Performance Assessment of Distance Protection in Systems with High Penetration of PVs

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This paper deals with the investigation of the performance of distance protection in a 400 kV transmission line for a system with high penetration of photovoltaic sources (PV). A grid with a PV plant is designed in RSCAD software environment, which is supported by RTDS. By performing hardware-in-the-loop tests, two commercial relays are investigated in real-time. Firstly, the distance protection function is tested with a synchronous generator to check the response of the studied system and validate correct relay settings. Afterwards, the synchronous generator is replaced by a generic PV plant model. The impact of different fault locations, fault types and fault impedances are studied. Finally, the critical scenarios in the power system are determined for which a relay fails to detect a fault. Many simulations are performed and cases, when a relay unexpected operations, are identified. Relevant solutions to overcome these problems are suggested.

Original languageEnglish
Title of host publication2019 IEEE Milan PowerTech
Number of pages6
ISBN (Electronic) 978-1-5386-4722-6
ISBN (Print)978-1-5386-4723-3
Publication statusPublished - 2019
Event2019 IEEE Milan PowerTech, PowerTech 2019 - Milan, Italy
Duration: 23 Jun 201927 Jun 2019


Conference2019 IEEE Milan PowerTech, PowerTech 2019


  • Distance protection function
  • Hardware-in-the-loop test
  • Photovoltaic plant
  • Real-time digital simulation
  • VSC converter

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