Dear Jose L. Marin and Dr.Zimmerman,
Thank you Mr.Jose L. Marin for your detailed explanations. I also thank
Dr.Zimmerman for giving hint in using find_islands() function.
Regards,
Babulal
On 31-10-2014 18:15, Jose Luis Marin wrote:
Hello Babulal,
I believe that the problem is that MATPOWER does not automatically remove
islands when running a powerflow. Each of the three contingencies you list
happen to isolate a bus, therefore the network needs to be reduced prior to
the call to runpf (Ray -- please correct me if I'm wrong).
You can use extract_islands() for this:
mpc = loadcase(IEEE30_Conting9_11)
mpc =
version: '2'
baseMVA: 100
bus: [30x13 double]
gen: [6x25 double]
branch: [41x13 double]
mpc_reduced = extract_islands(mpc, 1)
mpc_reduced =
version: '2'
baseMVA: 100
bus: [29x13 double]
gen: [5x25 double]
branch: [40x13 double]
Running runpf() on this reduced case works OK for the contingencies you list.
-- Jose L. Marin
Gridquant España SL
Grupo AIA
On Fri, Oct 31, 2014 at 9:41 AM, ckbeee ckb...@tce.edu wrote:
Dear Dr.Zimmerman,
When I perform the power flow for the following contingency in case_ieee30.m
system, MATPOWER experiences numerical instability.
1. Line number 13 (Connected between buses 9-11)
2. Line number 16 (Connected between buses 13-12)
3. Line number 34 (Connected between buses 25-26)
It means no solution exist for these contingencies. It does not give results
for OPF also.
Thanks in advance.
Regards,
Babulal
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Department of Electrical and Electronics Engineering
Thiagarajar College of Engineering.
Madurai-625 015. Tamilnadu. India.
Mobile: +91 98439 17258 [1]
ck_babu...@gmail.com
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Thiagarajar College of Engineering
Madurai-625 015, India
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Assistant Professor
Department of Electrical and Electronics Engineering
Thiagarajar College of Engineering.
Madurai-625 015. Tamilnadu. India.
Mobile: +91 98439 17258
ck_babu...@gmail.com
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