Simulations of prefiring NGH damping scheme on suppressing torsional oscillations using EMTP

Author

Wang, Li

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

12

Issue

2

fYear

1997

fDate

5/1/1997 12:00:00 AM

Firstpage

882

Lastpage

888

Abstract

This paper presents the simulation results of the employment of both conventional firing and prefiring NGH damping schemes on damping unstable torsional oscillations occurring in the IEEE Second Benchmark Model, system-1 which contains a turbine-generator set connected to an infinite bus through two parallel transmission lines, one of which is series-capacitor compensated. The electromagnetic transient program (EMTP) is employed to simulate the damping effects respectively contributed by the two damping NGH schemes. The simulation results show that the NGH device is capable to damp out low level subsynchronous oscillations of the studied system much faster by prefiring at an advanced angle than by conventional firing scheme

Keywords

circuit oscillations; control system analysis computing; power system analysis computing; power system control; power system stability; power transmission lines; software packages; subsynchronous resonance; torsion; EMTP; IEEE Second Benchmark Model; computer simulation; control simulation; low-level subsynchronous oscillations; parallel transmission lines; power systems; prefiring NGH damping scheme; series-capacitor compensation; torsional oscillations suppression; turbine-generator set; Capacitors; Computational modeling; Damping; EMTP; Employment; Power transmission lines; Resistors; Resonance; Shafts; Thyristors;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.589744

Filename

589744