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Enhanced Current Reference Calculation to Avoid Harmonic Active Power Oscillations

Author

Listed:
  • Javier Serrano

    (Department of Electronics, University of Alcalá, Ctra. Madrid-Barcelona km 33, 28805 Alcalá de Henares, Spain)

  • Javier Moriano

    (Altran Spain, Campezo Street, 1, 28022 Madrid, Spain)

  • Mario Rizo

    (Gamesa Electric, Mar Mediterráneo Street, 6, 28830 San Fernando de Henares, Madrid, Spain)

  • Francisco Javier Dongil

    (Department of Electronics, University of Alcalá, Ctra. Madrid-Barcelona km 33, 28805 Alcalá de Henares, Spain)

Abstract

Energy storage systems play a key role in the rise of distributed power generation systems, hence there is great interest in extending their lifetimes, which are directly related to DC current ripple. One of the ripple sources is the low-frequency active power fluctuations under unbalanced and distorted grid voltage conditions. Therefore, this paper addresses a multifrequency control strategy where the harmonic reference currents are calculated to reduce harmonic active power oscillations. The stationary reference frame (StRF) approach taken here improves the precision and computational time of the current reference calculation method. Additionally, in order to ensure safe converter operation when a multifrequency reference current is provided, a computational efficient peak current saturator is applied while avoiding signal distortion every time step. If the injected current harmonic distortion is to be minimized, which is a feature included in this work, the peak current saturator is a necessary requirement. Active power ripple is reduced even with frequency variations in the grid voltage using a well-known frequency-adaptive scheme. The simulation and experimental results prove the optimized performance for the control objective: power ripple reduction with minimum current harmonic distortion.

Suggested Citation

  • Javier Serrano & Javier Moriano & Mario Rizo & Francisco Javier Dongil, 2019. "Enhanced Current Reference Calculation to Avoid Harmonic Active Power Oscillations," Energies, MDPI, vol. 12(21), pages 1-21, October.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:21:p:4075-:d:280336
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    References listed on IDEAS

    as
    1. Weiming Liu & Tingting Zheng & Ziwen Liu & Zhihua Fan & Yilong Kang & Da Wang & Mingming Zhang & Shihong Miao, 2018. "Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions," Energies, MDPI, vol. 11(11), pages 1-19, November.
    2. Rizka Bimarta & Thuy Vi Tran & Kyeong-Hwa Kim, 2018. "Frequency-Adaptive Current Controller Design Based on LQR State Feedback Control for a Grid-Connected Inverter under Distorted Grid," Energies, MDPI, vol. 11(10), pages 1-29, October.
    3. Ana Rodríguez & Emilio J. Bueno & Álvar Mayor & Francisco J. Rodríguez & Aurelio García-Cerrada, 2014. "Voltage Support Provided by STATCOM in Unbalanced Power Systems," Energies, MDPI, vol. 7(2), pages 1-24, February.
    4. Nian-Cheng Zhou & Xiao-Xuan Lou & David Yu & Qiang-Gang Wang & Jia-Jia Wang, 2015. "Harmonic Injection-Based Power Fluctuation Control of Three-Phase PV Systems under Unbalanced Grid Voltage Conditions," Energies, MDPI, vol. 8(2), pages 1-16, February.
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