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Multivariable Control-Based dq Decoupling in Voltage and Current Control Loops for Enhanced Transient Response and Power Delivery in Microgrids

Author

Listed:
  • Mandarapu Srikanth

    (School of Electronics Engineering, VIT-AP University, Amaravati 522237, Andhra Pradesh, India)

  • Yellapragada Venkata Pavan Kumar

    (School of Electronics Engineering, VIT-AP University, Amaravati 522237, Andhra Pradesh, India)

  • Challa Pradeep Reddy

    (School of Computer Science and Engineering, VIT-AP University, Amaravati 522237, Andhra Pradesh, India)

  • Rammohan Mallipeddi

    (Department of Artificial Intelligence, School of Electronics Engineering, Kyungpook National University, Daegu 37224, Republic of Korea
    Smart Agriculture Innovation Center, Kyungpook National University, Daehak-Ro 80, Daegu 41566, Republic of Korea)

Abstract

Being multivariable in nature, voltage and current control loops have controllers in the forward and cross-coupling paths. Most methods discussed in the literature focus on tuning the controllers in the forward paths to reduce the dq coupling. A modified pole-zero cancellation (MPZC) technique has recently been discussed, which uses the concepts of pole-zero cancellation and particle swarm optimization to effectively tune the forward path controllers. However, given the fixed gains in the cross-coupling paths, it is not possible to realize a superior transient response from this technique. Therefore, to achieve enhanced vector control of VSIs under transient conditions, this paper proposes a hybrid MPZC (HMPZC) method, which incorporates multivariable control along with the MPZC technique for both voltage/current control loops. In the proposed HMPZC method, the MPZC method is used to tune the forward path controllers, and multivariable control-based PI controllers are assigned in the cross-coupling paths of dq-axes loops rather than fixed gains. In this paper, these multivariable control-based PI controllers are designed using direct synthesis method-based internal model control (IMC). From the simulation results, it is verified that the proposed HMPZC method has reduced the coupling between the d- and q-axes loops of the current/voltage, leading to the improved transient response and power delivery capability of VSIs.

Suggested Citation

  • Mandarapu Srikanth & Yellapragada Venkata Pavan Kumar & Challa Pradeep Reddy & Rammohan Mallipeddi, 2024. "Multivariable Control-Based dq Decoupling in Voltage and Current Control Loops for Enhanced Transient Response and Power Delivery in Microgrids," Energies, MDPI, vol. 17(15), pages 1-24, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:15:p:3689-:d:1443625
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    References listed on IDEAS

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    1. Yu, Moduo & Huang, Wentao & Tai, Nengling & Zheng, Xiaodong & Wu, Pan & Chen, Weidong, 2018. "Transient stability mechanism of grid-connected inverter-interfaced distributed generators using droop control strategy," Applied Energy, Elsevier, vol. 210(C), pages 737-747.
    2. Jaime A. Rohten & David N. Dewar & Pericle Zanchetta & Andrea Formentini & Javier A. Muñoz & Carlos R. Baier & José J. Silva, 2021. "Multivariable Deadbeat Control of Power Electronics Converters with Fast Dynamic Response and Fixed Switching Frequency," Energies, MDPI, vol. 14(2), pages 1-16, January.
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