Distribution line detection device

Abstract

The utility model discloses a distribution line detection device, which comprises an installation body, and a voltage regulator, an industrial frequency transformer, an industrial frequency voltage doubling rectifier module, a high voltage output module, a measurement module and a display module which are arranged in the installation body, the power frequency transformer is connected to the voltage regulator, the power frequency voltage doubling rectifier module is connected to the power frequency transformer, the high-voltage output module is connected to the power frequency voltage doubling rectifier module, the measurement module is connected to the high-voltage output module, and the display module is connected to the measurement module.

Description

Technical Field

[0001] This utility model belongs to the field of power detection technology, and specifically relates to a power distribution line detection device. Background Technology

[0002] A 10kV distribution line refers to a line with a voltage level of 10kV (10 kilovolts) used for distributing electrical energy. It is a crucial link in the power system connecting substations and users, transmitting electrical energy from the substation's 10kV busbar to various user terminals. In existing technology, grounding faults in 10kV distribution lines, especially overhead lines, are detected using instruments such as grounding fault detectors or DC power supply testers. This solves the problem of misjudgments that insulation resistance meters are prone to when used in humid environments, and avoids voltage surges to user equipment and the power grid that can occur when the power supply system is tested for energization.

[0003] However, the output voltage of the ground fault finder is approximately 3kV, which often fails to detect some flashover-type high-resistance ground faults, such as those with a grounding gap of 2 mm. The DC tester, with an output voltage of 8kV, can detect this type of flashover-type high-resistance ground fault. However, during use, it was found that repaired faults would recur during prolonged rain, only to disappear again after the rain stopped. Research, analysis, and practical verification revealed that the issue stemmed from insufficient DC voltage output from the DC tester, leading to repeated tripping of high-resistance ground faults during testing. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a power distribution line detection device to solve the problem of low detection current in the grounding fault detection of 10kV power distribution lines in the prior art.

[0005] A power distribution line testing device includes a mounting body and a voltage regulator, a power frequency transformer, a power frequency voltage multiplier rectifier module, a high voltage output module, a measurement module, and a display module disposed inside the mounting body. The voltage regulator is connected to the power frequency voltage, the power frequency transformer is connected to the voltage regulator, the power frequency voltage multiplier rectifier module is connected to the power frequency transformer, the high voltage output module is connected to the power frequency voltage multiplier rectifier module, the measurement module is connected to the high voltage output module, and the display module is connected to the measurement module.

[0006] Preferably, the mounting body includes an upper mounting body and a lower mounting body, the upper mounting body is provided with an opening, and the lower mounting body is connected to the opening; the upper mounting body is provided with a wiring hole, and the interior of the upper mounting body is provided with a first mounting groove and a second mounting groove from top to bottom.

[0007] Preferably, the first mounting slot is connected with a mounting plate, and the high-voltage output module is connected to the mounting plate.

[0008] Preferably, the measuring module comprises a fixing plate and a measuring module body connected to the fixing plate, the display module is connected to the fixing plate and the measuring module body, and the measuring module body is embedded with a computing chip.

[0009] Preferably, the mounting body is provided with mounting openings at two ends, and side plates are connected to the mounting openings.

[0010] The display module comprises a display panel, and the display panel is mounted to one of the side plates.

[0011] Preferably, the fixing plate is connected to the second mounting slot.

[0012] Preferably, the voltage regulator and the power frequency transformer are connected to the lower mounting body.

[0013] Preferably, the upper mounting body is provided with ventilation openings on the side surface.

[0014] Preferably, the mounting plate is provided with a through hole, and the high-voltage output module is connected to the through hole.

[0015] Preferably, the power frequency voltage doubling rectifier module is a power frequency voltage doubling rectifier module capable of outputting a direct current voltage of kV and a current of mA.

[0016] Compared with the prior art, the utility model has the advantages that the voltage regulator 1 can adjust the input conventional power frequency 220V voltage from 0V to 220V, the power frequency transformer 2 boosts the voltage output from the voltage regulator 1, and the power frequency voltage doubling rectifier module 3 carries out power frequency voltage doubling rectification to the voltage output from the power frequency transformer 2, so that 9.5kV direct current high voltage is obtained and applied to the line to be tested through the high-voltage output module 4, the current reaches 70mA when the voltage is 9.5kV, the high-resistance grounding fault line can be applied with voltage for a long time under the condition, so that the high-resistance grounding fault can be sintered into a low-resistance fault, and then the fault point can be positioned more conveniently, and the problem that the high-resistance grounding fault repeatedly trips in the detection process due to the direct current voltage can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0018] Figure 1It is the structural schematic diagram of the detection device provided by the utility model;

[0019] Figure 2 It is the structural schematic diagram of the detection device provided by the utility model;

[0020] Figure 3 It is the internal structure schematic diagram of the detection device provided by the utility model. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0023] In the description of the utility model, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than and the like are not included in the number, above, below, within and the like are included in the number. If the terms "first", "second", "third" are described, they are only for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0024] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation. The embodiments will be described below according to the overall structure of the utility model.

[0025] Figure 1 and Figure 3 is the structural schematic diagram of the detection device provided by the utility model, Figure 3 is the internal structure schematic diagram of the detection device provided by the utility model, refer to Figure 1 , Figure 2 and Figure 3 A distribution line detection device, the detection device includes installation body 7 and the voltage regulator 1, power frequency transformer 2, power frequency voltage doubling rectification module 3, high voltage output module 4, measurement module 5 and display module 6 arranged in the installation body 7, the voltage regulator 1 is connected to power frequency voltage, the power frequency transformer 2 is connected to the voltage regulator 1, the power frequency voltage doubling rectification module 3 is connected to the power frequency transformer 2, the high voltage output module 4 is connected to the power frequency voltage doubling rectification module 3, the measurement module 5 is connected to the high voltage output module 4, and the display module 6 is connected to the measurement module 5.

[0026] In the above detection device, the voltage regulator 1 can adjust the input conventional power frequency 220V voltage from 0V to 220V, the power frequency transformer 2 boosts the voltage output from the voltage regulator 1, and the power frequency voltage doubling rectification module 3 further boosts and rectifies the voltage output from the power frequency transformer 2, so that 0V to 9.5kV DC high voltage is obtained and applied to the line to be tested through the high voltage output module 4.

[0027] In order to solve the problem of high-resistance grounding fault line tripping repeatedly due to heavy rain, it is appropriate to increase the test voltage to 9.5kV without affecting other measurement auxiliary equipment connected on the line, and in order to adapt to the wet environment on site, under the condition that the length of the line to be tested is longer, through calculation and actual verification, when the voltage is 9.5kV and the current is 70mA, it is the optimal scheme. Under this condition, the high-resistance grounding fault line problem can be applied for a long time, which can sinter the line high-resistance grounding fault into a low-resistance fault, so that the fault point can be located more conveniently.

[0028] Refer to Figure 2 and Figure 3 In the preferred embodiment, the installation body 7 includes an upper installation body 71 and a lower installation body 72, the upper installation body 71 is provided with an opening 710, and the lower installation body 72 is connected to the opening 710; the upper installation body 71 is provided with a wiring hole 711, and the inside of the upper installation body 71 is sequentially provided with a first installation groove 712 and a second installation groove 713 from top to bottom. Refer to Figure 1 and Figure 2 In the preferred embodiment, the first installation groove 712 is connected with a mounting plate 8, and the high voltage output module 4 is connected to the mounting plate 8.

[0029] The high-voltage output module 4 is installed on the mounting plate 8, and then the wires on the high-voltage output module 4 can pass through the upper mounting body 71 to apply a test voltage to the 10kV power distribution line.

[0030] Referring to Figure 2 and Figure 3 In a preferred embodiment, the measuring module 5 comprises a fixing plate 51 and a measuring module body 52 connected to the fixing plate 51, and the display module 6 is connected to the fixing plate 51 and the measuring module body 52. The measuring module body 52 is embedded with a computing chip. The test data obtained by the measuring module 5 can be analyzed and judged by the computing chip, and the detection result can be automatically obtained according to the built-in data model. The display module 6 can display the detection result.

[0031] Specifically, the fixing plate 51 is further provided with a wire port 510, which facilitates the passage of connecting wires between internal modules of the device.

[0032] Referring to Figure 2 and Figure 3 In a preferred embodiment, the mounting body 7 is provided with mounting ports 70 at both ends, and the mounting ports 70 are connected with side plates 73; the display module 6 comprises a display panel 61, which is mounted to one of the side plates 73.

[0033] Referring to Figure 2 and Figure 3 In a preferred embodiment, the fixing plate 51 is connected to the second mounting groove 713.

[0034] Referring to Figure 2 and Figure 3 In a preferred embodiment, the voltage regulator 1 and the power frequency transformer 2 are connected to the lower mounting body 72.

[0035] In some other embodiments, the upper mounting body 71 and the lower mounting body 72 are integrally arranged, the end face is provided with the mounting ports 70, the voltage regulator 1 and the power frequency transformer 2 are arranged at the bottom of the mounting body 7, the high-voltage output module 4 is arranged at the inner top of the mounting body 7, the measuring module 5 is arranged at the middle layer position inside the mounting body 7, and the display module 6 is arranged at the inner side of the mounting body 7. The side plates 73 on the mounting ports 70 are arranged in a detachable form, so as to facilitate the installation of the voltage regulator 1, the power frequency transformer 2, the power frequency voltage doubling rectifier module 3, the high-voltage output module 4, the measuring module 5 and the display module 6 inside the mounting body 7.

[0036] Referring to Figure 2 and Figure 3 In a preferred embodiment, the side surface of the upper mounting body 71 is provided with a ventilation port 714. The ventilation port 714 can realize ventilation and cooling inside the mounting body 7.

[0037] Referring to Figure 2 and Figure 3 In the preferred embodiment, the mounting plate 8 is provided with a through hole 80, and the high-voltage output module 4 is connected to the through hole 80. Among them, the high-voltage output module 4 is arranged on the through hole 80, so that part of the high-voltage output module 4 can be exposed from the top of the mounting plate 8, and part of the high-voltage output module 4 can be exposed from the bottom of the mounting plate 8, so that the high-voltage output module 4 is convenient to connect with the measuring module, and also makes the high-voltage output module 4 convenient to correspond to the wiring hole 711, and the wiring of the high-voltage output module 4 is applied to the 10kV distribution line through the wiring hole 711. Test voltage.

[0038] Referring to Figure 2 and Figure 3 In the preferred embodiment, the power frequency voltage doubling rectifier module 3 is a power frequency voltage doubling rectifier module capable of outputting a direct current voltage of 9.5kV and a current of 70mA.

[0039] In summary, the power distribution line detection device provided by the utility model, the voltage regulator 1 can adjust the input conventional power frequency 220V voltage from 0V to 220V, the power frequency transformer 2 boosts the voltage output from the voltage regulator 1, and the power frequency voltage doubling rectifier module 3 carries out power frequency voltage doubling rectification on the voltage output from the power frequency transformer 2, so that the 9.5kV direct current high voltage is applied to the line to be tested through the high-voltage output module 4, and the current reaches 70mA when the voltage is 9.5kV. Under this condition, the high-impedance grounding fault line can be applied with voltage for a long time, so that the line high-impedance grounding fault can be sintered into a low-impedance fault, and then the fault point can be positioned more conveniently, and the problem of high-impedance grounding fault caused by repeated tripping in the detection process due to direct current voltage can be avoided. In the 10kV distribution line, especially the grounding fault of overhead line, the detection voltage can be increased from 8kV to 9.5kV, and then through the matched fault signal detector and fault signal receiver, the fault point can be quickly found. Not only can the low-impedance grounding fault in the distribution line fault classification be solved, but also the high-impedance grounding fault in the distribution line fault classification can be solved.

[0040] The foregoing description of the specific exemplary embodiments of the present application is for the purpose of illustrating and describing, rather than limiting the application, and it will be apparent to those of ordinary skill in the art that many changes and modifications can be made to the embodiments with the foregoing teaching, notwithstanding what can be suggested above and although only a few of the exemplary embodiments of the present application have been described. Although the embodiments of the present application have been described, the specific embodiments are merely illustrative of the present application and are not intended to limit the present application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and the exemplary embodiments are selected and described for the purpose of explaining the specific principles of the present application and its practical application, so that those skilled in the art can make modifications, replacements, variations and various different selections and changes to the embodiments without creative contribution after reading the specification, as long as they are within the scope of the claims of the present application.

Claims

1. A power distribution line detection device, characterized by, The detection device comprises a mounting body (7), a voltage regulator (1), a power frequency transformer (2), a power frequency voltage doubling rectifier module (3), a high-voltage output module (4), a measurement module (5) and a display module (6) arranged inside the mounting body (7), the voltage regulator (1) is connected to a power frequency voltage, the power frequency transformer (2) is connected to the voltage regulator (1), the power frequency voltage doubling rectifier module (3) is connected to the power frequency transformer (2), the high-voltage output module (4) is connected to the power frequency voltage doubling rectifier module (3), the measurement module (5) is connected to the high-voltage output module (4), and the display module (6) is connected to the measurement module (5).

2. The power distribution line detection device of claim 1, wherein The mounting body (7) comprises an upper mounting body (71) and a lower mounting body (72), the upper mounting body (71) is provided with an opening (710), and the lower mounting body (72) is connected to the opening (710); a wiring hole (711) is formed in the upper mounting body (71), and a first mounting groove (712) and a second mounting groove (713) are sequentially arranged in the upper mounting body (71) from top to bottom.

3. A power distribution line detection device according to claim 2, wherein The first mounting groove (712) is connected with a mounting plate (8), and the high-voltage output module (4) is connected to the mounting plate (8).

4. The power distribution line detection device of claim 2, wherein, The measurement module (5) comprises a fixed plate (51) and a measurement module body (52) connected to the fixed plate (51), the display module (6) is connected to the measurement module body (52), and the measurement module body (52) is embedded with a computing chip.

5. A power distribution line detection device according to claim 4, wherein Both ends of the mounting body (7) are provided with mounting openings (70), and the mounting openings (70) are connected with side plates (73). The display module (6) comprises a display panel (61), and the display panel (61) is mounted to one of the side plates (73).

6. A power distribution line detection device according to claim 4, wherein The fixed plate (51) is connected to the second mounting groove (713).

7. The power distribution line detection device of claim 2, wherein The voltage regulator (1) and the power frequency transformer (2) are connected to the lower mounting body (72).

8. The power distribution line detection device of claim 2, wherein, A ventilation opening (714) is arranged on the side surface of the upper mounting body (71).

9. The power distribution line detection device of claim 3, wherein, A through hole (80) is arranged on the mounting plate (8), and the high-voltage output module (4) is connected to the through hole (80).

10. The power distribution line detection apparatus of claim 1, wherein The power frequency voltage doubling rectifier module (3) can output a direct current voltage of 9.5kV and a current of 70mA.

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