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Special Issue "HVDC/FACTS for Grid Services in Electric Power Systems"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Electrical Power and Energy System".

Deadline for manuscript submissions: 1 July 2019

Special Issue Editors

Guest Editor
Prof. Dr. Jose Maria Maza Ortega

Department of electrical engineering, University of Seville, 4 San Fernando Str. Sevilla 41004, Spain
Website | E-Mail
Interests: management of electric energy; efficient management of electric energy; electrical machines; electric energy systems; quality and efficiency of power supply; AC/DC devices and systems
Guest Editor
Prof. Dr. Antonio Gomez-Exposito

Department of Electrical Engineering, University of Seville, 4 San Fernando Str. Sevilla 41004, Spain
Website | E-Mail
Interests: circuit theory; electrical power systems; transient and dynamic analysis of electrical systems; operation and control of electrical systems; electric power systems II; transient and dynamic analysis of electrical systems; AC/DC devices and systems; numerical methods for electrical systems; operation and control of electrical systems

Special Issue Information

Dear Colleagues,

Electric power systems are headed for a true changing of the guard due to the urgent need for decarbonized and sustainable energy delivery. Fortunately, the development of new technologies is driving the transition of power systems towards a carbon-free paradigm, while at the same time maintaining current standards of quality, efficiency and resiliency. The introduction of HVDC and FACTS in the 20th century, taking advantage of dramatic improvements in power electronics and control, gave rise to unprecedented levels of flexibility and speed of response in comparison with traditional electromechanical devices. This flexibility is nowadays more required than ever in order to solve a puzzle with pieces that do not always fit perfectly.

This Special Issue aims to address the role that FACTS and HVDC systems can play in helping electric power systems face the challenges of the near future. The contributions should preferably focus on the grid services that these technologies may bring, rather than on advances in individual devices. The topics of interest include, but are not limited to:

  • HVDC/FACTS providing services for transmission systems in combination with renewable plants and/or storage systems: frequency control, var/voltage regulation, backup reserve, energy imbalance, inertia provision, congestion release, load following, black-start capability, remote automatic generation control, network loss reduction, emergency control action, etc.
  • MVDC/D-FACTS providing services for distribution systems in combination with distributed generation and storage: voltage control, reactive power support, supply restoration, power quality maintenance, congestion management, balancing and reconfiguration, integration of renewable energies, etc.
  • Application of innovative devices or concepts based on HVDC/FACTS technologies for providing grid services: advanced secondary substations involving custom power devices, hybrid AC/DC transmission and distribution systems, advanced charging stations for electric vehicles, etc.
  • Advanced control systems for HVDC/FACTS providing grid services: centralized and distributed approaches, coordinated controllers with minimal communication infrastructure, robust controllers, etc.

Prof. Dr. Jose Maria Maza Ortega
Prof. Dr. Antonio Gomez-Exposito
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 1800 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.

Keywords

  • HVDC
  • FACTS
  • Ancillary services
  • Decarbonized power systems

Published Papers (2 papers)

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Research

Open AccessArticle
Reactive Power Compensation and Imbalance Suppression by a Star-Connected Buck-Type D-CAP
Energies 2019, 12(10), 1914; https://doi.org/10.3390/en12101914
Received: 5 March 2019 / Revised: 10 May 2019 / Accepted: 16 May 2019 / Published: 18 May 2019
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Abstract
Reactive power and negative-sequence current generated by inductive unbalanced load will not only increase line loss, but also cause the malfunction of relay protection devices triggered by a negative-sequence component in the power grid, which threatens the safe operation of the power system, [...] Read more.
Reactive power and negative-sequence current generated by inductive unbalanced load will not only increase line loss, but also cause the malfunction of relay protection devices triggered by a negative-sequence component in the power grid, which threatens the safe operation of the power system, so it is particularly important to compensate reactive power and suppress load imbalance. In this paper, reactive power compensation and imbalance suppression by a three-phase star-connected Buck-type dynamic capacitor (D-CAP) under an inductive unbalanced load are studied. Firstly, the relationship between power factor correction and imbalance suppression in a three-phase three-wire system is discussed, and the principle of D-CAP suppressing load imbalance is analyzed. Next, its compensation ability for negative-sequence currents is determined, which contains theoretical and actual compensation ability. Then an improved control strategy to compensate reactive power and suppress imbalance is proposed. If the load is slightly unbalanced, the D-CAP can completely compensate the reactive power and negative-sequence currents. If the load is heavily unbalanced, the D-CAP can only compensate the positive-sequence reactive power and a part of the negative-sequence currents due to the limit of compensation ability. Finally, a 33 kVar/220 V D-CAP prototype is built and experimental results verify the theoretical analysis and control strategy. Full article
(This article belongs to the Special Issue HVDC/FACTS for Grid Services in Electric Power Systems)
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Open AccessArticle
Active and Reactive Power Compensation Control Strategy for VSC-HVDC Systems under Unbalanced Grid Conditions
Energies 2018, 11(11), 3140; https://doi.org/10.3390/en11113140
Received: 23 October 2018 / Revised: 5 November 2018 / Accepted: 8 November 2018 / Published: 13 November 2018
Cited by 1 | PDF Full-text (5826 KB) | HTML Full-text | XML Full-text
Abstract
This paper presents a power compensation strategy to suppress the double frequency power ripples of Voltage source converter high-voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions. The mathematical control equations of the double frequency ripple power of VSC under unbalanced operating [...] Read more.
This paper presents a power compensation strategy to suppress the double frequency power ripples of Voltage source converter high-voltage direct current (VSC-HVDC) systems under unbalanced grid voltage conditions. The mathematical control equations of the double frequency ripple power of VSC under unbalanced operating conditions are firstly derived and established, where the dynamic behaviors of the double frequency ripples in active and reactive power are regarded as being driven by current-relevant components and voltage-relevant components, respectively. Based on the equations, a power compensation control strategy of VSC-HVDC is proposed via the passivity-based control with disturbance observer to suppress both the current-relevant and voltage-relevant components in the power ripples. With this control strategy, the double frequency ripples in active and reactive power are suppressed simultaneously and system performance is significantly enhanced with the implementation of the disturbance observer in the passivity-based control. Theoretical stability analysis and simulation cases show the effectiveness and superiority of the proposed strategy. Full article
(This article belongs to the Special Issue HVDC/FACTS for Grid Services in Electric Power Systems)
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