Stability Analysis of Two-Terminal VSC-HVDC Systems using the Net-Damping Criterion
Journal article, 2016

This paper performs a frequency-domain investigation in two-terminal voltage-source-converter–HVDC (VSC–HVDC) systems, focusing on the use of the net-damping criterion to investigate poorly damped conditions and closed-loop stability. The system is represented as a feedback interconnection of two subsystems, defined in this paper as: 1) a dc-grid input impedance and 2) a VSC input admittance. The damping characteristics of the two subsystems are defined at critical frequencies and their separate contribution to the closed-loop stability is assessed by the net-damping criterion. A variety of study cases demonstrates the effectiveness of the latter as a powerful tool for stability investigation, while a correlation has been derived between the net-damping value and the damping factor of the poorly damped poles of the system.

frequency-domain analysis

net damping

DC-network stability

voltage-source converter– high-voltage direct current (VSC-HVDC)

poor damping


Georgios Stamatiou

Chalmers, Energy and Environment, Electric Power Engineering

Massimo Bongiorno

Chalmers, Energy and Environment, Electric Power Engineering

IEEE Transactions on Power Delivery

0885-8977 (ISSN) 1937-4208 (eISSN)

Vol. 31 4 1748-1756 7378497

Areas of Advance


Subject Categories

Control Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering



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