Usually the system operator at the control center send directives such as
appropriate adjustments as to generation and/or load to alleviate line or
transformer loading whenever its capacity is reached. Voltage vectors in ac
transmission system are dependent on bus injections, so control center
This is not a MATPOWER specific question. I suggest you take it to your local
power systems professor/expert or some other forum.
--
Ray Zimmerman
Senior Research Associate
211 Warren Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Apr 29, 2011, at 11:23 AM, z qin wrote:
You were right, thanks a lot!
Earlier I did not modify the b columns of the branch matrix.
Using Y_base = 1/ Z_base the powerflow results stay the same no matter
which baseMVA value I chose.
--
Dipl.-Inform. Thole Klingenberg
OFFIS
FuE Bereich Energie | R&D Division Energy
Escherweg 2 – 26121
Hello all,
After running the matpower, we can get the vector vectors on all buses,
which are the state estimates of the power system. After obtaining the state
estimates, how can a control center response? I mean, what can the control
center do? For example, if the control center finds that one tr
Ray, Thank you very much.
Jerry.
On Wed, Apr 27, 2011 at 2:18 PM, Ray Zimmerman wrote:
> The power loss (real and reactive) in a branch is given by s_f + s_t, where
> ...
>
>s_f = v_f * conj(i_f)
>s_t = v_t * conj(i_t)
>
> ... and i_f and i_t are computed via (3.1) and (3.2) in the
> m
Hi, thanks for your help. I am not sure if I can follow, though.
1) The formula you have posted implies that the results of the power flow
analysis change if the base voltage is modified.
It seems to me, that this is not the case in Matpower. Changing the
base voltages in "case9.m" from 3
> Hi, I have a question about Matpower 4.0
>
> By running" runpf('case9') " I get the power flow of the 9-bus system.
> If I change baseMVA from 100 to 1000 or 10 in file 'case9.m',
> the results of power flow do change completely! Why?
> Is this because the r, x and b columns are expressed
