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An identification method of key nodes in power system

A power system and key node technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as power grid instability, collapse, and grid cascading failures, and achieve the effect of preventing critical state evolution and improving practical value

Active Publication Date: 2021-01-08
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The failure of key nodes can easily lead to cascading failures in the power grid, which in turn can lead to instability and collapse of the power grid

Method used

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  • An identification method of key nodes in power system
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  • An identification method of key nodes in power system

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Embodiment Construction

[0030] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] In this embodiment, the IEEE39 node system is taken as an example to perform correctness and validity check calculation based on PSNodeRank key node ranking.

[0032] Such as figure 1 As shown, a method for identifying key nodes of a power system provided by the present invention includes the following steps:

[0033] (1) Obtain the topology information of the power grid, and input the parameter information of the system to be calculated.

[0034] Input the mode data...

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Abstract

The invention discloses an identification method for a key node of a power system, and relates to the technical field of data processing and application of the power system. According to the identification method for the key node of the power system, the whole power grid is partitioned, a Local PSNodeRank vector of each partition region and a Block PSNodeRank vector of the whole power grid are solved, the key node in a power system network is detected according to a sequence of a PSNodeRank value, and the situation that actual transmission capability of a power transmission line is not considered or a topological structure of the power system is only considered by a traditional identification method is prevented. The importance of a certain node in the power grid can be quantitatively expressed according to change of a node fault or power transmission capability of the power grid after running exits and change of an electrical topological structure among the nodes, so that a more accurate identification method for the key node of a modern power grid is built, a weak link of power grid running is found out, and the system is prevented from evolving towards a cascading fault criticalstate.

Description

technical field [0001] The invention belongs to the technical field of power system data processing and application, and in particular relates to a method for identifying key nodes of a power system. Background technique [0002] With the increasing scale of the power system, my country's power grid has gradually become a complex large power grid with AC and DC hybrid operation, and the complexity of its shape has also increased. The parallel operation of AC and DC, complex structure and increasingly close connection make the safe and stable operation of the power grid more complicated. In recent years, there have been frequent blackouts at home and abroad, which have seriously affected people's lives and the economy. The study found that the power system blackout accidents have extremely important connections with some key nodes of the power grid, and these key nodes play a very important role in the safe and stable operation of the power system. The failure of key nodes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 孙志媛孙艳梁水莹刘默斯李凌刘光时李明珀文立斌邓秋荃熊莉
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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