Hi Ray, Thanks for your reply. I would like to ask some more help on modifying the opf_branch_flow_fcn.m. Here goes my description:
As far as I know, matpower does not discriminate between transformer and non-transformer branch, but for my case I have two different type of constraints for non-transformer and transformer branches. For non-transformer lines I have flow limit constrained by current whereas for transformer, flow limits are constrained by apparent power rating. Can you suggest, how should I incorporate those two situations together. The way, I am currently adopting to implement those constraints, is first I consider all the branch flows constrained by line current rating. Then, I calculate the transformer branch constraints as per apparent power ratings. Eventually, I replace previously calculated transformer branch information by this new quantities. Do you think this will create any problem for further processing with the h and dh , determined from branch_flow_fcn.m? Regards, Jubeyer On Mon, May 20, 2019 at 12:16 PM Ray Daniel Zimmerman <[email protected]> wrote: > a. radians > > b. In both of those cases, there are no constrained branches (i.e. all > mpc.branch(:, RATE) are zero), meaning there are no branch flow limits to > evaluate, so opf_branch_flow_fcn() does not need to be called. > > c. A function pointer to opf_branch_flow_fcn() is declared with the input > parameter il in line 320 of opf_setup.m > <https://github.com/MATPOWER/matpower/blob/a6a489c3d3a83f5c65fc7e0a5dc5306eb7cc6ac0/lib/opf_setup.m#L320>, > and il is defined in line 287 > <https://github.com/MATPOWER/matpower/blob/a6a489c3d3a83f5c65fc7e0a5dc5306eb7cc6ac0/lib/opf_setup.m#L287> > . > > Ray > > > > On May 16, 2019, at 11:51 AM, Jubeyer Rahman <[email protected]> wrote: > > Hi, > > I have several questions on the code in opf_branch_flow_fcn.m; > > a. What is the unit of voltage angle 'Va' within opf_branch_flow_fcn.m , > degree or radian? > > b. While running opf for some of the cases like case14, case118, etc. when > I set the breakpoint within the opf_branch_flow_fcn.m, it does not halt > there; what are the reasons for that? Though for cases like case9 or case5, > it does enter in the branch_flow_fcn code? > > c. where the 'il' (an input to opf_branch_flow_fcn) is first declared? > and which one is the immediate code before opf_branch_flow_fcn where 'il' > has been modified? > > Regards, > Jubeyer > > > >
