Design of Damping Strategies for LC Filter Applied in Medium Voltage Variable Speed Drive

Diuary Gonçalves, João Victor Matos Farias, Heverton Augusto Pereira, Alex-Sander Amável Luiz, Marcelo Martins Stopa and Allan Fagner Cupertino
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Diuary Gonçalves: Department of Electrical Engineering, Federal Center for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil
João Victor Matos Farias: Department of Electronic Energy Systems, Fraunhofer Institute for Silicon Technology, 25524 Itzehoe, Germany
Heverton Augusto Pereira: Department of Electrical Engineering, Federal University of Viçosa, Viçosa 36570-900, MG, Brazil
Alex-Sander Amável Luiz: Department of Electrical Engineering, Federal Center for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil
Marcelo Martins Stopa: Department of Electrical Engineering, Federal Center for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil
Allan Fagner Cupertino: Department of Electrical Engineering, Federal Center for Technological Education of Minas Gerais, Belo Horizonte 30421-169, MG, Brazil

Energies, 2022, vol. 15, issue 15, 1-18

Abstract: In recent years, medium-voltage variable-speed drives have become popular in the industry. However, in some applications, the use of long cables can lead to overvoltages at the motor terminals, affecting the motor lifespan. Under such conditions, the use of passive filters is recommended. However, the use of inductive capacitive (LC) filters results in resonances, leading to control stability issues. This issue can be mitigated by introducing a resonance damping strategy. In this work, four damping strategies are implemented and designed: Passive damping, capacitor current feedback, capacitor voltage feedback, and notch filter-based damping. The paper performs a comparative study on the current control phase margin, current and voltage harmonic spectra, and overall changes in the control structure. Then, the effect of the damping strategy on the VSD control is evaluated, creating guidelines to support the selection of the appropriate damping strategy. The results indicate that capacitor voltage feedback stands out, since this strategy presents an interesting dynamic behavior while allowing the elimination of the passive damping losses at a relatively low cost.

Keywords: LC filter; resonance damping; induction machine drives (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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