Evaluating the Impacts of Grounding Systems on Ground Currents and Transient Overvoltage

Saleh A. Saleh, Danielle Jewett, Ahmed Al-Durra, Saikrishna Kanukollu, Julian Luciano Cardenas, Marcelo E. Valdes, Sergio A.R. Panetta

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This article presents a performance comparison of the solid, low impedance, high impedance, frequency-selective, and isolated grounding systems. A grounding system (for any power system component) is designed as an impedance (ZG) that connects the neutral point to the ground. The impedance ZG is constructed using a combination of R, L, and C elements. The values and combination type (series or parallel) of R, L, and C determine the possible influence of ZG on ground currents and potentials. Each grounding system is related to a system voltages level, a specific combination of R, L, and C, and a range of R, L, and C values. The solid, low impedance, high impedance, frequency-selective, and isolated grounding systems are designed for a 3φ transformer and a 3φ synchronous generator in order to compare their influences on ground currents and potentials during ground faults. The transformer and generator are tested for line-to-ground and double line-to-ground faults with all designed grounding systems. Test results show that some grounding systems can reduce ground currents only, while others can reduce ground potentials only. Such capabilities can be used to fulfill certain system and operation requirements (e.g., service continuity, ground capacity, etc.).

Original languageBritish English
Pages (from-to)6002-6013
Number of pages12
JournalIEEE Transactions on Industry Applications
Volume58
Issue number5
DOIs
StatePublished - 2022

Keywords

  • Grounding system designs
  • power system ground faults
  • power system grounding
  • power system protection

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