code: def set_operation_voltage_level(self):
          
  
          mv_station_v_level_operation = float(cfg_ding0.get('mv_routing_tech_constraints',
                                                             'mv_station_v_level_operation'))
  
          self.v_level_operation = mv_station_v_level_operation * self.grid.v_level
docs: Set operation voltage level