Stability Analysis of Open-Loop V/Hz Controlled Asynchronous Machines and Two Novel Mitigation Strategies for Oscillations Suppression

Lorenzo Carbone; Simone Cosso; Krishneel Kumar; Mario Marchesoni; Massimiliano Passalacqua; Luis Vaccaro

LAPSE:2023.15343

Published Article

LAPSE:2023.15343

Stability Analysis of Open-Loop V/Hz Controlled Asynchronous Machines and Two Novel Mitigation Strategies for Oscillations Suppression

Lorenzo Carbone, Simone Cosso, Krishneel Kumar, Mario Marchesoni, Massimiliano Passalacqua, Luis Vaccaro

March 2, 2023

Abstract
Asynchronous machines are always widely used in most industrial applications due to their reliability, flexibility, and manoeuvrability. To achieve variable speed operations, the quite simple open-loop V/Hz control is largely utilized. Under open-loop V/Hz control, the nonlinear interaction is well known to cause current and torque oscillations while operating at low to medium speeds under light loads. This article presents the stability analysis of induction motors at low−medium frequencies under no-load conditions with the V/Hz control. A system representation in the form of state space is discussed, and the region of instability is plotted against the V/f plane. Two novel and refined methods for the mitigation of oscillations in the region of instability are presented. The two proposed algorithms are finally tested and validated through simulation on an inverter-fed induction motor drive system.

Record ID

LAPSE:2023.15343

Keywords

active damping, eigenvalues, induction motor drive, instability, oscillations, small-signal model, stability analysis, V/Hz control

Subject

Process Control

Suggested Citation

Carbone L, Cosso S, Kumar K, Marchesoni M, Passalacqua M, Vaccaro L. Stability Analysis of Open-Loop V/Hz Controlled Asynchronous Machines and Two Novel Mitigation Strategies for Oscillations Suppression. (2023). LAPSE:2023.15343

Author Affiliations

Carbone L: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy
Cosso S: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy [ORCID]
Kumar K: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy [ORCID]
Marchesoni M: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy [ORCID]
Passalacqua M: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy [ORCID]
Vaccaro L: Department of Electrical, Electronic, Tlc Engineering and Naval Architecture (DITEN), University of Genova, via all’Opera Pia 11a, 16145 Genova, Italy [ORCID]

Journal Name

Energies

Volume

15

Issue

4

First Page

1404

Year

2022

Publication Date

2022-02-15