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Cost reduction and minimization of land based on an accurate determination of fault current distribution in shield wires and grounding systems

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2 Author(s)
Daily, W.K. ; Florida Power & Light Co., Juno Beach, FL, USA ; Dawalibi, F.

The authors describe the methodology used in a careful analysis of the fault current distributions in neutral metallic paths, power system protection requirements, and ground potential rise (GPR) evaluations carried out at FPL's Lauderdale power plant and associate switchyard. These studies resulted in substantial cost savings and land utilization minimization for the power system expansions at Lauderdale plant by confirming that the in-situ expansion and reconfiguration aimed at constructing two electrically independent substations sharing the same site and grounding system is a sound economical alternative to the construction of a new substation and associated significant site preparation and construction costs. The study illustrates, using a real-life installation, the distribution of fault currents and ground potentials along overhead ground wires and neutral conductors connected to a power plant under fault conditions

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Power Delivery, IEEE Transactions on  (Volume:8 ,  Issue: 1 )