Search found 12 matches
- 2 years ago
- Forum: Modeling
- Topic: Algebra eror in my formulation
- Replies: 0
- Views: 1334
Algebra eror in my formulation
Hi, I am struggling with a formation with my attached GAMS code. I would like to compute the voltage at the sending end of a branch. I get an error when I solve: Line 126 is problem. V(i+1)^2 = V(i)^2 - 2 (resistance * Pflow_line + reactance *Qflow_line); My code is attached ForGamsHelpIEEE33Bus.gms...
- 3 years ago
- Forum: Syntax
- Topic: Use $ondelim and $offdelim to include a csv file cont multi-dimensional (dimension >2) table
- Replies: 1
- Views: 2772
Re: Use $ondelim and $offdelim to include a csv file cont multi-dimensional (dimension >2) table
A solution has been provided for this problem:
It reads:
With ondelim, the entire data statement has to be comma separated, i.e. also the domain of the symbol.
Thank you, Fred
It reads:
With ondelim, the entire data statement has to be comma separated, i.e. also the domain of the symbol.
Thank you, Fred
- 3 years ago
- Forum: Modeling
- Topic: Optimal restoration path problem - Infeasible solution
- Replies: 2
- Views: 3404
Re: Optimal restoration path problem - Infeasible solution
Many thanks, Renger for your advice. This problem has now been solved.
- 3 years ago
- Forum: Syntax
- Topic: Use $ondelim and $offdelim to include a csv file cont multi-dimensional (dimension >2) table
- Replies: 1
- Views: 2772
Use $ondelim and $offdelim to include a csv file cont multi-dimensional (dimension >2) table
HI, Whenever I try to use $ondelim and $offdelim to include a CSV file containing a multi-dimensional (dimension >2) table I get into trouble (error 445). I have read that the trick is to delay $ondelim in the following code: I need some help in imposing this trick on my problem. I still have errors...
- 4 years ago
- Forum: Syntax
- Topic: Syntax Problem
- Replies: 2
- Views: 8687
Re: Syntax Problem
Brilliant. Thank you. I am eternally grateful.
- 4 years ago
- Forum: Syntax
- Topic: Syntax Problem
- Replies: 2
- Views: 8687
Syntax Problem
Hello, I have a table: Table branch(l,n,np,*) branch characteristics X rating exist branchNum L1.n1.n2 0.0281 2.5 1 1 L2.n2.n3 0.0108 3.5 1 2 L3.n3.n4 0.0297 2.4 1 3 L4.n4.n5 0.0297 2.4 1 4 L5.n5.n1 0.0064 4 1 5 L6.n1.n4 0.0304 1.5 1 6; I have a binary variable x(l,t) I would like to make a summatio...
- 4 years ago
- Forum: Syntax
- Topic: Element by Element Multplication in GAMS
- Replies: 4
- Views: 3287
Re: Element by Element Multplication in GAMS
GamsAssitance_Fixed.gms Hi Works fine for me, when I run your code after correcting some non-related errors. But perhaps you are looking for something else. I attach the corrected version. Cheers RengerGamsAssitance.gms Many thanks for your quick response. I want to apologize for not explaining my ...
- 4 years ago
- Forum: Syntax
- Topic: Element by Element Multplication in GAMS
- Replies: 4
- Views: 3287
Element by Element Multplication in GAMS
Hi,
I need help with the correct syntax for element by element multiplication using GAMS. My shortcode is attached.
I need help with the correct syntax for element by element multiplication using GAMS. My shortcode is attached.
- 4 years ago
- Forum: Modeling
- Topic: Optimal restoration path problem - Infeasible solution
- Replies: 2
- Views: 3404
Optimal restoration path problem - Infeasible solution
Hi,
I have modelled the optimal restoration path problem in a 5bus network using AC-power flow formulation. This is modelled as a MINLP problem and solved with BONMIN solver.
My formulation yields an infeasible solution. Can anyone please help?
The gams code is attached.
Thank you.
I have modelled the optimal restoration path problem in a 5bus network using AC-power flow formulation. This is modelled as a MINLP problem and solved with BONMIN solver.
My formulation yields an infeasible solution. Can anyone please help?
The gams code is attached.
Thank you.
- 4 years ago
- Forum: Modeling
- Topic: Help with GAMS Error 140
- Replies: 1
- Views: 2357
Help with GAMS Error 140
Hi
I have the following code and each time I execute I get the GAMS Error 140. I would be appreciated if I can get any assistance. My error comes from the last line of the code.
I have the following code and each time I execute I get the GAMS Error 140. I would be appreciated if I can get any assistance. My error comes from the last line of the code.