Exctracting tysl data.

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Hi

A question, I'm sorry I am now down in the weeds

I have a network setup and I have been modifying the network to give me the different voltage drops when the solar is connected and not connected.

I have no dynamic data.

I was calculation the voltages using the function fnsl and extracting the data using the function psspy.busdat(bas,KV) and friends.

The utility has told me that I must use the method given in PAGV1 chapter 9. I have concluded:

That fnsl gave me the t- data, and chapter 9 is looking at the t+ data

You can get from t- to t+ by executing the functions. psspy.cong(2) psspy.conl(0,1,1,[0,0],[100.0,0.0,0.0,100.0]) psspy.conl(0,1,2,[0,0],[100.0,0.0,0.0,100.0]) psspy.conl(0,1,3,[0,0],[100.0,0.0,0.0,100.0])

psspy.ordr(0)
psspy.fact()
psspy.tysl(1)  # 1 = flat start

Because the data changed I concluded that the function psspy.busdat(bas,KV) and friends extract the new t+ data.

After the conversion the values are different, not by much, but different. The manual warns me the will be different but states they are better.

What concerns me is, I have two feeders, and one or the other is connected to the load. I would expect I would be able to change the load and not change the results of the unconnected feeder. In the t- case this is the outcome. In the t+ case, it is not, not by much but it is different. This leads me to one of two conclusions:

1) I am wrong, you cannot use psspy.busdat(bas,KV) to extract the data after the conversion. If that is the case how do you get to the data after conversion, and why does the data returned by psspy.busdat(bas,KV) change?

or

2) tysl is weird as it changes voltages ever so slightly in a unconnected network if the load is altered in another.