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
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[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...
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