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An Active Common-Mode Voltage Canceler for PWM Converters in Wind-Turbine Doubly-Fed Induction Generators

Author

Listed:
  • Amr. S. Zalhaf

    (Energy Resources Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Alexandria 21934, Egypt
    Electrical Power and Machines Engineering Department, Tanta University, Gharbeya 31512, Egypt)

  • Mazen Abdel-Salam

    (Electrical Engineering Department, Assiut University, Assiut 71516, Egypt)

  • Mahmoud Ahmed

    (Energy Resources Engineering Department, Egypt-Japan University of Science and Technology (E-JUST), Alexandria 21934, Egypt
    Mechanical Engineering Department, Assiut University, Assiut 71516, Egypt)

Abstract

Wind energy integration in power grids is increasing day by day to reduce the use of fossil fuels, and consequently greenhouse gas emissions. Using the pulse-width modulated (PWM) power converters in wind turbine generators, specifically in doubly-fed induction generators, results in generating a common-mode voltage (CMV). This common-mode voltage causes a flow of common-mode current (CMC) that leaks through the stray capacitances in the generator structure. These currents impose a voltage on the generator bearing which may deteriorate them. In the current work, an active common-mode voltage canceler (ACMVC) is developed to eliminate the CMV produced by a PWM converter. The ACMVC generates a compensating voltage at the converter terminals to eliminate the CMV with a subsequent reduction of the voltage stress on the generator bearing. This compensating voltage has the same amplitude as CMV, but opposite polarity. A simulation of the ACMVC model is performed using the PSCAD/EMTDC (Electromagnetic Transient Design and Control) software package. Results confirm the effectiveness of ACMVC in canceling not only the CMV but the CMC and bearing voltage as well. In addition, the relationship between the rise time of CMV and the peak value of CMC is investigated.

Suggested Citation

  • Amr. S. Zalhaf & Mazen Abdel-Salam & Mahmoud Ahmed, 2019. "An Active Common-Mode Voltage Canceler for PWM Converters in Wind-Turbine Doubly-Fed Induction Generators," Energies, MDPI, vol. 12(4), pages 1-12, February.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:4:p:691-:d:207800
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    References listed on IDEAS

    as
    1. Ruifang Liu & Xin Ma & Xuejiao Ren & Junci Cao & Shuangxia Niu, 2018. "Comparative Analysis of Bearing Current in Wind Turbine Generators," Energies, MDPI, vol. 11(5), pages 1-13, May.
    2. Adabi, M. Ebrahim & Vahedi, Abolfazl, 2013. "A survey of shaft voltage reduction strategies for induction generators in wind energy applications," Renewable Energy, Elsevier, vol. 50(C), pages 177-187.
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    Cited by:

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    2. Usha Sengamalai & T. M. Thamizh Thentral & Palanisamy Ramasamy & Mohit Bajaj & Syed Sabir Hussain Bukhari & Ehab E. Elattar & Ahmed Althobaiti & Salah Kamel, 2022. "Mitigation of Circulating Bearing Current in Induction Motor Drive Using Modified ANN Based MRAS for Traction Application," Mathematics, MDPI, vol. 10(8), pages 1-24, April.

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