A Fast Recursive Algorithm for Spectrum Tracking in Power Grid Systems

A major challenge for future wide area measurement systems is how to efficiently monitor and control the power system, which requires accurate and real-time tracking of the phase, frequency, and power factor of the system. The presence of inter and sub harmonics, especially in a distribution system...

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Bibliographic Details
Published in:IEEE transactions on smart grid Vol. 10; no. 3; pp. 2882 - 2891
Main Authors: Hu, B., Gharavi, H.
Format: Journal Article
Language:English
Published: United States IEEE 01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Computer simulation
Electric potential
Estimation
Frequency estimation
frequency estimation and tracking
harmonic
Harmonic analysis
Harmonic distortion
Harmonics
inter-harmonic
Power factor
Power grid
Power harmonic filters
Real time
Rectifiers
sub-harmonic
subspace
Subspace methods
Tracking
Harmonic
Inter-Harmonic
Subspace
Frequency Estimation and Tracking
Sub-harmonic
Power Grid
ISSN:1949-3053, 1949-3061
Online Access:Get full text
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Summary:A major challenge for future wide area measurement systems is how to efficiently monitor and control the power system, which requires accurate and real-time tracking of the phase, frequency, and power factor of the system. The presence of inter and sub harmonics, especially in a distribution system caused by widely used nonlinear power loads, rectifiers, and inverters, will distort estimation of phase/frequency and make it difficult to track the voltage, current, and frequency variations. In this paper we present a new approach to identify and track the harmonics, sub-harmonics, and inter-harmonics, as well as observe their impact on the power system. We propose a two-stage processing approach that consists of a subspace-based estimation method to detect and identify all harmonic components, followed by a low-complexity fast tracking algorithm to monitor frequency variations of voltage and current signals in real-time with great accuracy. The simulation results show that the proposed approach can provide highly reliable estimation and fast tracking of the harmonic components, while avoiding the impact of time variance.
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ISSN:1949-3053
1949-3061
DOI:10.1109/TSG.2018.2813881