An adaptive dual-loop Lyapunov-based control scheme for a single-phase ups inverter

• Main Authors: He, Jinsong, Chan, Chok You, Zhang, Xin, Li, Zhan, Liu, Zhangjie
• Other Authors: School of Electrical and Electronic Engineering
• Format: Article
• Language: English
• Published: 2022
• Subjects: Engineering::Electrical and electronic engineering; Large-Signal Stability; Lyapunov
• Online Access: https://hdl.handle.net/10356/160918
• Institution: Nanyang Technological University

This letter proposes an adaptive Lyapunov-based control strategy for a single-phase uninterruptible power supply inverter with inherent dual control loops. The control law is derived via a proposed Lyapunov function which takes both dual-loop requirements and the global large-signal stability demand into account. Besides, in the proposed control scheme, the load disturbance is suppressed adaptively without any additional load-current sensors or observers. The load voltage is regulated with better steady-state and dynamic performance, as well as with great robustness against the parametric variations. Finally, experimental results verify the effectiveness of the proposed control scheme.