Add some comments to the code

dataprocessing/validationtools.py

@@ -48,6 +48,11 @@ def convert_neplan_to_modelica_timeseries(neplan_timeseries):
     return neplan_timeseries
 
 def convert_simulink_to_modelica_timeseries(simseri):
+    """
+    Convert the steady-state results timeseries from simulink to modelica timeseries
+    :param simseri: simulate timeseries, generated by the result file from simulink
+    :return: a result timeseries
+    """
     res = []
     for check in range(len(simseri)):
         if 'U AB:' in simseri[check].name: