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Investigation of grounding related problems in AC/DC converter stations

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2 Author(s)
Meliopoulos, A.P.S. ; Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Dunlap, J.

An investigation of grounding-related problems in AC/DC substations is reported. The investigation is based on analytical studies and published experimental results. The following grounding related problems have been investigated: (1) ground potential rise in converter stations and DC grounds and its effect on safety; (2) touch, step, and transfer voltages in and around DC converter stations and DC grounds; and (3) effects on soil thermal stability during monopolar operation. Several conclusions have been reached, and the findings of the investigation are summarized in a proposed procedure for the safety assessment of DC grounding systems

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Power Delivery, IEEE Transactions on  (Volume:3 ,  Issue: 2 )