Which API can I use to trip loads at a bus bar using python and to reconnect it back during dynamic simulations? I tried to use the ldmod_status2 API but it doesn't trip the load. It just changes the status of the dynamic model attached to a load from on to off or vise versa.
Perhaps you could move the load to a new bus, which is connected to the original bus via a zero impedance line. Use DIST_BRANCH_TRIP to trip the branch (and island the load), then use busdata2 to change the bus code to 1 before using DIST_BRANCH_CLOSE to reconnect it.
In dynamic simulations you have access to data changing APIs in PSSE listed in Chapter 2 of the API manual. You are not restricted to those listed in Chapter 4.13.
This means that you just use psspy.load_chng_4(ibus,id,[0]) to disconnect the load and psspy.load_chng_4(ibus,id,[1]) to reconnect the load again. It is so simple in PSSE!
Please use the tick symbol to remove the previous answer as correct, since it was merely a very complicated solution to your simple problem.
Thank you for your response. I have tried to run the dynamic simulation with the distbranchtrip and distbranchclose APIs. The zero impedance line trips when I use distbranchtrip API. However, after the circuit is set to out of service the bus where the load was connected is automatically disconnected because it becomes islanded with no in-service machines connected to it. Thus, when I use the distbranchclose API an error message is displayed saying that the bus is out-of-service and has type code=4 so the branch is not put back in service. Is there a way around this?
Asked: 2014-07-09 06:08:26 -0600
Seen: 2,492 times
Last updated: Sep 29 '16
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