Array antenna based multiple local discharge point positioning and distinguishing method for local discharge detection device

An antenna array and partial discharge detection technology, applied in the direction of testing dielectric strength, etc., can solve the problem of inaccurate positioning of partial discharge points

Inactive Publication Date: 2015-05-13
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for locating multiple PD points of a PD detection device based on an antenna array, so as to solve the technical problem of inaccurate positioning of PD points in the prior art

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  • Array antenna based multiple local discharge point positioning and distinguishing method for local discharge detection device
  • Array antenna based multiple local discharge point positioning and distinguishing method for local discharge detection device
  • Array antenna based multiple local discharge point positioning and distinguishing method for local discharge detection device

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0050] The partial discharge detection device based on the antenna array includes a transport vehicle, a rotatable pan-tilt installed on the transport vehicle, and an antenna array installed on the pan-tilt. A camera is installed at the center of the rhombus formed. The acute angle of the inner angle of the rhombus is 60°. The rotatable pan / tilt can rotate 360° horizontally and ‐40° to 70° vertically (the horizontal direction is 0°). The detection antenna can be a UHF antenna. like figure 1 Shown is the circuit principle block diagram of the partial discharge detection device based on the antenna array. The detection antenna is connected to the main control computer through the signal acquisi...

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Abstract

The invention discloses an array antenna based multiple local discharge point positioning method for a local discharge detection device. The array antenna based multiple local discharge point positioning method comprises the steps of establishing a position equation related to local discharge points according to time difference of local discharge signals received by detection antennae and calculating direction angles of the local discharge points; enabling a master control computer to control rotation of cloud platforms of the detection antennae according to the input direction angles till the detection antennae receives the local discharge signals at the same moment; controlling shooting of a video camera, accordingly obtaining images of the local discharge signals and achieving positioning of the local discharge signals. The array antenna based multiple local discharge point positioning method for the local discharge detection device adopts a canonical correlation technology to estimate the number of local discharge sources; adopting a multiple signal classifying algorithm and utilizing covariance matrixes of the received data to separate out local discharge spaces and noise sub-spaces, utilizing direction vectors of the local discharge signals and orthogonality of the noise sub-spaces to form a space angle spectrum, wherein the spectrum peak positions shows the orientations of target signals.

Description

technical field [0001] The invention relates to a method for locating multiple partial discharge points of a partial discharge detection device based on an antenna array, and also relates to a method for distinguishing multiple partial discharge points of a partial discharge detection device based on an antenna array, which belongs to the technical field of electric power detection. Background technique [0002] Partial discharge will produce electromagnetic waves, sound, light, heat and other physical and chemical phenomena. According to the analysis and processing of these quantities, the location of the partial discharge source can be obtained. The application of array technology to locate partial discharge is a new method that has emerged in recent years. This method has high positioning accuracy and can locate multiple partial discharge sources that occur simultaneously. Contents of the invention [0003] The purpose of the present invention is to provide a method for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 陈昱同王天正晋涛梁基重刘永鑫
Owner STATE GRID CORP OF CHINA
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