Unify variable naming in output files
Currently, we use different notations for naming the variables in the columns of the output csv. In the WSCC grid example we use only
ComponentName as column name (e.g. node00000), while in the powerflow example we use
ComponentName.VariableName (e.g. N0.V). We should unify this such that postprocessing steps performed with villas-dataprocessing can deal with it in a uniform way. I would suggest to go for the second option as it is more specific, allowing for example also to log and clearly identify the voltage and/or the current of lines.