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

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

doi:10.1109/tpwrs.2012.2236109

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

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

Authors

E. Acha

Dr Behzad Kazemtabrizi behzad.kazemtabrizi@durham.ac.uk
Associate Professor

L.M. Castro

Abstract

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.

Citation

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. https://doi.org/10.1109/tpwrs.2012.2236109

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
DOI	https://doi.org/10.1109/tpwrs.2012.2236109

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