Stability improvement of matrix converter by digitally filtering the input voltages in stationary frame. Issue 4 (1st March 2016)

• Record Type: Journal Article
• Authors: Lei, Jiaxing; Zhou, Bo; Qin, Xianhui; Bian, Jinliang; Wei, Jiadan
• Is Part Of: IET power electronics. Volume 9:Issue 4(2016)
• Page Start: 743
• Page End: 750
• Publication Date: 2016-03-01
• Subjects: matrix convertors -- AC‐AC power convertors -- stability -- digital filters -- high‐pass filters -- power control; matrix converter stability improvement -- digital input voltage filtering -- stationary frame -- constant power control strategy -- input disturbance suppression -- source current oscillation -- input voltage oscillation -- system instability -- digital high‐pass filters -- zero gain -- proportional coefficient adjustment -- time constant adjustment; Power electronics -- Periodicals; 621.31705
• DOI: 10.1049/iet-pel.2015.0163
• Languages: English
• ISSNs: 1755-4535

Abstract

Abstract : The constant power control strategy of matrix converter (MC), which is commonly adopted in practice to suppress input disturbances, could result in system instability and oscillations of source currents and input voltages. To stabilise the system, a novel control method is proposed in this study, which is based on filtering the input voltages in stationary frame with digital high‐pass filters of zero gain at the fundamental frequency. The filtered signals are injected to input currents so as to increase the input admittances for stability improvement. Since the filtered signals do not contain any fundamental frequency components, the proposed method would not affect the normal operation of MC. No matter the operation mode of MC is motoring or generating, the proposed method is always effective to improve system stability by adjusting the proportional coefficient and time constant of the digital filters. The feasibility and validity of the proposed method is verified by experimental results.