Special Issue "Resilient and Flexible Energy Systems"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "C: Energy and Environment".

Deadline for manuscript submissions: 31 December 2021.

Special Issue Editor

Prof. Dr. Ali Elkamel
E-Mail Website
Guest Editor

Special Issue Information

Dear Colleagues,

Today’s multienergy systems embody various energy vectors such as electricity, gas, and heat whose simultaneous operation represents a valuable source of demand-side flexibility. This flexibility provides an appropriate opportunity to address the concerns of the energy system outages that occur due to climate change, natural hazards, technical problems, and cyber-attacks. The outages cause several challenges and problems for industries, commercial and residential sectors, and public services. Therefore, flexibility and resiliency enhancement of today’s modern energy systems have recently received more attention by scientists and researchers. However, resilience enhancement needs huge investment costs if traditional methods are utilized. Therefore, new techniques and approaches, such as integration of multiple energy hubs to accommodate more renewable energies, island operation of energy hubs, and utilization of advanced technologies such as remote controlled switches, are necessary to increase the resiliency and flexibility of today’s energy systems. On the other hand, as today’s energy systems contain several downstream microenergy hubs, resilience improvement in local multi-energy hubs will be more beneficial than improvements at the national level. Smart control of microenergy hubs, in both islanded and grid-connected operation modes that contain different energy resources, thermal and electrical energy storage systems, electric vehicles, and demand response programs, will significantly increase the resilience of the modern energy systems. As a result, comprehensive studies are necessary to investigate the resiliency and flexibility of today’s modern energy systems.

The purpose of this Special Issue is to provide an opportunity for researchers to present new solutions to increase the resilience and flexibility of modern energy systems.  

Topics of interest include but are not limited to:

  • Flexibility analysis of energy hubs and multiple energy hubs;
  • Suppression of uncertainties and fluctuations in distributed renewable energies;
  • Integration of multiple energy hubs to increase flexibility to accommodate more renewable energies;
  • High-impact low-probability disruptive events;
  • Advanced technologies for resilience enhancement;
  • Operation and planning of multienergy hubs;
  • Support decarburization by improvement of energy systems’ flexibility;
  • Transportation electrification impact on resilience and flexibility;
  • Local energy control and management strategies;
  • System resilience in natural hazard conditions;
  • Flexibility improvement by distribution network reconfiguration;
  • Impact of high penetration of renewable energies on system resiliency;
  • Post-restoration state analysis;
  • Infrastructures recovery analysis;
  • Demand response programs impact on system resiliency.

Prof. Dr. Ali Elkamel
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2000 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.


  • resilience
  • multiple energy hubs
  • vulnerability
  • distributed renewable energies
  • risk management
  • flexibility
  • smart energy systems
  • multienergy microgrid
  • robustness
  • rapid recovery
  • restoration
  • redundancy and adaptability

Published Papers (1 paper)

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Unbalanced Current Reduction Method of Microgrid Based on Power Conversion System Operation
Energies 2021, 14(13), 3862; https://0-doi-org.brum.beds.ac.uk/10.3390/en14133862 - 27 Jun 2021
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In isolated areas such as islands with small power grids, the BESS (Battery energy storage system) can supply the standard voltage and frequency to the power system to achieve 100% of renewable sharing. In addition, the installation of additional BESS may be required [...] Read more.
In isolated areas such as islands with small power grids, the BESS (Battery energy storage system) can supply the standard voltage and frequency to the power system to achieve 100% of renewable sharing. In addition, the installation of additional BESS may be required in the microgrid due to technical limitations such as redundant operation and manufacturer specifications. Thus, the BESSs in a microgrid can be split into main and sub BESSs which play a role as the main source and auxiliary services, respectively. Generally, the ratio of unbalance current in microgrid system tends to be high, because of inherently unbalanced single phase load distribution. However, because the capacity of BESS is calculated under balanced conditions, the PCS (Power conversion system) of BESS may stop protecting its switching device from a single phase overcurrent in actual operation. From this perspective, this paper proposes that the sub BESSs perform dual current control to supply the unbalanced current instead of the main BESS. In the simulation result of the proposed method, the current unbalance rate of the main ESS has been reduced by about 26%. Through the proposed control scheme, it is possible to prevent an unexpected single phase overload of the main BESS in the microgrid. Full article
(This article belongs to the Special Issue Resilient and Flexible Energy Systems)
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