阅读说明：本技术 一种输电线路电晕放电检测系统 (Transmission line corona discharge detecting system ) 是由 陈振宇 张晓龙 余晶晶 熊鸿楗 寸杰宏 李延龙 蒋正虎 杨尚玉 王华楠 陆雪峰 于 2018-05-28 设计创作，主要内容包括：本发明公开了一种输电线路电晕放电检测系统,包括检测天线,所述检测天线包括中心馈电接口和用于接收电晕放电信号的天线结构,所述天线结构包括第一天线部和第二天线部,第一天线部绕所述中心馈电接口旋转180度后与所述第二天线部重合,第一天线部的外部轮廓包括第一轮廓线、第二轮廓线和第三轮廓线,所述第三轮廓线连接于第一轮廓线和第二轮廓线的末端之间,所述第一轮廓线为始端距离所述中心馈电接口第一预设距离的螺旋线,所述第二轮廓线为始端距离所述中心馈电接口第二预设距离的螺旋线,所述第三轮廓线为以所述中心馈电接口为圆心的圆弧线。与原有的天线相比,本发明增加了天线结构的渐变性,所以体积更小,解决了传统天线的不便携的问题。(The invention discloses a corona discharge detection system of a power transmission line, which comprises a detection antenna, wherein the detection antenna comprises a central feed interface and an antenna structure for receiving a corona discharge signal, the antenna structure comprises a first antenna part and a second antenna part, the first antenna part rotates 180 degrees around the central feed interface and then is superposed with the second antenna part, the outer contour of the first antenna part comprises a first contour line, a second contour line and a third contour line, the third contour line is connected between the tail ends of the first contour line and the second contour line, the first contour line is a spiral line with a first preset distance from the starting end to the central feed interface, the second contour line is a spiral line with a second preset distance from the starting end to the central feed interface, and the third contour line is an arc line with the central feed interface as the circle center. Compared with the prior antenna, the invention increases the gradual change of the antenna structure, thereby having smaller volume and solving the problem of non-portability of the traditional antenna.)

1. A corona discharge detection system of a power transmission line is characterized by comprising a detection antenna, wherein the detection antenna comprises a central feed interface and an antenna structure for receiving a corona discharge signal, the antenna structure comprises a first antenna part and a second antenna part, the first antenna part is superposed with the second antenna part after rotating 180 degrees around the center feed interface, the outer profile of the first antenna portion comprises a first profile line, a second profile line and a third profile line, the third contour line is connected between the tail ends of the first contour line and the second contour line, the first contour line is a spiral line with the starting end being a first preset distance away from the center feed interface, the second contour line is a spiral line with the starting end away from the center feed interface by a second preset distance, and the third contour line is an arc line with the center feed interface as a circle center.

2. The system of claim 1, wherein a proposed planar coordinate system is provided with the center feed interface as the origin of coordinates, and the trajectory of the first contour line is: and a0, a1, b1 and w are parameters with preset values, wherein the straight line distance between a point with an angle on the first contour line and the center feed interface is represented, and the straight line distance is less than 360 degrees and not less than 0 degree.

3. The system of claim 1, wherein a proposed planar coordinate system is provided with the center feed interface as the origin of coordinates, and the second contour line has a trajectory: and a0, a1, b1, w and phi are parameters with preset values, wherein the straight line distance between a point with the angle on the second contour line and the center feed interface is represented, and the straight line distance is less than 360 degrees and not less than 0 degree.

4. The transmission line corona discharge detecting system of claim 1, wherein the starting end of the first curve and the starting end of the second curve are connected through a fourth contour line, and the first contour line, the second contour line, the third contour line and the fourth contour line together enclose an outer contour of the first antenna part.

5. The transmission line corona discharge detection system of claim 4 wherein the beginning of said first curve, the beginning of said second curve and said center feed interface are arranged in a common line.

6. The transmission line corona discharge detection system of claim 5 wherein said fourth profile is a straight line.

7. The power transmission line corona discharge detection system of claim 1 wherein said center feed interface is a coaxial cable feed interface.

8. The transmission line corona discharge detection system of claim 1 wherein said detection antenna further comprises a dielectric plate carrying said antenna structure.

Technical Field

The invention relates to the field of power transmission lines, in particular to a corona discharge detection system for a power transmission line.

Background

In a corona discharge detection system of a power transmission line, a detection antenna is a crucial loop. However, the size of the conventional antenna design is large, and the detection system cannot be made portable.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a corona discharge detection system for a power transmission line, aiming at the defect of large size in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a transmission line corona discharge detecting system, includes central feed interface and the antenna structure who is used for receiving corona discharge signal, antenna structure includes first antenna portion and second antenna portion, first antenna portion winds after the rotatory 180 degrees of central feed interface with second antenna portion coincidence, the external profile of first antenna portion includes first profile line, second profile line and third profile line, third profile line is connected between the end of first profile line and second profile line, first profile line is the initial end distance the first helix of predetermineeing the distance of central feed interface, the second profile line is the initial end distance the helix of center feed interface second predetermined distance, third profile line be with the circular arc line of center of a circle is the central feed interface.

in the corona discharge detection system of the power transmission line, a plane coordinate system is proposed by taking a center feed interface as a coordinate origin, and the track of the first contour line is as follows: and a0, a1, b1 and w are parameters with preset values, wherein the straight line distance between a point with an angle on the first contour line and the center feed interface is represented, and the straight line distance is less than 360 degrees and not less than 0 degree.

In the corona discharge detection system of the power transmission line, a plane coordinate system is proposed by taking a center feed interface as a coordinate origin, and the track of the second contour line is as follows: and a0, a1, b1, w and phi are parameters with preset values, wherein the straight line distance between a point with the angle on the second contour line and the center feed interface is represented, and the straight line distance is less than 360 degrees and not less than 0 degree.

In the corona discharge detection system for the power transmission line, the initial end of the first curve and the initial end of the second curve are connected through a fourth contour line, and the first contour line, the second contour line, the third contour line and the fourth contour line jointly enclose to form the outer contour of the first antenna part.

In the corona discharge detection system for the power transmission line, the starting end of the first curve, the starting end of the second curve and the central feed interface are distributed in a collinear manner.

In the corona discharge detection system of the power transmission line, the fourth contour line is a straight line.

In the corona discharge detection system of the power transmission line, the central feed interface is a coaxial cable feed interface.

In the corona discharge detection system of the power transmission line, the detection antenna further comprises a dielectric plate for bearing the antenna structure.

The corona discharge detection system for the power transmission line has the following beneficial effects: the external outline of the antenna part in the detection antenna is formed by combining the two spiral lines with the arc line, the arc line is connected between the tail ends of the two spiral lines, and the combination of the three forms a gradual change type structure.

Drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:

Fig. 1 is a schematic diagram of an antenna structure according to a preferred embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The terms including ordinal numbers such as "first", "second", and the like used in the present specification may be used to describe various components, but the components are not limited by the terms. These terms are used only for the purpose of distinguishing one constituent element from other constituent elements. For example, a first component may be named a second component, and similarly, a second component may also be named a first component, without departing from the scope of the present invention.

The general idea of the invention is as follows: the utility model provides a transmission line corona discharge detecting system, includes the detection antenna, the detection antenna includes central feed interface and is used for receiving corona discharge signal's antenna structure, antenna structure includes first antenna portion and second antenna portion, first antenna portion winds central feed interface rotate 180 degrees after with second antenna portion coincidence, the external profile of first antenna portion includes first contour line, second contour line and third contour line, third contour line is connected between the end of first contour line and second contour line, first contour line is the top distance the first helix of predetermineeing the distance of central feed interface, the second contour line is the top distance the helix of center feed interface second predetermineeing the distance, third contour line be with central feed interface is the circular arc line of the centre of a circle.

In order to better understand the technical solutions, the technical solutions will be described in detail below with reference to the drawings and the specific embodiments of the specification, and it should be understood that the embodiments and specific features of the embodiments of the present invention are detailed descriptions of the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features of the embodiments and examples of the present invention may be combined with each other without conflict.

The detection antenna in the preferred embodiment includes: the antenna comprises a central feed interface, an antenna structure for receiving a corona discharge signal and a dielectric plate for bearing the antenna structure. Fig. 1 is a schematic diagram of an antenna structure according to a preferred embodiment of the present invention. The antenna structure includes a first antenna portion and a second antenna portion, and the first antenna portion is rotated 180 degrees around the center feed interface (i.e., the entire first antenna portion is rotated around a designated point when the center feed interface is used as the designated point) and then coincides with the second antenna portion.

Preferably, the central feeding interface is a coaxial cable feeding interface.

The outer contour of the first antenna part is formed by the common enclosing of a first contour line, a second contour line, a third contour line and a fourth contour line. The third contour line is connected between the ends of the first contour line and the second contour line, wherein the fourth contour line is connected between the beginning of the first curve and the beginning of the second curve. The distribution of the beginning of the first curve, the beginning of the second curve and the center feed interface is collinear.

Specifically, first contour line is the initial end distance the first helix of predetermineeing the distance of center feed interface, the second contour line is the initial end distance the helix of predetermineeing the distance of center feed interface second, the third contour line is for using the circular arc line of center feed interface as the centre of a circle, fourth contour line is the straight line. The first preset distance and the second preset distance are both smaller preset distances.

Preferably, a plane coordinate system is proposed with the center feed interface as a coordinate origin, and the trajectory of the first contour line is: the trajectory of the second contour line is:

In the above equation, the straight line distance from the point where the angle on the first or second contour line is from the center feed interface is represented. Wherein, a0, a1, b1, w and phi are all parameters with preset values, and the angle is less than 360 degrees and not less than 0 degree. For example, in a preferred embodiment, a0 is-1.562 e +09, a1 is 1.562e +09, b1 is-9675, w is-3.369 e-05, and φ is π/2. After the numerical value of the distance of each point is calculated through the formula, units can be selected according to requirements.

In summary, the corona discharge detection system for the power transmission line provided by the invention has the following beneficial effects: the external outline of the antenna part in the detection antenna is formed by combining the two spiral lines with the arc line, the arc line is connected between the tail ends of the two spiral lines, and the combination of the three forms a gradual change type structure.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.