Open Ended Voltage Fields
See Also
Added in Version 18, build on July. 30, 2015
Open Ended Voltage Fields are available for all AC branches (both lines and transformers). These values are not effected by the present system voltages and flows at all, but instead are calculated from the impedance properties of the AC branch. Using the assumption that voltages at the terminals of the branch are 1.0 per unit, these fields show the following.
- The per unit voltage magnitude at the open ended side of the line
- The charging Amps at the non-open end sided of the line (the end still closed)
There end up being 4 quantities because the line can be open ended at either the FROM or TO side. This can be a useful quantity for screening how much current will still need to be broken after one end of a line is open. The four fields are then available.
|
Field |
Description |
|
Open Ended\At From Charging Amps at To |
When the branch is open at the FROM bus, this is the charging amps seen at the TO end of the branch assuming the TO bus is operating at 1.0 per unit voltage |
|
Open Ended\at From Per Unit Magnitude at From |
When the branch is open at the FROM bus, this is the per unit voltage at the FROM bus assuming the TO bus is operating at 1.0 per unit voltage |
|
Open Ended\At To Charging Amps at From |
When the branch is open at the TO bus, this is the charging amps seen at the FROM end of the branch assuming the FROM bus is operating at 1.0 per unit voltage |
|
Open Ended\at To Per Unit Magnitude at To |
When the branch is open at the TO bus, this is the per unit voltage at the TO bus assuming the FROM bus is operating at 1.0 per unit voltage |