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Stability Analysis and HIL Validation of PV Park Voltage Control Considering Communication Delays
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  • Behnam Daftary Besheli,
  • Federico Cecati,
  • Sante Pugliese,
  • Marco Liserre,
  • Johanna Becker,
  • Mario Paolone
Behnam Daftary Besheli

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Federico Cecati
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Sante Pugliese
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Marco Liserre
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Johanna Becker
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Mario Paolone
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Abstract

Motivated by recent advances in industrial data communications, MW-class PV parks are increasingly utilizing communication-based coordination among different power converters to achieve accurate voltage regulation and stability, particularly during grid events. However, communication delays present in data transfer networks reduce coordination quality and deteriorate the ability of the PV park to respond in a timely manner. This paper investigates the impact of such delays on the voltage recovery performance of grid-tied converters in a PV park, coordinated by a centralized secondary voltage controller (SecVC), under different grid and delay conditions. In addition, to enhance the coordination quality, a local strategy for the converter-level controller is proposed to reduce the control sensitivity to the communication delays. The theoretical results obtained from nonlinear model and Monte-Carlo analysis are validated using a real communication setup between two Hardware-in-the-Loop devices (HIL), interfaced through a communication network emulator using the Modbus-TCP protocol.
29 May 2024Submitted to TechRxiv
07 Jun 2024Published in TechRxiv