Planning and Design of Medium Voltage DC Grids– An Overview

Priebe, Jens; Wehbring, Niklas; Moser, Albert

doi:10.1109/upec.2018.8541919

Cited by 11 publications

(1 citation statement)

References 18 publications

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“…in mobility sector and temperature control of buildings), toughens criticalities related to power quality, protection and control of power flow; the upgrade of networks with power electronics components, based on DC technology, could mitigate these issues [1], [2]. Particularly, several research activities propose the deployment of pointto-point or multi-terminal DC lines, linking DC-based generators and loads via DC-DC converters, to interconnect AC distribution grids [3]- [5]. To achieve this grid configuration, [6] and [7] analyze the conversion of AC lines to DC lines for Medium Voltage (MV) networks, enhancing the power distribution in different network conditions.…”

Section: Introductionmentioning

confidence: 99%

Service Restoration of AC–DC Distribution Grids Based on Multiple-Criteria Decision Analysis

et al. 2023

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Modern distribution grids are transforming due to the increasing amount of load and generation based on DC technologies, whose interconnection is facilitated by the upcoming AC-DC distribution networks. Their fault management is challenged by new issues related to the power transferred among AC and DC sub-networks. In light of this, the present paper proposes a novel Service Restoration (SR) algorithm, specifically tailored for AC-DC distribution grids, that optimizes the re-energization by establishing priorities of disconnected bus groups and computing, as candidate solutions, hierarchical combinations of normally open and normally closed switches. To overcome the limitations of existing approaches, a Multiple Criteria Decision Analysis (MCDA) is proposed to combine and objectively prioritize different SR goals (i.e., the use of telecontrolled switches, the minimization of power losses, and the applicability of the proposed solutions in a defined time horizon), and ultimately make the grid operator benefit from the possibility to flexibly tune different operational objectives. The proposed algorithm allows to effectively discriminating competing solutions, i.e. whence and how to re-energize disconnected buses, and complies with the time requirements for field implementation. The results prove the crucial role of DC sub-networks, associated to the control of power injection from AC-DC converters, in enhancing the SR by improving its targets and increasing the number of re-energized loads. Ultimately, the effect of MCDA comparison parameters on the SR outcomes is quantitatively investigated via global sensitivity analysis, whose adoption is recommended for supporting the grid operator in the algorithm implementation.

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