A Single-Loop Repetitive Voltage Controller with an Active Damping Control Technique

Younghoon Cho, Byeng-Joo Byen, Han-Sol Lee and Kwan-Yuhl Cho
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Younghoon Cho: Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
Byeng-Joo Byen: Department of Electrical Engineering, Konkuk University, Seoul 05029, Korea
Han-Sol Lee: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea
Kwan-Yuhl Cho: Department of Control and Instrumentation Engineering, Korea University of Transportation, Chungju 27469, Korea

Energies, 2017, vol. 10, issue 5, 1-13

Abstract: This paper proposes a single-loop repetitive voltage control strategy which incorporates the active damping control feature for single-phase uninterruptible power supply (UPS) applications. The proposed method reduces the effect of the LC resonant peak, which limits the control bandwidth and deteriorates the stability of the entire control loop by effectively increasing the damping component. Due to the increased stability margin, a repetitive controller working together with a proportional-resonant (PR) controller can be easily adopted. Moreover, the voltage error is minimized even under severe non-linear load conditions. It is confirmed that the proposed single-loop controller achieves excellent and stable voltage regulation performance by evaluating the entire loop-gain of the system and the output impedance. Both the simulation and the experimental results for a 1.5 kW UPS inverter show agree well with the analyses, and the excellence of the proposed method has been verified.

Keywords: uninterruptible power supply (UPS); repetitive voltage control; active damping (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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