Power grid key node identification method, device and system

Abstract

The invention belongs to the field of electric power data processing, and relates to a power grid key node identification method, device and system. The method comprises the following steps: constructing a power grid topological structure with power effectiveness according to effectiveness rules of power node injection power and line transmission power in a power grid; in the power grid topological structure, calculating an average electrical distance and an electrical betweenness center of power nodes, respectively allocating weight vectors, and constructing a criticality evaluation model ofthe nodes; and calculating a power node nuclear value according to the criticality evaluation model, carrying out recursive network decomposition according to an interval to which the power node nuclear value belongs, and taking the power node contained in the last layer of sub-network as an identified key node set. According to a series of rules, rule characteristics of a large-scale power systemare mined, a standard power grid topological structure is constructed, network characteristics and electrical characteristics of the power system are comprehensively considered, a power grid key nodeidentification model based on multiple factors is established, and efficiency and accuracy of key node identification in a complex power grid system are improved.

Description

technical field [0001] The invention belongs to the field of electric power data processing, and relates to an identification method, device and system for a key node of a power grid. Background technique [0002] In recent years, the rapid development of various emerging technologies has brought about a qualitative leap in people's living standards. The power system is an important infrastructure for the development of all science and technology, and has made outstanding contributions to the development of other social networks such as the Internet, communication networks, and transportation networks. With the continuous expansion of grid size and the improvement of component integration, the structural characteristics of the grid have become more and more complex. This increase in complexity has played a significant role in maintaining efficient power transmission. Although the modern power grid has formed a cross-regional large power grid pattern with high voltage levels...

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Problems solved by technology

[0005] In addition, traditional sorting algorithms (such as k_shell algorithm, TOPSIS algorithm, Pagerank algorithm, etc.) have certain limitations in many practical application scenarios. Combined with, for example, the lack of consideration of power transmission, certain improvements to existing technologies are required to more accurately identify critical nodes in the grid system

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