This paper presents a unified power flow algorithm for large and complex mixed AC/DC power systems based on the partitioning of power grids, a version of the two-level Newton method, and the modified nodal analysis formulation. Partitioning significantly increases numerical efficiency without altering the accuracy of the power flow solution. This approach can be applied to any combination of multiple DC and possibly non-synchronized AC systems. It considers the steady-state interaction of AC and DC systems for a wide range of converter representations and control functions. Simplification of elements within the converter stations is not required. Both DC and AC-side converter losses are adequately accounted for by using a generalized converter loss model. The steady-state converter equations are derived in their most general form, with the AC and/or DC-side power exchange or voltages defined as controlled quantities.

Partitioning-Based Unified Power Flow Algorithm for Mixed MTDC/AC Power Systems

Bizzarri F.;Del Giudice D.;Linaro D.;Brambilla A. M.
2021

Abstract

This paper presents a unified power flow algorithm for large and complex mixed AC/DC power systems based on the partitioning of power grids, a version of the two-level Newton method, and the modified nodal analysis formulation. Partitioning significantly increases numerical efficiency without altering the accuracy of the power flow solution. This approach can be applied to any combination of multiple DC and possibly non-synchronized AC systems. It considers the steady-state interaction of AC and DC systems for a wide range of converter representations and control functions. Simplification of elements within the converter stations is not required. Both DC and AC-side converter losses are adequately accounted for by using a generalized converter loss model. The steady-state converter equations are derived in their most general form, with the AC and/or DC-side power exchange or voltages defined as controlled quantities.
AC-DC power converters
AC/DC
circuit partitioning
Convergence
HVDC transmission
Mathematical model
MTDC
Newton method
Partitioning algorithms
power flow analysis
Power system stability
Power systems
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1170474
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