Stability analysis of converter-grid interaction using the converter input admittance

Author

Harnefors, Lennart ; Bongiorno, Massimo ; Lundberg, Stefan

Author_Institution

ABB Power Syst., Ludvika

fYear

2007

fDate

2-5 Sept. 2007

Firstpage

1

Lastpage

10

Abstract

A grid-connected power electronic converter can cause local instabilities when interacting other subsystems-particularly poorly damped resonances-that are electrically nearby. However, oscillations at a certain frequency cannot build up due to the converter if its differential input admittance has positive conductance (real part) at that frequency, since power is then dissipated. Input-admittance expressions for a voltage-source converter are derived in this paper. By adjusting the controller parameters, the admittance can be shaped in order to get positive conductance in desired frequency regions.

Keywords

electric admittance; power convertors; power electronics; power grids; power system stability; HVDC; controller parameter; converter control; converter input admittance; converter-grid interaction; grid-connected power electronic converter; input admittance expression; positive conductance; robust control; stability analysis; voltage source converter; Admittance; Control systems; HVDC transmission; Impedance; Matrix converters; Power conversion; Power system stability; Pulse width modulation converters; Resonance; Stability analysis; Converter control; HVDC; Voltage Source Converter (VSC); robust control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Applications, 2007 European Conference on

Conference_Location

Aalborg

Print_ISBN

978-92-75815-10-8

Electronic_ISBN

978-92-75815-10-8

Type

conf

DOI

10.1109/EPE.2007.4417497

Filename

4417497