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

Publication: Research - peer-reviewJournal article – Annual report year: 2016

DOI

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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
Number of pages9
ISSN1949-3053
DOIs
StatePublished - 2016
CitationsWeb of Science® Times Cited: 0

    Keywords

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