The impact of load, comprising asynchronous motors, on the negative-sequence currents in the generator circuit in unbalanced conditions

R. A. Vainshtein, N. V. Kolomiets, V. V. Shestakova

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper dwells on calculation method for the negative-sequence currents in the generator circuit in unbalanced conditions. The method considers shunting effect of the load, comprising asynchronous motors. It is based on a software complex for calculating electromechanical transients, designed on the basis of the single-phase network positive-sequence diagram and supplemented with straight-line negative and zero-sequence diagrams. During the electromechanical transient, diagrams of various sequences switch a circuit according to the type and point of fault. This method takes into account variation of the symmetrical periodic component, caused by sub-transient short-circuit current, the effect of automatic excitation control and change in the polar wheel angle during electromechanical transients. Calculations have shown that the load, comprising asynchronous motors, leads to decreasing negative-sequence currents in the generator circuit with various connection diagrams up to 17%. Accounting for the impact of motors allows us to specify calculations of tripping set points and sensitivity study of generator protection against the negative-sequence currents.

Original languageEnglish
Title of host publication2016 2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781509013227
DOIs
Publication statusPublished - 2016
Event2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016 - Chelyabinsk, Russian Federation
Duration: 19 May 201620 May 2016

Publication series

Name2016 2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016 - Proceedings

Conference

Conference2nd International Conference on Industrial Engineering, Applications and Manufacturing, ICIEAM 2016
CountryRussian Federation
CityChelyabinsk
Period19.5.1620.5.16

Keywords

  • asynchronous motor
  • negative-sequence current
  • negative-sequence protection
  • synchronous generator

ASJC Scopus subject areas

  • Modelling and Simulation
  • Industrial and Manufacturing Engineering
  • Control and Optimization

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