Disturbance-Observer-Based DC-Bus Voltage Control for Ripple Mitigation and Improved Dynamic Response in Two-Stage Single-Phase Inverter System

Modeling and Advanced Control of Dual-Active-Bridge DC–DC Converters: A Review

“…Disturbances and uncertainties exist in all power converter control systems [49]. These disturbances and uncertainties include input voltage and load variation, model uncertainty, and circuit parameter variations due to temperature or aging effects [50]. Disturbance-observer-based control (DOBC) employs an observer to estimate the total disturbances and uncertainties, and corresponding compensation is then generated by making use of the estimate [49].…”

Observer-Based Robustness Improvement for FCS-MPCC Used in IMs

“…Comparatively, the disturbance observers are able to detect not only the general disturbances caused by parameter mismatch but also the system nonlinearities and even external disturbances, so it is attracting more attentions at present. Paper [8] proposes a disturbance observer based on feedback compensation to solve the inductance and bus voltage variation problem. [9,10] use sliding mode observers (SMO) that have the advantages of robustness against disturbances, low sensitivity to the system parameter variations and fast response to solve the parameter mismatch and uncertainty problems, laying the ground for the SMO based disturbance computation and compensation techniques.…”

Finite-time disturbance observer–based funnel voltage control strategy for vehicle-to-grid inverter in islanded mode

“…The principle of disturbance observer is to reconstruct the disturbance signal through the external variables of the system and introduce equivalent compensation into the controller to suppress the disturbance signal. In Ali et al, 25 the disturbance observer is applied to a single-phase inverter to reduce the doubleline frequency ripple on the direct current (DC)-bus voltage. In Wang et al, 26 parameter uncertainties, nonmodeled dynamics of the permanent magnet synchronous motor system are estimated by a disturbance observer and achieve the high-precision tracking performance.…”