Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid

C.Z. Ally; Y. Sun; E.C.W. de Jong

doi:10.1109/UPEC.2018.8541859

Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid

C.Z. Ally, Y. Sun, E.C.W. de Jong

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

9 Citations (Scopus)

Abstract

A key constraint to the penetration level or hosting capacity (HC) of PV power in ac-island power systems (IPS) is the resulting frequency volatility. Frequency volatility is directly tied to the inertia level in the grid. Since inertia-less PV power displaces synchronous generators (SG), and thereby their available rotational inertia, the inertia level is reduced and the frequency volatility increased. Frequency volatility can be quantified by the Rate of Change of Frequency (RoCoF). The RoCoF is used as a performance index to determine the HC. Virtual inertia compensation (VIR) by chemical battery storage (BESS) can increase the HC of the grid and allow for more PV power to be integrated. The impact of PI-based VIR on increasing the HC in a 17.5 MVA diesel powered IPS is studied. Results indicate that when added PV without VIR displaced SGs the RoCoF limit could not be upheld. When VIR is added the RoCoF is improved and an HC of up to 3 MW PV is obtained. For the suggested RoCoF limit of -1.45 Hz/s and the studied scenarios it is shown that, in percentage of peak load, diesel-based generation could be replaced by 25% PV, providing that 9% of BESS with VIR is added.

Original language	English
Title of host publication	Proceedings - 2018 53rd International Universities Power Engineering Conference, UPEC 2018
Place of Publication	Piscataway
Publisher	Institute of Electrical and Electronics Engineers
Number of pages	6
ISBN (Electronic)	978-1-5386-2910-9
DOIs	https://doi.org/10.1109/UPEC.2018.8541859
Publication status	Published - 20 Nov 2018
Event	53rd International Universities Power Engineering Conference (UPEC 2018) - Glasgow Caledonian University, Glasgow, United Kingdom Duration: 4 Sept 2018 → 7 Sept 2018 Conference number: 53 http://www.upec2018.com/

Conference

Conference	53rd International Universities Power Engineering Conference (UPEC 2018)
Abbreviated title	UPEC 2018
Country/Territory	United Kingdom
City	Glasgow
Period	4/09/18 → 7/09/18
Internet address	http://www.upec2018.com/

Keywords

energy storage
Frequency response
PV-diesel isolated power system
virtual inertia

UN SDGs

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

Access to Document

10.1109/UPEC.2018.8541859

Cite this

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title = "Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid",

abstract = "A key constraint to the penetration level or hosting capacity (HC) of PV power in ac-island power systems (IPS) is the resulting frequency volatility. Frequency volatility is directly tied to the inertia level in the grid. Since inertia-less PV power displaces synchronous generators (SG), and thereby their available rotational inertia, the inertia level is reduced and the frequency volatility increased. Frequency volatility can be quantified by the Rate of Change of Frequency (RoCoF). The RoCoF is used as a performance index to determine the HC. Virtual inertia compensation (VIR) by chemical battery storage (BESS) can increase the HC of the grid and allow for more PV power to be integrated. The impact of PI-based VIR on increasing the HC in a 17.5 MVA diesel powered IPS is studied. Results indicate that when added PV without VIR displaced SGs the RoCoF limit could not be upheld. When VIR is added the RoCoF is improved and an HC of up to 3 MW PV is obtained. For the suggested RoCoF limit of -1.45 Hz/s and the studied scenarios it is shown that, in percentage of peak load, diesel-based generation could be replaced by 25% PV, providing that 9% of BESS with VIR is added.",

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Ally, CZ , Sun, Y & de Jong, ECW 2018, Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid. in Proceedings - 2018 53rd International Universities Power Engineering Conference, UPEC 2018., 8541859, Institute of Electrical and Electronics Engineers, Piscataway, 53rd International Universities Power Engineering Conference (UPEC 2018), Glasgow, United Kingdom, 4/09/18. https://doi.org/10.1109/UPEC.2018.8541859

Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid. / Ally, C.Z.; Sun, Y.; de Jong, E.C.W.
Proceedings - 2018 53rd International Universities Power Engineering Conference, UPEC 2018. Piscataway: Institute of Electrical and Electronics Engineers, 2018. 8541859.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Ally, C.Z.

AU - Sun, Y.

AU - de Jong, E.C.W.

N1 - Conference code: 53

PY - 2018/11/20

Y1 - 2018/11/20

N2 - A key constraint to the penetration level or hosting capacity (HC) of PV power in ac-island power systems (IPS) is the resulting frequency volatility. Frequency volatility is directly tied to the inertia level in the grid. Since inertia-less PV power displaces synchronous generators (SG), and thereby their available rotational inertia, the inertia level is reduced and the frequency volatility increased. Frequency volatility can be quantified by the Rate of Change of Frequency (RoCoF). The RoCoF is used as a performance index to determine the HC. Virtual inertia compensation (VIR) by chemical battery storage (BESS) can increase the HC of the grid and allow for more PV power to be integrated. The impact of PI-based VIR on increasing the HC in a 17.5 MVA diesel powered IPS is studied. Results indicate that when added PV without VIR displaced SGs the RoCoF limit could not be upheld. When VIR is added the RoCoF is improved and an HC of up to 3 MW PV is obtained. For the suggested RoCoF limit of -1.45 Hz/s and the studied scenarios it is shown that, in percentage of peak load, diesel-based generation could be replaced by 25% PV, providing that 9% of BESS with VIR is added.

AB - A key constraint to the penetration level or hosting capacity (HC) of PV power in ac-island power systems (IPS) is the resulting frequency volatility. Frequency volatility is directly tied to the inertia level in the grid. Since inertia-less PV power displaces synchronous generators (SG), and thereby their available rotational inertia, the inertia level is reduced and the frequency volatility increased. Frequency volatility can be quantified by the Rate of Change of Frequency (RoCoF). The RoCoF is used as a performance index to determine the HC. Virtual inertia compensation (VIR) by chemical battery storage (BESS) can increase the HC of the grid and allow for more PV power to be integrated. The impact of PI-based VIR on increasing the HC in a 17.5 MVA diesel powered IPS is studied. Results indicate that when added PV without VIR displaced SGs the RoCoF limit could not be upheld. When VIR is added the RoCoF is improved and an HC of up to 3 MW PV is obtained. For the suggested RoCoF limit of -1.45 Hz/s and the studied scenarios it is shown that, in percentage of peak load, diesel-based generation could be replaced by 25% PV, providing that 9% of BESS with VIR is added.

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KW - Frequency response

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PB - Institute of Electrical and Electronics Engineers

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Y2 - 4 September 2018 through 7 September 2018

ER -

Impact of virtual inertia on increasing the hosting capacity of island diesel-PV ac-grid

Abstract

Conference

Keywords

UN SDGs

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