Analysis and controller design of static VAr compensator using three-level GTO inverter

Author

Cho, Guk C. ; Jung, Gu H. ; Choi, Nam S. ; Cho, Gyu H.

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

11

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

57

Lastpage

65

Abstract

A static VAr compensator (SVC) using a three-level GTO voltage source inverter (VSI) is presented for high-voltage, high-power applications. The three-level VSI has lower harmonic components and higher DC-link voltage than the two-level VSI and thus can be operated at lower switching frequency (f_sw<500 Hz) without excessive harmonic contents. From the DQ-transformed equivalent circuit of the presented SVC system, DC and AC analyses are carried out to find the steady-state and the dynamic characteristics of the system. Based on the open-loop transfer function of the system, a controller is designed to achieve fast dynamic response. The experimental results confirm the theoretical analyses and controller design

Keywords

DC-AC power convertors; PWM invertors; control system analysis; control system synthesis; dynamic response; equivalent circuits; harmonic distortion; power system harmonics; reactive power control; static VAr compensators; switching circuits; thyristor convertors; transfer functions; DC-link voltage; DQ-transformed equivalent circuit; control design; control simulation; dynamic characteristics; dynamic response; harmonic components; open-loop transfer function; static VAr compensator; steady-state characteristics; switching frequency; three-level GTO inverter; Equivalent circuits; Large-scale systems; Open loop systems; Power harmonic filters; Power system harmonics; Pulse width modulation inverters; Reactive power; Static VAr compensators; Switching frequency; Voltage;

fLanguage

English

Journal_Title

Power Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0885-8993

Type

jour

DOI

10.1109/63.484417

Filename

484417