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Electric network failure diagnosis device and method

A power grid fault and diagnosis method technology, applied in the direction of fault location, etc., can solve problems such as inability to diagnose, lack of information, inaccuracy, etc., and achieve the effect of ensuring safe and stable operation

Inactive Publication Date: 2008-09-17
NORTHEASTERN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The improved generalized rough set reduction algorithm solves the problem of inability to diagnose or inaccurate diagnosis due to lack of information when large-scale cascading failures occur in the system

Method used

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  • Electric network failure diagnosis device and method
  • Electric network failure diagnosis device and method
  • Electric network failure diagnosis device and method

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Experimental program
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Embodiment Construction

[0075] The present invention will be further described with reference to the drawings:

[0076] Such as figure 1 As shown, the software flow chart of the system includes the following steps:

[0077] Step 1 Download the fault database of the power grid and process it to form a rule database;

[0078] Step 2 Use the collecting device to collect the voltage and current of the power grid, the on / off status signal of the circuit breaker and the action signal of the relay protection;

[0079] Step 3 Perform online fault diagnosis;

[0080] Step 4 Upload the fault information to the upper computer of the device, and add the fault online.

[0081] The total flow chart of fault information system processing is as follows figure 2 Shown. The basic operating indicators of the present invention are as follows: the total time for the fault protection device to send the information to the host computer is not more than 2S, the database capacity: 500 points of analog data, 2,000 points of swi...

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PUM

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Abstract

A power system fault diagnostic method belongs to the power system dispatch and fault analysis domain, comprising: step 1 of downloading the fault data base of the power system to process to form a rule base; step 2 of collecting the voltage of the power system, current, the on off state signal of the breaker and the action signal of the relaying protection using the collecting device; step 3 of performing on-line fault diagnosis; step 4 of uploading the fault information to the host computer of the device and on-line adding the fault. The prior data collecting device, the mature technique and the outlying theoretical knowledge are combined together. The modified general rough intensivism contracted calculation can solve the problem that it is incapable for diagnosing or accurately diagnosing due to information deletion when the large scale chain fault generates. Especially the method can solves the fault diagnosis under 'avalanche data' which can not be solved by conventional method and ensure the system safely and stably run under each condition.

Description

Technical field [0001] The invention belongs to the field of power grid dispatching and fault analysis, and particularly relates to a power grid fault diagnosis device and method. Background technique [0002] The fault information system is characterized by the integrated digital protection and fault recorder information to fully cover the important information required for grid fault analysis, such as circuit breaker tripping, protection actions, system currents, voltage amplitudes, phase angles, etc. And through the clock record with GPS global unified system to realize the organic correlation of the above information, in order to obtain a reasonable judgment on the power grid fault event and protection action behavior. As the key information of the fault information system, the input source digital protection and fault recorder data output method, transmission protocol, and the time synchronization method of the device are the basis for the collection, integration and effecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 张化光孙秋野杨东升王占山辛红刘赫男梁志珊宋武琪宋轩刘国威
Owner NORTHEASTERN UNIV
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