External insulation strength discriminating method and system of contaminated insulators based on acoustic emission signals
A technology of acoustic emission signals and discrimination methods, applied in the direction of testing dielectric strength, etc., can solve the problems of complex on-site installation and debugging, high cost, and complicated operation, and achieve system installation and operation that are simple, easy to accept and master, and easy to The effect of promotion
Inactive Publication Date: 2013-02-20
GUANGZHOU POWER SUPPLY CO LTD
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Problems solved by technology
The equivalent salt density method and the conductivity method use manual measurement, the operation is more complicated, and the external insulation state of the dirty insulator cannot be judged in real time. The leakage current method needs to modify the insulator to install a current sensor. The on-site installation and debugging are complicated and the cost is high.
Therefore, these three methods cannot meet the requirements of field work.
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] figure 1 It is a flow chart of the method for judging the external insulation strength of polluted insulators based on acoustic emission signals in the present invention, including:
[0021] S101: extracting the energy and spectrum information of the acoustic emission signal of the insulator pollution discharge;
[0022] S102: Divide the external dielectric strength of the dirty insulator according to preset standards, and judge the external dielectric strength of the dirty insulator;
[0023] S103: Publish insulator pollution flashover warning information according to the external insulation strength.
[0024] Theoretical research shows that during the whole process of the development of insulator pollution discharge, the appearance of discharge is inter...
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The invention discloses an external insulation strength discriminating method and system of contaminated insulators based on acoustic emission signals. The method comprises the following steps of: extracting energy and frequency spectrum information of the contaminated discharge acoustic emission signals of the insulators; dividing the external insulation strength of the contaminated insulators according to a preset standard and discriminating the external insulation strength of the contaminated insulators; and publishing pollution flashover warning information of the insulators according to the external insulation strength. The external insulation strength discriminating method and system can be used for implementing the discrimination of the external insulation strength of the insulators and the pollution flashover warning of the insulators, and are low in cost and easy to popularize.
Description
technical field [0001] The invention relates to electrical equipment state monitoring and fault diagnosis technology, in particular to a method and system for judging the external insulation strength of polluted insulators based on acoustic emission signals. Background technique [0002] The operating environment of insulators is harsh, and contamination on the surface is inevitable. When encountering humid weather such as fog, drizzle, dew, etc., the electric strength of the insulator will drop significantly, which will easily cause pollution flashover accidents, that is, pollution flashover. Pollution flashover accidents are extremely harmful and seriously threaten the safe and stable operation of the power system. However, planned regular cleaning and maintenance and corresponding anti-pollution flashover measures cannot prevent the occurrence of pollution flashover accidents. Therefore, carrying out pollution monitoring of insulators, judging the external insulation st...
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IPC IPC(8): G01R31/12
Inventor 易满成舒乃秋黄慧红李自品李智宁方健彭辉汪游胤陈俊
Owner GUANGZHOU POWER SUPPLY CO LTD