Robust Band-Pass Filter-Based PLL-Less Approach for Three-Phase Nonsinusoidal Grid Conditions

Robust Band-Pass Filter-Based PLL-Less Approach for Three-Phase Nonsinusoidal Grid Conditions

The performance enhancement of an inverter-based grid-connected system necessitates a fast and accurate dynamic response in terms of estimating three-phase grid voltage attributes. The synchronous reference frame phase-locked loop (PLL) and/or the frequency-locking (i.e., frequency-locked loop) appr...

Full description

Saved in:
Bibliographic Details
Main Authors: Manish Kumar, Anant Kumar Verma, Claudio Burgos-Mellado, Raj Kumar Jarial, Ravinder Nath, Bhumaiah Jula, Diego Munoz-Carpintero, Catalina Gonzalez-Castano, Pedro Roncero-Sanchez
Format: Article
Language:English
Published: IEEE 2024-01-01
Series:IEEE Open Journal of Instrumentation and Measurement
Subjects:
Amplitude estimation
band pass filter (BPF)
frequency estimation
grid synchronization
phase estimation
three-phase system
Online Access:https://ieeexplore.ieee.org/document/10529140/
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The performance enhancement of an inverter-based grid-connected system necessitates a fast and accurate dynamic response in terms of estimating three-phase grid voltage attributes. The synchronous reference frame phase-locked loop (PLL) and/or the frequency-locking (i.e., frequency-locked loop) approaches are widely used in practical applications. However, due to the phase/frequency feedback loops, the aforementioned parameter estimation schemes may experience instability and provide a slow dynamic response. This work presents a PLL-less grid synchronization solution for three-phase applications to counter the slower dynamic response and demonstrate better immunity against the nonideality of a three-phase grid. In order to remove even and odd-order harmonics and extract the fundamental frequency positive sequence (FFPS), the proposed method employs a combination of band pass filters (CBPFs). Additionally, a novel frequency estimation algorithm is developed, which accurately estimates the angular three-phase grid frequency. Furthermore, the phase angle and amplitude are adaptively estimated using an off-line error-resolving approach, which is derived from the transfer function of the proposed prefiltering solution. Finally, the experimental findings validate the robustness of the current proposal.
ISSN:2768-7236

Similar Items