Improved Method for Determining Voltage Unbalance Factor Using Induction Motors

Luis Guasch-Pesquer (), Sara García-Ríos, Adolfo Andres Jaramillo-Matta and Enric Vidal-Idiarte
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Luis Guasch-Pesquer: Department of Electronic, Electric and Automatic Engineering, Universitat Rovira i Virgili, Països Catalans, 26, 43007 Tarragona, Spain
Sara García-Ríos: IDNEO Technologies, S.A.U. Carrer Rec de Dalt 3, 08100 Mollet del Vallès, Spain
Adolfo Andres Jaramillo-Matta: Facultad de Ingeniería, Universidad Distrital Francisco José de Caldas, Carrera 7 # 40B–53, Bogotá 111711, Colombia
Enric Vidal-Idiarte: Department of Electronic, Electric and Automatic Engineering, Universitat Rovira i Virgili, Països Catalans, 26, 43007 Tarragona, Spain

Energies, 2022, vol. 15, issue 23, 1-13

Abstract: This work shows an alternative method to determine the Voltage Unbalance Factor in a power grid by using both the mean value of the line voltages and Current Unbalance Factor in induction motors. Twenty unbalanced voltage points on three induction motors were used in order to compare the two methods. The influence of the measurement error of both the voltmeters and the ammeters on the resulting Voltage Unbalance Factor was studied, and the validation was made with laboratory data for one of the three motors analyzed, in addition to the simulations carried out. The proposed Voltage Unbalance Factor was compared with the most typical method in the standards to obtain this factor, showing that the proposed factor has a better approach than the standard factor to determine the value of the Voltage Unbalance Factor in an unbalanced power system.

Keywords: current measurement; induction motors; power quality; torque measurement; voltage fluctuations (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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