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Coordinated Excitation and Static Var Compensator Control with Delayed Feedback Measurements in SGIB Power Systems

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  • Haris E. Psillakis

    (School of Electrical and Computer Engineering, National Technical University of Athens, 15780 Athens, Greece)

  • Antonio T. Alexandridis

    (Department of Electrical and Computer Engineering, University of Patras, 26504 Patras, Greece)

Abstract

In this paper, we present a nonlinear coordinated excitation and static var compensator (SVC) control for regulating the output voltage and improving the transient stability of a synchronous generator infinite bus (SGIB) power system. In the first stage, advanced nonlinear methods are applied to regulate the SVC susceptance in a manner that can potentially improve the overall transient performance and stability. However, as distant from the generator measurements are needed, time delays are expected in the control loop. This fact substantially complicates the whole design. Therefore, a novel design is proposed that uses backstepping methodologies and feedback linearization techniques suitably modified to take into account the delayed measurement feedback laws in order to implement both the excitation voltage and the SVC compensator input. A detailed and rigorous Lyapunov stability analysis reveals that if the time delays do not exceed some specific limits, then all closed-loop signals remain bounded and the frequency deviations are effectively regulated to approach zero. Applying this control scheme, output voltage changes occur after the large power angle deviations have been eliminated. The scheme is thus completed, in a second stage, by a soft-switching mechanism employed on a classical proportional integral (PI) PI voltage controller acting on the excitation loop when the frequency deviations tend to zero in order to smoothly recover the output voltage level at its nominal value. Detailed simulation studies verify the effectiveness of the proposed design approach.

Suggested Citation

  • Haris E. Psillakis & Antonio T. Alexandridis, 2020. "Coordinated Excitation and Static Var Compensator Control with Delayed Feedback Measurements in SGIB Power Systems," Energies, MDPI, vol. 13(9), pages 1-18, May.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:9:p:2181-:d:353026
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    References listed on IDEAS

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    1. Ziquan Liu & Wei Yao & Jinyu Wen, 2017. "Enhancement of Power System Stability Using a Novel Power System Stabilizer with Large Critical Gain," Energies, MDPI, vol. 10(4), pages 1-15, April.
    2. Panos Kotsampopoulos & Pavlos Georgilakis & Dimitris T. Lagos & Vasilis Kleftakis & Nikos Hatziargyriou, 2019. "FACTS Providing Grid Services: Applications and Testing," Energies, MDPI, vol. 12(13), pages 1-23, July.
    3. Huabo Shi & Xinwei Sun & Gang Chen & Hua Zhang & Yonghong Tang & Lin Xu & Lijie Ding & Chengwei Fan & Yin Xu, 2019. "Optimization Strategy of SVC for Eliminating Electromagnetic Oscillation in Weak Networking Power Systems," Energies, MDPI, vol. 12(18), pages 1-16, September.
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    Cited by:

    1. Chaochun Yu & Liang Qi & Jie Sun & Chunhui Jiang & Jun Su & Wentao Shu, 2022. "Fault Diagnosis Technology for Ship Electrical Power System," Energies, MDPI, vol. 15(4), pages 1-16, February.

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