The Grid Voltage's Asymmetrical Fault Detection Method based on Variable-Step LMS Adaptive Notch Filter Algorithm

For wind turbine systems (WTS), the grid voltage fault detection algorithm determines the response speed of WTS to grid voltage fault. This paper proposed a sort of voltage asymmetrical fault detection method, to detect negative-sequence component in grid voltage, variable-step (VS) least mean squar...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science Vol. 267; no. 4; pp. 42033 - 42040
Main Authors: Wang, Yifan, Wang, Shuhong, Zhang, Ailing, Wang, Jingxuan
Format: Journal Article
Language:English
Published: Bristol IOP Publishing 01.05.2019
Subjects:
Adaptive algorithms
Algorithms
Asymmetry
Electric potential
Fault detection
Notch filters
Self tuning
Turbines
Voltage
Wind power
Wind turbines
ISSN:1755-1307, 1755-1315
Online Access:Get full text
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Summary:For wind turbine systems (WTS), the grid voltage fault detection algorithm determines the response speed of WTS to grid voltage fault. This paper proposed a sort of voltage asymmetrical fault detection method, to detect negative-sequence component in grid voltage, variable-step (VS) least mean square (LMS) adaptive notch filter (ANF) is applied to eliminate the 2nd-harmonic frequency component. The application of ANF can separate negative-sequence component from grid voltage, therefore the voltage asymmetrical fault can be detected; the self-tuning of controllable parameters of ANF can be realized by the LMS adaptive algorithm, which is convenient and efficient in practical application; furthermore, because the variable step size adjustment is adopted, the contradiction between convergence rate and steady-state error of ANF can be solved. The MATLAB/Simulink simulation and FFT analysis results are in conformity with the theorical analysis, which proves the feasibility of the method.
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ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/267/4/042033