Why I am receiving different DAPPER load flow results compared to I*SIM/TMS load flow results in the same project?
Both I*SIM and TMS run an initial load flow study for a particular case. If the DAPPER LF datablocks on the one-line drawing are displayed while running I*SIM/TMS, the datablock will be updated with the new calculated values.
In some cases a user may receive different DAPPER load flow results compared to the completed I*SIM/TMS load flow. Here's an example of DAPPER load flow results:
The following indicates a different load flow result after running I*SIM:
As shown, the DAPPER load flow results and the VD% are different.
The following reasons account for the load flow differences:
On the other hand, I*SIM/TMS will not include the utility/swing generator impedance since the software assumes they already have a model.
For identical DAPPER and I*SIM/TMS load flow results:
DAPPER load flow results after applying the above modifications:
I*SIM/TMS load flow results after applying the above modifications:
An alternative solution is to deselect the motors from the I*SIM/TMS case menu.