Title :
A novel compensator for unbalanced three phase distribution feeders
Author :
Hongfa, Ding ; Xianzhong, Dum ; Yangzan, He
Author_Institution :
Dept. of Electr. Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
A new reactive power compensator to reduce the negative and zero sequence components caused by unbalanced loads and to adjust load bus voltages for three-phase three-wire and three-phase four-wire distribution feeders is presented. The new compensator consists of a three-phase voltage source inverter (to eliminate negative sequence components and adjust the load bus voltages) and a single-phase voltage source inverter (to eliminate zero sequence components). The use of dq phasor transformation control based on instantaneous value and sinusoidal pulse width modulation (SPWM) results in a system with fast dynamic response. The derivations of the mathematical model and computer simulations verify and explain the feasibility of this approach
Keywords :
compensation; dynamic response; invertors; power distribution control; reactive power; computer simulations; dq phasor transformation control; fast dynamic response; load bus voltages; load bus voltages adjustment; mathematical model; negative sequence components reduction; reactive power compensator; single-phase voltage source inverter; sinusoidal pulse width modulation; three-phase four-wire distribution feeders; three-phase three-wire distribution feeders; three-phase voltage source inverter; unbalanced loads; unbalanced three phase distribution feeders; zero sequence components reduction; Active filters; Passive filters; Power harmonic filters; Pulse power systems; Pulse width modulation inverters; Reactive power; Resonance; Static VAr compensators; Transformers; Voltage;
Conference_Titel :
Power Engineering Society Winter Meeting, 2000. IEEE
Print_ISBN :
0-7803-5935-6
DOI :
10.1109/PESW.2000.847181
