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10kV switch cabinet status detection method

A state detection and switchgear technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as the inability to accurately reflect the state of switchgear, and achieve safe and stable operation, wide application, and significant social benefits. and economic effects

Active Publication Date: 2017-06-09
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

This judgment standard obviously cannot accurately reflect the state of the switchgear. Therefore, it is urgent to establish a judgment standard for the state of the switchgear based on the identification of partial discharge defect types.

Method used

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  • 10kV switch cabinet status detection method
  • 10kV switch cabinet status detection method
  • 10kV switch cabinet status detection method

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Embodiment Construction

[0048] 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. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0049] Such as figure 1 As shown, the present invention provides a kind of 10kV switchgear state detection method, comprises the following steps:

[0050] Step 1. Establish a 10kV switchgear test platform including a typical partial discharge defect model;

[0051] Step 2. Measure and count the transient ground potential signal of the partial discharge defect to obtain the defect statistical map;

[0052] Step 3. Count the defect statistical maps of variou...

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Abstract

The invention provides a 10kV switch cabinet status detection method comprising the following steps: building a 10kV switch cabinet test platform; getting defect statistic maps and a status judging standard comparison library; measuring the transient ground electric wave amplitude of partial discharge of a switch cabinet; judging whether the transient ground electric wave amplitude is higher than background noise; comparing the statistic map of the switch cabinet with the defect statistic maps in the status judging standard comparison library and calculating the correlation, and getting and comparing the final values of the statistic map of the detected switch cabinet and all the defect statistic maps in the status judging standard comparison library, and setting the map with maximum value as a judgment result; and evaluating the status of the current 10kV switch cabinet. Through the method presented by the invention, the deficiency of the traditional status judging standard method for switch cabinet status estimation built according to a threshold method is avoided, and the real status of a switch cabinet can be reflected accurately, efficiently and reliably. Moreover, the operation stability and safety of 10kV switch cabinets are improved, and the operation stability and safety of the distribution network are guaranteed.

Description

technical field [0001] The invention relates to the field of measurement and testing of power distribution equipment, in particular to a method for detecting the state of a 10kV switch cabinet. Background technique [0002] The switchgear is an important equipment in the distribution network. Correctly evaluating its status and taking corresponding measures in time according to the evaluation results are effective means to ensure the safe and stable operation of the distribution network. By measuring the transient earth potential (TEV), it is a common method to find the partial discharge inside the switchgear, and the amplitude of the transient earth potential is an important basis for evaluating the state of the switchgear. [0003] At present, in the state evaluation of the switchgear, the judgment standard of the switchgear state adopts the threshold method based on experience. When the measured amplitude of the transient ground potential is lower than 20dB, the state of ...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 范闻博关石磊符金伟王伟刘岚雷浩亮李柏奎李东良
Owner CHINA ELECTRIC POWER RES INST
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