Hi Carlos, I think there is a bus labeled 1 in the bus field, next to the
"mpc.bus" in the file, and it is a slack bus. If there was not a slack bus,
runpf() will report an error. So this may not be the problem of my case...
Best Regards,
Yang Yang
------------------ Original ------------------
From:
"MATPOWER discussion forum"
<[email protected]>;
Date: Thu, Mar 25, 2021 02:28 AM
To: "MATPOWER discussion forum"<[email protected]>;
Subject: Re: Constructing IEEE second benchmark for subsynchronous
resonance using matpower
yangyang wrote:
Dear all,
I am trying to construct the power flow of IEEE 2nd
benchmark for SSR study; and my implementation is as attached. The
capacity compensation is 55% and the other data can be found in the
paper (https://ieeexplore.ieee.org/document/4118844) I am not
attaching the paper because there is size limit. However, the power
flow results differ a lot from the example in Simulink; runpf() shows
that the angle at all buses are 0 but the example in Simulink
(https://www.mathworks.com/help/physmod/sps/ug/steam-turbine-and-governor-system-subsynchronous-resonance.html?searchHighlight=subsynchronous%20resonance&;s_tid=srchtitle)
shows that the angle at the terminal of the generator is
around -30 degrees. How can I reproduce this correctly? Thank you.
Best Regards,
Yang Yang
After a five second glance at your file, I see that your fist
generator is assigned to a bus with a label of '1'; however, in your bus
table there is no bus with such a label. Also, you don't have a reference
bus. Additionally, the interconnections in your branch table would imply
the existence of at least four buses labeled "1", "2", "3" and "4", but as
said earlier, "1" is missing.
carlos.
