MATPOWER does not currently have the ability to handle cases with
isolated buses. Manually creating a modified case file and excluding
the isolated buses is an option. In fact, it shouldn't be too
difficult to write a function that automatically strips out isolated
buses.
--
Ray Zimmerman
Senior Research Associate
428-B Phillips Hall, Cornell University, Ithaca, NY 14853
phone: (607) 255-9645
On Oct 6, 2008, at 3:58 PM, Sridhar Chouhan Jr wrote:
Dear Mr.Ray,
I have a problem with load flow solution of particular case file.
Here I
am attaching the case file with the mail.
In my case file, I created some faults in the network(Branches (9,10)
(10,11) and (11,12) are turned 'off') such that the load at bus 10 is
not supplied.
when I run the powerflow....runpf('mycase1'), The solution looks
like as
follows
=
=
=
=
=
=
=
=
=
=
======================================================================
| Bus Data
|
=
=
=
=
=
=
=
=
=
=
======================================================================
Bus Voltage Generation Load
# Mag(pu) Ang(deg) P (MW) Q (MVAr) P (MW) Q (MVAr)
----- ------- -------- -------- -------- -------- --------
1 1.000 0.000 22.85 7.35 - -
2 0.969 -2.611 - - 3.31 1.79
3 0.960 -2.776 - - 2.13 1.15
4 0.946 -3.844 - - 2.56 1.38
5 0.963 -2.751 - - 0.93 0.50
6 0.962 -2.776 - - - -
7 0.961 -2.784 - - - -
8 0.957 -3.023 - - 2.07 1.12
9 0.948 -3.901 - - 2.42 1.31
10 NaN NaN - - 1.26 0.68
11 NaN NaN - - - -
12 0.981 -1.623 - - 1.33 0.78
13 0.992 -0.969 - - 5.34 2.99
14 1.000 -1.524 3.00 7.99 - -
15 0.982 -1.536 - - 2.67 1.44
16 1.000 -1.524 - - - -
17 0.972 -1.819 - - - -
18 0.964 -2.192 - - 2.67 1.44
-------- -------- -------- --------
Total: 25.85 15.34 26.69 14.58
Does this mean we can't solve the power flow.?
Can't the Matpower take the connected part of the network only and do
load flow for that part?
Thanks in advance.
Sridhar Chouhan.
<mycase1.m>
