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.
Palabras Clave: AC/DC, DC power flow, HVDC transmission, linear power flow, multi-terminal DC (MTDC), VSC.
Índice de impacto JCR y cuartil WoS: 6.663 - Q1 (2020)
Referencia DOI: 10.1109/TPWRS.2021.3114660
In press: Septiembre 2021.
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.