Automatic recognition control method for large electric network catenation fault and hetero-position multi-point fault

A technology of cascading failures and multi-point failures, applied in computer control, general control systems, control/regulation systems, etc., to achieve high reliability and avoid overweight

Active Publication Date: 2008-11-05
NARI TECH CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art relying on manual scheduling to control large power grid cascading faults and remote multi-point faults, to provide an aut

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  • Automatic recognition control method for large electric network catenation fault and hetero-position multi-point fault
  • Automatic recognition control method for large electric network catenation fault and hetero-position multi-point fault

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Embodiment Construction

[0024] The following is a preferred embodiment of the present invention, including the power system safety and stability control device realized by the method of the present invention. Other characteristics, objects and advantages of the present invention can also be seen from the description of the embodiments and the drawings.

[0025] From figure 2 It can be seen from the figure that the power system stability control device has 1 main station and 6 sub-stations, and the 6 sub-stations collect the analog and binary inputs of the system, involving a total of n components. When a fault occurs, the acquisition and judgment unit of the sub-station itself judges the fault and sends it to the master station.

[0026] Assume that component 1 fault e1, component 2 fault e2, and component 3 fault e3 occur in substation 1, substation 2, and substation 3 respectively, and the fault occurrence time is 0 time, 4 seconds, and 8.5 seconds respectively, and the fault period T is set as ...

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Abstract

An automatic identification control method of the power pool chain failure and allopatry multipoint failure, including four steps: (1) building the mapping function of the forecast failure set and the failure element; (2) building a table Z with n*n elements and obtaining the values of each element; (3) building another table Q with n*n elements, wherein the initial value of the element is zero, when the element i goes out of order, the value of the element in i-rank row of table Q is the same with that in table Z, then looking up the presence of nonzero element in the i-th row of the table Q, namely the forecast failure of the failure set; (4) setting the value of the element in the i-th rank of table Q as zero after the element i goes out of order for the period T, namely the failure of the element i invalidates, so the failure generated afterwards is not combined with the failure. The invention has fast judging speed and high reliability.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and more precisely, the invention relates to an automatic identification and control method for cascading faults of a large power grid and multi-point faults in different places. Background technique [0002] After a serious fault occurs in a large power grid, it often manifests as a sharp overload of the power generation and transmission equipment at the sending end. Due to the lack of power supply at the power receiving load center, the voltage and cycle will drop sharply. The result is like a "domino effect". Disintegrates in seconds. Therefore, automatic identification of cascading faults and remote multi-point faults in large power grids, and taking corresponding control measures can prevent the collapse of the power grid caused by the cascading expansion of faults. [0003] Existing methods can only identify the failure of a single component or the N-2 faults of local compo...

Claims

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Application Information

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IPC IPC(8): H02H7/26H02H7/28G06Q50/00G05B15/02G06Q50/06
Inventor 李雪明刘华伟宣筱青罗建裕陈永华李海峰
Owner NARI TECH CO LTD
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