Need to check the load current (amps) for 40+ lines. Can Python check the load current?
This is what I have so far:
bus1 = 1004
bus2 = 1005
ckt = "1"
amps = brnmsc(bus1,bus2,ckt,"AMPS")
print amps
But I have 40+ lines. I only know to check the first line.
I'm a little confused by your question. It is titled "how to check bus current in PSSE." However, the concept of current is poorly defined for a bus as, per Kirchhoff's laws, the sum of the current at a bus is zero.
So I'm interpreting your question to mean "how do I report the current of all lines connected to a bus." First I would define a subsystem around the bus using the bsys() command:
psspy.bsys(1,0,[.12, 999], 0, [], 1, [busNum, ], 0, [], 0, [])
You can then use the bus subsystem API to get the amps of all tie-lines.
ierr, iarray = psspy.aflowreal(1,1,2,1,'AMPS')
If you are also interested in the other devices connected to a bus, there is a similar set of functions for the other circuit elements (amachreal, afxshuntreal, etc..) See Chapter 8 of the API documentation for more info.
Using the subsystem API is a smart way to do this. @AaronH the "check bus current" title does raise some questions. If what you wanted was a report of currents connected to a bus, this is how you'd do that. I highly recommend looking into the subsystem functions `bsys` and `aflowreal`
if you have list of the lines, all currents from them you can get very easy:
lines=[[5001,5013,"1"],
[5001,5035,"1"]] #put here as many lines as you want
l=len(lines)
for i in range (l):
error, amp = psspy.brnmsc(lines[i][0],lines[i][1],lines[i][2],"AMPS")
if error==0:
print str(i+1)+". Line: ",lines[i][0],lines[i][1],lines[i][2]," : ",round(amp,2)," A"
else:
print str(i+1)+". Line: ",lines[i][0],lines[i][1],lines[i][2]," : ","error in brnmsc"
Using `brnmsc` like this is another good way to get the current.
For those who don't use python ! , HOW to do it with psse ?
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