Solving the Power Flow problem on Integrated Transmission-Distribution Networks: A Review and Numerical Assessment

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Abstract

Power ow simulations form an essential tool for electricity network analysis but conventional models are designed to work on a separated transmission or distribution network only. The continuing growth of electricity consumption, demand side participation, and renewable resources makes the electricity net- works co-dependent. Integrated models incorporate the coupling of the net- works and interaction that they have on each other, representing the power ow within this changing environment accurately. Several numerical methods are available to solve the power ow problem on integrated networks. They can be categorized as a untied or as a splitting method and networks can be modelled as a homogeneous or hybrid network. In this paper, we review and assess these methods on the network models by running simulations on small test networks and comparing the outcome on their numerical performance, ie on convergence rate and CPU-time. The re- view shows that the convergence rate is comparable for most of the methods, but that hybrid networks have a slight advantage in computational time. Realistic network models, running on millions of buses and with large distribution networks, should give a better insight into the speed of the computations.

Original languageEnglish
Place of PublicationDelft
PublisherDelft University of Technology
Number of pages28
Publication statusPublished - 2021

Publication series

NameReports of the Delft Institute of Applied Mathematics
Volume21-01
ISSN (Print)1389-6520

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