Modeling the output impedance of three-phase uninterruptible power supply in D-Q frame

Author

Bo Wen ; Boroyevich, Dushan ; Burgos, Rolando ; Mattavelli, Paolo

Author_Institution

Center for Power Electron. Syst. (CPES), Virginia Tech, Blacksburg, VA, USA

fYear

2014

fDate

14-18 Sept. 2014

Firstpage

163

Lastpage

169

Abstract

Three-phase Uninterruptible Power Supply (UPS) is widely used to protect critical loads. The output impedance is a very important design specification of a UPS inverter, since the output impedance of a UPS inverter determines the voltage distortion caused by the nonlinear loads and the stability of the whole system. This paper models the output impedance of a three-phase UPS inverter with current and voltage feedback control in d-q frame. Analytical model of UPS output impedance is derived, experimental results are shown to verify the analysis.

Keywords

electric current control; feedback; invertors; load regulation; power system stability; uninterruptible power supplies; voltage control; D-Q frame; critical load protection; current feedback control; nonlinear loads; output impedance modeling; three-phase UPS inverter; three-phase uninterruptible power supply; voltage distortion determination; voltage feedback control; whole system stability; Feedback control; Impedance; Integrated circuit modeling; Inverters; Stability analysis; Uninterruptible power systems; Voltage control; Impedance; Nyquist stability; uninterruptible power supply (UPS); voltage soured inverter (VSI);

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2014 IEEE

Conference_Location

Pittsburgh, PA

Type

conf

DOI

10.1109/ECCE.2014.6953390

Filename

6953390