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A Lyapunov Theory-Based SEIG–STATCOM Voltage Regulation Control Strategy

Author

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  • Zeyu Zhang

    (College of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Pingping Gong

    (College of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Ziguang Lu

    (College of Electrical Engineering, Guangxi University, Nanning 530004, China)

Abstract

To improve the voltage regulation of asynchronous generators during load switching, a Lyapunov-based control strategy has been proposed to stabilize the generator’s voltage by connecting a static synchronous compensator. By constructing a Lyapunov function from the mathematical model, the error tracking problem is transformed into a global asymptotic stability problem of the Lyapunov function at the equilibrium point. The outer loop linearizes the direct current (DC) voltage control process, while the inner loop replaces integral terms with differential terms. The proposed Lyapunov method achieves linearized voltage control with a quadratic outer loop structure and the inner loop differential structure exhibits a shorter transient process, outperforming traditional methods. Simulation and experimental tests were then used, where the latter was a down-scale laboratory prototype experiment. Compared to traditional (voltage-oriented control) VOC, the outer loop (Lyapunov-function-based control) LBC reduces the DC voltage transient processes by approximately 9.4 milliseconds, while the inner loop LBC reduces both alternating current (AC) and DC voltage transient processes by approximately 2.6 ms and 8.7 ms, respectively.

Suggested Citation

  • Zeyu Zhang & Pingping Gong & Ziguang Lu, 2024. "A Lyapunov Theory-Based SEIG–STATCOM Voltage Regulation Control Strategy," Energies, MDPI, vol. 17(19), pages 1-16, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:19:p:4992-:d:1493356
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    References listed on IDEAS

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