CN-121978482-A - External transformer partial discharge ultrahigh frequency sensor and installation method

CN121978482ACN 121978482 ACN121978482 ACN 121978482ACN-121978482-A

Abstract

The invention discloses an external transformer partial discharge ultrahigh frequency sensor and an installation method thereof, belonging to the technical field of antennas, wherein the method comprises the steps that one surface of the external transformer partial discharge ultrahigh frequency sensor provided with a radiation patch faces to a grounding copper bar of a transformer and is not in direct contact with the grounding copper bar; the external transformer partial discharge ultrahigh frequency sensor comprises a dielectric substrate and a radiation patch, wherein the radiation patch is arranged on a first surface of the dielectric substrate, and the radiation patch is of a rectangular array window structure. The sensor is arranged near the grounding copper bar outside the transformer, so that the problem that the sensor is arranged inside the transformer in the prior art can be solved. The invention does not need to modify the internal structure of the transformer and has no influence on the internal insulation of the transformer.

Inventors

MA ZHIQIN
CAI LINGLONG
WU ZHIYUN
LIAO ZIHAO
ZHOU DAN
RAO ZHANGQUAN
WEN AIHUI
LI ZHONGXIANG

Assignees

广东电网有限责任公司电力科学研究院

Dates

Publication Date: 20260505
Application Date: 20260211

Claims (10)

1. The method for installing the external partial discharge ultrahigh frequency sensor of the transformer is characterized by comprising the following steps of: The method comprises the steps that one surface of an external transformer partial discharge ultrahigh frequency sensor provided with a radiation patch faces to a grounding copper bar of a transformer and is not in direct contact with the grounding copper bar; the external transformer partial discharge ultrahigh frequency sensor comprises a dielectric substrate and a radiation patch; The radiation patch is arranged on the first surface of the dielectric substrate; The radiation patch is of a rectangular array window structure.
2. The external transformer partial discharge ultrahigh frequency sensor is characterized by comprising a dielectric substrate and a radiation patch; The radiation patch is arranged on the first surface of the dielectric substrate; The radiation patch is of a rectangular array window structure.
3. The partial discharge ultrahigh frequency sensor of the external transformer of claim 2, further comprising a microstrip transmission line and a coaxial connector; The coaxial connector is welded at the edge of the dielectric substrate; the radiation patch is connected with the coaxial connector through the microstrip transmission line.
4. The external transformer partial discharge ultrahigh frequency sensor of claim 2, wherein the dielectric substrate is of a rectangular structure; The second surface of the dielectric substrate is provided with a grounding surface.
5. The partial discharge ultrahigh frequency sensor of an external transformer according to claim 2, wherein the dielectric substrate is made of FR4 material, and the dielectric constant of the dielectric substrate is 4.4.
6. The external transformer partial discharge ultrahigh frequency sensor of claim 2, wherein a plurality of rectangular windows are arranged in the radiation patch; the rectangular array window structure of the radiation patch is a structure of 1 row by N column, wherein N is the number of rectangular windows.
7. The external transformer partial discharge uhf sensor of claim 2, wherein the coaxial connector is a BNC interface.
8. The external transformer partial discharge ultrahigh frequency sensor of claim 2, wherein the radiation patch has a detection frequency band of 0.7-1.5GHz.
9. The external transformer partial discharge uhf sensor of claim 2, wherein the dielectric substrate has a width equal to a width of the ground copper bar.
10. The external transformer partial discharge ultrahigh frequency sensor of claim 2, wherein antenna side ears are designed on two sides of the radiating patch.

Description

External transformer partial discharge ultrahigh frequency sensor and installation method Technical Field The invention relates to the technical field of antennas, in particular to an external transformer partial discharge ultrahigh frequency sensor and an installation method. Background Current partial discharge detection techniques include electrical detection techniques and non-electrical detection techniques. The electric detection technology mainly comprises a pulse current method, a high-frequency current method and an ultrahigh frequency method. The ultra-high frequency detection frequency band has the advantage of higher anti-interference capability, and is widely applied. The existing ultrahigh frequency sensor is mainly installed inside a transformer for detection, such as an oil valve type ultrahigh frequency sensor, or a medium window is arranged on the wall of a transformer box through holes, and the ultrahigh frequency sensor is installed in the medium window. The mode of installing the sensor in the transformer can influence the internal insulation of the transformer, has potential insulation hazards, and meanwhile, the built-in ultrahigh frequency sensor cannot be directly applied to the transformer for on-site operation of the transformer substation. Disclosure of Invention The invention provides an external transformer partial discharge ultrahigh frequency sensor and an installation method, which can solve the problem of installation of the sensor in the transformer in the prior art. The embodiment of the invention provides an installation method of an external transformer partial discharge ultrahigh frequency sensor, which comprises the following steps: The method comprises the steps that one surface of an external transformer partial discharge ultrahigh frequency sensor provided with a radiation patch faces to a grounding copper bar of a transformer and is not in direct contact with the grounding copper bar; the external transformer partial discharge ultrahigh frequency sensor comprises a dielectric substrate and a radiation patch; The radiation patch is arranged on the first surface of the dielectric substrate; The radiation patch is of a rectangular array window structure. The invention also provides an external transformer partial discharge ultrahigh frequency sensor, which comprises a dielectric substrate and a radiation patch; The radiation patch is arranged on the first surface of the dielectric substrate; The radiation patch is of a rectangular array window structure. Further, the external transformer partial discharge ultrahigh frequency sensor also comprises a microstrip transmission line and a coaxial connector; The coaxial connector is welded at the edge of the dielectric substrate; the radiation patch is connected with the coaxial connector through the microstrip transmission line. Further, the dielectric substrate is of a rectangular structure; the second surface of the dielectric substrate is provided with a grounding surface. . Further, the dielectric substrate is made of FR4 material, and the dielectric constant of the dielectric substrate is 4.4. Further, a plurality of rectangular windows are arranged in the radiation patch; the rectangular array window structure of the radiation patch is a structure of 1 row by N column, wherein N is the number of rectangular windows. Further, the coaxial connector is a BNC interface. Further, the detection frequency band of the radiation patch is 0.7-1.5GHz. Further, the width of the dielectric substrate is equal to the width of the grounding copper bar. Further, antenna side ears are designed on two sides of the radiation patch. The invention has the following beneficial effects: The external transformer partial discharge ultrahigh frequency sensor is characterized in that one surface of the external transformer partial discharge ultrahigh frequency sensor provided with a radiation patch faces to a grounding copper bar of a transformer and is not in direct contact with the grounding copper bar, the external transformer partial discharge ultrahigh frequency sensor comprises a dielectric substrate and a radiation patch, the radiation patch is arranged on a first surface of the dielectric substrate, and the radiation patch is of a rectangular array window structure. According to the invention, the sensor is arranged near the grounding copper bar outside the transformer, so that the internal structure of the transformer is not required to be modified, and the insulation inside the transformer is not influenced. Drawings In order to more clearly illustrate the technical solutions of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. Fig. 1 is a