Hi Pedro,
First, you should know that the state estimation code is essentially
proof-of-concept code which is included in case it could be helpful to
someone. It is very basic and not very thoroughly tested. In any case,
I'm pretty sure that it does not even take into consideration any of
the generator limits and if I remember some of the code (in
state_est.m) is specific to the 30-bus system.
Ray
On Apr 30, 2008, at 1:23 PM, Pedro Landolt wrote:
Good afternoon,
I´m having the following problems:
1st - on the case 14, I changed the limit (PMax) on the generation
bus 2 on the gen matrix to 75 MW. When I solve the state estimation
problem (runse('case14')) this limit is not always meet and in some
simulations I got more than 100MW. Near 75 would be acceptable cause
state estimation isn´t exact so it may have a little more than 75MW,
but 100MW is 33% more than the limit. I also changed the initial
state to the flat start (it seems to get more often results closer
to the limit).
2nd - I notice is that the final results in some generators (only on
the ones on the buses 3, 6 and 8) the active power (P) goes bellow
0, and also in some loads (normally on bus 7). This should mean
that the generators were acting as a load and the load as a
generator. This issue I checked in the program without any changes
and it also happened.
Thanks for the help and best wishes to all,
Pedro Landolt
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