ЧАСТОТНО-РЕГУЛИРУЕМЫЙ ЭЛЕКТРОПРИВОД ЦЕНТРОБЕЖНЫХ НАСОСНЫХ УСТАНОВОК ДОБЫЧИ НЕФТИ

Translated title of the contribution: Variable speed electric drive of centrifugal pump in oil lifting plants

Tatyana A. Chernysheva, Vasiliy V. Anikin, Igor Chernyshev, Aleksandr Yu Chernyshev

Research output: Contribution to journalArticlepeer-review

Abstract

Relevance of the work is caused by the need to create reliable frequencyCcontrolled variable speed asynchronous induction motor driC ves of centrifugal pumping units for oil lifting. The main aim of the research is to study the frequencyCcontrolled electric drives of centrifugal pumping units for oil lifting that operate at a speed higher than the nominal (rated) one. Methods of the research are based on the use of the automatic control theory and simulation in the MatLab – Simulink software enviC ronment. Results. The authors have made up the block scheme for simulation of a scalar frequency-controlled asynchronous induction motor drive of centrifugal pumping units for oil lifting. The scheme takes into account the main features of the real electric drive. The authors calC culated mechanical characteristics of the electric drive of the pumping unit and determined the accessible ranges for controlling the speC ed of the electric drive of the pump unit based on the allowable power losses in steadyCstate and transient modes. Findings. Despite the fact that the static mechanical characteristic of an electric drive with ac converter frequency of 30 Hz is the minimum possible for oil lifting using submersible pumps, the range of speed control in an asynchronous induction motor drive of a submersible pump must be expanded to D=1:10 for a soft starting of the electric drive. It was found that in order to reduce high torque when starting an asynchronous frequency-controlled induction motor drive the frequency ramp-up rate at the output of the ramp generator should be several tens of seconds even for starting at the minimum operating speed of the electric drive. It was established that the inevitable power overrating of the induction motor for a submersible centrifugal pump, when it is selected as the closest higher one from a series of nominal values, allows the electric drive of the pump with frequency speed control to work without overheating on static characteristics above the nominal (rated) one. It was found that in frequency-controlled asynchronous induction motor drives the increase in the pump electric drive speed as a rule does not exceed 10–12 % of the nominal (rated) one, which allows increasing oil lifting output without upgrading the electric drive equipment.

Translated title of the contributionVariable speed electric drive of centrifugal pump in oil lifting plants
Original languageRussian
Pages (from-to)168-178
Number of pages11
JournalBulletin of the Tomsk Polytechnic University, Geo Assets Engineering
Volume330
Issue number12
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Materials Science (miscellaneous)
  • Fuel Technology
  • Geotechnical Engineering and Engineering Geology
  • Waste Management and Disposal
  • Economic Geology
  • Management, Monitoring, Policy and Law

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