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Energies
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Studies on Power System Dynamics and Stability
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Studies on Power System Dynamics and Stability

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F1: Electrical Power System".

Deadline for manuscript submissions: closed (2 June 2023) | Viewed by 8477

Special Issue Editors

Dr. Soobae Kim

E-Mail Website
Guest Editor
Department of Electrical Engineering, School of Electronic and Electrical Engineering, Kyungpook National University, Daegu, Korea
Interests: power system dynamics and stability; power system operation and control; renewable energy sources and their impacts on system stabilities; power system equivalents and model reduction; computational efficiency
Dr. Jeonghoon Shin

E-Mail Website
Guest Editor
Korea Electric Power Research Institute (KEPRI), Korea Electric Power Corporation (KEPCO), Daejeon, Korea
Interests: wide area monitoring; protection and control systems based on synchrophasor data; hierarchical voltage controls; real-time digital simulations; Integration of renewable energy resources; power system dynamics and stability

Special Issue Information

Dear Colleagues,

Electric power systems today are rapidly transitioning toward having an increasing proportion of generation from renewable energy sources. This transition from primarily using conventional rotation synchronous machine-based generation brings about various additional challenges, particularly in terms of dynamic stability issues at short timescales ranging from microseconds to seconds. The power system dynamics and stability of large synchronous generators have been studied for decades and are well understood. By contrast, the system dynamics and stability for high levels of renewable sources are less well studied. The distinct natures of renewable energy sources, including their lack of inertia and high frequency converter action, in addition to the changes in operating conditions resulting from the replacement of conventional generators will have a significant impact on power system stability. To ensure the security of the energy delivery system, rigorous studies of all forms of system instability are required.

In this light, this Special Issue invites original research papers and review articles addressing the various topics related to power system dynamics and stability, and experts in both academia and industry are encouraged to present their latest achievements. The main topics of interest for this Special Issue include but are not limited to:

  • Advances in power system dynamics and stability
  • Assessment of impacts of renewable energy sources on power system stabilities
  • Reduced transient stability margin
  • Decrease of inertia and frequency stability
  • Power electronics controller interaction and resonance
  • Power electronics interfaces and their controls
  • Effectiveness of mitigation measures 
  • Improvements in power system stability with HVDC
  • Energy storage and synchronous condensers
  • Grid forming inverters and their contribution on stabilities
  • Dynamic modeling of renewable energy sources and controls.

Dr. Soobae Kim
Dr. Jeonghoon Shin
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. 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 2600 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

  • power system dynamics
  • power system stability
  • power system operation and control
  • dynamic security assessment
  • renewable energy sources
  • power electronics
  • system inertia
  • synthetic inertia
  • high voltage direct current (HVDC) system
  • energy storage system
  • synchronous condenser
  • grid forming inverter

Published Papers (4 papers)

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Research

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12 pages, 4883 KiB  
Article
Analysis of the System Impact upon Thyristor Controlled Series Capacitor Relocation Due to Changes in the Power System Environment
by Hyun-Keun Ku, Hyuk-Il Kwon, Ji-Young Song, Seung-Chan Oh and Jeong-Hoon Shin
Energies 2023, 16(2), 722; https://0-doi-org.brum.beds.ac.uk/10.3390/en16020722 - 07 Jan 2023
Viewed by 944
Abstract
Owing to geographical and political influences, Korea has an independent electric power system and the highest density of electric power facilities in the world. Large-scale base power generation complexes are located in non-metropolitan coastal areas, while the most expensive combined cycle power plants [...] Read more.
Owing to geographical and political influences, Korea has an independent electric power system and the highest density of electric power facilities in the world. Large-scale base power generation complexes are located in non-metropolitan coastal areas, while the most expensive combined cycle power plants are operating or under construction in the metropolitan areas, which have the largest electricity demand. It has become difficult to secure a site for power plants, and the existing power transmission network is insufficient because of the additional construction of generators in existing power generation complexes, the increase in capacity of facilities, and the rapid increase in new and renewable energy. In particular, the East Coast region has a problem of transient stability for this reason, which is being addressed in advance through power generation restrictions. In addition, TCSC (Thyristor Controlled Series Capacitor) is installed and operated to expand the capacity of existing power transmission lines and improve stability in the failures of nearby high-voltage lines until new transmission lines that take more than 10 years are installed to resolve power generation restrictions. However, after the construction of a new transmission line, the efficiency of the existing TCSC is degraded, and for efficient use, it is necessary to rearrange the installation location to utilize the optimal TCSC according to changes in the configuration of the nearby power system. Moreover, a detailed analysis is needed on whether the TCSC designed according to the existing grid configuration exhibits accurate control performance even after the relocation and whether it interferes with nearby generators. In addition to the dynamic performance based on real-time simulations, it is necessary to study the control performance and interaction for this power electronic equipment. This study verified the need to change controller parameters, the interaction effect with nearby generators for stable operation, and the system effect of TCSC relocation using the same replica controller as the actual field controller, as well as RTDS (Real Time Digital Simulation) simulating the entire power transmission system. Full article
(This article belongs to the Special Issue Studies on Power System Dynamics and Stability)
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18 pages, 4965 KiB  
Article
Transient Stability Analysis of a Multi-Machine Power System Integrated with Renewables
by Ajaysekhar Agarala, Sunil S. Bhat, Arghya Mitra, Daria Zychma and Pawel Sowa
Energies 2022, 15(13), 4824; https://0-doi-org.brum.beds.ac.uk/10.3390/en15134824 - 01 Jul 2022
Cited by 9 | Viewed by 2241
Abstract
The impact on the stability of power systems is rising as the penetration level of renewable energy with sporadic natures rises rapidly on the grid. However, the impact of different types of renewable energy sources (wind, solar) and their combination on system stability [...] Read more.
The impact on the stability of power systems is rising as the penetration level of renewable energy with sporadic natures rises rapidly on the grid. However, the impact of different types of renewable energy sources (wind, solar) and their combination on system stability varies even with the same penetration level. This paper concentrates mainly on the stability analysis of multi-machine systems connected to various types of renewable energy sources. The study presents a simple and novel control technique named automatic reactive power support (ARS) for both single and combinations of renewable sources by injecting the available reactive power into the system during fault through converters to enhance system stability. The permanent magnet synchronous generator (PMSG) and doubly fed induction generator (DFIG) are both considered as wind generators in this paper for comparison. In addition, transient stability enhancement is carried out by improving critical clearing time of a three-phase fault in the power system. With the creation of a 3-phase fault at various buses, stability analysis is carried out on the 9-bus WSCC test bus system and also on the 68-bus IEEE test system. Comparative analysis of six test case conditions is provided and the considered cases are without renewable source, with DFIG as a wind generator, PMSG as a wind generator, solar PV farm, wind farm with DFIG and solar PV in combination and the combination of wind farm with PMSG and solar PV. Moreover, the improvement in critical clearing time of the system is compared using conventional and proposed controls with all the aforementioned renewable sources. Comparative results show that the proposed control technique improves system stability and also that the combination of renewable energy sources ought to enhance the critical clearing time of system. Full article
(This article belongs to the Special Issue Studies on Power System Dynamics and Stability)
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14 pages, 495 KiB  
Article
Synchronizing Torque-Based Transient Stability Index of a Multimachine Interconnected Power System
by Albert Poulose and Soobae Kim
Energies 2022, 15(9), 3432; https://0-doi-org.brum.beds.ac.uk/10.3390/en15093432 - 07 May 2022
Cited by 1 | Viewed by 1696
Abstract
Newly developed tools and techniques are continuously established to analyze and monitor power systems’ transient stability limits. In this paper, a model-based transient stability index for each generator is proposed from the synchronizing torque contributions of all other connected generators in a multi-machine [...] Read more.
Newly developed tools and techniques are continuously established to analyze and monitor power systems’ transient stability limits. In this paper, a model-based transient stability index for each generator is proposed from the synchronizing torque contributions of all other connected generators in a multi-machine interconnected power system. It is a new interpretation of the generator’s synchronizing torque coefficient (STC) in terms of electromechanical oscillation modes to consider the synchronizing torque interactions among generators. Thus, the system operator can continuously monitor the system’s available secured transient stability limit in terms of synchronizing torque more accurately, which is helpful for planning and operation studies due to the modal based index. Furthermore, the popular transient stability indicator critical clearing time (CCT), and the traditionally determined synchronizing torque values without other generator contributions, are calculated to verify and compare the performance of the proposed transient stability index. The simulations and test result discussions are performed over a western system coordinating council (WSCC) 9-bus and an extensive New England 68-bus large power test system cases. The open-source power system analysis toolbox (PSAT) on the MATLAB/Simulink environment is used to develop, simulate, validate and compare the proposed transient stability index. Full article
(This article belongs to the Special Issue Studies on Power System Dynamics and Stability)
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Review

Jump to: Research

30 pages, 8820 KiB  
Review
Transient Stability Analysis and Enhancement Techniques of Renewable-Rich Power Grids
by Albert Poulose and Soobae Kim
Energies 2023, 16(5), 2495; https://0-doi-org.brum.beds.ac.uk/10.3390/en16052495 - 06 Mar 2023
Cited by 2 | Viewed by 2462
Abstract
New techniques and approaches are constantly being introduced to analyze and enhance the transient stability of renewable energy-source-dominated power systems. This review article extensively discusses recent papers that have proposed novel and innovative techniques for analyzing and enhancing the renewable source-dominated power system’s [...] Read more.
New techniques and approaches are constantly being introduced to analyze and enhance the transient stability of renewable energy-source-dominated power systems. This review article extensively discusses recent papers that have proposed novel and innovative techniques for analyzing and enhancing the renewable source-dominated power system’s transient stability. The inherent low-inertia characteristics of renewable energy sources combined with fast-acting power electronic devices pose new challenges in power systems. Different stability concerns exist for grid-following and subsequent grid-forming converter/inverter connections to power grids; hence, distinct solutions for enhancing the transient stability have been devised for each. Moreover, the fundamental concepts and characteristics of converter/inverter topologies are briefly discussed in this study. Recent discussions and reviews of analysis and enhancement techniques in transient stability could lead to new ways to solve problems in power systems that rely primarily on renewable energy sources. Full article
(This article belongs to the Special Issue Studies on Power System Dynamics and Stability)
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