Estimating damping effectiveness of BPA´s thyristor controlled series capacitor by applying time and frequency domain methods to measured response

Author

Trudnowski, D.J. ; Donnelly, M.K. ; Hauer, J.F.

Author_Institution

Pacific Northwest Lab., Richland, WA, USA

Volume

11

Issue

2

fYear

1996

fDate

5/1/1996 12:00:00 AM

Firstpage

761

Lastpage

766

Abstract

Recently, a 500 kV thyristor controlled series capacitor (TCSC) was installed in the Bonneville Power Administration system in the Northwestern United States. Extensive field testing has included modulation experiments to determine the effect of the TCSC on low-frequency oscillations. This paper discusses modulation procedures, analysis methods, and results for estimating the damping effectiveness of the TCSC. Modulation methods include driving the TCSC with step and random noise, and analysis techniques include time (Prony analysis) and frequency-domain identification. Results indicate that: (1) the TCSC can have significant impact on system dynamics; and (2) under a very small feedback gain, the TCSC provides measurable added damping

Keywords

control system analysis; damping; frequency-domain analysis; power capacitors; power system control; power system measurement; power system stability; thyristor applications; time-domain analysis; 500 kV; EHV power systems; Prony analysis; damping effectiveness estimation; feedback gain; frequency domain methods; frequency-domain identification; low-frequency oscillations; measured response; modulation experiments; power system dynamic stability; thyristor controlled series capacitor; time domain methods; Control systems; Damping; Feedback; Frequency domain analysis; Gain measurement; Low-frequency noise; Power capacitors; Power engineering and energy; Power measurement; Power system dynamics; Power system security; Substations; System testing; Testing; Thyristors;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.496151

Filename

496151