Title :
Passivity-based stabilization of voltage-source converters equipped with LCL input filters
Author :
Harnefors, Lennart ; Yepes, Alejandro G. ; Vidal, Ana ; Doval-Gandoy, Jesus
Author_Institution :
ABB, Corp. Res., Vasteras, Sweden
Abstract :
The time delay in the current control loop of a grid-connected voltage-source converter (VSC) may cause instability if the VSC is equipped with an inductive-capacitive-inductive (LCL) input filter. However, instability is prevented if the input admittance of the VSC can be made passive. This paper presents a systematic method for gaining passivity. Thereby, stability is obtained for any LCL-filter resonance and for any passive grid impedance. The method is equally applicable to single-phase and three-phase systems.
Keywords :
LC circuits; electric current control; power convertors; power filters; power grids; stability; LCL input filter; LCL-filter resonance; VSC; current control loop; grid-connected voltage-source converter; inductive-capacitive-inductive input filter; input admittance; passive grid impedance; passivity-based stabilization; time delay; Admittance; Asymptotic stability; Capacitors; Converters; Damping; Frequency control; Solids; Converter control; LCL filter; passivity; resonance; stabilization;
Conference_Titel :
Industrial Electronics Society, IECON 2014 - 40th Annual Conference of the IEEE
DOI :
10.1109/IECON.2014.7048731
