E-TRAN "Translator for Power System Simulation"

Example 1: The example below shows a portion of a network near a bipolar HVDC converter station (click on the image to download a higher resolution picture). The circuit is loaded in PSCAD V4 and was directly generated by E-TRAN from a PSS/E .raw input file. The original circuit was more than 18,000 busses, but for this example, E-TRAN directly translated only 1 bus away (which resulted in a 15 bus circuit) from the HVDC bus and formed a network equivalent of the remaining circuit . The second image below shows the equivalent network (on a sub-page). The voltage magnitude and phase angle of the equivalent sources are automatically calculated to match the power flow of the solved loadflow. Note the multi-port equivalent is valid for steady state as well as for open/short circuit conditions. E-TRAN converted the circuit (using only the PSS/E .raw file) directly into a PSCAD Version 4 .psc file in three phase Single line Diagram (SLD) format.

Example 1: Translated Network (one bus away)

Example 1: Network Equivalent Sub-Page

Example 2: The example below shows a portion of a small network at a 345 kV bus. The circuit is loaded in PSCAD V4 and was directly generated by E-TRAN from a PSS/E .raw input file. E-TRAN directly translated only 2 busses away from the main bus (which resulted in a 15 bus circuit) and formed a network equivalent of the remaining circuit . The second image below shows the equivalent network (on a sub-page). Note that the interface busses are at different voltage levels and a transformer is automatically used for the off-diagonal branches (instead of a pi section transmission line). E-TRAN creates a log file which contains details of the conversion process and numerical output of the system admittance matrices. The log file for this small system is in the file "Example2.txt". In this case the entire circuit was only 160 busses, so it could have easily been translated and run in PSCAD without the need for any network equivalent.

Example 2: Translated Circuit

Example 2: Network Equivalent Sub-Page