Dynamics and frequency and voltage control of downhole oil pumping system

Weicheng Li, Vahid Vaziri, Sumeet S Aphale, Marian Wiercigroch* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The motor load torque of a typical pumping system employed in onshore oil-fields has a fluctuating ‘double-hump’ profile, which requires a motor with a substantially higher rating than the average load torque. In this paper, we have developed a dynamical model of this electro-mechanical system. To reduce the load fluctuation and consequently lower the required motor rating and energy consumption, a real-time voltage and frequency optimization scheme (RTVFOS) is proposed. Both real-time frequency optimization scheme (RTFOS) applying constant voltage and frequency ratio principle as well as real-time voltage regulation scheme (RTVRS) with constant frequency are also simulated. It is shown that the RTFOS is capable of substantively decreasing the motor rating while the RTVRS is capable of delivering a significant energy savings. It is demonstrated that the RTVFOS combines the benefits of both control methods and also lowers the range of variation in voltage, thereby improving the motor’s operating life.

Original languageEnglish
Article number106562
JournalMechanical Systems and Signal Processing
Volume139
Early online date16 Jan 2020
DOIs
Publication statusPublished - May 2020

Keywords

  • dynamics
  • frequency and voltage control
  • energy saving
  • pumping system
  • electro-mechanical model
  • Frequency and voltage control
  • Pumping system
  • Dynamics
  • Electro-mechanical model
  • Energy saving
  • ENERGY
  • LOAD
  • IMPLEMENTATION
  • STATE
  • MODEL
  • SIMULATION
  • LOSS MINIMIZATION
  • INDUCTION-MOTOR
  • TECHNOLOGY
  • UNITS

ASJC Scopus subject areas

  • Mechanical Engineering
  • Aerospace Engineering
  • Signal Processing
  • Control and Systems Engineering
  • Computer Science Applications
  • Civil and Structural Engineering

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