Abstract
Step and touch potentials at transmission
line structures are sonet imes important parameters
in the design of the grounding system . To have
confidence in conventlonal (deterministic) methods of
potential calculation, worst-case values of the design
parameters must be as1rnmed . This often leads to overly
pessimistic results. A probabilistic approach
enables core realistic values to be obtained with the
same degree of conf idcnce . A study has recently been
performed to calculate the probability distributions
of step and touch potentials in Ontario Hydro 230 kV
and 500 kV networks. This paper desert bes analytical
and computational aspects of the efficient program
developed during the course of the Sludy and presents
a number of il lustrative examples .
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