Voltage drop calculator based in Gauss-Seidel Loadflow solution for 2 bar system, where the user can add generation and capacitor for power factor compensation.
When convergency is reached, you will obtain the voltage drop, the watts and vars needed in the system to feed the load, you can also see the line losses, the power factor at the source bar. THe software has its own report where all variables can be transmitted to a printer.