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324 results on '"Ghosh, Arindam"'

19. A Robust Controller for Battery Energy Storage System of an Islanded AC Microgrid.

Author

Som, Shreyasi, De, Souradip, Chakrabarti, Saikat, Sahoo, Soumya Ranjan, and Ghosh, Arindam

Abstract

A battery energy storage system (BESS) can play a critical role in regulating system frequency and voltage in an islanded microgrid. A $\mu$ -synthesis-based robust control has been proposed for dc link voltage regulation of BESS for achieving frequency regulation and voltage quality enhancement of islanded microgrid. Variation in the operating condition of ac microgrid affects the operating condition of the BESS’ converter. This controller synthesis accounts for such uncertain variations as parametric uncertainty. The stability and performance of the proposed controller can be guaranteed for bounded parametric variations. The bounds on parameters are selected based on practical limitations of BESS. In this article, the proposed controller's performance is tested on an islanded CIGRE TF C6:04:02 benchmark low voltage ac microgrid system. The importance of dc link voltage regulation is analyzed based on performance comparison with a benchmark controller. The controller performance is also validated using a real-time Typhoon HIL emulator. [ABSTRACT FROM AUTHOR]

Published
2022
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33. Online Centralized Coordination of Charging and Phase Switching of PEVs in Unbalanced LV Networks With High PV Penetrations.

Author

Jabalameli, Nasim and Ghosh, Arindam

Abstract

The next decade is likely to witness considerable growth in the application of plug-in electric vehicles (PEVs). However, uncoordinated PEV charging in low-voltage distribution networks may cause grid issues, such as transformer overload and voltage unbalance (VU). Therefore, it is essential to consider a more suitable methodology of voltage regulation for the consumers placed at the end of the feeder when the network is predominantly resistive. With this background, this article investigates the capability of dynamic PEV load transfer within the three phases of a distribution network to propose a new hybrid PEV coordination approach. In addition to the online centralized battery charging and var discharging, this approach performs local voltage profiles improvement by switching PEV at selected single-phase residential houses such that a PEV can be switched from a heavily loaded phase to a (relatively) lightly loaded phase. This results in better voltage regulations and VU reductions. The impacts of uncoordinated and proposed genetic algorithm (GA) coordinated PEV charging on VU and node voltage profiles and losses are simulated for a real unbalanced Western Australian distribution network in the Perth solar city over 24 h. [ABSTRACT FROM AUTHOR]

Published
2021
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34. Gate-Controllable Electronic Trap Detection in Dielectrics.

Author

Mondal, Sandip, Paul, Tathagata, Ghosh, Arindam, and Venkataraman, V.

Subjects
DIELECTRICS, DIELECTRIC films, INDIUM gallium zinc oxide, METAL insulator semiconductors, CONDUCTION bands, DIELECTRIC measurements
Abstract

Gate controllable electronic trap detection method has been demonstrated by regulating the gate potential of MIS devices. This method is based on shift of capacitance–voltage (CV) curve as well as flatband voltage (VFB) measure in < 10 μs due to injection or ejection of electrons through the metal gate. Using this method, an electronic trap energy distribution was measured in the HfO2 dielectric film and it confirms a maximum number of traps (Δ NT) of 1.7 × 1012 cm-2 corresponding to an energy level (Δ EIL) of 0.45 eV above silicon conduction band (Si-ECB). In comparison, ZrO2-based MIS devices showed a broader distribution of electronic traps throughout the band gap. However, HfO2 contained more than 60% traps in deep level compared to 50% in ZrO2, which establishes the effects of material variation. [ABSTRACT FROM AUTHOR]

Published
2020
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49. A DC Power Exchange Highway Based Power Flow Management for Interconnected Microgrid Clusters.

Author

John, Blessy, Ghosh, Arindam, Goyal, Megha, and Zare, Firuz

Abstract

In this paper, the concept of dc power exchange highway (DCPEH) is introduced to interconnect a cluster of ac microgrids (MGs) to facilitate an efficient and resilient energy system. A power flow controller is proposed to manage the power flow between an MG and DCPEH, based on local load demand, surplus power, and power shortfall of an individual MG. This control integrated with DCPEH will improve the resiliency and reliability of MG clusters by utilizing the maximum available power from uncertain distributed energy resources (DERs) like solar or wind energy conversion systems in individual MGs. Each MG is connected to the DCPEH through an active front-end converter and a storage capacitor. The converter holds the dc voltage at a pre-defined value. A dynamic droop control for the DCPEH is adopted to effectively distribute the power demand between MGs. In this paper, it has been assumed that the cluster operates autonomously with the presence of a utility grid. It has been further assumed that the MGs are dominated by converter interfaced DERs, and hence, the power sharing is performed using angle droop control. To verify the efficacy of the interconnected MG clusters using DCPEH, various simulation studies are conducted using power system computer aided design electro magnetic transient design and control. [ABSTRACT FROM AUTHOR]

Published
2019
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50. Networked Microgrids: State-of-the-Art and Future Perspectives.

Author

Alam, Mahamad Nabab, Chakrabarti, Saikat, and Ghosh, Arindam

Abstract

The operation of multiple microgrids (MGs) in coordination with distribution system enables high penetration of locally available distributed energy resources (DERs). This approach enhances the reliability and resiliency of the power supply significantly. Also, the overall cost of energy gets reduced because of the integration of cost-free power from photovoltaic panels and wind turbines. The most effective utilization of DERs can be achieved through networked MGs. However, the implementation of the concepts of networked MGs requires extensive research. This paper presents a comprehensive literature review of the most important research works on networked MGs. Major benefits and challenges related to this new and highly exploring area have been analyzed. Also, some of the most important research areas related to networked MGs have been highlighted and discussed as the future perspectives. [ABSTRACT FROM AUTHOR]

Published
2019
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