Not sure if I am completely correct, jst run in your env and make the necessary changes. The beginning of your TCL file should be similar.
# This would be the dir c:\SwitchLed\TCL
set origin_dir "."
# Set the directory path for the original project
set orig_proj_dir "[file normalize "$origin_dir/../Work_Dir"]"
# Create project
create_project your_project_name ./../Work_Dir
# Set the directory path for the new project
set proj_dir [get_property directory [current_project]]