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A Direction of Arrival Estimation System in Station Space for Discharge Sources in Substations

A technique for estimating and discharging sources, used in radio wave measurement systems, instruments, measuring devices, etc.

Active Publication Date: 2021-09-28
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, relevant scholars have derived a space DOA (azimuth and elevation angle) estimation algorithm, but it is only applicable to the array arrangement where two pairs of antennas are perpendicular to each other, and it is necessary to propose an estimation algorithm suitable for any four-element planar array

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  • A Direction of Arrival Estimation System in Station Space for Discharge Sources in Substations
  • A Direction of Arrival Estimation System in Station Space for Discharge Sources in Substations
  • A Direction of Arrival Estimation System in Station Space for Discharge Sources in Substations

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0021] Examples of the described embodiments are shown in the drawings, wherein like or similar reference numerals designate like or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0022] Such as figure 1 As shown, a station-space DOA estimation system for a substation discharge source provided by the present invention includes four omnidirectional antennas located on the same plane. In this embodiment, the antennas all adopt an omnidirectional biconic...

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Abstract

The invention discloses a station-space direction-of-arrival estimation system for a substation discharge source, which includes four omnidirectional antennas located on the same plane. Direction of arrival estimation includes the following steps: 1) using interpolation cross-correlation method to estimate the time difference between signals received by each antenna; 2) using direction of arrival estimation method to calculate the azimuth and elevation angle of the discharge source. The antenna array in the present invention has the advantages of small size and is suitable for narrow inspection channels of substations. Through the intersection of estimation results of multiple test points, the coordinates of the discharge source can be accurately calculated, and then the location of the discharge device can be determined.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation state diagnosis, in particular to a station-space direction-of-arrival estimation system for a substation discharge source. Background technique [0002] At present, the UHF partial discharge detection carried out at home and abroad usually fixedly install the sensor on specific single equipment such as GIS and transformer, and the partial discharge detection and positioning of substation equipment are mainly carried out for specific equipment. Partial discharge may occur in any high-voltage power equipment in the substation. To monitor the primary electrical equipment of the whole station, it is necessary to install partial discharge monitoring devices on all equipment, which is extremely expensive. A new type of movable UHF antenna array is used to establish a mobile platform, and to use less UHF sensor matrix to implement all-round partial discharge inspection and position...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 王刘芳秦少瑞李坚林程登峰丁国成朱太云宋东波秦金飞张晨晨李平
Owner STATE GRID CORP OF CHINA
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