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Adaptive Damping Scheme of LCL Filter Resonance under Inductance Variation for a Single-Phase Grid-Connected Inverter

Title
Adaptive Damping Scheme of LCL Filter Resonance under Inductance Variation for a Single-Phase Grid-Connected Inverter
Author
김래영
Keywords
Adaptive notch filter; Inductor variation; Filter based active damping; Single phase LCL-filter based converter
Issue Date
2015-06
Publisher
IEEE
Citation
Power Electronics and ECCE Asia (ICPE-ECCE Asia), 2015 9th International Conference , Page. 978-983
Abstract
LCL-filter is broadly utilized to attenuate the switching harmonic ripple generated from the PWM (Pulse Width Modulation) based converters and inverters. However, due to the resonance problem the stability issue should be overcome. Among many solutions, notch filter based active damping is effective solution for not needing additional sensor and damping resistor. But that strategy is vulnerable to filter parameter variation, which varies the resonant frequency. This paper proposes adaptive notch filter concept for a single-phase inverter in considering parameter variation of two inductors with respect to current. Due to that estimation performance, it provides with a size and cost-effective solution for selecting filter materials. Also, this adaptive filter can be designed narrower, which realizes less phase attenuation, thereby securing more loop gain of total system. Therefore, current control loop secures higher bandwidth. Simulation verification of the proposed method is given through MATLAB/Simulink and PSIM software.
URI
http://ieeexplore.ieee.org/document/7167900/http://hdl.handle.net/20.500.11754/25820
ISBN
978-8-9570-8254-6
ISSN
2150-6086; 2150-6078
DOI
10.1109/ICPE.2015.7167900
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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