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.

Volume

4

fYear

2006

fDate

8-12 Oct. 2006

Firstpage

1716

Lastpage

1723

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE

Conference_Location

Tampa, FL

ISSN

0197-2618

Print_ISBN

1-4244-0364-2

Electronic_ISBN

0197-2618

Type

conf

DOI

10.1109/IAS.2006.256767

Filename

4025455