Three-Phase Adaptive Frequency Estimator with a Delayed Signal Cancellation Pre-Filter Under Heavily Distorted Grid Conditions

A reliable and precise frequency detection algorithm is useful for different control strategies, especially on microgrid and aerospace applications. The widely-linear adaptive frequency estimator is based on the Augmented Complex Least Mean Square Filter and, thus inherits its fast dynamic response....

Full description

Saved in:
Bibliographic Details
Published in2019 IEEE 15th Brazilian Power Electronics Conference and 5th IEEE Southern Power Electronics Conference (COBEP/SPEC) pp. 1 - 6
Main Authors Grabovski, E. F. C., Heldwein, M. L., Mussa, S. A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2019
Subjects
adaptive filtering
Delays
Estimation
Frequency estimation
Harmonic analysis
Heuristic algorithms
Power harmonic filters
signal processing
Online AccessGet full text

Cover

More Information
Summary:A reliable and precise frequency detection algorithm is useful for different control strategies, especially on microgrid and aerospace applications. The widely-linear adaptive frequency estimator is based on the Augmented Complex Least Mean Square Filter and, thus inherits its fast dynamic response. However, it presents a high susceptibility to input noise, which might present an unexpected behaviour under distorted grid conditions. Therefore, this work proposes a Delayed Signal Cancellation pre-filter stage to eliminate most of the harmonics to achieve fast estimation response and high rejection of harmonic distortions.
ISSN:2643-9778
DOI:10.1109/COBEP/SPEC44138.2019.9065617