A Two-Stage Feature Selection Method for Power System Transient Stability Status Prediction

Transient stability status prediction (TSSP) plays an important role in situational awareness of power system stability. One of the main challenges of TSSP is the high-dimensional input feature analysis. In this paper, a novel two-stage feature selection method is proposed to handle this problem. In...

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Published inEnergies (Basel) Vol. 12; no. 4; p. 689
Main Authors Chen, Zhen, Han, Xiaoyan, Fan, Chengwei, Zheng, Tianwen, Shengwei Mei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 20.02.2019
Subjects
Algorithms
Classification
Dimensional analysis
Dimensional stability
Electric power
Electricity distribution
Entropy
fitness function
Genetic algorithms
Methods
Mutation
Optimization
particle encoding method
Probability
Random numbers
Random variables
Search algorithms
Search methods
Situational awareness
Systems stability
Transfer functions
Transient stability
two-stage feature selection
Velocity
Beijing China
United States > US
China
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Summary:Transient stability status prediction (TSSP) plays an important role in situational awareness of power system stability. One of the main challenges of TSSP is the high-dimensional input feature analysis. In this paper, a novel two-stage feature selection method is proposed to handle this problem. In the first stage, the relevance between features and classes is measured by normalized mutual information (NMI), and the features are ranked based on the NMI values. Then, a predefined number of top-ranked features are selected to form the strongly relevant feature subset, and the remaining features are described as the weakly relevant feature subset, which can be utilized as the prior knowledge for the next stage. In the second stage, the binary particle swarm optimization is adopted as the search algorithm for feature selection, and a new particle encoding method that considers both population diversity and prior knowledge is presented. In addition, taking the imbalanced characteristics of TSSP into consideration, an improved fitness function for TSSP feature selection is proposed. The effectiveness of the proposed method is corroborated on the Northeast Power Coordinating Council (NPCC) 140-bus system.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12040689