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

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
JournalMechanical Systems and Signal Processing
Volume139
Early online date16 Jan 2020
DOIs
Publication statusE-pub ahead of print - 16 Jan 2020

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Voltage control
Electric potential
Loads (forces)
Torque
Oil fields
Energy conservation
Energy utilization
Oils

Keywords

  • dynamics
  • frequency and voltage control
  • energy saving
  • pumping system
  • electro-mechanical model

Cite this

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title = "Dynamics and frequency and voltage control of downhole oil pumping system",
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.",
keywords = "dynamics, frequency and voltage control, energy saving, pumping system, electro-mechanical model",
author = "Weicheng Li and Vahid Vaziri and Aphale, {Sumeet S} and Marian Wiercigroch",
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T1 - Dynamics and frequency and voltage control of downhole oil pumping system

AU - Li, Weicheng

AU - Vaziri, Vahid

AU - Aphale, Sumeet S

AU - Wiercigroch, Marian

PY - 2020/1/16

Y1 - 2020/1/16

N2 - 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.

AB - 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.

KW - dynamics

KW - frequency and voltage control

KW - energy saving

KW - pumping system

KW - electro-mechanical model

U2 - 10.1016/j.ymssp.2019.106562

DO - 10.1016/j.ymssp.2019.106562

M3 - Article

VL - 139

JO - Mechanical Systems and Signal Processing

JF - Mechanical Systems and Signal Processing

SN - 0888-3270

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