Analysis and performance evaluation of a distribution STATCOM for compensating voltage fluctuations

Author

Sensarma, P.S. ; Padiyar, K.R. ; Ramanarayanan, V.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India

Volume

16

Issue

2

fYear

2001

fDate

4/1/2001 12:00:00 AM

Firstpage

259

Lastpage

264

Abstract

Controller design of a STATCOM-based voltage compensator requires a valid analytical model of the system. If phasor algebra is used for modeling, it is difficult to accurately describe the STATCOM behavior during compensation of subcycle transients in the PCC voltage. In this paper, a small-signal model of the system, with a distribution line, is derived. Predictions based on frequency-domain analysis are made, which are validated by experimental results. This model, therefore, can be used for controller design where subcycle voltage transients are to be compensated. It is shown that the voltage controller, so designed, can accomplish voltage sag mitigation. A discussion on the design of DC bus voltage controller-and experimental results showing its performance-is also included

Keywords

control system synthesis; power distribution control; power supply quality; power system transients; static VAr compensators; voltage control; voltage regulators; DC bus voltage controller; STATCOM-based voltage compensator; controller design; distribution STATCOM; distribution line; frequency-domain analysis; performance evaluation; phasor algebra; power quality; small-signal model; subcycle transients; subcycle voltage transients compensation; voltage controller design; voltage fluctuations compensation; voltage sag mitigation; Algebra; Automatic voltage control; Frequency domain analysis; Performance analysis; Power system modeling; Power system transients; Reactive power; Steady-state; Voltage control; Voltage fluctuations;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.915492

Filename

915492