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A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method

Acha, E.; Kazemtabrizi, B.; Castro, L.M.

A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method Thumbnail


E. Acha

L.M. Castro


The paper presents a new model of the VSC-HVDC aimed at power flow solutions using the Newton-Raphson method. Each converter station is made up of the series connection of a voltage source converter (VSC) and its connecting transformer which is assumed to be a tap-changing (LTC) transformer. The new model represents a paradigm shift in the way the fundamental frequency, positive sequence modeling of VSC-HVDC links are represented, where the VSCs are not treated as idealized, controllable voltage sources but rather as compound transformer devices to which certain control properties of PWM-based inverters may be linked - just as DC-to-DC converters have been linked, conceptually speaking, to step-up and step-down transformers. The VSC model, and by extension that of the VSC-HVDC, takes into account, in aggregated form, the phase-shifting and scaling nature of the PWM control. It also takes into account the VSC inductive and capacitive reactive power design limits, switching losses and ohmic losses.


Acha, E., Kazemtabrizi, B., & Castro, L. (2013). A New VSC-HVDC Model for Power Flows Using the Newton-Raphson Method. IEEE Transactions on Power Systems, 28(3), 2602-2612.

Journal Article Type Article
Online Publication Date Jan 21, 2013
Publication Date 2013-08
Deposit Date Feb 4, 2013
Publicly Available Date Nov 9, 2020
Journal IEEE Transactions on Power Systems
Print ISSN 0885-8950
Electronic ISSN 1558-0679
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 28
Issue 3
Pages 2602-2612


Accepted Journal Article (544 Kb)

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