Condition assessment of power transformers using a synthetic analysis method based on association rule and variable weight coefficients

Fuzzy Evaluation Algorithm of Distribution Transformer Based on Adaptive Variable Weight

“…In order to better illustrate the problem, we toke the literature [8] as an example, the results of this paper are compared with the results of literature [8].…”

“…Project Layer Traditional method [8] Proposed method Table 6. Finally, we can change the weight of the project layer.…”

“…However, some algorithms took the weight as a constant quantity, which is called constant weight method. Constant weight methods include the association rule [8] , the entropy-weighting method [9] and analytic hierarchy process [10] . Among them, AHP is a simple and effective method to make analysis and comprehensive evaluation on complex problems that is multiple criteria, multi-factor and multi-level.…”

“…Reference [11] proposed a typical punishment variable weight function of transformer condition assessment, yet this method couldn't reflect the difference among importance of indexes. A balance function was put forward by reference [8], but it couldn't distinguish the importance of indexes, especially when an index deviates from the normal value, that is to say, the degradation degree of important indexes of evaluation will be close to zero, the balance function value will tend to be infinity. The balance function in reference [8] can transform the weight well when important indexes degrade, but as unimportant index degrades, the corresponding weight coefficients value will be much larger than it should be.…”

Anomaly detection of online monitoring data of power equipment based on association rules and clustering algorithm

“…Also, data cleaning is becoming more and more important in the analysis and prediction of the power system's operating state [8]. In [9], center clustering method is used to detect and characterize the anomaly data in time series.…”