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

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

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
• Public URL: https://durham-repository.worktribe.com/output/1468701