Title :
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
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);
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2014 IEEE
Conference_Location :
Pittsburgh, PA
DOI :
10.1109/ECCE.2014.6953390
