Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems
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 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.
Artificial lift Electric Submersible Pump (ESP), Current balancing, Current imbalance, Second-Order Generalized Integrator (SOGI), V/f control Scalar control, Scalar control, Artificial lift, Second-order generalized integrator (SOGI), V/f control, Electric submersible pump (ESP)
Orfanoudakis, Georgios I.
6886cb1b-831c-4e49-8b1e-a542d249937c
Yuratich, Michael A.
f7b84d3a-689b-4879-b2be-bf801b539802
Sharkh, Suleiman M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
March 2024
Orfanoudakis, Georgios I.
6886cb1b-831c-4e49-8b1e-a542d249937c
Yuratich, Michael A.
f7b84d3a-689b-4879-b2be-bf801b539802
Sharkh, Suleiman M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Orfanoudakis, Georgios I., Yuratich, Michael A. and Sharkh, Suleiman M.
(2024)
Current balancing of scalar-controlled induction motors with long imbalanced cables for artificial lift systems.
e-Prime - Advances in Electrical Engineering, Electronics and Energy, 7, [100391].
(doi:10.1016/j.prime.2023.100391).
Abstract
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.
Text
1-s2.0-S2772671123002863-main
- Proof
More information
Accepted/In Press date: 7 December 2023
e-pub ahead of print date: 8 December 2023
Published date: March 2024
Additional Information:
Funding Information:
This work was supported by TSL Technology Ltd , Ropley, UK.
Publisher Copyright:
© 2023 The Author(s)
Keywords:
Artificial lift Electric Submersible Pump (ESP), Current balancing, Current imbalance, Second-Order Generalized Integrator (SOGI), V/f control Scalar control, Scalar control, Artificial lift, Second-order generalized integrator (SOGI), V/f control, Electric submersible pump (ESP)
Identifiers
Local EPrints ID: 485573
URI: http://eprints.soton.ac.uk/id/eprint/485573
ISSN: 2772-6711
PURE UUID: 83ed0a88-c935-43b6-a784-70b647140a5b
Catalogue record
Date deposited: 11 Dec 2023 17:35
Last modified: 18 Mar 2024 02:40
Export record
Altmetrics
Contributors
Author:
Georgios I. Orfanoudakis
Author:
Michael A. Yuratich
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
