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

Haoyao Nie and Xiaohua Nie
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Haoyao Nie: School of Economics and Management, Nanchang University, Nanchang 330031, China
Xiaohua Nie: Department of Energy and Electrical Engineering, Nanchang University, Nanchang 330031, China

Energies, 2021, vol. 14, issue 23, 1-15

Abstract: 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.

Keywords: distorted AC signal; Kalman filter; phase angle dynamic model; orthogonal vector dynamic model; state noise covariance; sampling cycle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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