Robust gain-scheduled feedforward compensator with quasi-LPV model for buck converters in abrupt input voltage disturbances
Küçük Resim Yok
Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
International Society of Automation
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper presents a robust control strategy for DC-DC Buck converters operating under sudden input voltage disturbances. A novel quasi-Linear Parameter Varying (LPV) model is constructed by incorporating parasitic elements and expressing system dynamics as functions of the duty cycle to capture real-world dynamics more accurately. Based on this model, a gain-scheduled LPV feedforward compensator is synthesized using affine parameter-dependent Linear Matrix Inequalities (LMIs) to achieve H<inf>∞</inf> disturbance attenuation performance. The proposed feedforward compensator adapts continuously to duty cycle variations using only input voltage measurement, thereby simplifying implementation without compromising control performance. This feedforward structure is integrated with a generic feedback controller, enhancing the system's ability to reject abrupt input disturbances effectively. Experimental results demonstrate superior performance. Compared to a conventional PI controller, our proposed method achieves a 22.46 % higher Disturbance Rejection Ratio (DRR), 65 times higher Attenuation Ratio (AR), 83.49 dB higher Power Supply Rejection Ratio (PSRR), and an impressive 98.46 % reduction in output voltage ripple (from 38.235 % to just 0.588 %). Furthermore, it allows only 0.35 % of the disturbance to pass to the output (Disturbance Transmission Gain - DTG). Comparative analysis confirms this approach outperforms other state-of-the-art methods across all disturbance rejection metrics, delivering significantly higher AR and PSRR, and substantially lower voltage ripple. Our controller maintains a 99.65 % DRR even under a challenging 146.15 % input voltage disturbance, highlighting that it exhibits superior robustness. This makes it highly applicable for demanding power electronics systems in areas like renewable energy, electric vehicles, and industrial power converters. © 2025 Elsevier B.V., All rights reserved.
Açıklama
Anahtar Kelimeler
Buck Converter, Disturbance Rejection, Feedforward, Gain-scheduling, Quasi-lpv, Sudden Voltage Disturbances, Buck Converter, Controllers, Electric Inverters, Electric Machine Control, Electric Power Systems, Linear Matrix Inequalities, Nonlinear Control Systems, Robust Control, Robustness (control Systems), Buck Converters, Feed Forward, Feed-forward Compensator, Gain Scheduling, Input Voltage Disturbances, Linear Parameter Varying, Quasi-linear, Quasi-linear Parameter Varying, Sudden Voltage Disturbance, Voltage Disturbances, Disturbance Rejection
Kaynak
ISA Transactions
WoS Q Değeri
Scopus Q Değeri
Q1
