Traveling wave ranging current transformer

Abstract

The utility model relates to the field of electric power monitoring, in particular to a traveling wave distance measurement current transformer which comprises a clamp shell, a ferrite magnetic core is installed on the inner wall of the clamp shell, a fixing base is arranged on the inner wall of the ferrite magnetic core, the ferrite magnetic core is cut into two semicircular ferrite magnetic cores, and the two semicircular ferrite magnetic cores are arranged on the fixing base. An enameled wire is wound on one side of the ferrite magnetic core, and the initial end and the tail end of the enameled wire are led out through connecting wires respectively. Due to the fact that the ferrite magnetic core is composed of the two semicircular ferrite magnetic cores, installation and detachment are convenient, saturation of the iron core can be prevented, meanwhile, signals of current transformation can be stable and not prone to being interfered due to the high-frequency interference resisting characteristic of the ferrite magnetic core, the fixing base in the middle can play a role in positioning a cable, and the structure is simple. And signal balance caused by cable electric field offset is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power monitoring, in particular to a traveling wave ranging current transformer. Background Art

[0002] Power systems mostly use the impedance method to measure transmission line fault distances. This method's distance measurement accuracy is affected by factors such as fault resistance, asymmetric line structure, and uneven distribution of zero-sequence parameters along the line. This method is less than ideal in practice, and also suffers from drawbacks such as unstable high-frequency signal transmission, which leads to large distance measurement errors and inconvenient maintenance. Utility Model Content

[0003] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the description and other drawings.

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a traveling wave ranging current transformer to solve the existing problems.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a traveling wave ranging current transformer, including a clamp housing, a ferrite core is installed on the inner wall of the clamp housing, a fixing seat is provided on the inner wall of the ferrite core, the ferrite core is formed into two semicircular ferrite cores by cutting, one side of the ferrite core is wrapped with enameled wire, and the beginning and end of the enameled wire are respectively led out using connecting wires.

[0006] In some embodiments, the clamp housing includes a first half frame and a second half frame, both ends of the first half frame and the second half frame are provided with slots, and the first half frame and the second half frame are threadedly connected through the slots.

[0007] In some embodiments, an insulating layer is provided on the surface of the ferrite core.

[0008] In some embodiments, the cut end surface of the ferrite core is coated with a rust inhibitor.

[0009] In some embodiments, a mounting seat is provided on an outer wall of the clamp housing.

[0010] In some embodiments, the gap between the clamp housing and the outer wall of the ferrite core is evenly coated with silicone rubber.

[0011] In some embodiments, a mounting groove is provided on a side of the fixing base adjacent to the ferrite core.

[0012] In some embodiments, a plurality of clamping frames are provided on the inner wall of the fixing base.

[0013] In some embodiments, the clamping frames are evenly distributed on the inner wall of the fixing base, and the clamping frames are arc-shaped.

[0014] In some embodiments, the clamp housing is in a frame shape or a ring shape.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are as follows: the utility model uses a ferrite core composed of two semicircular ferrite cores, which is very convenient to install and disassemble, and can also prevent the core from saturating. At the same time, the anti-high-frequency interference characteristics of the ferrite core can make the current transmission signal stable and not easily interfered with. The middle fixing seat can play the role of positioning the cable to prevent the cable electric field from offsetting the signal balance.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0017] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments with reference to various drawings and figures.

[0018] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, one or more preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0020] In the drawings, like components are given like reference numerals, and the drawings are schematic and not necessarily drawn to scale.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only one or several embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the structure of the mutual inductor of some embodiments of the present utility model;

[0023] Figure 2 This is an exploded diagram of the structure of the mutual inductor according to some embodiments of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but are not intended to limit the present invention.

[0025] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In this utility model, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connections, removable connections, or integration; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or interaction between two components. However, the term "direct connection" indicates that the two connected entities are not connected through a transitional structure, but are connected solely through a connecting structure to form a single entity. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may 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 with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0028] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0029] Reference Figure 1 and 2 , Figure 1 Schematic diagram of the structure of the mutual inductor of some embodiments of the present utility model; Figure 2This is an exploded diagram of the structure of the mutual inductor according to some embodiments of the present invention.

[0030] The utility model provides a traveling wave ranging current transformer, comprising a clamp housing 1, a ferrite core 2 being mounted on the inner wall of the clamp housing 1, a fixing seat 3 being provided on the inner wall of the ferrite core 2, the ferrite core 2 being formed into two semicircular ferrite cores 2 by cutting, an enameled wire being wound around one side of the ferrite core 2, and the beginning and end of the enameled wire being led out respectively using connecting wires 21.

[0031] The ferrite core 2, which is composed of two semicircular ferrite cores 2, is easy to install and remove, and can also prevent the core from saturating. At the same time, the ferrite core 2's anti-high-frequency interference properties can stabilize the current-transmitting signal and make it less susceptible to interference. The central fixing seat 2 can also serve to position the cable, preventing the cable's electric field from offsetting and causing signal imbalance. In addition, enameled wire is wound around one side of the ferrite core 2, and the beginning and end of the enameled wire are respectively led out using connecting wires 21 to enable the application of electromagnetic induction. After the cable passes through the center of the core, the enameled wire is wound around the core. When the current in the cable changes, a signal is sensed at both ends of the enameled wire and then transmitted through the connecting wire 21.

[0032] According to some embodiments of the present invention, the clamp housing 1 optionally includes a first half frame 11 and a second half frame 12. Both ends of the first half frame 11 and the second half frame 12 are provided with slots 13, and the first half frame 11 and the second half frame 12 are threadedly connected through the slots 13. The two half frames are connected together with screws through the slots 13, which facilitates installation and subsequent disassembly.

[0033] According to some embodiments of the present invention, an insulating layer is optionally provided on the surface of the ferrite core 2 to provide insulation isolation for the ferrite core 2 and prevent current interference.

[0034] According to some embodiments of the present invention, the cut end surface of the ferrite core 2 is optionally coated with a rust preventer to prevent oxidation of the end surface and affect subsequent use.

[0035] According to some embodiments of the present invention, optionally, a mounting seat 14 is provided on the outer wall of the clamp housing 1 , so as to facilitate installation of a mutual inductor through the mounting seat 14 .

[0036] According to some embodiments of the present invention, optionally, the gap between the clamp housing 1 and the outer wall of the ferrite core 2 is evenly coated with silicone rubber. After installation, coating the gap with silicone rubber can prevent the core from falling off and also has a good insulation effect.

[0037] According to some embodiments of the present invention, optionally, a mounting groove 31 is provided on one side of the fixing base 3 adjacent to the ferrite core 2. The mounting groove 31 is provided to facilitate clamping the fixing base 3 on the ferrite core 2 and to provide good position fixing.

[0038] According to some embodiments of the present invention, the inner wall of the fixing base 3 is optionally provided with a plurality of clamping frames 32. The clamping frames 32 are used to fix the cable after passing through to prevent the core from shifting during installation, which may cause deviation in the collected signal.

[0039] According to some embodiments of the present invention, the clamping brackets 32 are optionally evenly distributed on the inner wall of the fixing base 3 and are arc-shaped. The arc-shaped clamping brackets 32 are preferably arranged to better fit the cylindrical cable and effectively secure it. Other fixing structures may also be used, but an arc-shaped one is preferred to facilitate cable insertion and installation.

[0040] According to some embodiments of the present invention, the clamp housing 1 is optionally in a square or ring shape. The shape of the clamp housing 1 can be changed according to the situation, and is preferably in a ring shape because the magnetic flux of the ring magnetic field after the formation is relatively large and it is also easier to produce.

[0041] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should extend to equivalent substitutions of such features understood by those skilled in the relevant art. It should also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be limiting.

[0042] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrase or "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0043] Furthermore, the described features or characteristics may be combined in any other suitable manner into 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 invention. However, those skilled in the relevant art will appreciate that the present invention may be implemented without one or more of the above specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A traveling wave ranging current transformer, characterized in that: include: The clamp housing has a ferrite core mounted on its inner wall. A fixing seat is provided on the inner wall of the ferrite core. The ferrite core is cut into two semicircular ferrite cores. One side of the ferrite core is wound with enameled wire, and the beginning and end of the enameled wire are respectively led out with connecting wires. The inner wall of the fixing seat is provided with a plurality of clamping frames.

2. The traveling wave ranging current transformer according to claim 1, characterized in that: The clamp housing comprises a first half frame and a second half frame. Both ends of the first half frame and the second half frame are provided with slots, and the first half frame and the second half frame are threadedly connected through the slots.

3. The traveling wave ranging current transformer according to claim 1, characterized in that: An insulating layer is provided on the surface of the ferrite core.

4. The traveling wave ranging current transformer according to claim 1 or 3, characterized in that: The cut end faces of the ferrite core are coated with a rust preventive agent.

5. The traveling wave ranging current transformer according to claim 1, characterized in that: The outer wall of the clamp housing is provided with a mounting seat.

6. The traveling wave ranging current transformer according to claim 1, characterized in that: The gap between the clamp shell and the outer wall of the ferrite core is evenly coated with silicone rubber.

7. The traveling wave ranging current transformer according to claim 1, characterized in that: A mounting groove is provided on one side of the fixing seat adjacent to the ferrite core.

8. The traveling wave ranging current transformer according to claim 1, characterized in that: The clamping frames are evenly distributed on the inner wall of the fixing seat and are arc-shaped.

9. The traveling wave ranging current transformer according to claim 1, characterized in that: The clamp housing is in a square frame shape or a ring shape.

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