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Disruption to the transfomator can result in losses that disrupt the flow of electricity to
consumers. Harmonics are disturbances that arise due to the operation of non-linear
loads. The purpose of this study is to analyze the efficiency of the KA4214 transformer
at the Udayana Bukit Jimbaran Engineering Faculty with harmonics, namely the R =
16.9%, S = 13.8% and, T = 16.1%. . The method used is to simulate and analyze with
the results of harmonic measurements in existing conditions, active filters, and active
filters based on fuzzy logic controller using Matlab software. The optimal results
obtained are using the fuzzy logic controller method with the results of R = 0.85% S =
0.65% T = 0.39% and the efficiency results are 99.99%.
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