Smooth Mode Transfer in AC Microgrids during Unintentional Islanding

Walid Issa; Ahmad Elkhateb; Nader Anani; Mohammad Abusara

doi:10.1016/j.egypro.2017.09.592

Smooth Mode Transfer in AC Microgrids during Unintentional Islanding

Walid Issa
, Ahmad Elkhateb
, Nader Anani
, Mohammad Abusara

School of Electronics, Electrical Engineering and Computer Science

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

342 Downloads (Pure)

Abstract

Microgrid coordinated controllers are designed so as to optimize the utilization of energy available in existing energy storage system (ESS) as well as the energy being generated from prevailing renewable energy sources (RES). If there is a surplus in the generated renewable energy, it will be used to charge the ESS if their capacity permits, otherwise, the surplus energy is curtailed. However, during a grid loss, i.e. during unintentional islanding, the surplus energy can lead to an increase in the DC link voltages feeding the DC-AC inverters, which may subsequently trip them off. Clearly, this has an adverse effect on the reliability of the microgrid. In this paper, a new strategy of microgrid control is proposed for enhancing the microgrid reliability by protecting it against unintentional islanding instability. In this strategy, the DC link voltage is used as a feedback parameter in the droop control loop. This bounds the DC link voltages and consequently leads to reliable operation. The validity of the proposed control scheme was verified by software simulations using MATLAB/Simulink.

Original language	English
Pages (from-to)	12-20
Journal	Energy Procedia
Volume	134
DOIs	https://doi.org/10.1016/j.egypro.2017.09.592
Publication status	Published - 01 Oct 2017
Event	International Conference on Sustainability in Energy and Buildings SEB-17 - Chania, Greece Duration: 05 Jul 2017 → 07 Jul 2017

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This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1016/j.egypro.2017.09.592Licence: CC BY-NC-ND

Smooth mode transfer in AC microgrids during unintentional islanding
Copyright 2017 the authors. This is an open access article published under a Creative Commons Attribution-NonCommercial-NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits distribution and reproduction for non-commercial purposes, provided the author and source are cited.
Final published version, 2.35 MBLicence: CC BY-NC-ND

Cite this

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title = "Smooth Mode Transfer in AC Microgrids during Unintentional Islanding",

abstract = "Microgrid coordinated controllers are designed so as to optimize the utilization of energy available in existing energy storage system (ESS) as well as the energy being generated from prevailing renewable energy sources (RES). If there is a surplus in the generated renewable energy, it will be used to charge the ESS if their capacity permits, otherwise, the surplus energy is curtailed. However, during a grid loss, i.e. during unintentional islanding, the surplus energy can lead to an increase in the DC link voltages feeding the DC-AC inverters, which may subsequently trip them off. Clearly, this has an adverse effect on the reliability of the microgrid. In this paper, a new strategy of microgrid control is proposed for enhancing the microgrid reliability by protecting it against unintentional islanding instability. In this strategy, the DC link voltage is used as a feedback parameter in the droop control loop. This bounds the DC link voltages and consequently leads to reliable operation. The validity of the proposed control scheme was verified by software simulations using MATLAB/Simulink.",

author = "Walid Issa and Ahmad Elkhateb and Nader Anani and Mohammad Abusara",

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AU - Issa, Walid

AU - Elkhateb, Ahmad

AU - Anani, Nader

AU - Abusara, Mohammad

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Y1 - 2017/10/1

N2 - Microgrid coordinated controllers are designed so as to optimize the utilization of energy available in existing energy storage system (ESS) as well as the energy being generated from prevailing renewable energy sources (RES). If there is a surplus in the generated renewable energy, it will be used to charge the ESS if their capacity permits, otherwise, the surplus energy is curtailed. However, during a grid loss, i.e. during unintentional islanding, the surplus energy can lead to an increase in the DC link voltages feeding the DC-AC inverters, which may subsequently trip them off. Clearly, this has an adverse effect on the reliability of the microgrid. In this paper, a new strategy of microgrid control is proposed for enhancing the microgrid reliability by protecting it against unintentional islanding instability. In this strategy, the DC link voltage is used as a feedback parameter in the droop control loop. This bounds the DC link voltages and consequently leads to reliable operation. The validity of the proposed control scheme was verified by software simulations using MATLAB/Simulink.

AB - Microgrid coordinated controllers are designed so as to optimize the utilization of energy available in existing energy storage system (ESS) as well as the energy being generated from prevailing renewable energy sources (RES). If there is a surplus in the generated renewable energy, it will be used to charge the ESS if their capacity permits, otherwise, the surplus energy is curtailed. However, during a grid loss, i.e. during unintentional islanding, the surplus energy can lead to an increase in the DC link voltages feeding the DC-AC inverters, which may subsequently trip them off. Clearly, this has an adverse effect on the reliability of the microgrid. In this paper, a new strategy of microgrid control is proposed for enhancing the microgrid reliability by protecting it against unintentional islanding instability. In this strategy, the DC link voltage is used as a feedback parameter in the droop control loop. This bounds the DC link voltages and consequently leads to reliable operation. The validity of the proposed control scheme was verified by software simulations using MATLAB/Simulink.

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T2 - International Conference on Sustainability in Energy and Buildings SEB-17

Y2 - 5 July 2017 through 7 July 2017

ER -

Smooth Mode Transfer in AC Microgrids during Unintentional Islanding

Abstract

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