Research on Dynamic Modeling of KF Algorithm for Detecting Distorted AC Signal

Autor:	Haoyao Nie, Xiaohua Nie
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	distorted AC signal Kalman filter phase angle dynamic model orthogonal vector dynamic model state noise covariance sampling cycle Technology
Zdroj:	Energies, Vol 14, Iss 23, p 8175 (2021)
Druh dokumentu:	article
ISSN:	1996-1073
DOI:	10.3390/en14238175
Popis:	Kalman filter (KF) is often based on two models, which are phase angle vector (PAV) model and orthogonal vector (OV) model, in the application of distorted grid AC signal detection. However, these two models lack rigorous and detailed derivation from the principle of dynamic modeling. This paper presents a phase angle vector dynamic (PAVD) model and an orthogonal vector dynamic (OVD) model, which are combined with Kalman filter for detecting distorted grid AC signal. They reveal that the state noise covariance of the dynamic model−based KF is related to the sampling cycle, and overcome the defect of more detecting error for conventional model−based KF. Experiment and evaluation results show that the proposed KF algorithms are reasonable and effective. Therefore, this paper contributes a guiding significance for the application of KF algorithm in harmonic detection.
Databáze:	Directory of Open Access Journals
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