Looking at the Refrigeration:Compressor object in Energy+.idd and in Input Output reference, input fields Refrigeration Compressor Power Curve Name and Refrigeration Compressor Capacity Curve Name only allow bicubic curves.

EnergyPlus data sets folder (C:\EnergyPlusV8-4-0\DataSets) has RefrigerationCompressorCurves.idf which contains extensive data sets for refrigeration compressor capacity and power curves. See Output Details and Examples for more information on this.