Mitigating Overvoltage in Power Grids with Photovoltaic Systems by Energy Storage

Sarah Landl, Harald Kirchsteiger

Research output: Contribution to journalArticlepeer-review

Abstract

The rise of photovoltaic (PV) penetration is contributing to the increasing incidence of overvoltage detection in the electrical grid during times of high-power generation. Overvoltage can cause disturbances or (partial) failures in the electrical supply network, since the components used are designed for a certain voltage band. One option to counteract too high voltage levels and thus ensure power quality, grid stability and resilience is the absorption of active power by means of a battery energy storage system (BESS). In this paper, we first built a suitable simulation setup for a typical European network section, including a large-scale PV system connected to the 10 kV level and a BESS model. A suitable charging and discharging algorithm for the BESS with the aim to realize peak shaving for the grid voltage was developed and implemented. Simulations, performed in MATLAB/Simulink®, show the dependence of the battery capacity and power on the grid-serving effect of BESS. By determining appropriate values for these two factors a significant reduction of the voltage level could be achieved.

Original languageEnglish
Pages (from-to)470-483
Number of pages14
JournalEnvironmental and Climate Technologies
Volume26
Issue number1
DOIs
Publication statusPublished - 1 Jan 2022

Keywords

  • photovoltaic
  • Power grid
  • resilience

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