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Design and operation of Hybrid Multi-Terminal Soft Open Points using Feeder Selector Switches for flexible distribution system interconnection

Lookup NU author(s): Dr Matthew Deakin, Professor Phil Taylor, Professor Janusz Bialek



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


© 2022. Distribution systems will require new cost-effective solutions to provide network capacity and increased flexibility to accommodate Low Carbon Technologies. To address this need, we propose the Hybrid Multi-Terminal Soft Open Point (Hybrid MT-SOP) to efficiently provide distribution system interconnection capacity. Each leg of the Hybrid MT-SOP has an AC/DC converter connected in series with a bank of AC switches (Feeder Selector Switches) to allow the converter to connect to any of the feeders at a node. Asymmetric converter sizing is shown to increase feasible power transfers by up to 50% in the three-terminal case, whilst a conic mixed-integer program is formulated to optimally select the device configuration and power transfers. A case study shows the Hybrid MT-SOP increasing utilization of the converters by more than one third, with a 13% increase in system loss reduction as compared to an equally-sized MT-SOP.

Publication metadata

Author(s): Deakin M, Taylor PC, Bialek J, Ming W

Publication type: Article

Publication status: Published

Journal: Electric Power Systems Research

Year: 2022

Volume: 212

Print publication date: 01/11/2022

Online publication date: 26/07/2022

Acceptance date: 02/07/2022

Date deposited: 09/05/2023

ISSN (print): 0378-7796

ISSN (electronic): 1873-2046

Publisher: Elsevier BV


DOI: 10.1016/j.epsr.2022.108516

ePrints DOI: 10.57711/sqcx-g359


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