Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network

The two common mechanisms of load-shedding and renewable curtailment can prevent provisional overloading and excessive generation and the subsequent unacceptable voltage and frequency deviation in standalone microgrids (MGs), which makes MGs less resilient and reliable. However, instead of enabling...

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Autores principales:	S.M. Ferdous, Farhad Shahnia, GM Shafiullah
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coupled microgrids dynamic frequency regulation overload management over-generation control power exchange link power-sharing Technology T
Acceso en línea:	https://doaj.org/article/be350515c4c44632af999f0e2fc3aeef
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spelling	oai:doaj.org-article:be350515c4c44632af999f0e2fc3aeef2021-11-25T17:26:12ZPower Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network10.3390/en142275141996-1073https://doaj.org/article/be350515c4c44632af999f0e2fc3aeef2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/22/7514https://doaj.org/toc/1996-1073The two common mechanisms of load-shedding and renewable curtailment can prevent provisional overloading and excessive generation and the subsequent unacceptable voltage and frequency deviation in standalone microgrids (MGs), which makes MGs less resilient and reliable. However, instead of enabling load-shedding or renewable curtailment, such overloading or over-generation problems can be alleviated more efficiently and cost-effectively by provisionally interconnecting the neighboring MGs to exchange power amongst themselves. In such a scheme, the interconnected MGs can supply their local demand, as well as a portion of the demand of the adjacent MGs. In order to implement this strategy, a three-phase ac link can be used as the power exchange network, while each MG is coupled to the link through a back-to-back power electronics converter, in order to maintain the autonomy of each MG if they are eachoperated under different standards. This paper proposes a suitable decentralized power management strategy without a communication link between the MGs to achieve power-sharing amongst them and alleviate unacceptable voltage and frequency deviation along with the required control technique for the power electronic converters, which can be implemented at the primary level based on the measurement of the local parameters only. To this end, one of the converters should always regulate the dc link voltage while the other converter should operate in droop control mode when the MG is healthy and in constant PQ mode when overloaded or over-generating. Suitable status detection and mode transition algorithms and controllers were also developed and are proposed in this paper. The performance of the proposed power exchange and control mechanisms were evaluated and verified via PSIM<sup>®</sup>-based numerical simulation studies. The stability and sensitivity of the proposed power exchange topology are also analyzed against several critical design and operational parameters.S.M. FerdousFarhad ShahniaGM ShafiullahMDPI AGarticlecoupled microgridsdynamic frequency regulationoverload managementover-generation controlpower exchange linkpower-sharingTechnologyTENEnergies, Vol 14, Iss 7514, p 7514 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coupled microgrids dynamic frequency regulation overload management over-generation control power exchange link power-sharing Technology T
spellingShingle	coupled microgrids dynamic frequency regulation overload management over-generation control power exchange link power-sharing Technology T S.M. Ferdous Farhad Shahnia GM Shafiullah Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
description	The two common mechanisms of load-shedding and renewable curtailment can prevent provisional overloading and excessive generation and the subsequent unacceptable voltage and frequency deviation in standalone microgrids (MGs), which makes MGs less resilient and reliable. However, instead of enabling load-shedding or renewable curtailment, such overloading or over-generation problems can be alleviated more efficiently and cost-effectively by provisionally interconnecting the neighboring MGs to exchange power amongst themselves. In such a scheme, the interconnected MGs can supply their local demand, as well as a portion of the demand of the adjacent MGs. In order to implement this strategy, a three-phase ac link can be used as the power exchange network, while each MG is coupled to the link through a back-to-back power electronics converter, in order to maintain the autonomy of each MG if they are eachoperated under different standards. This paper proposes a suitable decentralized power management strategy without a communication link between the MGs to achieve power-sharing amongst them and alleviate unacceptable voltage and frequency deviation along with the required control technique for the power electronic converters, which can be implemented at the primary level based on the measurement of the local parameters only. To this end, one of the converters should always regulate the dc link voltage while the other converter should operate in droop control mode when the MG is healthy and in constant PQ mode when overloaded or over-generating. Suitable status detection and mode transition algorithms and controllers were also developed and are proposed in this paper. The performance of the proposed power exchange and control mechanisms were evaluated and verified via PSIM<sup>®</sup>-based numerical simulation studies. The stability and sensitivity of the proposed power exchange topology are also analyzed against several critical design and operational parameters.
format	article
author	S.M. Ferdous Farhad Shahnia GM Shafiullah
author_facet	S.M. Ferdous Farhad Shahnia GM Shafiullah
author_sort	S.M. Ferdous
title	Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
title_short	Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
title_full	Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
title_fullStr	Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
title_full_unstemmed	Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network
title_sort	power sharing and control strategy for provisionally coupled microgrid clusters through an isolated power exchange network
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/be350515c4c44632af999f0e2fc3aeef
work_keys_str_mv	AT smferdous powersharingandcontrolstrategyforprovisionallycoupledmicrogridclustersthroughanisolatedpowerexchangenetwork AT farhadshahnia powersharingandcontrolstrategyforprovisionallycoupledmicrogridclustersthroughanisolatedpowerexchangenetwork AT gmshafiullah powersharingandcontrolstrategyforprovisionallycoupledmicrogridclustersthroughanisolatedpowerexchangenetwork
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Power Sharing and Control Strategy for Provisionally Coupled Microgrid Clusters through an Isolated Power Exchange Network

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