DC Soft Open Points for Resilient and Reconfigurable DC Distribution Networks

Husam A. Ramadan () and Spyros Skarvelis-Kazakos
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Husam A. Ramadan: Electrical Engineering Department, Faculty of Engineering, Minia University, Minia 61519, Egypt
Spyros Skarvelis-Kazakos: School of Engineering and Informatics, University of Sussex, Brighton BN1 9RH, UK

Energies, 2022, vol. 15, issue 16, 1-23

Abstract: This paper introduces the concept, theory of operation and applications of soft open points for direct current networks (DCSOPs). The DCSOP is based on a bidirectional DC–DC converter actively controlled to behave like a normal conductor. Unlike the normal conductor, the DCSOP can transfer the electric power between nodes at different voltage levels. With this advantage, the DCSOP can effectively control the power flow direction. Thus, DCSOPs can play a vital role in the reconfiguration of DC distribution networks. The operation and control of the DCSOP device was investigated, both in transient and steady-state conditions. Then, a DCSOP was integrated into a DC microgrid model to validate its ability to change the power flow through the modelled feeders. In addition, a set of reliability indicators was calculated for the DC microgrid under different reconfiguration scenarios. It was shown that reliability is improved when the DCSOP device implements network reconfiguration. Finally, an agent-based framework for controlling the DCSOP in a DC microgrid is presented. A fundamental implementation was created for reconfiguring a DC microgrid with a DCSOP controlled by an agent, proving that the agent-based system can effectively control the DCSOP device for reconfiguration and voltage regulation.

Keywords: DC distribution networks; soft open points; microgrids; reconfiguration; DC–DC power converters; power electronics; power system reliability; smart grids; distributed control; intelligent agents (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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