EPE Association: EPE 2023 - LS2a: Focus Topic 2

EPE 2023 - LS2a: Focus Topic 2 - Energy Islands
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 11: Focus Topics > EPE 2023 - LS2a: Focus Topic 2 - Energy Islands

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   Impedance-Based Stability Analysis of Droop-Controlled AC Microgrids with the Generalized Nyquist Criterion
By Robin STRUNK, Axel MERTENS [View]
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Abstract: An impedance model of a droop-controlled inverter is derived analytically. The cross-coupling between a distortion frequency and its mirrored frequency component is considered. This requires the impedance to be modeled as a MIMO system. An impedance-based stability analysis of a microgrid with two grid-forming inverters is performed. The results are validated by a laboratory test. This shows how high droop coefficients can deteriorate the stability of a mircogrid and that the instability can be predicted with the analytic model.

   Planning of Community Microgrid for Improving the Resilience of System by using HOMER Grid
By Majid ALI, Rajabnia MEISAM, Vasquez JUAN C., Guerrero JOSEP M., Guan YAJUAN, Abusorrah ABDULLAH M. [View]
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Abstract: Natural Disasters (NDs), such as tsunamis, floods, and earthquakes, may cause damage to the transmission and distribution infrastructures as well as communication systems. In these situations, generators may even be intentionally shut down for security reasons. The result is a major power outage or a blackout, which may disrupt industrial production, disturb commercial and household activities and imperil human lives. Contrary to large-scale power systems, Micro Grids (MGs) may offer a higher resilience to NDs because of their compact sizes, manageable loads, and constrained bounds. Such an MG may include Photo-Voltaic (PV) system, Battery Energy Storage (BES) system, winds turbine, diesel generators, and local electric loads. It operates in grid-connected in normal conditions, and in islanded mode during NDs, ensuring that no disruption in the supply of critical loads happens. The main objective of this article is to study the planning of Community MG (CMG) for hospital loads to ensure high resilience against NDs. Hospital loads in the Northwest Lombok region of Indonesia are considered as the case study. The goal is to achieve three days of uninterruptible power supply during NDs. HOMER Grid carries out the simulation research. According to the results, the planned CMG could provide the necessary hospital load during the intended time period without any interruptions.

   Rule-Based Bottom-Up Medium Voltage AC Microgrid Black Start through Battery Energy Storage System with Transformer Inrush Current Management
By César CASTELO BRANCO, Luiz RIBEIRO, José DE MATOS, Hercules OLIVEIRA, Lucas PINHEIRO [View]
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Abstract: This paper proposes a rule-based bottom-up procedure for solving an energy management practical challenge, namely, medium voltage microgrid black start with battery energy storage system as restoration unit. The aim is to reduce the phenomenon of transformer inrush currents due energization. Experimental results from tests performed on a real medium voltage microgrid show the applicability of the proposed procedure.

EPE 2023 - LS2a: Focus Topic 2 - Energy Islands
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 11: Focus Topics > EPE 2023 - LS2a: Focus Topic 2 - Energy Islands
	[return to parent folder]

	Impedance-Based Stability Analysis of Droop-Controlled AC Microgrids with the Generalized Nyquist Criterion By Robin STRUNK, Axel MERTENS	[View] [Download]
Abstract: An impedance model of a droop-controlled inverter is derived analytically. The cross-coupling between a distortion frequency and its mirrored frequency component is considered. This requires the impedance to be modeled as a MIMO system. An impedance-based stability analysis of a microgrid with two grid-forming inverters is performed. The results are validated by a laboratory test. This shows how high droop coefficients can deteriorate the stability of a mircogrid and that the instability can be predicted with the analytic model.

	Planning of Community Microgrid for Improving the Resilience of System by using HOMER Grid By Majid ALI, Rajabnia MEISAM, Vasquez JUAN C., Guerrero JOSEP M., Guan YAJUAN, Abusorrah ABDULLAH M.	[View] [Download]
Abstract: Natural Disasters (NDs), such as tsunamis, floods, and earthquakes, may cause damage to the transmission and distribution infrastructures as well as communication systems. In these situations, generators may even be intentionally shut down for security reasons. The result is a major power outage or a blackout, which may disrupt industrial production, disturb commercial and household activities and imperil human lives. Contrary to large-scale power systems, Micro Grids (MGs) may offer a higher resilience to NDs because of their compact sizes, manageable loads, and constrained bounds. Such an MG may include Photo-Voltaic (PV) system, Battery Energy Storage (BES) system, winds turbine, diesel generators, and local electric loads. It operates in grid-connected in normal conditions, and in islanded mode during NDs, ensuring that no disruption in the supply of critical loads happens. The main objective of this article is to study the planning of Community MG (CMG) for hospital loads to ensure high resilience against NDs. Hospital loads in the Northwest Lombok region of Indonesia are considered as the case study. The goal is to achieve three days of uninterruptible power supply during NDs. HOMER Grid carries out the simulation research. According to the results, the planned CMG could provide the necessary hospital load during the intended time period without any interruptions.

	Rule-Based Bottom-Up Medium Voltage AC Microgrid Black Start through Battery Energy Storage System with Transformer Inrush Current Management By César CASTELO BRANCO, Luiz RIBEIRO, José DE MATOS, Hercules OLIVEIRA, Lucas PINHEIRO	[View] [Download]
Abstract: This paper proposes a rule-based bottom-up procedure for solving an energy management practical challenge, namely, medium voltage microgrid black start with battery energy storage system as restoration unit. The aim is to reduce the phenomenon of transformer inrush currents due energization. Experimental results from tests performed on a real medium voltage microgrid show the applicability of the proposed procedure.