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Electric network failure diagnosis device and method

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

Inactive Publication Date: 2011-03-16
NORTHEASTERN UNIV LIAONING +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

[0074] The present invention is further described in conjunction with accompanying drawing:

[0075] Such as figure 1 As shown, the software flow chart of the system includes the following steps:

[0076] Step 1 downloads the fault database of the power grid, and processes it to form a rule base;

[0077] Step 2: Using the acquisition device to collect the voltage and current of the power grid, the switch state signal of the circuit breaker and the action signal of the relay protection;

[0078] Step 3 carries out online fault diagnosis;

[0079] Step 4 Upload the fault information to the upper computer of the device, and add the fault online.

[0080] The general flowchart 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 status quantity of the fault protection device to be changed and sent to the upper computer is not more than 2S, and the database capacit...

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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 in particular relates to a power grid fault diagnosis device and method. Background technique [0002] The feature of the fault information system is that it integrates the information of digital protection and fault recorder to completely cover the important information required for power grid fault analysis, such as circuit breaker tripping, protection action, system current, voltage amplitude, phase angle, etc. And realize the organic association of the above information through the clock record with the global unified system of GPS, so as to obtain a reasonable judgment on the fault event of the power grid and the protection action behavior. As the key information of the fault information system, the digital protection of the input source and the data output mode of the fault recorder, the transmission protocol, and the time synchronization mode of the device are t...

Claims

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Application Information

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Patent Type & Authority Patents(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 LIAONING