Backbone network frame search method considering element comprehensive importance and network survivability

Abstract

The invention discloses a backbone network frame search method considering element comprehensive importance and network survivability. The method comprises the steps of introducing an economic factor based on conventional electric betweenness, and establishing an index for evaluating branch importance; according to node neighbor information and a clustering coefficient, establishing an index for evaluating node importance; based on the branch and node importance indexes, and by introducing a whole network survivability index, building a backbone network frame mathematic model considering element importance and network survivability; and based on a guide fireworks algorithm, implementing the model. According to the method, a line importance index, the node importance index and the network survivability index are combined; the backbone network frame mathematic model considering the element comprehensive importance and the network survivability is built; the model can assess the importance of lines and nodes in a power system more comprehensively, so that a most reasonable backbone network frame is obtained and the capability of a power grid in resisting a power failure accident is improved; and the method is suitable for construction of the backbone network frame of the power grid and reconstruction calculation of the power grid.

Description

technical field [0001] The invention relates to a backbone grid search method considering the comprehensive importance of components and network invulnerability, and belongs to the field of grid backbone grid construction and grid reconfiguration calculation. Background technique [0002] With the large-scale and multi-regional interconnection construction of the transmission network, the power grid's ability to resist large-scale power outages is gradually enhanced. However, there are unavoidable extreme weather and natural disasters in nature, which will bring different degrees of damage to power facilities and cause irresistible large-scale power outages, which will cause huge economic losses and adverse social impacts. In order to improve the power grid's ability to resist power outages and help power supply restoration and reconstruction after a major power outage, a backbone grid is often built in the power grid. In order to find an optimal search method for the backb...

AI Technical Summary

Problems solved by technology

Although this type of method can search the grid skeleton, it does not fully consider the importance of each link of the grid, such as components, lines, and nodes, and is imprecise, impractical, and incomplete when searching for the backbone grid of the grid. Problems, such as: the component importance index is used as one of the elements of the objective function, but they only evaluate the component importance from the structural aspect, without considering other attributes of the component; use the cost-benefit method to select important branches and build the backbone network, and other The branch importance evaluation index is constructed based on the functions of the backbone network frame, and cannot reflect the importance of the branch to the entire network.

Therefore, so far, there is no backbone network search method that can comprehensively consider components, lines and nodes and at the same time consider the network invulnerability.

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