Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems

Induction motor current imbalance increases losses, torque ripple and vibrations. Current imbalance is known to appear in artificial lift systems, where motors are driven over long imbalanced cables. Power hardware modifications, namely transposition of cable phases in the wellbore, adjustment of th...

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Main Authors: Georgios I. Orfanoudakis, Michael A. Yuratich, Suleiman M. Sharkh
Format: Article
Language:English
Published: Elsevier 2024-03-01
Series:e-Prime: Advances in Electrical Engineering, Electronics and Energy
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2772671123002863
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author Georgios I. Orfanoudakis
Michael A. Yuratich
Suleiman M. Sharkh
author_facet Georgios I. Orfanoudakis
Michael A. Yuratich
Suleiman M. Sharkh
author_sort Georgios I. Orfanoudakis
collection DOAJ
description Induction motor current imbalance increases losses, torque ripple and vibrations. Current imbalance is known to appear in artificial lift systems, where motors are driven over long imbalanced cables. Power hardware modifications, namely transposition of cable phases in the wellbore, adjustment of the step-up transformer taps, and addition of balancing inductors have so far been proposed to suppress the imbalance. However, these solutions compromise the system's reliability or involve costly additional equipment, which must be customized according to the cable characteristics. This paper proposes a control method for current balancing of induction motors driven by scalar-controlled variable speed drives. In the proposed method, Second-Order Generalized Integrators (SOGIs) are used to extract the negative-sequence component of the motor currents, which is then suppressed by a Synchronous Reference Frame (SRF) current controller. The frequency and angle information required by the SOGIs and the SRF controller are obtained directly from the scalar algorithm, without needing a position sensor or observer, thus offering a novel, simple, robust and computationally effective implementation, which is also independent of the cable characteristics. The paper presents MATLAB/Simulink simulation results to illustrate the method's operating principles and performance in a variety of transient conditions. Experimental results obtained using full-scale equipment are also provided to demonstrate its effectiveness.
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spelling doaj.art-04ab5f21ef37470fbcfb6f6db7fcabe22024-03-20T06:11:41ZengElseviere-Prime: Advances in Electrical Engineering, Electronics and Energy2772-67112024-03-017100391Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systemsGeorgios I. Orfanoudakis0Michael A. Yuratich1Suleiman M. Sharkh2Electrical and Computer Engineering department, Hellenic Mediterranean University (HMU), Heraklion, Crete, 71410, GreeceTSL Technology Ltd, Ropley SO24 0BG, UKMechatronics Research Group, Mechanical Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, SO17 1BJ, UK; Corresponding author.Induction motor current imbalance increases losses, torque ripple and vibrations. Current imbalance is known to appear in artificial lift systems, where motors are driven over long imbalanced cables. Power hardware modifications, namely transposition of cable phases in the wellbore, adjustment of the step-up transformer taps, and addition of balancing inductors have so far been proposed to suppress the imbalance. However, these solutions compromise the system's reliability or involve costly additional equipment, which must be customized according to the cable characteristics. This paper proposes a control method for current balancing of induction motors driven by scalar-controlled variable speed drives. In the proposed method, Second-Order Generalized Integrators (SOGIs) are used to extract the negative-sequence component of the motor currents, which is then suppressed by a Synchronous Reference Frame (SRF) current controller. The frequency and angle information required by the SOGIs and the SRF controller are obtained directly from the scalar algorithm, without needing a position sensor or observer, thus offering a novel, simple, robust and computationally effective implementation, which is also independent of the cable characteristics. The paper presents MATLAB/Simulink simulation results to illustrate the method's operating principles and performance in a variety of transient conditions. Experimental results obtained using full-scale equipment are also provided to demonstrate its effectiveness.http://www.sciencedirect.com/science/article/pii/S2772671123002863Current balancingSecond-order generalized integrator (SOGI)V/f controlScalar controlCurrent imbalanceArtificial lift
spellingShingle Georgios I. Orfanoudakis
Michael A. Yuratich
Suleiman M. Sharkh
Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
e-Prime: Advances in Electrical Engineering, Electronics and Energy
Current balancing
Second-order generalized integrator (SOGI)
V/f control
Scalar control
Current imbalance
Artificial lift
title Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
title_full Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
title_fullStr Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
title_full_unstemmed Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
title_short Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
title_sort current balancing of scalar controlled induction motors with long imbalanced cables for artificial lift systems
topic Current balancing
Second-order generalized integrator (SOGI)
V/f control
Scalar control
Current imbalance
Artificial lift
url http://www.sciencedirect.com/science/article/pii/S2772671123002863
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AT suleimanmsharkh currentbalancingofscalarcontrolledinductionmotorswithlongimbalancedcablesforartificialliftsystems