Supporting unbalanced grids with induction machine drives by inverters without intermittent energy storage

Author

Krischan, Klaus ; Seebacher, Roland ; Muetze, Annette

Author_Institution

Graz Univ. of Technol., Graz, Austria

fYear

2011

fDate

Aug. 30 2011-Sept. 1 2011

Firstpage

1

Lastpage

10

Abstract

A method for supporting unbalanced grids by utilizing a drive system with induction machine and inverter with no or low intermittent energy storage is proposed. Even though the instantaneous power, that is drawn from the mains is oscillating, the torque and speed of the machine are maintained constant. A strategy for obtaining the time dependent reference values for the flux linkage and the torque building current of a rotor field oriented control of an induction machine is presented. Some necessary enhancements to the control algorithm are discussed. Simulation results show the feasibility of the proposed method and control schemes. Measurement results from a practical implementation are given. A discussion of additional losses inherent to the proposed method and control schemes concludes the paper.

Keywords

induction motor drives; invertors; machine vector control; power grids; power supply quality; rotors; torque control; flux linkage; induction machine drives; instantaneous power; inverters; losses; machine speed; machine torque; rotor field oriented control; time dependent reference value; torque building current; unbalanced grids; Buildings; Couplings; Differential equations; Rotors; Stator windings; Torque; Control of drive; Distributed power; Induction motor; Power quality; Three-phase system;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on

Conference_Location

Birmingham

Print_ISBN

978-1-61284-167-0

Electronic_ISBN

978-90-75815-15-3

Type

conf

Filename

6020525