A Distributed Security Feature Selection Method Based on Power Grid Operation Data

A technology for power grid operation and safety features, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as decreased algorithm stability, storage or calculation problems, and reduced algorithm accuracy

Active Publication Date: 2017-08-11
TSINGHUA UNIV
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Problems solved by technology

The traditional feature selection algorithm no longer adapts to new requirements, and there will be a "dimensional disaster" problem in the big data environment: First, it is easy to cause the accuracy of the algorithm to decrease, the calculation time to increase significantly, and the stability of the algorithm to decrease, etc.
Second, there are problems with both storage and computing for a single computing node

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  • A Distributed Security Feature Selection Method Based on Power Grid Operation Data
  • A Distributed Security Feature Selection Method Based on Power Grid Operation Data
  • A Distributed Security Feature Selection Method Based on Power Grid Operation Data

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Embodiment Construction

[0015] The distributed security feature selection method based on power grid operation data proposed by the present invention includes the following steps:

[0016] 1) Establish the power flow feature set INP according to the power grid operation data: the power flow feature set INP is the power flow characteristic quantity inp that describes the power grid operation status s A set composed of formula (1), s is the subscript of the grid power flow feature subset, s=1, 2,..., n, determined by the number of grid power flow feature quantities:

[0017] INP=(inp 1 ,...,inp n ) (1)

[0018] where n is the dimension of the grid power flow feature set INP (n is determined by the scale of grid nodes, the more grid nodes, the larger n), inp s Including generator voltage, generator output and node voltage, three types of grid power flow characteristic quantities. Each grid power flow characteristic quantity inp s is an m-dimensional vector, which describes the power flow characteri...

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Abstract

The present invention relates to a distributed safety characteristic selection method based on power grid operation data, and belongs to the power grid safety operation technology field. The method comprises the steps of establishing a power grid power flow characteristic set INP according to the power grid operation data; for the established power grid power flow characteristic set INP, obtaining the correlation among the power grid power flow characteristics, and then obtaining the correlation degrees among the power grid power flow characteristic subsets, and merging the power grid power flow characteristic subset having the maximum correlation degree to finish the correlation grouping based on the power grid power flow characteristics; at different calculation nodes, carrying out the conventional characteristic selection on each power grid power flow characteristic subset INPi in a distributed manner, and integrating the calculation node results at coordination nodes to finish the distributed safety characteristic selection. According to the present invention, the dimensions of the power grid power flow characteristic set are reduced substantially, so that the curse of dimensionality problem in a conventional characteristic selection algorithm is solved to a large extent, and the calculation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of power grid safe operation, and in particular relates to a distributed security feature selection method based on power grid operation data. Background technique [0002] With the rapid development of AC and DC power grids and the continuous access of renewable energy, the time-varying and complex operation modes of large power grids are increasing, and the characteristics and laws of its safe operation are becoming more and more difficult to grasp, which greatly increases the risk of power grid operation. and control difficulty. In recent years, a series of power grid safety operation accidents at home and abroad have shown that: power grid operators must rely on power grid security and stability analysis technology, fully grasp the characteristics and laws of power grid safety operation, and quickly and accurately clarify the weak points of the power grid in order to avoid power grid operation accidents ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/06
Inventor 孙宏斌郭庆来张伯明吴文传黄天恩赵峰
Owner TSINGHUA UNIV
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