Extended State Observer-Based Sliding-Mode Control for Three-Phase Power Converters

Abstract

This paper proposes an extended state observer based second order sliding mode (SOSM) control for three-phase two-level grid-connected power converters. The proposed control technique forces the input currents to track the desired values, which can indirectly regulate the output voltage while achieving a user-defined power factor. The presented approach has two control loops. A current control loop based on a SOSM and a dc-link voltage regulation loop which consists of an extended state observer (ESO) plus SOSM. In this work, the load connected to the dc-link capacitor is considered as an external disturbance. An ESO is used to asymptotically reject this external disturbance. Therefore, its design is considered in the control law derivation to achieve high performance. Theoretical analysis is given to show the closed-loop behavior of the proposed controller and experimental results are presented to validate the control algorithm under a real power converter prototype.

PM-Assisted Synchronous Reluctance Machine Flux Weakening Control for EV and HEV Applications

“…Although first order SMC can be considered as an appropriate solution for controlling electric drives connected to switching power converters [34], [35], this technique has the disadvantage of producing a variable switching frequency, which is not usually a desirable feature. Application of second order SMC allows to retain the robustness characteristics of the first order SMC control algorithm at a fixed switching frequency.…”

A probabilistic robust mixed H2/H∞ fuzzy control method for hypersonic vehicles based on reliability theory

“…Under the above settings, we can construct the T-S fuzzy model of HV in equation (6) to apply the proposed method. The premise variables are Mach Number, angle of attack, and flight height.…”

“…Since the state variables of T-S fuzzy model (6) are not selected as premise variables, the equilibrium state x e ¼ ½0; 0; 0; 0 T can be found at the operation point x p .…”

An Enhanced State Observer for DC-Link Voltage Control of Three-Phase AC/DC Converters

“…Recently, several sensor-less based DC-link voltage control strategies have been proposed either to deal with DClink voltage sensor fault or to improve the dynamics of DC-link voltage [8,[16][17][18][19][20]. [17] proposed a Luenberger observer-based DC-link voltage controller, which improved system reliability if DC link voltage sensor fault occurred.…”

“…This observer offers good performance; however, its analysis and tuning are a bit complicated. In [19] …”