NDLI: A static synchronous compensator using hybrid multi-inverters

Content Provider	IEEE Xplore Digital Library
Author	Fukuda, S. Dongsheng Li
Copyright Year	2004
Description	Author affiliation: Graduate Sch. of Inf. Sci. & Technol., Hokkaido Univ., Sapporo, Japan (Fukuda, S.; Dongsheng Li)
Abstract	A static synchronous compensator (STATCOM) is required to have (1) less harmonic contents in the output, (2) higher compensation VA capacity, and (3) less devices losses. To satisfy these requirements this paper proposes a hybrid configuration STATCOM, which consists of two GTO inverters with square-wave switching and one neutral-point-clamped IGBT inverter with PWM switching. The GTO inverters fulfill the second and third requirements and the IGBT inverter the first requirement. The IGBT inverter generates a voltage difference between the reference output and the sum of the two GTO inverter outputs. Therefore, the IGBT inverter has two functions: cancellation of the harmonic components generated by the GTO inverters and control of the compensation current. One problem of the hybrid STATCOM is that the IGBT inverter is forced to operate in an over-modulation range if required compensation voltage of the IGBT inverter is high. To solve this problem, this paper also proposes a variable DC voltage control strategy, where the DC voltage is adaptively adjusted in accordance with the required STATCOM output voltage. As a result, the proposed STATCOM can compensate for large reactive current almost without harmonic distortion.
Sponsorship	IEEE Power Electon. Soc
Starting Page	4644
Ending Page	4648
File Size	342297
Page Count	5
File Format	PDF
ISBN	0780383990
ISSN	02759306
DOI	10.1109/PESC.2004.1354820
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-20
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pulse width modulation inverters Automatic voltage control Insulated gate bipolar transistors Pulse width modulation Voltage control Transformers Flexible AC transmission systems Switching loss Information science Harmonic distortion
Content Type	Text
Resource Type	Article

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