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High Voltage Direct Current Transmission for Grid Services in Electric...
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High Voltage Direct Current Transmission for Grid Services in Electric Power Systems II

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (20 January 2021) | Viewed by 4716

Special Issue Editors

Prof. Dr. Gilsoo Jang

E-Mail Website
Guest Editor
School of Electrical Engineering, Korea University, Seoul 136-713, Korea
Interests: HVDC control; transient stability; HVDC system planning
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Kyeon Hur

E-Mail Website
Guest Editor
School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-749, Republic of Korea
Interests: modular multilevel converter (MMC) for HVDC, FACTS modeling and control; synchrophasor applications: monitoring, analysis, and control towards smart TS; power system dynamic performance modeling; hybrid energy storage systems for integrating variable generation and controllable loads; power quality solutions
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are inviting submissions of original research to a Special Issue of Applied Science on the subject of “HVDC for Grid Services in Electric Power Systems”.

The modern electric power system has evolved into a huge nonlinear complex system, due to the interconnection of thousands of generation and transmission systems. The unparalleled growth of renewable energy resources (RES) has caused significant concern regarding grid stability and power quality, and it is essential to find ways to control such a massive system for reliable and effective operation. The controllability of HVDC and FACTs devices allows for improvement of the dynamic behavior of grids and their flexibility to successfully integrate increasing RES.

This Special Issue thus aims to address recent advances in control and protection technologies for HVDC grids, ranging from converter design to grid control and protection strategies. The topics of interest include but are not limited to:

  • Emerging control and protection performance requirements for reliable and resilient HVDC grid; Untapped functionalities or grid services of HVDC converters for reliable and economic AC and DC power grids operations;
  • HVDC topology and converter design; practical issues and solutions in designing the converters for various applications, for example, topology, parameter selection, control methods, and architecture to meet the operational requirements and handle complexity HVDC grid imposes;
  • Coordinated system controls and protection for future AC/DC power grid; coordinated control and protection strategies for multi-infeed and multiterminal HVDC grid, coordinated controls for VSC-LCC hybrid interconnections or infeed, coordinated controls for HVDC grids with large scale renewables and distributed energy resources, including storage;
  • Grid restoration strategies with renewable generators and HVDC controls;
  • Advanced modeling, analysis, and simulation technologies to improve the utility planning and operational practices for HVDC grid;
  • Advanced communication and network, and cybersecurity concerns to ensure HVDC grid dependability and security.

Prof. Dr. Gilsoo Jang
Prof. Dr. Kyeon Hur
Guest Editors

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 submissions that pass pre-check are 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. Applied Sciences 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 2400 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

  • Control, operation, and planning of HVDC systems
  • Active control of HVDC systems
  • HVDC control for special protection systems
  • HVDC operation scheme for stability improvement
  • Intelligent strategies for HVDC voltage support
  • New control techniques in HVDC
  • New HVDC applications
  • HVDC protection schemes

Published Papers (2 papers)

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Research

19 pages, 3323 KiB  
Article
Coordinated Control Strategy of CU-MTDC under Abnormal Conditions Considering Power Supply Security
by Zhuodi Wang, Kejun Li, Jun Liang, Kaiqi Sun, Jinyu Wang and Zhijie Liu
Appl. Sci. 2021, 11(4), 1539; https://doi.org/10.3390/app11041539 - 08 Feb 2021
Cited by 1 | Viewed by 1308
Abstract
The coastal urban multi-terminal DC (CU-MTDC) is a prospective solution for enhancing the power supply security of the coastal urban power (CUP) grid and integrating the large-scale offshore wind farm. However, the large DC disturbances may significantly impact the CUP power supply security. [...] Read more.
The coastal urban multi-terminal DC (CU-MTDC) is a prospective solution for enhancing the power supply security of the coastal urban power (CUP) grid and integrating the large-scale offshore wind farm. However, the large DC disturbances may significantly impact the CUP power supply security. The existing DC unbalanced power distribution methods are difficult to be applied in the CU-MTDC because of the complicated optimization process and the expansion of the influence range of a DC fault. To solve the above problems, this paper proposes a coordinated control strategy of CU-MTDC under abnormal conditions. First, calculation principles for the active power reference of center coastal urban power (CCUP) grid converters are proposed. Second, a DC unbalanced power coordinated distribution strategy under abnormal conditions is used based on the dynamic priority control to ensure power supply security of the critical AC lines. Third, the controller parameters of CCUP grid converters are calculated. Through a simple control process, the number of the regulation converters is dynamically scheduled according to the DC unbalanced power. The DC fault influence range on the urban power grid can be limited in a sufficiently small area. Simulation verified the effectiveness of the proposed control strategy. Full article
(This article belongs to the Special Issue High Voltage Direct Current Transmission for Grid Services in Electric Power Systems II)
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19 pages, 1010 KiB  
Article
Improved Control Strategy of MMC–HVDC to Improve Frequency Support of AC System
by Zicong Zhang, Junghun Lee and Gilsoo Jang
Appl. Sci. 2020, 10(20), 7282; https://doi.org/10.3390/app10207282 - 18 Oct 2020
Cited by 7 | Viewed by 2537
Abstract
With the continuous development of power electronics technology, variable-speed offshore wind turbines that penetrated the grid system caused the problem of inertia reduction. This study investigates the frequency stability of synchronous, offshore wind-farm integration through a modular-multilevel-converter high-voltage direct-current (MMC–HVDC) transmission system. When [...] Read more.
With the continuous development of power electronics technology, variable-speed offshore wind turbines that penetrated the grid system caused the problem of inertia reduction. This study investigates the frequency stability of synchronous, offshore wind-farm integration through a modular-multilevel-converter high-voltage direct-current (MMC–HVDC) transmission system. When full-scale converter wind turbines (type 4) penetrate the AC grid, the AC system debilitates, and it becomes difficult to maintain the AC system frequency stability. In this paper, we present an improved inertial-response-control method to solve this problem. The mathematical model of the synchronous generator is based on the swing equation and is theoretically derived by establishing a MMC–HVDC. Based on the above model, the inertia constant is analyzed using a model that integrates the MMC–HVDC and offshore synchronous generator. With the new improved control method, a more sensitive and accurate inertia index can be obtained using the formula related to the effective short-circuit ratio of the AC system. Moreover, it is advantageous to provide a more accurate inertial control evaluation for AC systems under various conditions. Furthermore, the impact of the MMC–HVDC on system safety is assessed based on the capacitor time constant. This simulation was implemented using the PSCAD/EMTDC platform. Full article
(This article belongs to the Special Issue High Voltage Direct Current Transmission for Grid Services in Electric Power Systems II)
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