Traveling wave coil for overhead line

Abstract

The utility model relates to the field of power systems, in particular to a traveling wave coil for an overhead line, which comprises a shell, a central hole is arranged in the middle of the shell, a ferrite core is arranged in the shell, an enameled wire is uniformly wound on the outer wall of the ferrite core, and an initial wire and a tail wire of the enameled wire are led out through the surface of the ferrite core. The ferrite iron core is provided with an air gap, and the outer wall of the shell is provided with a wire passing groove for leading out an initial wire and a tail wire of the enameled wire. According to the utility model, the coil uses the ferrite iron core with the air gap as the base body, so that the interference of external factors can be resisted to the greatest extent, and accurate positioning under different high frequencies can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of power systems, and in particular to a traveling wave coil for overhead lines. Background Art

[0002] At present, methods such as fault indicator method and impedance method are used for fault location of distribution network overhead lines. The fault indicator uses a conventional coil and is easily interfered by electromagnetic and large load fluctuations, causing misoperation of the indicator. The impedance method is easily affected by transition resistance, line structure, distributed capacitance, etc., and often cannot meet the positioning accuracy requirements and has poor adaptability. Summary of the Utility Model

[0003] Other features and advantages of the present utility model will be described in the following specification, and will be partially obvious from the specification, or understood by implementing the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the structures specifically pointed out in the specification and other specification drawings.

[0004] The purpose of the present utility model is to overcome the above deficiencies and provide a traveling wave coil for overhead lines to solve the existing problems.

[0005] To achieve the above objective, the technical solution of the present utility model is: A traveling wave coil for overhead lines, including a housing, a central hole is provided in the middle of the housing, a ferrite core is provided inside the housing, an enameled wire is evenly wound around the outer wall of the ferrite core, the initial wire and the end wire of the enameled wire are led out through the surface of the ferrite core, an air gap is provided in the ferrite core, and a wire groove for leading out the initial wire and the end wire of the enameled wire is provided on the outer wall of the housing.

[0006] In some embodiments, the housing includes an upper housing and a lower housing.

[0007] In some embodiments, a plurality of matching grooves are provided on the opposite edges of the upper housing and the lower housing.

[0008] In some embodiments, an ultrasonic wire is provided on the opposite edges of the upper housing and the lower housing.

[0009] In some embodiments, the wire groove is in a long strip shape.

[0010] In some embodiments, the housing is in a ring shape.

[0011] By adopting the above technical solution, the beneficial effect of the present utility model is: The present utility model uses a ferrite core with an open air gap as the base for the coil, which can resist external factors interference to the greatest extent and meet accurate positioning at different high frequencies.

[0012] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present disclosure.

[0013] Undoubtedly, such purposes of the present utility model and other purposes will become more apparent after the details of the preferred embodiments described in the following with multiple drawings and illustrations.

[0014] To make the above and other purposes, features and advantages of the present utility model more obvious and understandable, one or several preferred embodiments are hereinafter specifically exemplified and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model.

[0016] In the drawings, the same components are denoted by the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only one or several embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on such drawings.

[0018] Figure 1 Structural schematic diagram of a traveling wave coil according to some embodiments of the present utility model;

[0019] Figure 2 Exploded view of the structure of a traveling wave coil according to some embodiments of the present utility model;

[0020] Figure 3 Structural schematic diagram of the outer shell of a traveling wave coil according to some embodiments of the present utility model. Detailed Description of the Embodiments

[0021] In order to make the purposes, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, but not to limit the present utility model.

[0022] In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0023] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through a transition structure between the two connected main bodies, and they are only connected through the connection structure to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0025] The following describes the specific implementation manners of the present utility model with reference to the drawings.

[0026] Refer to Figures 1-3 , Figure 1 which is a schematic structural diagram of a traveling wave coil according to some embodiments of the present utility model; Figure 2 which is an exploded view of the structure of a traveling wave coil according to some embodiments of the present utility model; Figure 3 which is a schematic structural diagram of the housing of a traveling wave coil according to some embodiments of the present utility model.

[0027] The utility model provides a traveling wave coil for overhead lines, which comprises a housing 1. A central hole 11 is arranged in the middle of the housing 1. A ferrite core 2 is arranged in the housing 1. An enameled wire 21 is evenly wound around the outer wall of the ferrite core 2. The initial wire and the end wire of the enameled wire 21 are led out through the surface of the ferrite core 2. An air gap 22 is arranged on the ferrite core 2. A wire groove 23 for leading out the initial wire and the end wire of the enameled wire 21 is arranged on the outer wall of the housing 1.

[0028] By using the ferrite core 2 with an air gap 22 as the base of the coil, the interference of external factors can be maximally resisted, and accurate positioning can be achieved under different high frequencies. Since the ferrite core 2 is made of a dense and homogeneous ceramic-structured non-metallic magnetic material, it has a low coercive force, a relatively high magnetic permeability, and has advantages such as high resistance and small eddy current loss in a wide frequency range. At the same time, the air gap 22 is arranged on the ferrite core 2, which can avoid the magnetic saturation phenomenon under large signals and current biases. When there is an asymmetric magnetic field, the generation of residual magnetism can be reduced, ensuring that the conduction power of the core is not affected.

[0029] According to some embodiments of the utility model, optionally, the housing 1 comprises an upper housing 12 and a lower housing 13. Two housings are provided to protect the coil and the ferrite core 2, preventing the product from being damaged during the installation process and affecting the positioning accuracy.

[0030] According to some embodiments of the utility model, optionally, a plurality of matching grooves 14 are arranged on the opposite edges of the upper housing 12 and the lower housing 13. To prevent the two housings from being misaligned.

[0031] According to some embodiments of the utility model, optionally, an ultrasonic wire 15 is arranged on the opposite edges of the upper housing 12 and the lower housing 13. Welded with ultrasonic waves to prevent the housing from falling off.

[0032] According to some embodiments of the utility model, optionally, the wire groove 23 is in a long strip shape. To facilitate the good lead connection on the upper and lower surfaces of the mutual inductor.

[0033] According to some embodiments of the utility model, optionally, the housing 1 is in a ring shape. In this way, the structure can be small in volume and can be better installed in narrow overhead line equipment.

[0034] It should be understood that the embodiments disclosed by the utility model are not limited to the specific processing steps or materials disclosed herein, but should extend to equivalent substitutions of such features understood by those of ordinary skill in the relevant fields. It should also be understood that the terms used herein are only for the purpose of describing specific embodiments and do not mean to limit.

[0035] As used in the specification, "embodiment" means that the specific features or characteristics described in connection with the embodiments are included in at least one embodiment of the present utility model. Therefore, the phrase "embodiment" that appears throughout the specification does not necessarily refer to the same embodiment.

[0036] In addition, the described features or characteristics may be combined in any other suitable manner in one or more embodiments. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the present utility model. However, those skilled in the relevant art will understand that the present utility model can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. A traveling wave coil for an overhead line, characterized in that: include: The outer shell has a center hole in the middle, a ferrite core is arranged in the outer shell, the outer wall of the ferrite core is evenly wound with enameled wire, the initial wire and the final wire of the enameled wire are led out through the surface of the ferrite core, the ferrite core is provided with an air gap, and the outer wall of the outer shell is provided with a wire groove for leading out the initial wire and the final wire of the enameled wire.

2. The traveling wave coil for overhead lines according to claim 1, characterized in that: The housing includes an upper housing and a lower housing.

3. The traveling wave coil for overhead lines according to claim 2, characterized in that: The upper shell and the lower shell are provided with a plurality of matching grooves on opposite edges.

4. The traveling wave coil for overhead lines according to claim 2 or 3, characterized in that: Ultrasonic lines are arranged on opposite edges of the upper shell and the lower shell.

5. The traveling wave coil for overhead lines according to claim 1, characterized in that: The wire trough is in the shape of an elongated strip.

6. The traveling wave coil for overhead lines according to claim 1, characterized in that: The housing is annular.

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