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

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 ofthe 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...

AI Technical Summary

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 automatic identification and control method for large power grid cascading faults and remote multi-point faults, and to take corresponding control measures , to prevent grid collapse caused by fault cascading expansion

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