Title :
Analysis and design of a series voltage unbalance compensator based on a three-phase VSI operating with unbalanced switching functions
Author :
Campos, Alexandre ; Joos, Geza ; Ziogas, XPhoivos ; Lindsay, James
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
fDate :
29 Jun-3 Jul 1992
Abstract :
A series voltage compensator for three-phase unbalanced sources is presented and analyzed. The system, based on a three-phase voltage source inverter connected in series to the supply through a three-phase delta-wye power transformer, proves to be feasible and performs as expected. A 1.3 kVA prototype was built and tested with 10.75% of unbalance and 9.01% of magnitude error (|MF|=0.909). The results showed a very good correlation with the expected performance, producing a balanced line-to-line load voltage with a low harmonic content (average THD=20%), without filter. The compensator required only 168.8 VA, which shows one of the main advantages of the compensator scheme proposed
Keywords :
compensation; harmonics; invertors; load (electric); network analysis; network synthesis; power transformers; switching circuits; voltage control; 1.3 kVA; 168.8 VA; balanced line-to-line load voltage; delta-wye power transformer; design; network analysis; network synthesis; performance; series voltage unbalance compensator; three-phase VSI; total harmonic distortion; unbalanced switching functions; voltage control; voltage source inverter; Commutation; Design engineering; Frequency conversion; Impedance; Power harmonic filters; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Switching frequency; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1992. PESC '92 Record., 23rd Annual IEEE
Conference_Location :
Toledo
Print_ISBN :
0-7803-0695-3
DOI :
10.1109/PESC.1992.254735
