Impact of inverter station on torsional dynamics of parallel HVDC-AC power system

Author

Iravani, M.R. ; Zhao, Z. ; Hamouda, R.M.

Author_Institution

Dept. of Electr. Eng., Toronto Univ., Ont., Canada

Volume

8

Issue

3

fYear

1993

fDate

8/1/1993 12:00:00 AM

Firstpage

997

Lastpage

1003

Abstract

The authors investigate the impact of an inverter station on the torsional dynamics of a turbine-generator set which is located at the rectifier side of a parallel HVDC-AC power system. The stiffness of an AC bus is described in terms of its effective short-circuit ratio (ESCR). The studies show that depending on the stiffness of the inverter AC bus and electrical coupling between the inverter and rectifier AC buses, the inverter closed loop control can have a noticeable contribution to the instability of torsional dynamics. This adverse torsional impact is observed in the study results even when the inverter AC bus is fairly strong (ESCR larger than 5.0)

Keywords

closed loop systems; invertors; power system interconnection; short-circuit currents; substations; torsion; AC bus; effective short-circuit ratio; electrical coupling; inverter closed loop control; inverter station; parallel HVDC-AC power system; rectifier side; torsional dynamics; turbine-generator set; AC generators; Control systems; Couplings; Frequency; HVDC transmission; Inverters; Power system dynamics; Power system harmonics; Rectifiers; Voltage;

fLanguage

English

Journal_Title

Power Systems, IEEE Transactions on

Publisher

ieee

ISSN

0885-8950

Type

jour

DOI

10.1109/59.260901

Filename

260901