Investigations on Issues in Microgrids

Gaur, Prerna; Singh, Sunita

doi:10.18178/jocet.2017.5.1.342

Cited by 32 publications

(16 citation statements)

References 12 publications

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“…12 Enhancement in quality of power and reliability can be brought about by decentralizing the supply and by maintaining proper ratio between the demand and the supply. 13 Further quality of power can be enhanced by reducing generation and transmission outages, downtimes, and enhancing the restoring process by the black start operations of microsources.…”

Section: Stability and Power Quality In Mgsmentioning

confidence: 99%

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

Choudhury

2020

Int Trans Electr Energ Syst

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Summary Recent researches in electrical grids and networks fraternity are directed toward the integration of Microgrid (MG) technologies across the consumer's end. Nowadays, conventional power grid networks are obsolete due to its difficulty of control and protection when many numbers of distributed generations are used. MGs thus acts as a viable solution replacing the conventional grid as it provides integrating platform for Microsources, loads, Electrical Energy Storage Devices and Power Electronic Devices at the demand end within a small locality. MGs are capable of operating either in grid connected or autonomous mode of operation during a faulted situation. However, the system's stability, reliability, and operational control is of extreme concern basically during the islanded mode of operation. Regardless of that, very notable real time implementation and commercial use of MGs are yet to be deployed. This research article brings out a comprehensive review of various challenges and issues related to installation of MG, different controllers for power flow control, idea about the protection system, role of MGs in realizing smart grids (SGs), its major shortcomings, and future prospects.

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Section: Stability and Power Quality In Mgsmentioning

confidence: 99%

A comprehensive review on issues, investigations, control and protection trends, technical challenges and future directions for Microgrid technology

Choudhury

2020

Int Trans Electr Energ Syst

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“…Inherently there is a concern of power imbalance during transition from grid-connected to islanded mode in the case that the microgrid is absorbing or supplying power to the grid before disconnection. In this case a high-speed switch with the proper sensing capabilities can be used to ensure synchronization [9]. In addition, a prevalent roadblock when designing and implementing a microgrid is the issue of system stability.…”

Section: 1: Composition Of a Microgridmentioning

confidence: 99%

“…Many factors are capable of contributing to the stability issues in a microgrid. For example, Gaur and Singh concluded in [9] that there is potential for low angular stability due to lower overall system inertia. System instability can additionally result from low frequency power oscillations.…”

Section: 2: Complications Within Microgridsmentioning

confidence: 99%

“…DGs sets the DG inverter for that operating condition, the MPPT for DGs is susceptible to deviations [9]. The deviations for a large number of DGs in a microgrid can reinforce one another and cause oscillations in total power generation.…”

Section: 2: Complications Within Microgridsmentioning

confidence: 99%

“…"With a large number of inverters in a microgrid, there are concerns regarding their ability to support such a small power system when it is under large stress. Such stress can be caused by voltage and frequency deviations arising inside or outside the microgrid, or from faulty situations" [9].…”

Section: 2: Complications Within Microgridsmentioning

confidence: 99%

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PSCAD Modeling and Stability Analysis of a Microgrid

Hasan¹

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As power systems are evolving, engineers are facing, and will continue to face, new challenges with respect to maintaining the system in terms of stable operation. Many different forms of generation are becoming prevalent, including; small synchronous generators, photovoltaic generation, and energy storage techniques in the form of battery and ultracapacitor systems. One of the evolutions occurring in the power system is the emergence of microgrids, small power systems capable of isolating from the major power grid in the form of islands. Microgrids use distributed generation to provide power to small communities, and they come with several advantages and disadvantages. This thesis shows the design process employed to model a microgrid, which contains a variety of distributed resources, in PSCAD, as well as investigate the transient instability of the microgrid when transitioning to islanded operation. Modeling techniques for both grid-connected and islanded operation of the microgrid are considered in this study. In addition to modeling techniques, the effectiveness of proper control of energy storage assets in a microgrid is demonstrated through the implementation and comparison between real & reactive power regulation and voltage & frequency regulation. v ACKNOWLEDGMENTS I would like to thank all of my friends and family for their endless support. I especially would like to thank a few special people. Without the help of my parents, Ken and Janie, I would not have been able to achieve many of my recent accomplishments. My brother and sister, Erik and Yvette, have always been a source of support that I am truly grateful for. Of course, much of my appreciation is owed to my loving girlfriend, Youlen, not only for her support, but for dealing with the distance along with long hours and nights spent working as I finished the Master's Program at Cal Poly. I am also highly indebted to Dr. Taufik for his guidance and support during my graduate education. Without Dr. Taufik, this Thesis would truly not have been possible.

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