Enhancing Power Quality in Industry 4.0 Manufacturing Using the Multi-Criteria Selection Method

Abstract

Industry 4.0 technology is growing rapidly in the manufacturing industry and other businesses. Devices used in Industry 4.0 are manufactured with high frequency switching functions and generate harmonics that negatively affect power quality. Choosing the direct or parallel connection method of the harmonic current absorber depends on the specific requirements of the system and the goal of improving power quality. Shunt Active Power Filter (SAPF) is the best device currently used to improve power quality. This study proposes to use the fuzzy-rough MARCOS method to make decisions on SAPF selection based on experts' opinions to improve the quality of power sources at the source of smart manufacturing plants using Industry 4.0 devices. This study implements two decision-making methods in Multi-Criteria Decision-Making (MCDM). The first is the SWARA method (Stepwise Weight Assessment Ratio Analysis), and the second is the MARCOS method (Measurement Alternatives and Ranking According to Compromise Solution). The fuzzy-rough method is used to incorporate uncertain information into the results of decisionmaking and to use linguistic values. The analysis results of the fuzzy-rough SWARA method show that the price factor and power filter range have the greatest influence on the choice of SAPF for harmonic mitigation. Analysis results from the fuzzy-rough MARCOS method show that manufacturer Schneider Electric has the best features according to the evaluation results from decision makers. Sensitivity analysis methods were used to confirm the findings. The harmonic value THDi displayed in the field after installing the harmonic filter is, respectively, THDi1 = 5%, THDi2 = 6%, and THDi3 = 5%, it meets the regulations of Circular 30/2019/TT-BCT. According to this circular, the requirement for total harmonic value (THDi) is below 12%. With THDi1, THDi2, and THDi3 values all below 12%. In operating electrical systems in production and business environments, using SAPF filters for harmonic mitigation helps improve power quality. The fuzzyrough method is applied, and the decision maker's decisions are used to adjust the intention to use the SAPF set to suit the conditions. INDEX TERMSShunt Active Power Filter, fuzzy-rough MARCOS, Harmonic Mitigation, Power Quality I. INTRODUCTION As Industry 4.0 technology continues to develop, switching devices are also growing exponentially to meet the development of Industry 4.0 technology [1]. Switching devices generate noise signals, called harmonic currents. Harmonic currents arising in the power source cause complex effects and cause the quality of the power source to deteriorate. Devices that use electricity have poor power quality due to harmonic currents, making the device's operation unstable, possibly exploding, and unstable performance [2]. The development of Industry 4.0 technology is not only in the manufacturing industry, but Industry 4.0 technology is developing and penetrating all industries, Electrical equipment in industries that use Industry 4.0 technology is affected by harmo...