Summary:
Power flow analysis is a key tool for planning, operation and control of power systems. With future hybrid Supergrids in mind, a wide variety of power flow algorithms for multi-terminal VSC AC/DC systems have been proposed. However, the nonlinear nature of these formulations represents a challenge for its use in real power systems. Whereas in the study of AC networks linear approximations are frequently utilized to speed up multi-scenario steady-state analysis, an equivalent tool has not been proposed for hybrid AC/DC grids. This paper fills that gap by formulating a linear MW-only power flow algorithm with losses for multi-terminal VSC AC/DC systems. The proposed algorithm provides a consistent estimation of converters' losses and allows modelling of all branches within the converter stations. Moreover, two novel schemes for the inclusion of DC network losses are proposed and a circuit-equivalent model of the linear power flow problem in multi-terminal VSC AC/DC systems is suggested.
Keywords: AC/DC, DC power flow, HVDC transmission, linear power flow, multi-terminal DC (MTDC), VSC.
JCR Impact Factor and WoS quartile: 6,600 - Q1 (2022); 6,500 - Q1 (2023)
DOI reference:
https://doi.org/10.1109/TPWRS.2021.3114660
Published on paper: May 2022.
Published on-line: September 2021.
Citation:
J.C. Fernández-Pérez, F.M. Echavarren, L. Rouco, Linear power flow algorithm with losses for multi-terminal VSC AC/DC power systems. IEEE Transactions on Power Systems. Vol. 37, nº. 3, pp. 1739 - 1749, May 2022. [Online: September 2021]
