In the paper, the response surface modeling approach is applied to study the effectiveness of different grounding schemes implemented for mitigation of single-line-to-ground faults in a simulation of a notional Medium Voltage DC shipboard power system. Multivariate adaptive regression splines (MARS) models are used for preliminary exploration of the functional relationships between the input parameters and response variables. Using the constructed MARS models, Sobol' total sensitivity indices

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... re computed for the models to study possible differences in the sensitivities of the response variables for the different grounding schemes. For final analyses, and for response surface models for which the MARS models show significant prediction error, Gaussian process models are used to account for prediction variance. Nomenclature V mid = Zero potential at the midpoint between two high-impedance elements V n = Voltage at the generator neutral point V dc = DC bus line-to-line voltage 1