Can you please show me an example? I am quite new to matpower. Sorry for troubling you every time.
On Tue, Dec 10, 2013 at 9:23 AM, Ray Zimmerman <[email protected]> wrote: > The power flow code in MATPOWER is pretty straightforward, so if you are > familiar with the details of the algorithms and become familiar with the > code, it should be quite possible. > > I suggest duplicating fdpf.m, for example, and making modifications to > your copy. > > -- > Ray Zimmerman > Senior Research Associate > B30 Warren Hall, Cornell University, Ithaca, NY 14853 > phone: (607) 255-9645 > > > > On Dec 9, 2013, at 10:18 PM, Nirav Shah <[email protected]> wrote: > > Thank you very much sir. > > I have one more doubt. I am using newton-fast decoupled method to run a > power flow. > > My work includes an extra column in Jacobian for (dp/dx) where x is for > the frequency. > > Is it possible to add that column in Jacobain and run power flow to solve > for dx as well? > > > On Mon, Dec 9, 2013 at 2:38 PM, Ray Zimmerman <[email protected]> wrote: > >> MATPOWER does not have a built-in option to minimize the flow of a >> specified line, but there are a few ways you could approach solving the >> problem … >> >> (1) Brute force, run an optimal power flow in a loop where you decrease >> the rating of the line in question at each iteration until the problem >> becomes infeasible. If your changes are small enough, the last feasible >> solution should be near the minimal flow in the line. >> >> (2) Use a DC OPF, and create a user-defined cost on the flow on the line >> in question. >> >> (3) Split the line in half, with a dummy bus in the middle. Split this >> dummy bus into 2 dummy buses (A and B) and put a generator at each to >> represent the flow. Constrain generation at A to equal the negative of >> generation at B, constrain voltages at A and B to be equal. Put a quadratic >> cost on the generators at A and B to force them toward zero. >> >> The first option is probably the least amount of work if it is a one-time >> simulation and the problem is small. >> >> -- >> Ray Zimmerman >> Senior Research Associate >> B30 Warren Hall, Cornell University, Ithaca, NY 14853 >> phone: (607) 255-9645 >> >> >> >> On Dec 9, 2013, at 1:18 PM, Nirav Shah <[email protected]> wrote: >> >> Hi all, >> I want to minimize the power flow from a particular branch when I change >> the load and run power flow/ optimal power flow again. >> >> Is it possible? Please reply as early as possible. >> >> Thank you. >> >> >> >> > >
