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

Zeyu Zhang, Pingping Gong () and Ziguang Lu
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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

Energies, 2024, vol. 17, issue 19, 1-16

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.

Keywords: Lyapunov-based control; self-excited induction generator; static synchronous compensator; voltage regulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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