Grid Fault Partitioning Method

Abstract

A power grid fault partitioning method comprises the steps that firstly, the vulnerability indexes of circuits in a power grid are established to form a vulnerability circuit set of the power grid; secondly, when the power grid breaks down, whether the fault happens in the vulnerability circuit set or not is judged, if yes, the third step is executed, and if not, the process is ended; thirdly, a fault circuit node or a node of a vulnerability circuit connected with the fault circuit serves as the starting point, the vulnerability index of the circuit connected with the node is judged, if the vulnerability index is smaller than the preset threshold value, the fault circuit or the vulnerability circuit is classified into a boundary circuit, if not, the other node of the fault circuit or the vulnerability circuit is classified into a fault area, and the vulnerability indexes of the circuit connected with the other node continue to be judged till the boundary circuit is found; fourthly, the power grid is divided into the fault area or a non-fault area. By means of the power grid fault partitioning method, when the fault happens, the fault circuit can be isolated in a small area, the fault cannot spread in a large area, and serious power outage is prevented.

Description

technical field [0001] The invention relates to the field of electric power system equipment, in particular to a grid fault partitioning method. Background technique [0002] At present, with the increasing scale of the power grid, once a power grid failure occurs, the losses to people are also increasing. In 2003, large-scale power outages occurred in the United States, Canada, the United Kingdom, Russia and other countries. Among them, the major power outage in the United States and Canada on August 14 affected an area of ​​about 24,000 square kilometers (9,300 square miles) , As many as 50 million people were affected, and the New York area alone had a power outage for 29 hours. During this period, the total number of lost loads in New York was 179 million kwh, and its economic loss was as high as 30 billion US dollars. At the beginning of 2008, continuous freezing, rainy and snowy weather hit southern China, causing a large-scale power outage in the Southern Power Grid....

AI Technical Summary

Problems solved by technology

It can be seen that the research on power grid structural vulnerability is only related to the topological structure of the power grid itself, and cannot reflect the changing state of the power grid; while the research on state vulnerability considers the changing state of the power grid, but ignores the key factor affecting the reliability of the power grid—the power grid. structure

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