Active damping method based self‐adjust notch filter for current source converter. Issue 11 (9th August 2019)

• Record Type: Journal Article
• Authors: Zhong, Cheng; Chen, Qiang; Jing, Zhou
• Is Part Of: Journal of engineering. Volume 2019:Issue 11(2019)
• Page Start: 8236
• Page End: 8244
• Publication Date: 2019-08-09
• Subjects: invertors -- power convertors -- notch filters -- damping -- power harmonic filters -- power grids -- inductors; active damping method based self‐adjust notch filter -- current source converter -- inductor–capacitor filter -- CSC -- resonance peak -- control stability -- amplifying harmonic component -- resonance frequency -- notch filter active damping method -- control loop -- control gain -- grid inductance -- power system operating conditions change -- notch filter damping performance -- harmonic impedance estimation method -- notch filter centre frequency; Engineering -- Periodicals; Engineering; Electronic journals; Periodicals; 620.005
• DOI: 10.1049/joe.2018.5292
• Languages: English
• ISSNs: 2051-3305

Abstract

Abstract : Inductor–capacitor (LC) filter in current source converter (CSC) exits resonance peak, which result in reducing control stability and amplifying harmonic component near resonance frequency. This study proposed a simply self‐adjust notch filter active damping method for CSC. A notch filter is inserted into control loop to damp the control gain at resonance frequency, no need of additional sensor. The grid inductance varies as power system operating conditions change, which deteriorates notch filter damping performance because of resonance frequency changing. The harmonic impedance estimation method is used in the paper to estimate grid inductance and actively adjust notch filter centre frequency. Both simulation and experimental results verified the effectiveness and robustness of the proposed method.