Effects of centralized and local PV plant control for voltage regulation in LV feeder based on cyber-physical simulations

Theis Bo Rasmussen*, Guangya Yang, Arne Hejde Nielsen, Zhaoyang Dong

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

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Abstract

In the modern power system, both local and centralized reactive power control strategies for photovoltaic (PV) plants, are proposed and compared. While local control improves the network security, it lacks the optimization benefits from centralized control strategies. Therefore, this paper considers the coordination of the two control strategies, depending on external impact from the weather system and consumer behavior, in a low voltage (LV) distribution feeder. Through modeling and simulation in an established real-time cyber-physical simulation platform, the LV network is evaluated with both local and centralized control. A set of boundaries for coordinating between the two strategies are identified, which can help network operators in deciding suitable control in different operating situations. Furthermore, the cyber-physical simulation platform, is used to study the impact of physical perturbations, i.e. changes in irradiance and consumption, and cyber disturbances, in form of communication channel noise, is evaluated for the control strategies. Results show how small and large disturbances in the cyber system affects the centralized control strategy optimizer performance.
Original languageEnglish
JournalJournal of Modern Power Systems and Clean Energy
Volume6
Issue number5
Pages (from-to)979-991
ISSN2196-5625
DOIs
Publication statusPublished - 2018

Keywords

  • Distribution Network
  • Voltage regulation
  • Photovoltaics
  • Cyber-physical system

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