Efficient Control of Energy Storage for Increasing the PV Hosting Capacity of LV Grids

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Photovoltaic (PV) systems are among the renewable sources that electrical energy systems are adopting with increasing frequency. The majority of already-installed PV systems are decentralized units that are usually connected to lowvoltage (LV) distribution grids. The PV hosting capacity of an LV grid is usually limited by overvoltage, and the efficient control of distributed electrical energy storage systems (EESSs) can considerably increase this capacity. In this paper, a new control approach based on the voltage sensitivity analysis is proposed to prevent overvoltage and increase the PV hosting capacity of LV grids by determining dynamic set points for EESS management. The method has the effectiveness of central control methods and can effectively decrease the energy storage required for overvoltage prevention, yet it eliminates the need for a broadband and fast communication. The net power injected into the grid and the amount of reactive power absorbed by PV inverters are estimated using the PV generation forecast and load consumption forecast, and the dynamic operating points for energy storage management are determined for a specific period of time by solving a linear optimization problem. Simulations performed on a realistic LV feeder of the Danish island Bornholm verify the performance of the proposed method.
Original languageEnglish
JournalIEEE Transactions on Smart Grid
Volume9
Issue number3
Pages (from-to)2295 - 2303
ISSN1949-3053
DOIs
Publication statusPublished - 2016

Keywords

  • Energy storage
  • Overvoltage prevention
  • Photovoltaic
  • Reactive power
  • Dynamic set point

Cite this

@article{b7758ee016f2427d959e89b52237520f,
title = "Efficient Control of Energy Storage for Increasing the PV Hosting Capacity of LV Grids",
abstract = "Photovoltaic (PV) systems are among the renewable sources that electrical energy systems are adopting with increasing frequency. The majority of already-installed PV systems are decentralized units that are usually connected to lowvoltage (LV) distribution grids. The PV hosting capacity of an LV grid is usually limited by overvoltage, and the efficient control of distributed electrical energy storage systems (EESSs) can considerably increase this capacity. In this paper, a new control approach based on the voltage sensitivity analysis is proposed to prevent overvoltage and increase the PV hosting capacity of LV grids by determining dynamic set points for EESS management. The method has the effectiveness of central control methods and can effectively decrease the energy storage required for overvoltage prevention, yet it eliminates the need for a broadband and fast communication. The net power injected into the grid and the amount of reactive power absorbed by PV inverters are estimated using the PV generation forecast and load consumption forecast, and the dynamic operating points for energy storage management are determined for a specific period of time by solving a linear optimization problem. Simulations performed on a realistic LV feeder of the Danish island Bornholm verify the performance of the proposed method.",
keywords = "Energy storage, Overvoltage prevention, Photovoltaic, Reactive power, Dynamic set point",
author = "{Hashemi Toghroljerdi}, Seyedmostafa and Jacob {\O}stergaard",
year = "2016",
doi = "10.1109/TSG.2016.2609892",
language = "English",
volume = "9",
pages = "2295 -- 2303",
journal = "I E E E Transactions on Smart Grid",
issn = "1949-3053",
publisher = "Institute of Electrical and Electronics Engineers",
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}

Efficient Control of Energy Storage for Increasing the PV Hosting Capacity of LV Grids. / Hashemi Toghroljerdi, Seyedmostafa; Østergaard, Jacob.

In: IEEE Transactions on Smart Grid, Vol. 9, No. 3, 2016, p. 2295 - 2303.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Efficient Control of Energy Storage for Increasing the PV Hosting Capacity of LV Grids

AU - Hashemi Toghroljerdi, Seyedmostafa

AU - Østergaard, Jacob

PY - 2016

Y1 - 2016

N2 - Photovoltaic (PV) systems are among the renewable sources that electrical energy systems are adopting with increasing frequency. The majority of already-installed PV systems are decentralized units that are usually connected to lowvoltage (LV) distribution grids. The PV hosting capacity of an LV grid is usually limited by overvoltage, and the efficient control of distributed electrical energy storage systems (EESSs) can considerably increase this capacity. In this paper, a new control approach based on the voltage sensitivity analysis is proposed to prevent overvoltage and increase the PV hosting capacity of LV grids by determining dynamic set points for EESS management. The method has the effectiveness of central control methods and can effectively decrease the energy storage required for overvoltage prevention, yet it eliminates the need for a broadband and fast communication. The net power injected into the grid and the amount of reactive power absorbed by PV inverters are estimated using the PV generation forecast and load consumption forecast, and the dynamic operating points for energy storage management are determined for a specific period of time by solving a linear optimization problem. Simulations performed on a realistic LV feeder of the Danish island Bornholm verify the performance of the proposed method.

AB - Photovoltaic (PV) systems are among the renewable sources that electrical energy systems are adopting with increasing frequency. The majority of already-installed PV systems are decentralized units that are usually connected to lowvoltage (LV) distribution grids. The PV hosting capacity of an LV grid is usually limited by overvoltage, and the efficient control of distributed electrical energy storage systems (EESSs) can considerably increase this capacity. In this paper, a new control approach based on the voltage sensitivity analysis is proposed to prevent overvoltage and increase the PV hosting capacity of LV grids by determining dynamic set points for EESS management. The method has the effectiveness of central control methods and can effectively decrease the energy storage required for overvoltage prevention, yet it eliminates the need for a broadband and fast communication. The net power injected into the grid and the amount of reactive power absorbed by PV inverters are estimated using the PV generation forecast and load consumption forecast, and the dynamic operating points for energy storage management are determined for a specific period of time by solving a linear optimization problem. Simulations performed on a realistic LV feeder of the Danish island Bornholm verify the performance of the proposed method.

KW - Energy storage

KW - Overvoltage prevention

KW - Photovoltaic

KW - Reactive power

KW - Dynamic set point

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