Portable ground fault positioning signal source

Abstract

The utility model discloses a portable ground fault positioning signal source which comprises a box body and an installation frame body located in the box body, the installation frame body is connected with a charger, a lithium battery, a boosting assembly and a high-voltage control assembly, and a master control interaction assembly is connected to a top cover in the box body. The charger, the lithium battery, the boosting assembly, the master control interaction assembly and the high-voltage control assembly are integrally arranged in the Z direction; the charger is electrically connected with the lithium battery, the lithium battery is electrically connected with the boosting assembly and the master control interaction assembly, and the boosting assembly is electrically connected with the high-voltage control assembly. The beneficial effects of the utility model are that the space utilization rate is high, the size of the whole machine is greatly reduced, and the outdoor carrying of equipment is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution network, in particular to a ground fault positioning signal source. Background Art

[0002] The distribution network covers a wide range, with long lines and a large number of user area equipment or line power equipment. Harsh environmental conditions such as high temperature, high humidity, and salt spray will accelerate the corrosion and aging of equipment, making the probability of grounding faults caused by distribution network power equipment relatively high. At the same time, due to the wide geographical coverage, external factors such as lightning strikes, animal touch, and plant growth may also cause grounding faults in distribution lines. Conventional grounding faults in distribution networks such as tree barriers and broken line grounding are more obvious and easier to find through manual line inspections. However, it is extremely difficult to locate hidden grounding faults such as internal breakdown of lightning arresters, slight damage to porcelain bottles, and internal breakdown of transformers through manual line inspections.

[0003] At present, the methods for finding ground faults in distribution networks include segmented test transmission, insulation shake meter, drone patrol, online positioning, etc. Except for drone patrol, other methods are segmented inspections, which involve unwinding wires, pulling transformers, etc. The search efficiency is low, time-consuming, and the fault point cannot be located quickly and effectively. The reliability of drone patrol at night is low, and the observed fault points are random, without clear characteristic prompts. Conventional ground fault location signal sources generally use a box-laying method to assemble each individual module, which wastes a lot of space within the space range, is large in size, and is not easy to carry.

[0004] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to ordinary technicians in this field. Utility Model Content

[0005] The technical problem to be solved by the utility model is: how to solve the problem that the grounding fault of the distribution network is assembled in a flat manner, resulting in a large volume and difficulty in carrying.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A portable ground fault locating signal source comprises a box body and a mounting frame located in the box body, a charger, a lithium battery, a boost component, and a high-voltage control component are connected to the mounting frame, a main control interactive component is connected to a top cover in the box body, and the charger, the lithium battery, the boost component, the main control interactive component, and the high-voltage control component are arranged as a whole along the Z direction; the charger is electrically connected to the lithium battery, the lithium battery is electrically connected to the boost component and the main control interactive component, and the boost component is electrically connected to the high-voltage control component.

[0008] The utility model realizes the layout of each electrical module in a three-dimensional structure in the z direction by installing a frame, fully considering the internal structural strength and anti-seismic and anti-fall performance under the premise of ensuring the compactness of the structure, so that the electrical components and modules inside the signal source are more closely connected, the space utilization rate is high, and the volume of the whole machine can be greatly reduced. The equipment is more convenient to carry outdoors. In addition, the modular assembly structure in the utility model makes the assembly of each area of ​​the equipment more independent, without involving mutual interference of assembly steps, making the equipment assembly production efficiency higher.

[0009] Preferably, the box body includes a charging port, a high-voltage output terminal, and a grounding terminal that need to be connected to the outside, the charging port is connected to the charger, and the high-voltage output terminal and the grounding terminal are connected to the high-voltage control component.

[0010] Preferably, the box body is an openable structure, and the box body includes a bottom box and a top cover. One side of the top cover can be rotatably connected to the bottom box, and the bottom box and the top cover are connected by a snap-fit ​​buckle. A handle is provided on the top cover. The side of the bottom box is connected to the charging port, the high-voltage output terminal, and the grounding terminal, and is covered on the outside of the charging port, the high-voltage output terminal, and the grounding terminal by a rotatable cover.

[0011] Preferably, the mounting frame includes an L-shaped structural member, a bridge structural member, a surface structural member, and a charger mounting plate. A plurality of the L-shaped structural members are distributedly connected inside the box to form a plurality of support points. The bridge structural member is supported by connecting any two of the L-shaped structural members. The surface structural member is connected and supported by the bridge structural member. A lithium battery and a high-voltage control component are connected to the surface structural member. The charger mounting plate is connected to the side of the lithium battery. The charger is connected to the charger mounting plate. The boost component is connected to the bridge structural member.

[0012] Preferably, there are four L-shaped structural members, which are distributed at four corners of the box body; there are two bridge structural members, which respectively connect two L-shaped structural members; and the surface structural members connect the bridge structural members in a horizontal manner.

[0013] Preferably, a weight-reducing hole is provided on the bridge structure.

[0014] While ensuring the overall strength of the box, it reduces weight and is easy to carry.

[0015] Preferably, the surface structural members are connected in a horizontal manner, and the surface structural members are in a stepped structure.

[0016] The installation position is adapted according to the height of the lithium battery and the high-voltage control component to maintain the compactness of the entire structure.

[0017] Preferably, the mounting frame further comprises a high-voltage shielding component, which is connected to the surface structure and partially isolates the high-voltage control component inside the shielding component.

[0018] The shielded structure isolates the high-voltage area and low-voltage area inside the equipment. In the event of discharge caused by insulation aging in the high-voltage area, the three-dimensionally wrapped metal sheet can be used for discharge protection to prevent high voltage from being conducted to the low-voltage area and causing electric shock to users, greatly enhancing the safety of equipment trial use.

[0019] Preferably, the side of the boost assembly is connected to a radiator.

[0020] Meet heat dissipation requirements and extend service life.

[0021] Preferably, the mounting frame further comprises a lithium battery mounting shell, the lithium battery mounting shell is connected to the surface structure, and the lithium battery is connected inside the lithium battery mounting shell.

[0022] The internal sheet metal parts are fastened with anti-loosening screws and spliced ​​in three dimensions to balance the internal weight of the equipment, making the internal structure of the signal source more stable, the device has good carrying balance, the equipment is more resistant to shock and aging, and the trial life of the equipment is increased.

[0023] The advantages of the utility model are:

[0024] (1) The utility model realizes the layout of each electrical module in a three-dimensional structure in the z direction by installing a frame, fully considering the internal structural strength and anti-vibration and anti-fall performance under the premise of ensuring the compactness of the structure, so that the electrical components and modules inside the signal source are more closely connected, the space utilization rate is high, and the volume of the whole machine can be greatly reduced; the equipment is more convenient to carry outdoors; and the modular assembly structure in the utility model makes the assembly of each area of ​​the equipment more independent, without involving mutual interference of assembly steps, so that the equipment assembly production efficiency is higher;

[0025] (2) Weight-reducing holes are opened on the bridge structure to ensure the strength of the overall box while reducing the weight for easy carrying;

[0026] (3) The surface structural members are connected in a horizontal manner, and the surface structural members are in a step-like structure; the installation position is adapted according to the height of the lithium battery and the high-voltage control assembly to maintain the compactness of the entire structure;

[0027] (4) The side of the boost component is connected to a radiator to meet the heat dissipation requirements and increase the service life;

[0028] (5) The internal sheet metal parts are fastened with anti-loosening screws and spliced ​​in three dimensions to balance the internal weight of the equipment, making the internal structure of the signal source more stable, the device better in carrying balance, the equipment more resistant to shock and aging, and increasing the trial life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a portable ground fault locating signal source according to an embodiment of the utility model;

[0030] Figure 2 It is a structural diagram of a portable ground fault location signal source according to an embodiment of the utility model;

[0031] Figure 3 It is a structural schematic diagram of a portable ground fault locating signal source (part of the box is hidden) according to an embodiment of the utility model;

[0032] Figure 4 This is a schematic diagram of the internal structure of the portable ground fault locating signal source according to an embodiment of the utility model;

[0033] Figure 5 This is a schematic diagram of the internal structure of the portable ground fault locating signal source according to an embodiment of the utility model;

[0034] Figure 6 It is an exploded schematic diagram of the internal structure of the portable ground fault locating signal source according to an embodiment of the utility model;

[0035] Figure 7 This is a working schematic diagram of a portable ground fault locating signal source according to an embodiment of the utility model;

[0036] Figure 8 It is the fault phase current and non-fault current situation in the fault section of the embodiment of the utility model;

[0037] Fig. 9 It is the current situation of the fault phase and the non-fault phase in the non-fault section of the embodiment of the utility model;

[0038] Reference numerals:

[0039] 1. Box body; 11. Charging port; 12. High voltage output terminal; 13. Ground terminal;

[0040] 2. Mounting frame; 21. L-shaped structural member; 22. Bridge structural member; 23. Surface structural member; 24. Charger mounting plate; 25. High-voltage shielding member;

[0041] 3. Charger; 4. Lithium battery; 5. Boost component; 6. Main control interaction component; 7. High-voltage control component; 8. Radiator. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Embodiment 1:

[0044] The portable ground fault location signal source includes a box 1 and a mounting frame 2 located in the box 1. The mounting frame 2 is connected to a charger 3, a lithium battery 4, a boost component 5, and a high-voltage control component 7. The main control interactive component 6 is connected to the top cover in the box 1. The charger 3, the lithium battery 4, the boost component 5, the main control interactive component 6, and the high-voltage control component 7 are arranged along the Z direction as a whole to achieve a compact technical effect. The charger 3 converts the city electricity into a 28V DC voltage through the charging port 11 to charge the lithium battery 4. The lithium battery 4 is electrically connected to the boost component 5 to provide a stable boost power supply to the boost component 5, and is also electrically connected to the main control interactive component 6 to provide power to the main control interactive component 6. The boost component 5 increases the low voltage to a high voltage and transmits the high voltage signal to the high voltage control component 7. The high voltage control component 7 transforms and samples the high voltage DC signal. The output end of the high voltage control component 7 is connected to the high voltage output terminal 12 and the ground terminal 13.

[0045] Specifically, Figure 1 , Figure 2 As shown, the box 1 is an openable structure, including a bottom box and a top cover, one side of the top cover can be rotatably connected to the bottom box, and the bottom box and the top cover are easy to open by snap-fit ​​buckle, and a handle is provided on the top cover to achieve the purpose of carrying. Since the charging port 11, the high-voltage output terminal 12, and the grounding terminal 13 need to be connected to the outside, an interface position can be set on the side of the box 1, which can be an open and close cover or directly set on the wall of the box 1, and the charging port 11, the high-voltage output terminal 12, and the outside of the grounding terminal 13 are covered by a rotatable cover to reduce dust and water from entering the interface. The charging port 11 is connected to the charger 3, and the high-voltage output terminal 12 and the grounding terminal 13 are connected to the high-voltage control assembly 7. Here, the box 1 can be designed according to the actual size and the specific position of the terminal, without further description and limitation.

[0046] It should be noted that the charging port 11, high-voltage output terminal 12, grounding terminal 13 and other structures are as close to the height of each component in the box 1 as possible. Through the reasonable layout of the internal structure, the output terminals, charging terminals and indicator light devices of the device are on the same horizontal plane and the closest distance to the components and modules with internal electrical connections, making the internal wiring of the signal source device clearer, while saving wiring harnesses and reducing costs.

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the mounting frame 2 includes an L-shaped structural member 21, a bridge structural member 22, a surface structural member 23, a charger mounting plate 24, and a high-voltage shielding member 25; the entire mounting frame 2 is connected to the ground terminal 13. The mounting frame 2 is realized by a three-dimensional combination of the mounting frame 2 and each component. The mounting frame 2 is a metal structural member connected by screws and connected to the ground terminal, so that the high-voltage control component 7 and other device plates are wrapped in the metal structural member, which improves the safety of the signal source device. In this embodiment, the mounting frame 2 is a sheet metal part.

[0048] The bottom of the four L-shaped structural members 21 is connected to the bottom of the box body 1 by bolts, and the four L-shaped structural members 21 form four supporting points in a symmetrical manner. There are two bridge structural members 22, and the bridge structural members 22 are rectangular plate structures with weight reduction holes. Two L-shaped structural members 21 are connected to the bridge structural members 22, and the other two L-shaped structural members are also connected to one of the bridge structural members 22. The surface structural member 23 is connected to the two bridge structural members 22 in a horizontal manner. The surface structural member 23 can be set in a step shape according to the height requirements, and the installation position is adapted according to the height of the lithium battery 4 and the high-voltage control component 7 to maintain the compactness of the entire structure. The lithium battery 4 and the high-voltage control component 7 are connected to the surface structural member 23, the charger mounting plate 24 is connected to the side of the lithium battery 4, and the charger 3 is installed on the charger mounting plate 24. The boost component 5 is connected to one of the bridge structural members 22 by bolts. The side of the boost component 5 is connected to the radiator 8. The radiator 8 dissipates heat for the boost component 5.

[0049] The lithium battery 4 is also connected to the surface structure 23 through the lithium battery mounting shell, and the lithium battery 4 is installed in the lithium battery mounting shell. The periphery of the high-voltage control component 7 is connected to the high-voltage shielding component 25 to isolate the high-voltage module from the low-voltage area, and realize the ground wire shielding network between the high-voltage area and the low-voltage area, avoiding the risk of high-voltage module insulation abnormality discharging to the low-voltage area.

[0050] In this embodiment, the various electrical modules are arranged in a three-dimensional structure by installing the frame 2, and the internal structural strength and the anti-seismic and anti-fall performance are fully considered under the premise of ensuring the compactness of the structure.

[0051] This embodiment adopts a three-dimensional assembly structure, so that the electrical components and modules inside the signal source are more closely connected, the space utilization rate is high, and the volume of the whole device is greatly reduced. The device is more convenient to carry outdoors.

[0052] The modular assembly structure of this embodiment allows the assembly of each area of ​​the equipment to be more independent, without involving mutual interference of assembly steps, thereby making the equipment assembly production efficiency higher.

[0053] The three-dimensional shielding structure inside the present embodiment shields and isolates the high-voltage area and the low-voltage area inside the equipment. When insulation aging occurs in the high-voltage area and discharge occurs, the three-dimensionally wrapped metal sheet can be used for discharge protection to prevent high voltage from being conducted to the low-voltage area and causing electric shock to users, thereby greatly enhancing the safety of equipment trial use.

[0054] The internal sheet metal parts of this embodiment are fastened with anti-loosening screws and are spliced ​​in three dimensions to balance the internal weight of the device, so that the internal structure of the signal source is more stable, the device has good carrying balance, the device is more shock-resistant and aging-resistant, and the trial life of the device is increased.

[0055] This embodiment demonstrates a portable ground fault location signal source. After the power distribution automation system determines that there is grounding at the rear end of a certain intelligent switch on a certain line of the distribution network and isolates the fault section, the portable signal source can be easily carried to the fault section for characteristic signal injection, and the fault location is determined based on the injected characteristic signal through the current detection device and the receiving device. Due to the wide distribution of distribution network lines and complex terrain, in order to reduce the burden on front-line operation and maintenance personnel and reduce the inspection workload, this type of ground fault location device is designed on the premise of fully considering factors such as internal heat dissipation and insulation of the device, and fully considering the compactness and portability of the structure. This makes the internal structure layout of the signal source device more reasonable and compact, reduces the volume of the signal source device, and improves the production efficiency of the signal source.

[0056] Specifically, Figure 6 As shown, after a ground fault occurs in the line, the fault section is isolated, and a portable signal source is used to inject signals into the fault section. Specifically, the device injects a current signal of a certain frequency into the power outage section of the distribution line, and the current signal flows back to the ground through the fault point to form a loop. The high-voltage output line uses a one-to-three form, so that the three phases have the same phase and amplitude voltage signals to the ground. On the fault phase, the injected signal flows through the fault phase through the ground fault point A and flows back to the signal injection device. The three-phase current data on the line is measured by the open current sensor B. The measured current data is transmitted to the handheld data display terminal C by wireless communication. The displayed data is used to determine the fault location and direction according to the three-phase balance law.

[0057] The area between the signal injection point and the fault point is called the fault section, and the area outside the fault section is the non-fault section, such as Figure 7 As shown in Figure 2, within the fault section, the fault phase current has a larger deviation than the non-fault phase current, and △t1 and △t2 are equal to 70ms. Figure 8 As shown, in the non-fault section, the fault phase current is the same as the non-fault phase current. By judging whether the three-phase currents are the same, it can be judged whether the measurement point is in the fault section.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Portable ground fault location signal source, characterized in that, It includes a box body and a mounting frame located in the box body, the mounting frame is connected to a charger, a lithium battery, a boost component, and a high-voltage control component, the main control interaction component is connected to the top cover in the box body, the charger, the lithium battery, the boost component, the main control interaction component, and the high-voltage control component are arranged along the Z direction as a whole; the charger is electrically connected to the lithium battery, the lithium battery is electrically connected to the boost component and the main control interaction component, and the boost component is electrically connected to the high-voltage control component.

2. The portable ground fault location signal source according to claim 1, characterized in that: The box body includes a charging port, a high-voltage output terminal, and a grounding terminal that need to be connected to the outside. The charging port is connected to the charger, and the high-voltage output terminal and the grounding terminal are connected to the high-voltage control component.

3. The portable ground fault location signal source according to claim 2, characterized in that: The box body is an openable structure, and the box body includes a bottom box and a top cover. One side of the top cover can be rotatably connected to the bottom box, and the bottom box and the top cover are connected by a snap-fit ​​buckle. A handle is provided on the top cover. The side of the bottom box is connected to the charging port, the high-voltage output terminal, and the grounding terminal, and is covered on the outside of the charging port, the high-voltage output terminal, and the grounding terminal by a rotatable cover.

4. The portable ground fault location signal source according to claim 1, characterized in that: The mounting frame includes an L-shaped structural member, a bridge structural member, a surface structural member, and a charger mounting plate. Multiple L-shaped structural members are distributedly connected inside the box to form multiple supporting points. The bridge structural member is supported by connecting any two of the L-shaped structural members, and the surface structural member is connected and supported by the bridge structural member. The surface structural member is connected to a lithium battery and a high-voltage control component. The charger mounting plate is connected to the side of the lithium battery, the charger is connected to the charger mounting plate, and the boost component is connected to the bridge structural member.

5. The portable ground fault location signal source according to claim 4, characterized in that: There are four L-shaped structural members, which are distributed at four corners of the box body; there are two bridge structural members, which respectively connect two L-shaped structural members; and the surface structural members connect the bridge structural members in a horizontal manner.

6. The portable ground fault location signal source according to claim 4, characterized in that: The bridge structure is provided with a weight-reducing hole.

7. The portable ground fault location signal source according to claim 4, characterized in that: The surface structural members are connected in a horizontal manner, and the surface structural members are in a step-shaped structure.

8. The portable ground fault location signal source according to claim 4, characterized in that: The mounting frame also includes a high-voltage shielding component, which is connected to the surface structure and partially isolates the high-voltage control component inside.

9. The portable ground fault location signal source according to claim 4, characterized in that: The side surface of the boost component is connected to the radiator.

10. The portable ground fault location signal source according to claim 4, characterized in that: The mounting frame also includes a lithium battery mounting shell, the lithium battery mounting shell is connected to the surface structure, and the lithium battery is connected inside the lithium battery mounting shell.

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