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Phase Theoretical Line Loss Calculation and Analysis Based on Clustering Theory
Pages: 367-376
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  Nearest neighbor clusteringphase theoretical line lossfeature vectorsimilarity measure;
Abstract: Automatic acquisition may fail to collect data; what’s more, single section network loss can not depict loss of power grid during a period. In view of the above facts, a method based on clustering theory for phase theoretical line loss calculation and analysis is proposed,which only takes node power injection and parameter variation into account. Firstly, the composition of section network loss is analyzed. Secondly, on the basis of section data, feature vector is extracted. A nuclear feature vector calculation method based on rough set theory is used to deal with the situation of failure acquisition. Weight vector of the clustering center section is calculated to match the feature vector through quantizing the network loss increment caused by node power injection and network parameters variation. Finally, the nearest neighbor clustering is improved to analyse and to obtain the theoretical line loss of any section and any period. The Matlab simulation results demonstrate the effectiveness of the proposed method.
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