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http://dx.doi.org/10.9717/kmms.2022.25.10.1448

Research on Model to Diagnose Efficiency Reduction of Inverters using Multilayer Perceptron  

Jeong, Ha-Young (TEF Co., ltd.)
Hong, Seok-Hoon (TEF Co., ltd.)
Jeon, Jae-Sung (TEF Co., ltd.)
Lim, Su-Chang (TEF Co., ltd.)
Kim, Jong-Chan (Dept of Computer Engineering, Sunchon National University)
Park, Chul-Young (TEF Co., ltd.)
Publication Information
Abstract
This paper studies a model to diagnose efficiency reduction of inverter using Multilayer Perceptron(MLP). In this study, two inverter data which started operation at different day was used. A Multilayer Perceptron model was made to predict photovoltaic power data of the latest inverter. As a result of the model's performance test, the Mean Absolute Percentage Error(MAPE) was 4.1034. The verified model was applied to one-year-old and two-year-old data after old inverter starting operation. The predictive power of one-year-old inverter was larger than the observed power by 724.9243 on average. And two-year-old inverter's predictive value was larger than the observed power by 836.4616 on average. The prediction error of two-year-old inverter rose 111.5572 on a year. This error is 0.4% of the total capacity. It was proved that the error is meaningful difference by t-test. The error is predicted value minus actual value. Which means that PV system actually generated less than prediction. Therefore, increasing error is decreasing conversion efficiency of inverter. Finally, conversion efficiency of the inverter decreased by 0.4% over a year using this model.
Keywords
Multilayer Perceptron; Photovoltaic System; Inverter; Efficiency Reduction; Diagnosis;
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Times Cited By KSCI : 3  (Citation Analysis)
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