Search found 7 matches

by bbiswas
1 month ago
Forum: Modeling
Topic: How to write a conic constraint in GAMS?
Replies: 1
Views: 164

How to write a conic constraint in GAMS?

Hello,
I need to add a conic constraint in my model. For example, the constraint is ||2A, 2B, C-D||<= C+D. The order of the conic is 2. How to write that in the GAMS language?
Thank you.
by bbiswas
2 months ago
Forum: Modeling
Topic: GAMS for larger systems.
Replies: 5
Views: 201

Re: GAMS for larger systems.

Sir,
I've sent the codes to the mail address that you mentioned earlier.
Thank you.
by bbiswas
2 months ago
Forum: Modeling
Topic: Optimal Power Flow of larger power system.
Replies: 1
Views: 88

Optimal Power Flow of larger power system.

Hi, Did anyone works on optimal power flow of larger systems? Currently I'm working with a 500 nodes system which consists of 599 lines and 90 generators. I'm using Quadratic Constrained Programming to solve. But, while building the model, every time GAMS ran out of memory after occupying more that ...
by bbiswas
2 months ago
Forum: Modeling
Topic: GAMS for larger systems.
Replies: 5
Views: 201

Re: GAMS for larger systems.

And sir, here are the lines from .lst file where mentioned about the memory allocation issues: *** Out of Memory while executing line 4321 Heap Statistics for heap: BBMgr Memory in use = 27,047 Mb Highest memory used = 27,047 Mb Large blocks available = 0 Statistics for small heap: gheap Nr Allocate...
by bbiswas
2 months ago
Forum: Modeling
Topic: GAMS for larger systems.
Replies: 5
Views: 201

Re: GAMS for larger systems.

Thank you for your reply sir. Here's the log that you asked for: --- Starting compilation --- trial_1.gms(64) 3 Mb --- .ReYbus_mat.csv(501) 3 Mb --- trial_1.gms(70) 3 Mb --- .ImYbus_mat.csv(501) 3 Mb --- trial_1.gms(76) 3 Mb --- .ReYf_mat.csv(600) 3 Mb --- trial_1.gms(82) 3 Mb --- .ImYf_mat.csv(600)...
by bbiswas
2 months ago
Forum: Modeling
Topic: GAMS for larger systems.
Replies: 5
Views: 201

GAMS for larger systems.

Hi, Currently I'm working on a larger power system having 500 nodes, 599 lines and 90 generator. My objecting is to minimize cost and line loss using Semi Definite Programming. The problem is when I ran the model it takes a lot of time and at the end the operation terminates saying that insufficient...
by bbiswas
2 months ago
Forum: Modeling
Topic: How to change GDX dimension limit?
Replies: 1
Views: 134

How to change GDX dimension limit?

Hello, I'm working on optimiziation of power system using GAMS interfaced with MATLAB. To come up with a generalized code which will work for any size of power system I want to send the set including size of the system (i.e., 33 bus system, 123 nodes system etc) from MATLAB to GAMS. I've found that ...