Nonlinear Passivity-Based Dual-Loop Voltage Control with Reduced Sensor Requirement for Three-Phase Voltage Source Inverters
Year: 2026
Type: conference-paper
Abstract: In distributed energy applications, three-phase voltage source inverters are required to maintain high-quality voltage output under nonlinear loads and significant filter parameter uncertainties. Conventional passive dual-loop controllers rely on output current sensing and exhibit limited harmonic compensation capability when filter parameters deviate. This paper proposes a nonlinear passivity-based dual-loop controller that simultaneously enhances harmonic voltage compensation and reduces sensing requirements. By replacing output current feedback with filter inductor current feedback, the controller eliminates additional current sensors while preserving passivity-based robustness. A nonlinear current-loop term driven by the absolute voltage error is introduced to improve disturbance rejection and avoid sliding-mode chattering. The closed-loop system is proven to be globally uniformly ultimately bounded under parameter perturbations using input-to-state stability analysis. A systematic parameter tuning method considering control bandwidth and digital delay is provided. Experimental validation on a 10 kW GaN/Si hybrid Active Neutral Point Clamped (ANPC) prototype demonstrates that the controller maintains output voltage Total Harmonic Distortion (THD) below 3.5% under 50% filter parameter reduction and nonlinear rectifier loads. The proposed method provides a cost-effective and robust voltage control solution for renewable energy interfacing converters in future grid and microgrid applications.
Authors: Yansong Jin, Qi Ma, Baolin Liu, Gengru Lu, Yanhao Su, Tong Li
Language: English
Subfield: Control and Systems Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W7166870069