首页|Optimal Operation Strategy Analysis with Scenario Generation Method Based on Principal Component Analysis,Density Canopy,and K-medoids for Integrated Energy Systems
Optimal Operation Strategy Analysis with Scenario Generation Method Based on Principal Component Analysis,Density Canopy,and K-medoids for Integrated Energy Systems
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The operation of integrated energy systems(IESs)is confronted with great challenges for increasing penetration rate of renewable energy and growing complexity of energy forms.Scenario generation is one of ordinary methods to allevi-ate the system uncertainties by extracting several typical scenar-ios to represent the original high-dimensional data.This paper proposes a novel representative scenario generation method based on the feature extraction of panel data.The original high-dimensional data are represented by an aggregated indicator matrix using principal component analysis to preserve temporal variation.Then,the aggregated indicator matrix is clustered by an algorithm combining density canopy and K-medoids.Togeth-er with the proposed scenario generation method,an optimal operation model of IES is established,where the objective is to minimize the annual operation costs considering carbon trading cost.Finally,case studies based on the data of Aachen,Germa-ny in 2019 are performed.The results indicate that the adjust-ed rand index(ARI)and silhouette coef'ficient(SC)of the pro-posed method are 0.6153 and 0.6770,respectively,both higher than the traditional methods,namely K-medoids,K-means++,and density-based spatial clustering of applications with noise(DBSCAN),which means the proposed method has better accu-racy.The error between optimal operation results of the IES ob-tained by the proposed method and all-year time series bench-mark value is 0.1％,while the calculation time is reduced from 11029 s to 188 s,which verifies that the proposed method can be used to optimize operation strategy of IES with high efficien-cy without loss of accuracy.
Scenario generationprincipal component analy-sis(PCA)density canopyK-medoidsintegrated energy system
Bingtuan Gao、Yunyu Zhu、Yuanmei Li
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School of Electri-cal Engineering,Southeast University,Nanjing,China
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