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Power Quality Comprehensive Evaluation Based on Matter-Element Theory and Evidence Theory
Pages: 383-391
Year: Issue:  12
Journal: Transactions of China Electrotechnical Society

Keyword:  Power qualitymatter-element theoryevidence theorycomprehensive evaluation;
Abstract: In order to solve the uncertainty and subjectivity of power quality comprehensive evaluation, an power quality comprehensive evaluation method is proposed based on matter-element theory and evidence theory in the paper. it use matter-element to establish matter-element model of power quality, it quantifies the subordinate relation of various evaluation indexes and evaluation interval of quality grades by correlation function, and normalizes it to obtain the belief function of each index. Then the weight of each evaluation index of power quality is obtained by using combination weighing method based on entropy weight and G1 method, to modify belef functions of the original evidence. on this basis, using evidence combination rule fuses various evaluation indexes, so as to obtain power quality comprehensive assessment. The calculation of an example shows that the proposed method minimizes the uncertainty in assessment process, can get more.
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