I have run a simulation using the IEEE 13 bus test feeder and I need a clarification about an issue. Below you can see a portion of the produced power curve. The power curve regards the whole feeder and not a certain line.
I have observed that the measured Amperes on the line 632-631 (as you can see on the second image below) corresponding to the time enclosed by the circle on the power curve, are higher than the measured Amperes corresponding to the time when the peak on the power curve is observed. Is something like that possible? If this is right, why something like that is possible? Of course, a general question may be if one can observe line overloading on the point enclosed by the circle and not on the peak of the power curve.
Sincerely
Last edit: Rafik Fainti 2015-09-03
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It all depends. Yes, you can get a dip like that - for example a local weather pattern where a large cloud passes over the sun for an hour on a hot day, temporarily reducing HVAC load. You could also have a mixed load feeder (e.g., commercial and residential) where the load peaks do not align temporally.
Then again, it could be a simulation artifact. I don't know how you are simulating your load on this circuit, but I have seen this when there is not enough diversity in some of the setpoints (e.g., cooling_setpoint) or when a loadshape is used across a number of different loads.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Dear all,
I have run a simulation using the IEEE 13 bus test feeder and I need a clarification about an issue. Below you can see a portion of the produced power curve. The power curve regards the whole feeder and not a certain line.
I have observed that the measured Amperes on the line 632-631 (as you can see on the second image below) corresponding to the time enclosed by the circle on the power curve, are higher than the measured Amperes corresponding to the time when the peak on the power curve is observed. Is something like that possible? If this is right, why something like that is possible? Of course, a general question may be if one can observe line overloading on the point enclosed by the circle and not on the peak of the power curve.
Sincerely
Last edit: Rafik Fainti 2015-09-03
Rafik,
It all depends. Yes, you can get a dip like that - for example a local weather pattern where a large cloud passes over the sun for an hour on a hot day, temporarily reducing HVAC load. You could also have a mixed load feeder (e.g., commercial and residential) where the load peaks do not align temporally.
Then again, it could be a simulation artifact. I don't know how you are simulating your load on this circuit, but I have seen this when there is not enough diversity in some of the setpoints (e.g., cooling_setpoint) or when a loadshape is used across a number of different loads.
Thank you very much Mr Fuller