A small-world power grid cascading fault suppression method

Abstract

The invention relates to a small world power grid cascading failure restraining method. The method comprises the steps that according to a network state before failure and specific information of a primary failure, a corresponding cascading failure restraining method is formulated, a connecting structure of a failure potential infection area is changed through the facts that a small amount of nodes with low transmission loads are cut off and short-distance accesses between a high cluster failure transmission subnet and power-load node pairs are reduced, and therefore failures are prevented from accumulating.

Description

technical field [0001] The invention belongs to the electrical field, and relates to a fault suppression method, in particular to a small-world grid cascading fault suppression method. Background technique [0002] The current frequent blackouts have attracted people's attention, and many researchers have analyzed the vulnerability of power networks based on complex network theory. The research results show that most power networks at home and abroad have small-world characteristics. This type of network structure is relatively compact and has high transmission efficiency, but it also has inherent structural vulnerability. When a cascading fault is triggered, the fault will spread in a large area through the long-distance connection in the network in the form of overload. Faults propagate faster and affect a larger area. Therefore, it is an urgent problem to study the suppression strategy of cascading failures for the structural vulnerability of small-world power grids. ...

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Problems solved by technology

The results show that there is redundancy in the connection structure in the high-clustering area. When the fault propagates in this area, the redundancy in the network structure will promote the repeated infection of the fault in the local area, resulting in the accumulation of fault propagation intensity; while the low-clustering There is less redundancy in the connection structure in the area, and the propagation intensity of the fault will not continue to accumulate locally, but it will lead to the expansion of the fault propagation range

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