Title :
A high voltage large capacity dynamic VAr compensator using multilevel voltage source inverter
Author :
Choi, Nam S. ; Jung, Yong C. ; Liu, Hyo L. ; Cho, Gyu H.
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
fDate :
29 Jun-3 Jul 1992
Abstract :
A multilevel pulse-width-modulation (PWM) voltage-source inverter is connected to a static volt-ampere-reactive (VAr) compensator (SVC) as a large-scale power source. The SVC can be directly connected to AC mains of 6600 V, allowing full utilization of semiconductor devices like gate turn-off thyristors (GTOs). The voltage balancing condition of the DC slide capacitors is identified based on the fundamental circuit modeling of the inverter, and a five-level PWM is used to meet the condition. Owing to the multilevel approach, a low distortion in the input currents results and filter size thus is minimized. To confirm the validity of the fundamental circuit modeling of the SVC system with a five-level inverter, the system was simulated using commercial simulation packages
Keywords :
digital simulation; electrical engineering computing; invertors; pulse width modulation; static VAr compensators; DC slide capacitors; PWM; circuit modeling; commercial simulation packages; gate turn-off thyristors; high voltage; large capacity dynamic VAr compensator; multilevel voltage source inverter; pulse-width-modulation; voltage balancing; Capacitors; Circuit simulation; Large-scale systems; Pulse inverters; Pulse width modulation inverters; Reactive power; Semiconductor devices; Static VAr compensators; Thyristors; Voltage;
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.1992.254835
