Radial Distribution Analysis Package (RDAP)
The RDAP application models all three phases of an electric distribution system feeder. Any size system can be built with no limit on the number of substations or the number of feeders connected to each substation (harddrive space would be the only limiting factor). Switches can be "opened" and the resulting disconnected portion transferred to another feeder.
An educational version of RDAP can be downloaded in zip file format from this site. It was developed in the 1990's and while it runs on PC's using most Microsoft Operating Systems through XP, it is no longer being supported.
Various techniques for
using RDAP are contained in a zip file called "RDAPHelp2007".
A Microsoft WORD version of the RDAP User's Guide can be downloaded from this site.
Feeder modeling utilizes the building blocks of:
Once the feeder is built, an optional scaling feature will adjust the feeder loads to match a given substation meter reading. The scaling is based on anticipated feeder conditions including regulator action, loses and appropriate load modeling.
Flow Analysis is interactive, meaning various parameters (loads, capacitors, feeder bus voltage, alternate source and regulator settings) can be quickly changed and their effects viewed. Interactive changes do not affect the permanent feeder data.
Short Circuit Analysis determines the maximum fault current in amps at every feeder node.
Motor Starting Analysis simulates the effect of induction motor startup at any given feeder node. A voltage profile from the source to the motor show the pre, during and post voltages by phase.