Virtual Inertia: Current Trends and Future Directions
Ujjwol Tamrakar,Dipesh Shrestha,Manisha Maharjan,Bishnu P. Bhattarai,Timothy M. Hansen,Reinaldo Tonkoski +5 more
TLDR
In this article, the authors present a literature review of the current state-of-the-art of virtual inertia implementation techniques and explore potential research directions and challenges, and discuss several research needs, especially for systems level integration of VINs.Abstract:
The modern power system is progressing from a synchronous machine-based system towards an inverter-dominated system, with large-scale penetration of renewable energy sources (RESs) like wind and photovoltaics. RES units today represent a major share of the generation, and the traditional approach of integrating them as grid following units can lead to frequency instability. Many researchers have pointed towards using inverters with virtual inertia control algorithms so that they appear as synchronous generators to the grid, maintaining and enhancing system stability. This paper presents a literature review of the current state-of-the-art of virtual inertia implementation techniques, and explores potential research directions and challenges. The major virtual inertia topologies are compared and classified. Through literature review and simulations of some selected topologies it has been shown that similar inertial response can be achieved by relating the parameters of these topologies through time constants and inertia constants, although the exact frequency dynamics may vary slightly. The suitability of a topology depends on system control architecture and desired level of detail in replication of the dynamics of synchronous generators. A discussion on the challenges and research directions points out several research needs, especially for systems level integration of virtual inertia systems.read more
Citations
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Microgrid Stability Definitions, Analysis, and Examples
Mostafa Farrokhabadi,Dimitris T. Lagos,Richard W. Wies,Mario Paolone,Marco Liserre,Lasantha Meegahapola,Mahmoud Kabalan,Amir H. Hajimiragha,Dario Peralta,Marcelo A. Elizondo,Kevin P. Schneider,Claudio A. Canizares,Francis K. Tuffner,Jim Reilly,John W. Simpson-Porco,Ehsan Nasr,Lingling Fan,Patricio Mendoza-Araya,Reinaldo Tonkoski,Ujjwol Tamrakar,Nikos Hatziargyriou +20 more
TL;DR: In this paper, definitions and classification of microgrid stability are presented and discussed, considering pertinent microgrid features such as voltage-frequency dependence, unbalancing, low inertia, and generation intermittency.
Journal ArticleDOI
Future low-inertia power systems: Requirements, issues, and solutions - A review
TL;DR: This study reviews the various control techniques and technologies that offset a decrease in inertia and discusses the inertia emulation control techniques available for inverters, wind turbines, photovoltaic systems, and microgrid.
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Evolution of microgrids with converter-interfaced generations: Challenges and opportunities
TL;DR: A comprehensive list of challenges and opportunities supported by a literature review on the evolution of converter-based microgrids is presented, describing the challenges and benefits of using DG units in a distribution network and then those of microgrid ones.
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Power System Resilience: Current Practices, Challenges, and Future Directions
TL;DR: This paper provides a comprehensive and critical review of current practices of power system resilience metrics and evaluation methods and discusses future directions and recommendations to contribute to the development of universally accepted and standardized definitions, metrics, evaluation methods, and enhancement strategies.
Journal ArticleDOI
Enhanced Virtual Inertia Control Based on Derivative Technique to Emulate Simultaneous Inertia and Damping Properties for Microgrid Frequency Regulation
Thongchart Kerdphol,Fathin Saifur Rahman,Masayuki Watanabe,Yasunori Mitani,Dirk Turschner,Hans-Peter Beck +5 more
TL;DR: A novel design and analysis of virtual inertia control to imitate damping and inertia properties simultaneously to the microgrid, enhancing frequency performance and stability and the efficiency and robustness are compared with the conventional inertia control.
References
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Overview of Control and Grid Synchronization for Distributed Power Generation Systems
TL;DR: An overview of the structures for the DPGS based on fuel cell, photovoltaic, and wind turbines is given and the possibility of compensation for low-order harmonics is discussed.
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Vehicle-to-grid power fundamentals: Calculating capacity and net revenue
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Synchronverters: Inverters That Mimic Synchronous Generators
Qing-Chang Zhong,George Weiss +1 more
TL;DR: The idea of operating an inverter to mimic a synchronous generator (SG) is motivated and developed, and the inverters that are operated in this way are called synchronverters.