Open AccessPerformance‐recovery proportional‐type output‐voltage tracking algorithm of three‐phase inverter for uninterruptible power supply applications
Author(s) -
Kim SeokKyoon
Publication year - 2019
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2018.5377
Subject(s) - uninterruptible power supply , control theory (sociology) , offset (computer science) , inverter , voltage , capacitor , computer science , transient (computer programming) , power (physics) , three phase , engineering , control (management) , electrical engineering , physics , quantum mechanics , artificial intelligence , programming language , operating system
This study suggests a proportional‐type output‐voltage control algorithm of a three‐phase inverter for uninterruptible power supply applications with performance‐recovery and offset‐free properties. It makes the two contributions. The first one is to introduce first‐order disturbance observers (DOBs) so as to exponentially estimate disturbances originating from model‐plant mismatches. The second one is to rigorously prove that the proposed proportional‐type feedback‐linearising controller equipped with DOBs guarantees performance‐recovery and offset‐free properties. The experimental results conducted in this study, which uses a 10 kW three‐phase inverter with an output capacitor, confirm that the closed‐loop performance is satisfactory in both transient and steady‐state periods.