Title :
Control and Performance of a Medium-Voltage Transformerless Cascade PWM STATCOM with Star-Configuration
Author :
Yoshii, Tsurugi ; Inoue, Shigenori ; Akagi, Hirofumi
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol.
Abstract :
This paper presents a three-phase transformerless cascade PWM STATCOM intended for installation on industrial and utility power distribution systems. It proposes a control method that devotes itself mainly to meeting a demand of reactive power, as well as to voltage-balancing of the multiple isolated and split dc capacitors. The control method is characterized by fast and stable voltage-balancing performance and easy expansion into a higher number of levels. Experimental waveforms confirm that a 200-V, 10-kVA cascade PWM STATCOM with star-configuration has the capability of inductive to capacitive (or capacitive to inductive) operation at the rated reactive power of 10 kVA within 20 ms, keeping the nine DC mean voltages controlled and balanced, even during the transient state
Keywords :
PWM power convertors; static VAr compensators; voltage control; 10 kVA; 200 V; PWM STATCOM; cascade connection; industrial power distribution system; multilevel converters; reactive power; star-configuration; static synchronous compensator; utility power distribution system; Automatic voltage control; Capacitors; Control systems; Medium voltage; Pulse modulation; Pulse transformers; Pulse width modulation; Reactive power control; Space vector pulse width modulation; Voltage control; Cascade connection; STATCOM; Voltage balancing; multi-level converters; reactive power;
Conference_Titel :
Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-0364-2
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2006.256767
