TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Evaluation of voltage dip resistance curve parameters for variable frequency electric drive



Full text article ( in russian )

Year

 
2017

Issue

 
379

Volume

 
1

Pages

 
120-127

Caption

 
Evaluation of voltage dip resistance curve parameters for variable frequency electric drive

Authors

 
Shonin О.B., Novozhilov N.G., Kryltcov S.B.

Keywords

 
variable-frequency electric drive, voltage dip resistance curve, under-voltage protection, voltage dip, DC link, capacitor, Частотно-регулируемый электропривод, кривая устойчивости, защита минимально напряжения, провал напряжения, звено постоянного тока, конденсатор

Summary

 
Object and purpose of research. Analysis of variable-frequency drive operation affected by voltage dip in power grid. Investigation of relationship between specific capacity of DC link capacitor and drive’s power load.
Subject matter and methods. Two methods for estimation of allowable grid power interruption time are considered to plot the curve of drive resistance to voltage dips. The study is performed using mathematical and computer simulation tools.
Main results. It is shown that the active power balance equation solved on the assumption of invariable invertor current consumption provides minimum error within 6 % of the computer simulation data.
Conclusion. The model of electric drive processes at coasting discussed in the paper can be recommended for the drive control system to automatically vary the resistance curve parameters depending on the drive operating mode.

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ISSN (print) 2542-2324 / ISSN (online) 2618-8244

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