Power system operation mode data feature two-stage selection method

An operation mode and power system technology, applied in character and pattern recognition, instruments, computer components, etc., can solve the problems of increased uncertainty on both sides of the source and load, complex characteristics of the power grid, etc., and achieve easy implementation, accurate automatic search Effect

CN112396113APending Publication Date: 2021-02-23国家电网公司东北分部 +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-23

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Abstract

The invention belongs to the technical field of power system operation and control, and relates to a power system operation mode data feature two-stage selection method. Firstly, a Filter stage algorithm is selected through IG-RFE features based on standardized mutual information and interactive information gain, prior parameters in related algorithms are removed, the complex dependence relation between the features is correctly judged, and therefore automatic search and extraction of key features of power system operation mode data are achieved; and then bad features are removed through cooperation of an improved hybrid kernel function SVM algorithm and a recursive feature elimination RFE search method until a feature set of which the result number is a preset value is obtained, so that efficient, accurate and automatic search of the key features of the power system is realized. According to the method, the efficiency and accuracy of data feature selection of the power system operation mode are improved, and a technical basis and a practical method are provided for data feature selection of the power grid operation mode.
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Description

technical field

[0001] The invention belongs to the technical field of power system operation and control, and relates to a two-stage selection method for data characteristics of a power system operation mode. Background technique

[0002] The scale of my country's UHV AC-DC hybrid power grid continues to expand, the extensive access of new energy sources and the increase in the degree of two-way interaction between flexible loads and the grid have increased the uncertainty of both sides of the source and load, and the characteristics of the grid have become increasingly complex. The operator monitors and regulates the safe and stable operation of the power grid, which poses a huge challenge. Therefore, it is of great significance to maintain the safe and stable operation of the power system to study the potential security and stability problems of the power grid, improve the observability and controllability of the power system, and realize the efficient and rapid assessment...

Examples

Embodiment Construction

[0047] The two-stage selection method for data characteristics of the power system operation mode proposed by the present invention includes the following steps:

[0048] (1) Perform filter phase feature selection based on standardized mutual information and mutual information gain for the power system operation mode data, including the following steps:

[0049] (1-1) Obtain the power system operation mode data from the synchronous vector measurement unit of the power system, supplement the missing data in the data, delete the duplicate data, obtain valid data, and construct a set of operation data for each group According to the characteristics of the sample and the sample, label the sample with 0 or 1 according to whether it is transiently stable or not, and record it as the category attribute C of the sample;

[0050] (1-2) Construct a selected feature subset S, initialize S as an empty set; construct a candidate feature set US, initialize it as an empty set; respectively c...