While it is theoretically possible to construct such a case, I think this is a completely moot point. The only time the real power injections at both ends of a line are positive is when the active power flow is near zero (not, for example, 100MW and 70 MW). Theoretically we could define the capacity to be a number smaller than the losses, but larger than either injection, creating the “dilemma” you pose, but nobody builds a line whose limit can be exceeded when the “flow” is less than the losses of the line.
So, no, I have no plans to consider case 2. -- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Nov 12, 2013, at 12:24 PM, Aftognosia Aftognosia <[email protected]> wrote: > I am trying to analyse in depth , the code of matpower in order to make > suggestions to you. > SO in terms of losses, let us assume that bus A and bus B are both connected > to each other. > A power comes out of bus A and is 100MW and power goes into bus B and is > 70MW. > So the losses are 30MW. > Line capacity is 100MW. > > Recently, a questions has been asked about the following situation. > The power coming out of bus A is 100MW and the power going into bus B is > -70MW. > So the losses are 100 + 70 = 170 MW. > The line capacity is 100MW. > But the losses are 170MW > line capacity = 100MW. > > If we consider the losses as a power that comes out of a certain point in > line, then this is possible (case 1). However, in the research community > there have been suggestions to consider the losses less than the line > capacity (case 2). > As far as I can see, you consider the first case in Matpower. Do you aim at > considering the second case ?
