The power flow problem simply computes flows based on specified injections and voltages. Once you start enforcing limits (Q limits on generators, line limits, etc) you have to specify how the problem formulation changes when a limit is reached (i.e. how are your fixed inputs expected to change in order to avoid violating the limit).
For example, when enforcing a Q limit on a generator, it is necessary to allow the voltage to deviate from the set-point, and this is easily done by converting the bus from a PV to a PQ bus. On the other hand, attempting to respect transmission constraints would involve redispatching generators and there are many ways that could be done. So, the short answer is, no, there isn't an easy way to have a power flow problem respect transmission constraints. The easiest way would probably be to turn it into an OPF problem with the costs designed so as to minimize the deviations from the prescribed set-points or something. -- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Jul 9, 2013, at 8:13 AM, Sashireka Appalasamy <[email protected]> wrote: > Dear MATPOWER users, > > I have seen that the MATPOWER's optimal power flow problem considers the > transmission constraints but the power flow problem does not. Could I know > if would it be possible to consider the transmission constraints for the > load flow problem too? > > Sincerely, > Sashi
