) voltage acquisition device, a secondary zero-sequence current transformer, a data conversion module, a power calculation module, a wireless signal transceiver module, a central control circuit board, a power module, an LED display screen and a physical button. The secondary zero-sequence three-phase voltage acquisition device comprises a voltage transformer and an open triangle voltage acquisition module.

[0007] Furthermore, the external zero-sequence current transformer is connected to a data acquisition device.

[0008] Furthermore, the data acquisition device acquires data of zero-sequence current and zero-sequence voltage.

[0009] Furthermore, the secondary zero-sequence current transformer collects the secondary zero-sequence current.

[0010] Furthermore, the data conversion module converts the data collected by the data collection device.

[0011] Furthermore, the power calculation module is connected to the central control circuit board to perform power calculation on the collected data.

[0012] Furthermore, the wireless signal transceiver module transmits the data to the mobile phone software.

[0013] Furthermore, the central control circuit board is connected to a power module.

[0014] Furthermore, the LED display screen is connected to a central control circuit board.

[0015] Furthermore, the physical button is connected to the central control circuit board.

[0016] Compared with the prior art, the present invention has the following advantages: Improve detection accuracy: This device combines an external zero-sequence current transformer with a data acquisition device to collect the amplitude and phase angle of zero-sequence current and zero-sequence voltage in real time, and uses a power calculation module to further calculate the data, thereby improving detection accuracy.

[0017] Enhanced adaptability: The secondary zero-sequence (three-phase) voltage acquisition device in this device includes a voltage transformer and an open triangle voltage acquisition module, which can adapt to the fault detection requirements of different grounding methods, increasing the flexibility and applicability of the equipment.

[0018] Improve portability and ease of operation: This device converts data into wireless signals and transmits them to the mobile phone software through a wireless signal transceiver module, eliminating the trouble of data cable connection in traditional devices, greatly reducing the weight of the device and improving the convenience of operation.

[0019] Realize intelligent analysis: This device uses a central control circuit board and a wireless signal transceiver module, combined with the software processing capabilities of the mobile phone, to perform intelligent analysis on the collected data and perform logic verification, thereby achieving rapid judgment of faults, reducing dependence on the operator's professional knowledge, and improving detection efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; In the figure: 1. External zero-sequence current transformer; 2. Data acquisition device; 3. Secondary zero-sequence (three-phase) voltage acquisition device; 4. Secondary zero-sequence current transformer; 5. Data conversion module; 6. Power calculation module; 7. Wireless signal transceiver module; 8. Central control circuit board; 9. Power module; 10. LED display; 11. Physical button. DETAILED DESCRIPTION

[0021] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and is not a limitation of the scope of protection, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed can be changed without departing from the scope of protection of the contents of this specification. Various examples can omit, replace or add various processes or components as needed. For example, the described method can be performed in an order different from the described order, and various steps can be added, omitted or combined. In addition, the features described relative to some examples can also be combined in other examples.

[0022] As used herein, the term "including" and its variations represent open terms, meaning "including but not limited to". The term "based on" means "based at least in part on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other definitions may be included below, whether explicit or implicit. Unless the context clearly indicates otherwise, the definition of a term is consistent throughout the specification.

[0023] Example An intelligent fault detection device based on small current line selection comprises an external zero-sequence current transformer 1, a data acquisition device 2, a secondary zero-sequence (three-phase) voltage acquisition device 3, a secondary zero-sequence current transformer 4, a data conversion module 5, a power calculation module 6, a wireless signal transceiver module 7, a central control circuit board 8, a power module 9, an LED display screen 10 and a physical button 11, wherein the secondary zero-sequence (three-phase) voltage acquisition device 3 comprises a voltage transformer and an open triangle voltage acquisition module.

[0024] Furthermore, the external zero-sequence current transformer 1 is connected to the data acquisition device 2 .

[0025] Furthermore, the data acquisition device 2 acquires data of zero-sequence current and zero-sequence voltage.

[0026] Furthermore, the secondary zero-sequence current transformer 4 collects the secondary zero-sequence current.

[0027] Furthermore, the data conversion module 5 converts the data collected by the data collection device 2 .

[0028] Furthermore, the power calculation module 6 is connected to the central control circuit board 8 to perform power calculation on the collected data.

[0029] Furthermore, the wireless signal transceiver module 7 transmits the data to the mobile phone software.

[0030] Furthermore, the central control circuit board 8 is connected to the power module 9 .

[0031] Furthermore, the LED display screen 10 is connected to the central control circuit board 8 .

[0032] Furthermore, the physical button 11 is connected to the central control circuit board 8 .

[0033] The overall operation process and specific principles are as follows: The external zero-sequence current transformer 1 is used to collect the zero-sequence current signal in the primary system, and the secondary zero-sequence current transformer 4 is used to collect the zero-sequence current signal in the secondary system. The secondary zero-sequence (three-phase) voltage acquisition device 3 is responsible for collecting the three-phase voltage and open triangle voltage in the power system. These voltage signals are used to analyze the operating status of the system. The data acquisition device 2 is responsible for collecting the current and voltage data provided by the above transformers and acquisition devices, and preliminarily organizes the data for subsequent processing.

[0034] The zero-sequence current and voltage signals collected by the data acquisition device 2 will be converted into a format through the data conversion module 5. Since the collected data types are diverse, including amplitude, phase angle and other information, they need to be converted into a unified data format for processing by the power calculation module and the wireless signal module. The data conversion module 5 converts analog signals into digital signals to ensure the accuracy and transmittability of the data.

[0035] The zero-sequence current and voltage data after data conversion are transmitted to the power calculation module 6. The power calculation module 6 calculates these data to obtain the power amplitude and phase angle of the zero-sequence current and zero-sequence voltage. These calculations help to further determine the location and type of the fault, such as determining which phase or area the fault occurs in.

[0036] The data after power calculation will be transmitted through the wireless signal transceiver module 7. The wireless signal transceiver module 7 converts the data into wireless signals and sends them to the mobile phone software. This method saves a lot of data line connections in traditional devices, making the whole system more portable and easy to operate. The mobile phone software receives these data in real time to ensure that the operator can check the system status at any time.

[0037] The central control circuit board 8 is responsible for coordinating the various modules of the entire system to ensure that all links from data collection to processing proceed smoothly. The software on the mobile phone has an intelligent analysis function, which can further process the received zero-sequence current and voltage data, such as logic verification, polarity judgment, etc. Through these analyses, the system can determine whether there is a ground fault, the nature of the fault and the specific location. This intelligent analysis reduces the error of human judgment and ensures the accuracy of the detection results.

[0038] At the same time, the LED display screen 10 can display the operating status of the device in real time, including power status, signal strength and fault information, so that the on-site operator can quickly understand the operating status of the device. The physical button 11 is used for basic operations of the device, such as starting, stopping, mode switching, etc.

[0039] The power module 9 provides stable power support for the entire device. Since the device contains multiple modules, the power supply needs to be reasonably distributed to ensure that each module can operate stably. The power module 9 has an overload protection function to prevent damage to the device due to external power problems and ensure the reliability and safety of the device.

[0040] Each module operates in an orderly manner under the coordination of the central control circuit board 8 to ensure smooth connection between each step.

[0041] During the fault detection process, the device first collects data through an external transformer, and after data conversion and calculation, the results are sent to the mobile phone for display and analysis through wireless transmission. The whole process is efficient and convenient, greatly improving the efficiency and accuracy of fault detection.

[0042] Through the above detailed operation process, this device can perform comprehensive detection and judgment of small current grounding faults. Combined with intelligent data processing and portable design, it has extremely high practicality and reliability in power system fault detection.

[0043] Those skilled in the art should understand that the various embodiments disclosed above can be changed and modified in various ways without departing from the essence of the invention. Therefore, the protection scope of the present invention should be defined by the appended claims.

[0044] It should be noted that not all steps and units in the above processes are necessary, and some steps or units can be ignored according to actual needs. The execution order of each step is not fixed and can be determined as needed. The device structure described in the above embodiments can be a physical structure or a logical structure, that is, some units may be implemented by the same physical entity, or some units may be implemented by multiple physical entities, or some components in multiple independent devices may be implemented together.

[0045] The specific embodiments set forth above describe exemplary embodiments, but do not represent all embodiments that may be implemented or fall within the scope of protection of the claims. The term "exemplary" used throughout this specification means "used as an example, instance, or illustration" and does not mean "preferred" or "having advantages" over other embodiments. For the purpose of providing an understanding of the described techniques, the specific embodiments include specific details. However, these techniques may be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0046] The above description of the present disclosure is provided to enable any person of ordinary skill in the art to implement or use the present disclosure. Various modifications to the present disclosure will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is consistent with the widest range of principles and novel features disclosed herein.

Claims

1. An intelligent fault detection device based on low current line selection, comprising an external zero-sequence current transformer (1), a data acquisition device (2), a secondary zero-sequence (three-phase) voltage acquisition device (3), a secondary zero-sequence current transformer (4), a data conversion module (5), a power calculation module (6), a wireless signal transceiver module (7), a central control circuit board (8), a power module (9), an LED display screen (10) and a physical button (11), characterized in that: The secondary zero-sequence (three-phase) voltage acquisition device (3) comprises a voltage transformer and an open triangle voltage acquisition module.

2. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The external zero-sequence current transformer (1) is connected to a data acquisition device (2).

3. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The data acquisition device (2) acquires data of zero-sequence current and zero-sequence voltage.

4. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The secondary zero-sequence current transformer (4) collects the secondary zero-sequence current.

5. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The data conversion module (5) converts the data collected by the data collection device (2).

6. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The power calculation module (6) is connected to the central control circuit board (8) to perform power calculation on the collected data.

7. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The wireless signal transceiver module (7) transmits the data to the mobile phone software.

8. The intelligent fault detection device based on low current line selection according to claim 1 is characterized in that: The central control circuit board (8) is connected to a power module (9).

9. The intelligent fault detection device based on low current line selection according to claim 1, characterized in that: The LED display screen (10) is connected to the central control circuit board (8).

10. The intelligent fault detection device based on low current line selection according to claim 1, characterized in that: The physical button (11) is connected to the central control circuit board (8).

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