Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 38, Issue 5, Pages 3155-3168Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2023.3266898
Keywords
Active disturbance rejection controller; grid following inverter; grid synchronization; grid voltage disturbance; photovoltaic system
Categories
Ask authors/readers for more resources
This study proposes an ADRC-based control method for PV-GFI systems, which combines a linear extended state observer and a phase-locked loop observer to achieve optimized tracking performance. The controller can address uncertainties, grid voltage variations, and filter resonance, while also being able to adapt to variable grid voltage and frequency deviations.
A PV three-phase grid following inverter (GFI) with LCL filters can reduce current harmonics and deliver active power to the grid. Controlling such higher-order systems is challenging due to system uncertainties, grid voltage variations, and filter resonance. Active disturbance rejection control (ADRC) provides resilience to these uncertainties and a prompt response to disturbances. A linear extended state observer and a phase-locked loop observer are integrated into the ADRC structure to optimize tracking performance. The proposed controller uses a structured inner and outer closed-loop ADRC that takes into account process delays and extended state observer dynamics. The GFI can operate under variable grid voltage frequencies or even deviations in frequency caused by grid failure, and is able to meet these challenges as part of the design process and the synchronization approach. Both simulation and experimental results are given to validate the dual ADRC-based methods for an 8 kW laboratory prototype PV-GFI system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available