Two control schemes to enhance the dynamic performance of the STATCOM and SSSC

Author

Norouzi, A.H. ; Sharaf, A.M.

Author_Institution

Electr. & Comput. Eng. Dept., Univ. of New Brunswick, Fredericton, NB, Canada

Volume

20

Issue

1

fYear

2005

Firstpage

435

Lastpage

442

Abstract

The paper presents an in-depth investigation of the dynamic performance of the Static Synchronous Compensator (STATCOM) and the Static Synchronous Series Compensator (SSSC) theoretically and by exact digital simulation. A 24-pulse GTO dc-ac converter model is designed to represent the operation of the STATCOM and SSSC within a power transmission system. Two major factors of the STATCOM instability are analyzed and a new Automatic Gain Controller (AGC) is proposed to ensure the stable operation of the STATCOM under various load conditions. It is shown that the Phase-Locked Loop (PLL) inherent delay has a great effect on the dynamic operation of the SSSC and a new auxiliary regulator is proposed to enhance the dynamic performance of the SSSC. The proposed control schemes are validated by digital simulation.

Keywords

DC-AC power convertors; automatic gain control; compensation; digital simulation; electric current control; phase locked loops; power engineering computing; power transformers; power transmission control; static VAr compensators; PLL; STATCOM; automatic gain controller; dc-ac converter; digital simulation; phase-locked loop; power transmission system; static synchronous series compensator; Automatic voltage control; Capacitors; DC generators; Digital simulation; Load flow; Phase locked loops; Power system harmonics; Power transmission lines; Regulators; Voltage control; 24-pulse converter; Automatic gain controller; auxiliary regulator; dynamic performance; static synchronous compensator (STATCOM); static synchronous series compensator (SSSC);

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2004.839725

Filename

1375124