Thanks, don’t hesitate to contact me for feedback along the way. More frequent feedback earlier in the process is always helpful to avoid the need for major modifications later on.

Thanks again, Ray > On Jan 25, 2018, at 11:09 AM, Baljinnyam Sereeter <b.seree...@tudelft.nl> > wrote: > > On 01/25/2018 03:47 PM, Ray Zimmerman wrote: >> Hi Baljinnyam, >> >> Thanks for your offer to contribute. This would be a nice addition to >> MATPOWER. >> >> I suggest starting by adding two new MATPOWER options, each with default >> values of 0 … >> >> opf.current_balance = 0 (complex power balance) or 1 (complex current >> balance) >> opf.v_cartesian = 0 (polar) or 1 (Cartesian) >> >> Then find all the places in the existing OPF code where the current >> (default) formulation is assumed and add conditionals to implement the other >> variations. You might find it useful to use the MATLAB Profiler with a >> simple runopf() call to map out the functions that are called. I think much >> of the work will be in opf_setup(), where we’ll need to use different >> variables and constraints. >> >> Another thing to do early in the process is to duplicate the t/t_opf_mips.m >> file for each of the 3 new variations. The initial goal will be to get all >> of those tests to pass for each of the versions. >> >> Of course, you will want to begin all of this on your own fresh fork of the >> current MATPOWER development branch using the guidelines in the >> Contributor’s Guide >> <https://github.com/MATPOWER/matpower/blob/master/CONTRIBUTING.md#submitting-additions-or-modifications-to-the-code>. >> >> Don’t hesitate to ask if you have questions or need any help along the way. >> >> Thanks again, >> >> Ray >> >> >> >> >>> On Jan 24, 2018, at 4:40 AM, Baljinnyam Sereeter <b.seree...@tudelft.nl >>> <mailto:b.seree...@tudelft.nl>> wrote: >>> >>> Dear Matpower developers, >>> >>> I use Matpower for my work to solve OPF problems. As we know that the power >>> balance (mismatch) equations in Polar coordinates are used as equality >>> constraints in the OPF formulation in Matpower. However, depending on the >>> formulation of equality constraints (power or current mismatch) and >>> specification of the coordinates (Polar or Cartesian), OPF problem can be >>> formulated mathematically in four different ways for a single physical >>> formulation. I am working on other three versions since some advantages can >>> be obtained for the derivatives or properties of matrix equations of Newton >>> update step. I have finished other versions theoretically and implemented >>> on Matlab. So I was wondering if you would like to include the other >>> versions in Matpower. >>> >>> If you are interested, I would like to discuss how we can design the >>> implementation. Thanks in advance. >>> >>> >>> Regards, >>> >>> Baljinnyam S >>> >>> >> > Dear Ray, > > Thank you for your suggestions. I will begin with the current MATPOWER > development branch and try to implemented as you suggested. I am not sure > when I finish it since I have to work on my PhD. But I will try to finish as > soon as possible. I will contact you when I have a question. Thank you. > > Regards, > > Baljinnyam